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  • Other Sources  (1,691)
  • FLUID MECHANICS AND HEAT TRANSFER  (1,301)
  • Industrial Chemistry
  • Inorganic Chemistry
  • Seismology
  • 1975-1979  (1,300)
  • 1970-1974  (274)
  • 1950-1954  (72)
  • 1930-1934  (30)
  • 1920-1924
Collection
Source
Keywords
Publisher
Years
Year
  • 1
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    Are foreshocks distinctive? Evidence from the 1966 Parkfield and the 1975 Oroville, California sequences (1979)
    In:  Bull. Seism. Soc. Am., Washington D.C., Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 69, no. 4, pp. 1027-1038, pp. L09611
    Details
    Publication Date: 1979
    Keywords: Fore-shocks ; Earthquake ; Discrimination ; Earthquake precursor: prediction research ; Spectrum ; Corner frequency ; Seismology ; Body waves ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Subduction of the Nazca plate beneath Peru: Evidence from spatial distribution of earthquakes (1979)
    In:  Geophys. J. R. astr. Soc., Warszawa, Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 57, no. 1, pp. 537-555, pp. 2121
    Details
    Publication Date: 1979
    Keywords: Subduction zone ; Seismicity ; Seismology ; South ; America ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Attenuation of P and S waves diffracted around the core (1979)
    In:  Geophys. J. R. astr. Soc., London, Elsevier, vol. 57, no. 8, pp. 353-379, pp. 2083, (ISBN 1-86239-117-3)
    Details
    Publication Date: 1979
    Keywords: earth mantle ; Seismology ; P-waves ; Shear waves ; Q-structure ; Quality factor ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    P and S waves diffracted around the core and the velocity structure at the base of the mantle (1979)
    In:  Geophys. J. R. astr. Soc., London, Elsevier, vol. 57, no. 8, pp. 381-395, pp. 2083, (ISBN 1-86239-117-3)
    Details
    Publication Date: 1979
    Keywords: earth mantle ; Seismology ; P-waves ; Shear waves ; Q-structure ; Quality factor ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    New Zealand and Antarctic seismology (1979)
    In:  Earthquake Information Bulletin, Münster, Amer. Sc., vol. 11, no. 4, pp. 170-174, pp. 1228, (ISBN 0-471-26610-8)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Review article ; Project report/description
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    BIBLIOGRAPHY SEISMOLOGY
  • 6
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    A moment magnitude scale (1979)
    In:  J. Geophys. Res., Luxembourg, Conseil de l'Europe, vol. 84, no. 7055, pp. 2348-2350, pp. B05S07, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Magnitude ; Source parameters ; seismic Moment ; Statistical investigations ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 7
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    A semi-empirical approach to prediction of long-period ground motions from great earthquakes (1979)
    In:  Bull. Seism. Soc. Am., Amsterdam, Elsevier Scientific Publishing Company, vol. 69, no. 2, pp. 1645-1670, pp. 2265, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Strong motions ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 8
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    A review of the 1356 Basel earthquake: Basic data (1979)
    In:  Tectonophys., Bonn, 3-4, vol. 53, no. 10, pp. 325-333, pp. L10306, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Earthquake
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    BIBLIOGRAPHY SEISMOLOGY
  • 9
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    The deep structure of the continents (1979)
    In:  Sci. Am., Reykjavík, Icelandic Meteorological Office, Ministry for the Environment University of Iceland, vol. 240 , no. 1, pp. 92-107, pp. TC1011, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Earth model, also for more shallow analyses ! ; Lithosphere ; earth mantle ; SciAm
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    BIBLIOGRAPHY SEISMOLOGY
  • 10
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    A modified form of the Gutenberg-Richter magnitude-frequency relation (1979)
    In:  Bull. Seism. Soc. Am., Kunming, China, 4, vol. 69, no. 4, pp. 1209-1214, pp. L13613, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Magnitude ; Seismology ; Seismicity ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 11
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    Magnitude corrections for attenuation in the upper mantle (1979)
    In:  Geophys. J. R. astr. Soc., Zagreb, 3-4, vol. 57, no. 1, pp. 609-638, pp. B06305, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Attenuation ; Inelastic ; Magnitude ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 12
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    Shear velocity structure in the eastern United States from the inversion of surface-wave group and phase velocities (1979)
    In:  Bull. Seism. Soc. Am., Luxembourg, Conseil de l'Europe, vol. 69, no. 1, pp. 1133-1148, pp. L09610, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Shear waves ; Surface waves ; Phase velocity ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 13
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    Seismic source theory (1979)
    In:  Rev. Geophys. Space Phys., San Francisco, Schweizerbart'sche Verlagsbuchhandlung, vol. 17, no. B10, pp. 328-336, pp. B10404, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publication Date: 1979
    Keywords: Source ; Seismology ; Review article
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    BIBLIOGRAPHY SEISMOLOGY
  • 14
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    Structure under Mount Rainier, Washington, inferred from teleseismic body waves (1979)
    In:  J. Geophys. Res., Basel, Elsevier Science Publishers, vol. 84, no. B9, pp. 4749-4762, pp. L15S20, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Teleseismic events ; Seismology ; Volcanology ; Velocity depth profile ; USA ; Geol. aspects ; Body waves ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 15
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    Comment on "Dispersion function computations for unlimited frequency values" by Anas Abo Zena (1979)
    In:  Geophys. J. R. astr. Soc., Hannover, Conseil de l'Europe, vol. 59, no. 1, pp. 315-323, pp. L24314, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Dispersion ; Frequency ; Seismology ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 16
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    Observations of sPn from Swabian Alb earthquakes at the GRF-Array (1979)
    In:  J. Geophys., Würzburg, Physica-Verlag, vol. 45, no. 1, pp. 337-340, pp. L24313, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: P-waves ; Seismic arrays ; Seismology ; ConvolutionR
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    BIBLIOGRAPHY SEISMOLOGY
  • 17
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    On the relation between seismic moment and stress drop in the presence of stress and strength heterogeneity (1979)
    In:  J. Geophys. Res., San Francisco, Pergamon, vol. 84, no. B5, pp. 2243-2250, pp. B05315, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: seismic Moment ; Stress drop ; Stress ; Strength ; Seismology ; Modelling ; Source parameters ; Inhomogeneity ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 18
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    Magnitude corrections for attenuation in the upper mantle (1979)
    In:  Geophys. J. R. astr. Soc., Zagreb, 3-4, vol. 57, no. 5372, pp. 609-638, pp. B06305, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Attenuation ; Magnitude ; Nuclear explosion ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 19
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    Studies of seismicity and selected focal mechanisms in Switzerland (1979)
    In:  Schweiz. mineral. petrogr. Mitt., Bonn, 3-4, vol. 59, no. 10, pp. 127-132, pp. L10306, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismicity ; Seismology ; Fault plane solution, focal mechanism ; Muller
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    BIBLIOGRAPHY SEISMOLOGY
  • 20
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    Observations relevant to seismic driving stress, stress drop, and efficiency (1979)
    In:  J. Geophys. Res., New York, August, vol. 84, no. 3-4, pp. 2251-2261, pp. 1610, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Stress ; Stress drop ; Energy (of earthquakes) ; Source parameters ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 21
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    An integral equation for dynamic elastic response of an isolated 3-D crack (1979)
    In:  Wave Motion, Tulsa, 3-4, vol. 1, no. 13, pp. 187-192, pp. B10303, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1979
    Keywords: Dislocation ; cracks and fractures (.NE. fracturing) ; Seismology
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    BIBLIOGRAPHY SEISMOLOGY
  • 22
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    Aleutian subduction zone seismicity, volcano-trench separation, and their relation to great thrust-type earthquakes (1979)
    In:  J. Geophys. Res., London, Army Corps of Engineers, Woodward-Clyde Consultants, vol. 84, no. 5, pp. 4583-4591, pp. 1013, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1979
    Keywords: Subduction zone ; Seismology ; Seismicity ; Volcanology ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 23
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    On the relation between Modified Mercalli intensity and body-wave magnitude (1979)
    In:  Bull. Seism. Soc. Am., Dordrecht, Martinus Nijhoff Publishers, vol. 69, no. 3, pp. 893-909, pp. L11307, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Intensity ; Magnitude ; BSSA ; body wave Magnitude
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    BIBLIOGRAPHY SEISMOLOGY
  • 24
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    On the observability of isotropic seismic sources: the July 31, 1970 Colombian earthquake (1979)
    In:  Phys. Earth Plan. Interiors, Kyoto, AGU, vol. 18, no. B1, pp. 176-196, pp. L24302, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Earthquake ; PEPI
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    BIBLIOGRAPHY SEISMOLOGY
  • 25
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    An in situ velocity study: the Stone Canyon well (1979)
    In:  J. Geophys. Res., Berlin, Pergamon, vol. 84, no. B2, pp. 672-678, pp. B04306, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Velocity ; Seismology ; Earthquake precursor: prediction research ; Earthquake precursor: Vp/Vs anomalies ; JGR ; Body waves
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    BIBLIOGRAPHY SEISMOLOGY
  • 26
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    Seismic signal detection and parameter estimation (1979)
    In:  Geophys. Prosp., Luxembourg, Conseil de l'Europe, vol. 27, no. 1, pp. 1-15, pp. 1068, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Detectors ; Seismology ; Statistical investigations ; CoherencyE
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    BIBLIOGRAPHY SEISMOLOGY
  • 27
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    Elastic Waves in the Earth (1979)
    Elsevier
    In:  Amsterdam, 490 pp., Elsevier, vol. 11, no. Publ. No. 12, pp. 127, (3-540-43395-3)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Textbook of geophysics
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    BIBLIOGRAPHY SEISMOLOGY
  • 28
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    Dispersion function computations for unlimited frequency values (1979)
    In:  Geophys. J., vol. 58, no. B11, pp. 91-105
    Details
    Publication Date: 1979
    Keywords: Seismology ; Layers ; Dispersion ; Frequency ; Synthetic seismograms
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    BIBLIOGRAPHY SEISMOLOGY
  • 29
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    Determination of geometric and dynamic focal parameters for some strong intermediate earthquakes in the Vrancea region (1979)
    In:  Rev. Roum. Géol., Géophys. et Géogr. - Géophysique, Münster, 3, vol. 23, no. 3-4, pp. 39-49, pp. L12311, (ISBN 0-471-26610-8)
    Details
    Publication Date: 1979
    Keywords: Source parameters ; Seismology ; EUROPROBE (Geol. and Geophys. in eastern Europe)
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    BIBLIOGRAPHY SEISMOLOGY
  • 30
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    Travel time inversion: A geometrical approach (1979)
    In:  J. Geophys. Res., Berlin, Inst. Electrical & Electronics Engineers, vol. 84, no. 4, pp. 3615-3622, pp. B04307, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 1979
    Keywords: Travel time ; Inversion ; Data analysis / ~ processing ; Seismics (controlled source seismology) ; Seismology ; JGR
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  • 31
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    Instantaneous power spectra (1979)
    Naval Ocean Systems Center
    In:  report, San Diego, Naval Ocean Systems Center, vol. 1, no. paper SPWLA 90-C, pp. M1-M4, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Seismics (controlled source seismology) ; Power spectrum ; Spectrum
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    BIBLIOGRAPHY SEISMOLOGY
  • 32
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    Spektralanalyse seismischer Wellen zur Beschreibung des Scherbruches bei den Erdbeben in Friaul (1979)
    Inst. f. Geophys., Univ. Stuttgart
    In:  Diplomarbeit, Granada, 10-12 June 1999, Inst. f. Geophys., Univ. Stuttgart, vol. 339-350, no. 32, pp. 103-108, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Spectral analysis ; Spectrum ; Earthquake ; Seismology ; Fracture
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    BIBLIOGRAPHY SEISMOLOGY
  • 33
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    Numerical modeling of transient wave fields in seismology and seismic prospecting (1979)
    In:  Preprint, Novosibirsk, Air Force Geophysics Laboratory, no. AFGL-TR-87-0230, pp. 103-155
    Details
    Publication Date: 1979
    Keywords: Modelling ; Seismology ; Seismics (controlled source seismology) ; Wave propagation
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    BIBLIOGRAPHY SEISMOLOGY
  • 34
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    Dynamic Green's functions for layered media and application to boundary-value problem (1979)
    Univ. Calif.
    In:  Ph.D. Thesis, San Diego, Univ. Calif., vol. 11, no. PEER Utilities Pgm. Rep. 2000/17, 24 pp., pp. 207
    Details
    Publication Date: 1979
    Keywords: Modelling ; Layers ; Synthetic seismograms ; Seismology
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    BIBLIOGRAPHY SEISMOLOGY
  • 35
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    Geologische Erdbebenphänomene im Gefolge von Nuklear- und Molecularexplosionen (1979)
    Forschungsinstitut für militärische Bautechnik
    In:  report, Zürich, Forschungsinstitut für militärische Bautechnik, vol. 10, no. FMB 79.10, pp. 2985-3018
    Details
    Publication Date: 1979
    Keywords: Nuclear explosion ; Seismology ; Buechi ; Buchi
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    BIBLIOGRAPHY SEISMOLOGY
  • 36
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    Eine anormale Geschwindigkeitsstruktur im oberen Erdmantel unter den Ostalpen, abgeleitet aus teleseismischen Laufzeit Residuen der Stationen Schlegeis und Gräfenberg (1979)
    Ludwig-Maximilians-Universität
    In:  Diplomarbeit, München, Ludwig-Maximilians-Universität, vol. 10, no. 28, pp. 309-314
    Details
    Publication Date: 1979
    Keywords: Teleseismic events ; Velocity analysis ; earth mantle ; Seismology ; Bruestle ; Brustle
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    BIBLIOGRAPHY SEISMOLOGY
  • 37
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    Fault plane solutions using relative amplitudes of P and surface reflections: further studies (1979)
    In:  Geophys. J. R. astr. Soc., Basle, Wiley, vol. 60, no. 5441, pp. 459-487, pp. 1264, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Source ; Seismology ; Fault plane solution, focal mechanism ; GJRaS
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  • 38
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    Die Anwendung von Vorhersagefiltern zur Ereigniserkennung bei digitalen Breitbandseismogrammen (1979)
    Bundesanstalt f. Geowissenschaften und Rohstoffe
    In:  Hannover, Bundesanstalt f. Geowissenschaften und Rohstoffe, vol. 25, no. Publ. No. 12, pp. 95-104, (ISBN: 0-08-043930-6)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Detectors ; Filter- ; Broad-band
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  • 39
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    Erdbeben (1979)
    Hallwag
    In:  Stuttgart, Hallwag, vol. 30, no. Publ. No. 12, pp. 95-104, (ISBN 0-865-42078-5)
    Details
    Publication Date: 1979
    Keywords: Earthquake ; Seismology ; Textbook of geophysics
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    BIBLIOGRAPHY SEISMOLOGY
  • 40
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    CEDAR: An approach to the computer automation of short period local seismic networks (1979)
    Caltech
    In:  Ph.D. Thesis, Pasadena, CA., Caltech, vol. C 560, 183 pp., no. PL-TR-91-2212(I), pp. 79-84, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Detectors ; sta ; Seismology ; Seismic networks ; High frequency ...
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  • 41
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    A first order scattering solution for modeling elastic wave codas. Part 1. The acoustic case (1979)
    In:  Preprint, Beijing, Halliburton Logging Services, vol. C 560, 183 pp., no. PL-TR-91-2212(II), pp. 938-939, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Seismics (controlled source seismology) ; Scattering ; Coda (waves, ~ of seismograms) ; Wave propagation ; Acoustics
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  • 42
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    Die Bestimmung der seismischen Wellenenergie im Zeitbereich unter Verwendung der digitalen Registrierungen des Seismologischen Zentralobservatoriums Gräfenberg (1979)
    Inst. f. Meteorol. und Geophys., Goethe Univ. Frankfurt
    In:  Diplomarbeit, Roma, Inst. f. Meteorol. und Geophys., Goethe Univ. Frankfurt, vol. C 560, 183 pp., no. 78 (?), pp. 193-210, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Seismic arrays ; Data analysis / ~ processing ; Energy (of earthquakes)
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  • 43
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    Deep structure of the Earth's crust and upper mantle in the USSR according to geophysical and seismological data (1979)
    Lawrence Livermore National Laboratory
    In:  rept., Livermore, Calif., Lawrence Livermore National Laboratory, vol. 10, no. UCID-18099, pp. 1358-1361, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Review article ; Deep seismic sounding (espec. cont. crust) ; CRUST ; earth mantle ; Seismology ; EUROPROBE (Geol. and Geophys. in eastern Europe)
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  • 44
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    Crustal structure of the western United States (1979)
    U. S. Geol. Surv.
    In:  Prof. Paper, Menlo Park, California, U. S. Geol. Surv., vol. 1034, no. 77-3, pp. 1-74, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Deep seismic sounding (espec. cont. crust) ; Velocity depth profile ; USGS ; USA ; Seismics (controlled source seismology) ; Seismology
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    BIBLIOGRAPHY SEISMOLOGY
  • 45
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    Surface wave focal mechanisms for eastern North American earthquakes with tectonic implications (1979)
    In:  J. Geophys. Res., Zagreb, Conseil de l'Europe, vol. 84, no. 4, pp. 3543-3552, pp. L02307, (ISSN 0343-5164)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Fault plane solution, focal mechanism ; Surface waves ; Tectonics ; Source ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 46
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    SH-wave generation by dislocation sources - A numerical study (1979)
    In:  Bull. Seism. Soc. Am., Zagreb, Conseil de l'Europe, vol. 69, no. 4, pp. 1-15, pp. L02307, (ISSN 0343-5164)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Dislocation ; SH waves ; Source ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 47
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    Determination of the seismic design parameters: a stochastic approach (1979)
    Stanford University, California
    In:  Ph.D. Thesis, La Jolla, CA, Stanford University, California, vol. 1034, no. 77-767, pp. 293-297, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Seismic networks ; Seismic arrays ; Statistical investigations
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    BIBLIOGRAPHY SEISMOLOGY
  • 48
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    HYPOELLIPSE - A computer program for determining local earthquake hypocentral parameters, magnitude, and first motion pattern (1979)
    U. S. Geol. Surv.
    In:  Open-File Report, Houston, U. S. Geol. Surv., vol. C 560, 183 pp., no. 79-431, pp. 1-57, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Source parameters ; Seismology ; Magnitude ; Hypocentral depth ; Location ; software ; USGS
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    Manual of seismological observatory practice (1979)
    NOAA, U. S. Department of Commerce
    In:  report, Houston, NOAA, U. S. Department of Commerce, vol. 10, no. SE-20, pp. 206-209, (ISBN 0 08 042822 3)
    Details
    Publication Date: 1979
    Keywords: Handbook of geophysics ; Seismology ; Instruments ; BIBTEX?
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    A numerical comparison with an exact solution for the transient response of a cylinder immersed in a fluid (1979)
    In:  CASI
    Details
    Publication Date: 2006-07-02
    Description: The transient response of an elastic cylindrical shell immersed in an acoustic media that is engulfed by a plane wave is determined numerically. The method applies to the USA-STAGS code which utilizes the finite element method for the structural analysis and the doubly asymptotic approximation for the fluid-structure interaction. The calculations are compared to an exact analysis for two separate loading cases: a plane step wave and an exponentially decaying plane wave.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Shock and Vibration Inform. Center The Shock and Vibration Bull., Pt. 3; p 23-28
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    Numerical solution of compressible viscous flows (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: The presented review is concerned with the problem of calculating compressible viscous flows. Basic numerical considerations and problems associated with calculating viscous flows are examined and current numerical approaches toward the solution of the Navier-Stokes equations are discussed. It is pointed out that the numerical solution of the full time-dependent equations for turbulent flow is not practical with present computers. Therefore, turbulence effects must be accounted for by modeling. Developments related to turbulence modeling are described. In connection with a discussion of numerical methods for solving viscous flow equations, attention is given to numerical domains of dependence of typical explicit and implicit methods, the diffusion problem, the convection-diffusion problem, and the split-hybrid method.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
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    The effect of external boundary conditions on condensation heat transfer in rotating heat pipes (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Experimental evidence shows the importance of external boundary conditions on the overall performance of a rotating heat pipe condenser. Data are presented for the boundary conditions of constant heat flux and constant wall temperature for rotating heat pipes containing either pure vapor or a mixture of vapor and noncondensable gas as working fluid.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: International Journal of Heat and Mass Transfer; 22; Aug. 197
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  • 53
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    Turbulence generated by the interaction of entropy fluctuations with non-uniform mean flows (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: The turbulence generated by random entropy fluctuations in an accelerating stream is analyzed. The results are obtained by using rapid distortion theory together with a high frequency solution of a previously developed wave equation that governs the small-amplitude unsteady vortical and entropic motion on steady potential flows (Goldstein, 1978). Simple results are obtained for the case of symmetric contraction, expansion or combination of the two. It is shown that the energy of the entropy-generated turbulence increases more rapidly with the contraction ratio of a subsonic flow than that of any imposed upstream turbulence. This result indicates that the entropy-generated turbulence may be more significant than the hydrodynamically generated turbulence in the turbine stages of aircraft engines.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Journal of Fluid Mechanics; 93; July 26
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  • 54
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    Transient ablation of Teflon in intense radiative and convective environments (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: On the basis of this investigation of the high-temperature behavior of polytetrafluoroethylene (PTFE), the transient one-dimensional ablation of PTFE has been developed by taking into account the optical transmittance of both the amorphous zone and the crystalline zone of PTFE layer. Results show that although the exposed surface receded at an apparently steady state, both the internal temperature and the thickness of the gel layer increase continuously due to the internal absorption of radiation.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: AIAA Journal; 17; June 197
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  • 55
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    Scattering and distortion of the unsteady motion on transversely sheared mean flows (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: It is shown that the pressure and velocity fluctuations of the unsteady motion on a transversely sheared mean flow can be expressed entirely in terms of the derivatives of two potential functions. One of these is a convected quantity that can be specified as a boundary condition and is related to a transverse component of the upstream velocity field. The other can be determined by solving an inhomogeneous wave equation whose source term is also a convected quantity that can be specified as a boundary condition in any given problem. The general theory is used to study the interaction of an unsteady flow with a semi-infinite plate embedded in a shear layer. The acoustic field produced by this interaction is calculated in the limits of low and high frequency. The results are compared with experimental one-third octave sound pressure level radiation patterns. The agreement is found to be excellent, especially in the low frequency range, where the mean-flow and convective effects are shown to have a strong influence on the directivity of the sound.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Journal of Fluid Mechanics; 91; Apr. 27
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  • 56
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    Laminar boundary-layer flow of non-Newtonian fluid (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: A solution for the two-dimensional and axisymmetric laminar boundary-layer momentum equation of power-law non-Newtonian fluid is presented. The analysis makes use of the Merk-Chao series solution method originally devised for the flow of Newtonian fluid. The universal functions for the leading term in the series are tabulated for n from 0.2 to 2. Equations governing the universal functions associated with the second and the third terms are provided. The solution together with either Lighthill's formula or Chao's formula constitutes a simple yet general procedure for the calculation of wall shear and surface heat transfer rate. The theory was applied to flows over a circular cylinder and a sphere and the results compared with published data.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: International Journal of Heat and Mass Transfer; 22; Oct. 197
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  • 57
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    Evolution of a rotating flow in the vicinity of a surface (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Evolution of a rotating flow in a body of fluid bounded by a stationary flat surface is discussed. The calculated results show that the radial pressure gradient is substantially reduced in the region close to the surface, so that letting that gradient be independent of distance from the surface would be expected to give only rough or qualitative estimates. However, the reduced rotation near the stationary surface is still large enough to cause an inflow near the surface and to set up a recirculation pattern. The concentration of vorticity by the radial inflow is not great enough to increase the tangential velocities near the center of rotation.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
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    Solitary waves in stratified shear flows (1979)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: An analysis is described of long, finite-amplitude internal waves in a stratified shear flow. Both regular and singular modes are considered with a nonlinear critical layer employed in the latter case. A three-layer model is used to develop the theory and closed-form expressions are obtained relating the phase speed to the Richardson number, the latter quantity being taken as O(1). The amplitude evolution equation is found to be either the Korteweg-de Vries equation or the Benjamin-Davis-Ono equation depending upon the distance of the more remote boundary from the edge of the shear layer.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Geophysical and Astrophysical Fluid Dynamics; 13; 1-3,; 1979
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    The shape of a pendent liquid drop (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Formal solutions of the static equilibrium equations for the form of the outer surface of a pendent liquid drop are studied. An approach is adopted in which only the one-parameter family determined by vertex height (u sub 0) need be described. Attention is restricted to rotationally symmetric configurations, and all symmetric solutions are characterized for the case where the Lagrange parameter lambda is equal to zero. It is shown that for any u sub 0 the function u(r; u sub 0) can be extended as a parametric solution of a system of equations for all arc lengths, yielding a curve without limit sets or double points, and that the resulting capillary rotation surface spreads out indefinitely away from the axis r = 0. The asymptotic form of the surface in the case of large absolute values of u sub 0 is characterized quantitatively, along with the global structure of all such surfaces.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
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  • 60
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    Transient thermal response of ablating bodies (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: A numerical study of transient thermal response of a blunt-nosed axisymmetric body made of Teflon is presented using a two-layer thermal model. It is shown that phase change and transverse heat conduction have a considerable effect on the internal temperature field. Comparison of the numerical results with experimental data shows that the single-layer thermal model does not predict the real feature of the thermal field, whereas the results of the two-layer thermal model agree reasonably well with the experiment.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: AIAA Journal; 17; Feb. 197
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  • 61
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    Comparison of a correlation term-discard closure for decaying homogeneous turbulence with experiment (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Turbulence decay is calculated by using experimental initial conditions and discarding quadruple-correlation terms in the correlation equations. Agreement with experiment is good only for moderately small times, but there are no perceptible negative spectral energies even at large times.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Physics of Fluids; 22; Jan. 197
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    A computational fluid dynamic technique valid at the centerline for non-axisymmetric problems in cylindrical coordinates (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: A technique is described for the numerical solution of non-axisymmetric flow problems posed in cylindrical coordinates when the z-axis is included in the flowfield. The highlight of the technique is the manner in which the singularities at the centerline are handled. Specifically, the governing flowfield equations at r = 0 are put in a special form by applying L'Hospital's Rule. The required radial derivatives are evaluated using a one-sided, second-order accurate, first-difference. This leads to a smooth, convergent calculation of the flowfield at the centerline. This appears to be the first generally applicable numerical method for avoiding coordinate system singularities in the context of a finite-difference scheme, and could have application to many nonaxisymmetric flows. The technique is illustrated by specific results for the time-dependent flowfield inside an internal combustion engine.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Journal of Computational Physics; 30; Mar. 197
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    Surface tension driven convection (1979)
    In:  CASI
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    Publication Date: 2016-06-07
    Description: In a normal gravitational environment, the free surface of a liquid in a container plays a passive role in the transport processes. However, at microgravity, the free surface can become the dominant factor. A simple but meaningful spaceflight experiment is proposed to investigate the nature and extent of flows induced by surface-tension gradients along the free surface. The influences of container geometry, wetability, contamination, and imposed heating modes will be investigated.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Alabama Univ. UAH(NASA Workshop on Fluids Expt. System; p 43-51
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    Investigations on transparent liquid-miscibility gap systems (1979)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Sedimentation and phase separation is a well known occurrence in monotectic or miscibility gap alloys. Previous investigations indicate that it may be possible to prepare such alloys in a low-gravity space environment but recent experiments indicate that there may be nongravity dependent phase separation processes which can hinder the formation of such alloys. Such phase separation processes are studied using transparent liquid systems and holography. By reconstructing holograms into a commercial-particle-analysis system, real time computer analysis can be performed on emulsions with diameters in the range of 5 micrometers or greater. Thus dynamic effects associated with particle migration and coalescence can be studied. Characterization studies on two selected immiscible systems including an accurate determination of phase diagrams, surface and interfacial tension measurements, surface excess and wetting behavior near critical solution temperatures completed.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Alabama Univ. UAH(NASA Workshop on Fluids Expt. System; p 21-35
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    Phase separation in transparent liquid-liquid miscibility gap systems (1979)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A program to be carried out on transparent liquid-phase miscibility gap materials was developed for the purpose of acquiring additional insight into the separation process occurring in these systems. The transparency feature allows the reaction to be viewed directly through light scattering and holographic methods.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Alabama Univ. UAH(NASA Workshop on Fluids Expt. System; p 3-17
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    Measurement of surface velocity fields (1979)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A new technique for measuring surface velocity fields is briefly described. It determines the surface velocity vector as a function of location and time by the analysis of thermal fluctuations of the surface profile in a small domain around the point of interest. The apparatus now being constructed will be used in a series of experiments involving flow fields established by temperature gradients imposed along a surface.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Alabama Univ. UAH(NASA Workshop on Fluids Expt. System; p 36-42
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    The migration of fluid droplets and their interactions in a thermal gradient (1979)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: When materials are processed in free fall, buoyant forces will be substantially reduced. Thus, the buoyant migration of droplets and bubbles which normally occurs on earth is expected to be overshadowed by migration due to other mechanisms in space processing. In particular, capillary forces on droplets due to the variation of interfacial tension around their periphery will play a significant role in governing their motion in space. While such interfacial tension gradients can be caused by thermal, compositional, and/or electrical gradients in the continuous phase, thermal gradients are convenient to use in controlled experimentation. On earth, due to interference from buoyant effects, it is difficult to study thermocapillary migration in sufficient detail. Also, the effects of a thermal gradient on the interactions among droplets are hard to study on Earth. Thus, an orbital facility for conducting experiments on the migration and interactions of fluid droplets in a continuous phase due to the action of a thermal gradient appears attractive.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Alabama Univ. UAH(NASA Workshop on Fluids Expt. System; p 53-57
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    Measurement of diffusion coefficients from solution rates of bubbles (1979)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The rate of solution of a stationary bubble is limited by the diffusion of dissolved gas molecules away from the bubble surface. Diffusion coefficients computed from measured rates of solution give mean values higher than accepted literature values, with standard errors as high as 10% for a single observation. Better accuracy is achieved with sparingly soluble gases, small bubbles, and highly viscous liquids. Accuracy correlates with the Grashof number, indicating that free convection is the major source of error. Accuracy should, therefore, be greatly increased in a gravity-free environment. The fact that the bubble will need no support is an additional important advantage of Spacelab for this measurement.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Alabama Univ. UAH(NASA Workshop on Fluids Expt. System; p 18-20
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  • 69
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    Modular heat pipe radiator system study (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-167829 , NAS 1.26:167829
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    Velocity field near the jet orifice of a round jet in a crossflow (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Experimentally determined velocities at selected locations near the jet orifice are presented and analyzed for a round jet in crossflow. Jet-to-crossflow velocity ratios of four and eight were studied experimentally for a round subsonic jet of air exhausting perpendicularly through a flat plate into a subsonic crosswind of the same temperature. Velocity measurements were made in cross sections to the jet plume located from one to four jet diameters from the orifice. Jet centerline and vortex properties are presented and utilized to extend the results of a previous study into the region close to the jet orifice.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-152293
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    Mobile tile glazing high density radiant heating system Model 1023/8. Preliminary manual and instruction manual (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-163705
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    Bellows flow-induced vibrations (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Results of theoretical and experimental investigations of bellows typical of those found in space shuttle external tanks are presented. Correlation parameters are identified which generalize the alternating stress calculations cited in an earlier study. Alternating stress amplitudes and mean stress levels form the basis of a fatigue analysis incorporating seven ordinate charts for 347 stainless steel, alloy 21 6-9, and Inco 718. A crack propagation model is included with a program for computing bellows fatigue life. Two phase flow and material hardness properties are discussed.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-161308
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    Free convection about a rectangular prismatic crystal growing from a solution (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Sodium chlorate crystals growing from unstirred aqueous solutions were observed by Schlieren techniques. Growth rate data were best correlated by a Sherwood number with finite interface kinetics and a characteristic length equal to the crystal height plus the inverse reciprocal sum of the horizontal dimensions. The growth rate was slightly higher when the plume was laminar than when it was irregular. The horizontal growth rate was greater than the vertical growth rate, with the ratio tending to decrease with increasing plume instability. The threshold Grashof number for plume instability was greatly decreased with decreasing height for crystals with the same horizontal dimensions. The velocity of the eddies approached a constant value with increasing distance above the crystal surface, the terminal value being roughly proportional to the ratio of the square root of the Rayleigh number to the crystal characteristic length.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: International Journal of Heat and Mass Transfer; 22; Dec. 197
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    A new approach to the correlation of boundary layer mass transfer rates with thermal diffusion and/or variable properties (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: A rational approach to the correlation of boundary layer mass transport rates, applicable to many commonly encountered laminar flow conditions with thermal diffusion and/or variable properties, is outlined. The correlation scheme builds upon already available constant property blowing/suction solutions by introducing appropriate correction factors to account for the additional ('pseudo' blowing and source) effects identified with variable properties and thermal diffusion. Applications of the scheme to the particular laminar boundary layer mass transfer problems considered herein (alkali and transition metal compound vapor transport) indicates satisfactory accuracy up to effective blowing factors equivalent to about one third of the 'blow off' value. As a useful by-product of the variable property correlation, we extend the heat-mass transfer analogy, for a wide range of Lewis numbers, to include variable property effects.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: International Journal of Heat and Mass Transfer; 22; Sept
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    Spectral characteristics of vortex breakdown flowfields (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Laser-Doppler anemometer measurements upstream and in the wakes of vortex breakdowns of bubble and spiral types are described. Spectral analysis of the data indicates prominent oscillations in the wakes at less than 10 Hz. These oscillations correspond closely to theoretical predictions of the linearly most unstable normal modes of the time-averaged mean flow profiles. The oscillations are more energetic, and vortex core expansions are greater for flows with a bubble form of vortex breakdown, which is therefore regarded as the stronger form of breakdown.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Physics of Fluids; 22; Nov. 197
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    Experimental investigation of flow and heating in a resonance tube (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Experiments have been performed to determine the basic mechanism of heating in resonance tubes of square section with constant area excited by underexpanded jet flows. The jet flow between the nozzle exit and the tube inlet plays a key role in the performance of a resonance tube. A detailed and systematic investigation of the unsteady complex shock structure in this part of the flow region has led to a better understanding of the fundamental mechanisms associated with the gas heating in such tubes. A study of the effects of tube location in relation to free-jet shock location (without the presence of the resonance tube) has shed further light on the underlying mechanism of sustained oscillations of the flow in a resonance tube.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Journal of Fluid Mechanics; 94; Oct. 29
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  • 77
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    An experimental study of multiple jet mixing (1979)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: Measurements of an incompressible jet issuing from an array of rectangular lobes, equally spaced with their small dimensions in a line, both as a free jet, and as a confined jet, are carried out in three parts: (1) on a single rectangular free jet, (2) on the same jet in a multiple free jet configuration, and (3) on the same jet in a multiple jet configuration with confining surfaces (two parallel plates are symmetrically placed perpendicular to the long dimension of each lobe covering the entire flow field under consideration). In the case of a single rectangular free jet, the flow field of the jet is characterized by the presence of three distinct regions in the axial mean velocity decay and are referred to as: potential core region, two dimensional type region, and axisymmetric type region. In the case of a multiple free jet, the flow field for downstream distance X greater than 60D (D = width of a lobe) resembles that of a jet exiting from a two dimensional nozzle with its short dimension being the long dimension of the lobe.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-166184 , SU-JIAA-TR-23
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    Homogeneous vortex model for liquid slosh in spinning spherical tanks (1979)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: The problem of forced fluid sloshing in a partially filled spinning spherical tank is solved numerically using the finite element method. The governing equations include Coriolis acceleration, empirical fluid damping and spatially homogeneous vorticity first introduced by Pfeiffer. An exponential instability similar to flutter is detected in the present simulation for fill ratios below 50 percent. This instability appears in the model as a result of the homogeneous vortex assumption since the free slosh equations are neutrally stable in the Liapunov sense.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-162725 , JPL-PUB-79-99
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    Effect of streamwise vortices on Tollmien-Schlichting waves (1979)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: The method of multiple scales is used to determine a first order uniform expansion for the effect of counter rotating steady streamwise vortices in growing boundary layers on Tollmien-Schlichting waves. The results show that such vortices have a strong tendency to amplify three dimensional Tollmien-Schlichting waves having a spanwise wavelength that is twice the wavelength of the vortices. An analytical expression is derived for the growth rates of these waves. These growth rates increase linearly with increasing amplitudes of the vortices.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-162654 , VPI-E-79-12
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    Relaminarization of fluid flows (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: The mechanisms of the relaminarization of turbulent flows are investigated with a view to establishing any general principles that might govern them. Three basic archetypes of reverting flows are considered: the dissipative type, the absorptive type, and the Richardson type exemplified by a turbulent boundary layer subjected to severe acceleration. A number of other different reverting flows are then considered in the light of the analysis of these archetypes, including radial Poiseuille flow, convex boundary layers, flows reverting by rotation, injection, and suction, as well as heated horizontal and vertical gas flows. Magnetohydrodynamic duct flows are also examined. Applications of flow reversion for turbulence control are discussed.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
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    Complete supersonic flowfields over blunt bodies in a generalized orthogonal coordinate system (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A general orthogonal coordinate system is used to describe various axisymmetric and two-dimensional shapes. Close approximations to planetary probe configurations are possible. The full Navier-Stokes equations are discretized in this coordinate system in a manner based on Allen and Cheng's numerical procedure. The blow shock is treated as a discontinuity which floats between grid points. Completely coupled flows over the forebody, base, and near wake were calculated over a cylinder, sphere, and an approximation to the Viking Aeroshell. Some problem areas in determining the base flow for increasing Reynolds number are discussed. In particular, it is found that the mean free path of the fluid near the wall immediately below the corner of the Viking Aeroshell, which experiences a severe expansion, can become greater than the local mesh size required to resolve the boundary layer in the forebody.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-TM-81784 , LOG-J11338
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  • 82
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    Recent improvements to the spinning body version of the EDDYBL computer program (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A conventional mixing length model specialized for thick boundary layers and a general model for pressure-strain correlation terms were added to the spinning version of EDDYBL. The models are discussed and modifications to the code input and output are presented.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-152347 , DCW-R-24-01
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  • 83
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    The transfer of carbon fibers through a commercial aircraft water separator and air cleaner (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The fraction of carbon fibers passing through a water separator and an air filter was determined in order to estimate the proportion of fibers outside a closed aircraft that are transmitted to the electronics through the air conditioning system. When both devices were used together and only fibers 3 mm or larger were considered, a transfer function of .001 was obtained.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-159183
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  • 84
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    Potential heat exchange fluids for use in sulfuric acid vaporizers (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A series of perhalocarbons are proposed as candidate heat exchange fluids for service in thermochemical cycles for hydrogen production that involve direct contact of the fluid with sulfuric acid and vaporization of the acid. The required chemical and physical criteria of the liquids are described and the results of some preliminary high temperature test data are presented.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-162548 , JPL-PUB-79-81
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  • 85
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    GIM code user's manual for the STAR-100 computer (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The General Interpolants Method (GIM), a three dimensional, time dependent, hybrid procedure for generating numerical analogs of the conversion laws, is described. The Navier-Stokes equations written for an Eulerian system are considered. The conversion of the GIM code to the STAR-100 computer, and the implementation of 'GIM-ON-STAR' is discussed.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-3157 , LMSC-HREC-0568850
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  • 86
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    A fundamental study of liquid spray evaporation at a heated surface (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The influence of feedwater temperature and the influence of pulsing nozzle flow on the heat transfer characteristics in the spray evaporative cooling process were investigated. A commercial water circulation heater was installed in the feedwater line between the supply reservoir and the nozzle. A pass through the heater provided water at temperatures up to 50 C at the nozzle; higher temperatures were obtained by multiple heater passes. A thermocouple installed in the water line just upstream of the nozzle provided a measure of the feedwater temperature. Initial tests were run with belljar exhaust orifice number two which provided a pressure in a range about 7mm Hg abs. The feedwater temperature was heated to a temperature of 45 C. Results indicate that for a given system operating pressure, there is an upper limit on the feedwater temperature above which the spray will flash to vapor before hitting the surface to be cooled.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-160409
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  • 87
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    Evaporative cooling on a grooved surface (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The transition point where water begins to accumulate on the surface during spray evaporative cooling was investigated experimentally to determine the temperatures and corresponding heat flux at which this transition occurs. Several pressure ranges were considered including one below the triple point of water. Additionally, the results using a grooved surface were compared to those using a smooth surface. It was determined that a grooved surface has no effect on the heat transfer.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-160410
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  • 88
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    Aerothermal performance of radiatively and actively cooled panel at Mach 6.6 (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A flight-weight radiative and actively cooled honeycomb sandwich panel (RACP) was subjected to multiple cycles of both radiant and aerothermal heating. The 0.61 m by 1.22 m test specimen incorporated essential features of a full scale 0.61 m by 6.10 m RACP designed to withstand a heat flux of 136 kW/sq m. The panel consisted of heat shields, a thin layer of high temperature insulation, and an aluminum honeycomb sandwich panel with coolant tubes next to the sandwich skin. A 60/40 mass solution of ethylene glycol/water was used to cool the panel which successfully withstood a total of 3.5 hr of radiant heating and 137 sec exposure to an M = 6.6 test stream. Heat shield temperatures reached 1080 K (1945 deg R), and cooled-panel temperatures reached 382 K (687 deg R) midway between coolant tubes. Simulation of the full scale panel indicated that the full scale RACP would perform as expected. The tests revealed no evidence of coolant leakage or hot gas ingress which would seriously degrade the RACP performance.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-TP-1595 , L-13355
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  • 89
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    A simplified model for the viscous crossflow in a slotted test section (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A simplified physical model was constructed which simulates the viscous crossflow in a fluid layer near the slots at a fixed streamwise location in a slotted wind tunnel. For low to moderate Reynolds numbers, numerical solutions of the two dimensional, incompressible Navier-Stokes equations in stream function and vorticity, which govern the model flow, were obtained. Fairly general slot geometry was incorporated by means of the Thompson-Thames-Mastin transformation. An approximate factorization scheme with cyclic acceleration parameters was employed to solve a finite difference analog of the stream function equation. The vorticity equation was numerically solved with a modified version of the classical alternating direction implicit scheme. Although no quantitative assessment of solution accuracy can be made, numerical results for variations in incremental wall pressure around the slat are at least qualitatively similar to some experimental results.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-3206
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  • 90
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    Application of data acquisition systems for on-line definition and control of wind tunnel shape (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Improvements in wind tunnel design to reduce test and flight discrepancies are analyzed. Flexible wall streamlining, criteria for tunnel streamlining, and error assessment are discussed. It is concluded that the concept of self-streamlining wind tunnels is suited for on-line computer control.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Von Karman Inst. for Fluid Dyn. Data Acquisition Systems and Data Analysis in Fluid Dyn.; 46 p
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  • 91
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    A method of estimating self-diffusion coefficients in liquids (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: AIChE Journal; 25; Jan. 197
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  • 92
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    A statistical model of turbulence in two-dimensional mixing layers (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: A statistical model of turbulence in fully developed two-dimensional incompressible turbulent mixing layers is proposed. The development of this model is largely motivated by the recent experimental observations of Brown and Roshko (1974). The model is based on the proposition that the turbulence of a fully developed two-dimensional incompressible mixing layer is in a state of quasi-equilibrium. The model is used to predict the second-order turbulence statistics of the flow including single-point turbulent Reynolds stress distribution, intensity of turbulent velocity components, rms turbulent pressure fluctuations, power spectra and two-point space-time correlation functions. It is shown that numerical results compare favorably with available experimental measurements.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Journal of Fluid Mechanics; 92; May 28
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  • 93
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    Scattering of emitted radiation from inhomogeneous and nonisothermal layers (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: A parametric study is performed for the exiting monochromatic intensities scattered from finite plane-parallel inhomogeneous layers that are driven solely by a distribution of thermal sources. Intensities are obtained by invariantly imbedding the standard and thermal scattering functions. The single-scattering albedo and the Henyey-Greenstein phase-function parameter are varied independently, and both linear and exponential profiles are considered. Linear temperature profiles are used, including temperature inversions. The resulting intensities, as a function of the direction cosine of propagation, are discussed from a remote-sensing point of view. For an isothermal and homogeneous medium, the gross characteristics of the exiting intensity, represented by its overall slope, mean value (magnitude), and an interior maximum value, can be related to the total optical depth, single-scattering albedo, and phase function, respectively. For a homogeneous medium, linearly decreasing (in the line of sight) temperature profiles tend to obscure the phase-function information and decrease the apparent optical depth. On the other hand, linearly increasing temperature profiles tend to retain phase-function information and increase the apparent optical depth. Temperature inversion profiles give intensities very similar to those for purely linear profiles.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Journal of Quantitative Spectroscopy and Radiative Transfer; 21; Mar. 197
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  • 94
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    Numerical results for the thermal scattering functions (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: A recent formulation in radiative transfer defined the thermal scattering functions that characterize radiative transfer from a general plane-parallel finite medium driven solely by an internal distribution of thermal sources. Exiting diffuse intensities are expressed as space convolutions of the thermal scattering functions with any thermal source distribution. A parametric study is presented to obtain the basic structure of these scattering functions. The independent variables of these azimuthally independent functions are the direction cosine and source location, while the parameters are the single-scattering albedo, total optical depth, and the asymmetry factor in the Henyey-Greenstein phase function. The basic functional trends are discussed by using various parametric plots, and selected results are given to allow numerical checks. The computational method is invariant imbedding.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Journal of Quantitative Spectroscopy and Radiative Transfer; 21; Mar. 197
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  • 95
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    Evaluation of subgrid-scale models using an accurately simulated turbulent flow (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: A calculation of periodic homogeneous isotropic turbulence is used to simulate the experimental decay of grid turbulence. The calculation is found to match the experiment in a number of important aspects and the computed flow field is then treated as a realization of a physical turbulent flow. From this flow, a calculation is conducted of the large eddy field and the various averages of the subgrid-scale turbulence that occur in the large eddy simulation equations. These quantities are compared with the predictions of the models that are usually applied in large eddy simulation. The results show that the terms which involve the large-scale field are accurately modeled but the subgrid-scale Reynolds stresses are only moderately well modeled. It is also possible to use the method to predict the constants of the models without reference to experiment. Attempts to find improved models have not met with success.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Journal of Fluid Mechanics; 91; Mar. 9
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  • 96
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    A relationship between maximum packing of particles and particle size (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Experimental data indicate that the volume fraction of particles in a packed bed (i.e. maximum packing) depends on particle size. One explanation for this is based on the idea that particle adhesion is the primary factor. In this paper, however, it is shown that entrainment and immobilization of liquid by the particles can also account for the facts.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Powder Technology; 22; 1979
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  • 97
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    Turbulent shear stresses in compressible boundary layers (1979)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Hot-wire anemometer measurements of turbulent shear stresses in a Mach 3 compressible boundary layer were performed in order to investigate the effects of heat transfer on turbulence. Measurements were obtained by an x-probe in a flat plate, zero pressure gradient, two dimensional boundary layer in a wind tunnel with wall to freestream temperature ratios of 0.94 and 0.71. The measured shear stress distributions are found to be in good agreement with previous results, supporting the contention that the shear stress distribution is essentially independent of Mach number and heat transfer for Mach numbers from incompressible to hypersonic and wall to freestream temperature ratios of 0.4 to 1.0. It is also found that corrections for frequency response limitations of the electronic equipment are necessary to determine the correct shear stress distribution, particularly at the walls.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: AIAA Journal; 17; July 197
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  • 98
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    Numerical modeling of two-dimensional confined flows (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A numerical model of two-dimensional confined flows is presented. The flow in the duct is partitioned into finite streams. The difference equations are then obtained by applying conservation principles directly to the individual streams. A listing of a computer code based on this approach in FORTRAN 4 language is presented. The code computes two dimensional compressible turbulent flows in ducts when the duct area along the flow is specified and the pressure gradient is unknown.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-162115 , ME-MG79-1
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  • 99
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    Two-phase choked flow of cryogenic fluids in converging-diverging nozzles (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Data are presented for the two phase choked flow of three cryogenic fluids - nitrogen, methane, and hydrogen - in four converging-diverging nozzles. The data cover a range of inlet stagnation conditions, all single phase, from well below to well above the thermodynamic critical conditions. In almost all cases the nozzle throat conditions were two phase. The results indicate that the choked flow rates were not very sensitive to nozzle geometry. However, the axial pressure profiles, especially the throat pressure and the point of vaporization, were very sensitive to both nozzle geometry and operating conditions. A modified Henry-Fauske model correlated all the choked flow rate data to within + or - 10 percent. Neither the equilibrium model nor the Henry-Fauske model predicted throat pressures well over the whole range of data. Above the thermodynamic critical temperature the homogeneous equilibrium model was preferred for both flow rate and pressure ratio. The data of the three fluids could be normalized by the principle of corresponding states.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-TP-1484 , E-9659
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  • 100
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    Review and status of liquid-cooling technology for gas turbines (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A review was conducted of liquid-cooled turbine technology. Selected liquid-cooled systems and methods are presented along with an assessment of the current technology status and requirements. A comprehensive bibliography is presented.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-RP-1038 , E-9517 , AVRADCOM-TR-78-21
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