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  • Weitere Quellen  (30)
  • Seismology  (8)
  • Fluid Mechanics and Thermodynamics  (7)
  • FLUID MECHANICS AND HEAT TRANSFER  (5)
  • AERODYNAMICS  (4)
  • Deutschland  (3)
  • Pflanzenschädling  (3)
  • 42.75
  • Organic Chemistry
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  • 1950-1954  (30)
  • 1954  (30)
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  • 1950-1954  (30)
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  • 1
    facet.materialart.
    Unbekannt
    Effects of low - velocity layers (1954)
    In:  Geofisica Pura e Applicata, Los Angeles California, 1 p., California Institute of Technology Pasadena, vol. 28, no. 6, pp. 1-10, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1954
    Schlagwort(e): Low velocity layer ; Seismology
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 2
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    Unbekannt
    Slip direction in earthquakes calculated from observed ratios SH/SV (1954)
    In:  Bull. Geol. Soc. Am., Los Angeles California, 1 p., California Institute of Technology Pasadena, vol. 65, no. 6, pp. 1342, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1954
    Schlagwort(e): Seismology ; Source parameters ; Shear waves ; Polarization
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 3
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    Unbekannt
    Larger shocks of 1953 (1954)
    California Institute of Technology Pasadena
    In:  Seismological Laboratory Bulletin, Los Angeles California, 1 p., California Institute of Technology Pasadena, vol. 1953, no. 6, pp. 98, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1954
    Schlagwort(e): Earthquake catalog ; Seismology ; Seismicity
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 4
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    Unbekannt
    Low-velocity layers in the earth's mantle (1954)
    In:  Bull. Geol. Soc. Am., Los Angeles California, 1 p., California Institute of Technology Pasadena, vol. 65, no. 6, pp. 337-347, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1954
    Schlagwort(e): Low velocity layer ; Seismology
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 5
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    Unbekannt
    Seismicity of Southern California (1954)
    In:  Bull. California Division of Mines San Francisco, Luxembourg, National Academy of Sciences of the USA, vol. 170, no. 3-5, pp. 19-25, pp. B05311, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1954
    Schlagwort(e): Seismicity ; Seismology
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 6
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    Unbekannt
    Progress report, Seismological Laboratory, California Institute of Technology, 1953 (1954)
    In:  Trans. Am. Geophys. Union, Beijing, Pergamon, vol. 35, no. 3-4, pp. 979-987, pp. 1246
    Details
    Publikationsdatum: 1954
    Schlagwort(e): Seismology ; Project report/description ; EOS
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 7
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    Untersuchungen über das Ertragspotential der deutschen Waldlandschaften (1954)
    In:  AFJZ 125, Seite 153-159
    Details
    Publikationsdatum: 1954
    Beschreibung: Darstellung eines Klimaindexes mit direktem Bezug zu Holzzuwachs in Wäldern KATASTER-BESCHREIBUNG: Formel für Klimaindex der mit dem durchschnittlichen Gesamtzuwachs korreliert ist KATASTER-DETAIL: Delta T++: Tmj=2K (alle anderen Faktoren=konstant), dann Zuwachs sinkt um 7.5%; Delta Nied--: prozentualer Rückgang im Jahresniederschlag (alle anderen Faktoren=konstant), dann gleicher prozentualer Rückgang im Zuwachs; I=(P x pn x (Z - 60))/(Tmj - 10) x 92 x 100 (Tmj - mittlere Temperatur Mai – Juli P – jährliche Niederschlagssumme [mm] pn – Anzahl der Tage mit Niederschlag〉=0.1mm May - July Z - Anzahl der Tage ohne Frost (〉 0°))
    Schlagwort(e): Deutschland
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE INKA BB
  • 8
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    Zum Massenflug der Blattläuse (1954)
    In:  Gesunde Pflanzen 6; p.166-168
    Details
    Publikationsdatum: 1954
    Beschreibung: Der Autor erklärt das massenhafte Auftreten verschiedener Blattlausarten Ende Mai 1954 mit trockenem warmem Wetter und nennt 19°C Tagesmitteltemperatur und Schwachwindigkeit als Fluginitiator für die Blattläuse. KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Schlagwort(e): Berlin, Hannover, Bonn ; 1954 ; Pflanzenschädling ; Witterung
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE INKA BB
  • 9
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    Untersuchungen zur Bekämpfung der Rapsschädlinge. III. Zur Biologie und Bekämpfung des Kohlschotenrüßlers (Ceutorrhynchus assimilis Payk.) und der Kohlschotengallmücke (Dasyneura brassicae Winn.) (1954)
    In:  Nachrichtenblatt deutsch. Pflanzenschutzdienst, p. 128-135
    Details
    Publikationsdatum: 1954
    Beschreibung: Bericht über Untersuchungen zur Terminwahl für die Bekämpfung von Kohlschotenrüßler und Kohlschotengallmücke sowie Vergleiche der Ergebnisse mit der bisherigen Literatur KATASTER-BESCHREIBUNG: Einfluss der Temperatur auf das Auftreten des Kohlschotenrüßlers KATASTER-DETAIL: Delta T +: Tmit 〉 15°C, dann Erscheinen des Kohlschotenrüßlers
    Schlagwort(e): Sachsen-Anhalt ; 1952-1953 ; Pflanzenschädling ; Temperatur ; Raps
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE INKA BB
  • 10
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    Unbekannt
    Methoden zur Vorhersage von Phytophthora-Ausbrüchen (1954)
    In:  Zeitschrift für Acker- und Pflanzenbau 98, Heft 1; p.119-125
    Details
    Publikationsdatum: 1954
    Beschreibung: Berichte über Warndienste und Prognoseverfahren der kritischen Witterungsperiodes für Phytophthora infestans aus verschiedenen Ländern (Niederlande, England, Irland, Deutschland) werden zusammengefasst. Es wird beispielhaft auf eine andere Arbeit verwiesen, die die Befallsbedingungen für Krautfäule in Schleswig-Holstein beschreibt. Eine Regel aus klimatischen Parametern für die kritische Periode in Schleswig-Holstein wird rezitiert. Zudem wird eine Regel für das Nulldatum (Gefährdungsbeginn) aus der Literatur für Deutschland. KATASTER-BESCHREIBUNG: Regel für die kritische Periode bei Phytophthora infestans für Schleswig-Holstein. Regel für den Zeitpunkt des Nulldatums in Deutschland für 4 Sorten. KATASTER-DETAIL: Nulldatum liegt bei 800°C bzw. 1100°C Temperatursumme der Tagesmitteltemperaturen ab 1.April (für die Sorten Erstling & Sieglinde bzw. Bona & Flava). Kritische Periode -〉 2 Tage in Folge tmax 〉 23°C, tmin 〉= 10°C, Dampfdruck im Tagesmittel 〉 12mm, mittlere Bewölkung 〉= 5/10; diese Bedingungen treten nur auf, wenn der Warmsektor eines Tiefdruckgebietes über Schleswig-Holstein liegt und in diesem Warmsektor subtropische Luftmassen beobachtet werden.
    Schlagwort(e): Deutschland ; 1949-1953 ; Kartoffeln ; Pflanzenkrankheit ; Hackfrüchte
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE INKA BB
  • 11
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    Die Vergilbungskrankheit der Rübe (1954)
    In:  Mitteilungen aus der Biologischen Zentralanstalt für Land- und Forstwirtschaft Berlin-Dahlem, Heft 79
    Details
    Publikationsdatum: 1954
    Beschreibung: Zusammenfassender Bericht über die in den Jahren 1947-1952 in Westdeutschland durchgeführten Untersuchungen zur Epidemiologie, Verbreitung, wirtschaftlichen Bedeutung und Bekämpfung dieser Virose KATASTER-BESCHREIBUNG: Hauptbefallsgebiete sind solche, mit mildem Winterklima, in denen die langjährigen Mittelwerte des kältesten Monats Januar nicht unter 0°C abfallen; KATASTER-DETAIL: Delta T(Sommer)+ und Delta Nied (Sommer) -, dann Delta t(Individualentwicklung der Überträger)- und Massenentwicklung (der Überträger) +; Delta T(Sommer)+ und Delta Nied (Sommer)-, dann Vergilbungsschäden +; Delta T - und Delta Lichtintensität -, dann Wirkung des Virus -;
    Schlagwort(e): Westdeutschland ; 1947-1952 ; Infektionskrankheiten ; Ertrag ; Niederschlag ; Pflanzenkrankheit ; Pflanzenschädling ; Temperatur ; Trockenheit ; Wachstum ; Witterung ; Düngung
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE INKA BB
  • 12
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    Der Einfluß der Witterung auf das Auftreten der Kraut- und Knollenfäule (Phytophthora infestans (Mont.) de Bary) und die sich daraus ergebenden Möglichkeiten für die Einrichtung eines Warndienstes zur Durchführung prophylaktischer Maßnahmen (1954)
    In:  Wissenschaftliche Zeitschrift der Universität Rostock 4; p.47-66
    Details
    Publikationsdatum: 1954
    Beschreibung: Zunächst werden Kardinalwerte der verschiedenen Entwicklungsphasen von Phytophthora infestans aus der Literatur zusammengefasst. Im folgenden erfolgt ein Review über den Einfluß von Temperatur und Feuchte auf die Überwinterung, sowie den Einfluß des Windes auf die Verbreitung. KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Schlagwort(e): Deutschland ; 1949-1953 ; Kartoffeln ; Pflanzenkrankheit ; Hackfrüchte
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE INKA BB
  • 13
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    Study of the seismic waves SKS and SKKS (1954)
    In:  Bull. Seism. Soc. Am., Tokyo, Railway Tech. Res. Inst., vol. 44, no. 4, pp. 39-56, pp. L06615, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1954
    Schlagwort(e): Waves ; Seismology ; earth Core ; Travel time ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 14
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    Seismicity of the Earth and Associated Phenomena (1954)
    Princeton Univ. Press
    In:  Princeton, New Jersey, 9 + 310 pp., Princeton Univ. Press, vol. 7, no. XVI:, pp. 385-389, (ISBN 0-12-305355-2)
    Details
    Publikationsdatum: 1954
    Schlagwort(e): Textbook of geophysics ; Seismology ; Seismicity
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 15
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    Impingement of Water Droplets on an Ellipsoid with Fineness Ration 10 in Axisymmetric Flow (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The presence of radomes and instruments that are sensitive to water films or ice formations in the nose section of all-weather aircraft and missiles necessitates a knowledge of the droplet impingement characteristics of bodies of revolution. Because it is possible to approximate many of these bodies with an ellipsoid of revolution, droplet trajectories about an ellipsoid of revolution with a fineness ratio of 10 were computed for incompressible axisymmetric air flow. From the computed droplet trajectories, the following impingement characteristics of the ellipsoid surface were obtained and are presented in terms of dimensionless parameters: (1) total rate of water impingement, (2) extent of droplet impingement zone, and (3) local rate of water impingement. These impingement characteristics are compared briefly with those previously reported for an ellipsoid of revolution with a fineness ratio of 5.
    Schlagwort(e): Fluid Mechanics and Thermodynamics
    Materialart: NACA-TN-3147
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 16
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    Investigation of the Jet Effects on a Flat Surface Downstream of the Exit of a Simulated Turbojet Nacelle at a Free-Stream Mach Number of 2.02 (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: An investigation at a free-stream Mach number of 2.02 was made to determine the effects of a propulsive jet on a wing surface located in the vicinity of a choked convergent nozzle. Static-pressure surveys were made on a flat surface that was located in the vicinity of the propulsive jet. The nozzle was operated over a range of exit pressure ratios at different fixed vertical distances from the flat surface. Within the scope of this investigation, it was found that shock waves, formed in the external flow because of the presence of the propulsive jet, impinged on the flat surface and greatly altered the pressure distribution. An integration of this pressure distribution, with the location of the propulsive jet exit varied from 1.450 propulsive-jet exit diameters to 3.392 propulsive-jet exit diameters below the wing, resulted in an incremental lift for all jet locations that was equal to the gross thrust at an exit pressure ratio of 2.86. This incremental lift increased with increase in exit pressure ratio, but not so rapidly as the thrust increased, and was approximately constant at any given exit pressure ratio.
    Schlagwort(e): Fluid Mechanics and Thermodynamics
    Materialart: NACA-RM-L54E05a
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 17
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    Aerodynamic forces, moments, and stability derivatives for slender bodies of general cross section (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Schlagwort(e): AERODYNAMICS
    Materialart: NACA-TN-3283
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 18
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    Impingement of Water Droplets on NACA 65A004 Airfoil at 8 deg Angle of Attack (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The trajectories of droplets in the air flowing past an NACA 65AO04 airfoil at an angle of attack of 8 deg were determined.. The amount of water in droplet form impinging on the airfoil, the area of droplet impingement, and the rate of droplet impingement per unit area on the airfoil surface were calculated from the trajectories and presented to cover a large range of flight and atmospheric conditions. These impingement characteristics are compared briefly with those previously reported for the same airfoil at an angle of attack of 4 deg.
    Schlagwort(e): FLUID MECHANICS AND HEAT TRANSFER
    Materialart: NACA-TN-3155
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 19
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    Effect of Ice Formations on Section Drag of Swept NACA 63A-009 Airfoil with Partial-Span Leading-Edge Slat for Various Modes of Thermal Ice Protection (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The effects of primary and runback ice formations on the section drag of a 36 deg swept NACA 63A-009 airfoil section with a partial-span leading-edge slat were studied over a range of angles of attack from 2 to 8 deg and airspeeds up to 260 miles per hour for icing conditions with liquid-water contents ranging from 0.39 to 1.23 grams per cubic meter and datum air temperatures from 10 to 25 F. The results with slat retracted showed that glaze-ice formations caused large and rapid increases in section drag coefficient and that the rate of change in section drag coefficient for the swept 63A-009 airfoil was about 2-1 times that for an unswept 651-212 airfoil. Removal of the primary ice formations by cyclic de-icing caused the drag to return almost to the bare-airfoil drag value. A comprehensive study of the slat icing and de-icing characteristics was prevented by limitations of the heating system and wake interference caused by the slat tracks and hot-gas supply duct to the slat. In general, the studies showed that icing on a thin swept airfoil will result in more detrimental aerodynamic characteristics than on a thick unswept airfoil.
    Schlagwort(e): AERODYNAMICS
    Materialart: NACA-RM-E53J30
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 20
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    Variation of Local Liquid-Water Concentration About and Ellipsoid of Fineness Ratio 5 Moving in a Droplet Field (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Trajectories of water droplets about an ellipsoid of revolution with a fineness ratio of 5 (which often approximates the shape of an aircraft fuselage or missile) were computed with the aid of a differential analyzer. Analyses of these trajectories indicate that the local concentration of liquid water at various points about an ellipsoid in flight through a droplet field varies considerably and under some conditions may be several times the free-stream concentration. Curves of the local concentration factor as a function of spatial position were obtained and are presented in terms of dimensionless parameters Re(sub 0) (free-stream Reynolds number) and K (inertia), which contain flight and atmospheric conditions. These curves show that the local concentration factor at any point is very sensitive to change in the dimensionless parameters Re(sub 0) and K. These data indicate that the expected local concentration factors should be considered when choosing the location of, or when determining antiicing heat requirements for, water- or ice-sensitive devices that protrude into the stream from an aircraft fuselage or missile. Similarly, the concentration factor should be considered when choosing the location on an aircraft of instruments that measure liquid-water content or droplet-size distribution in the atmosphere.
    Schlagwort(e): FLUID MECHANICS AND HEAT TRANSFER
    Materialart: NACA-TN-3153
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 21
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    Impingement of water droplets on wedges and double-wedge airfoils at supersonic speeds (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Schlagwort(e): FLUID MECHANICS AND HEAT TRANSFER
    Materialart: NACA-TR-1159
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 22
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    Experimental Investigation of Sublimation of Ice at Subsonic and Supersonic Speeds and Its Relation to Heat Transfer (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: An experimental investigation was conducted in a 3.84- by 10-inch tunnel to determine the mass transfer by sublimation, heat transfer, and skin friction for an iced surface on a flat plate for Mach numbers of 0.4, 0.6, and 0.8 and pressure altitudes to 30,000 feet. Measurements of rates of sublimation were also made for a Mach number of 1.3 at a pressure altitude of 30,000 feet. The results show that the parameters of sublimation and heat transfer were 40 to 50 percent greater for an iced surface than was the bare-plate heat-transfer parameter. For iced surfaces of equivalent roughness, the ratio of sublimation to heat-transfer parameters was found to be 0.90. The sublimation data obtained at a Mach number of 1.3 showed no appreciable deviation from that obtained at subsonic speeds. The data obtained indicate that sublimation as a means of removing ice formations of appreciable thickness is usually too slow to be of mach value in the de-icing of aircraft at high altitudes.
    Schlagwort(e): FLUID MECHANICS AND HEAT TRANSFER
    Materialart: NACA-TN-3104
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 23
    facet.materialart.
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    Impingement of Water Droplets on an Ellipsoid with Fineness Ratio 5 in Axisymmetric Flow (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The presence of radomes and instruments that are sensitive to water films or ice formations in the nose section of all-weather aircraft and missiles necessitates a knowledge of the droplet impingement characteristics of bodies of revolution. Because it is possible to approximate many of these bodies with an ellipsoid of revolution, droplet trajectories about an ellipsoid of revolution with a fineness ratio of 5 were computed for incompressible axisymmetric air flow. From the computed droplet trajectories, the following impingement characteristics of the ellipsoid surface were obtained and are presented in terms of dimensionless parameters: (1) total rate of water impingement, (2) extent of droplet impingement zone, (3) distribution of impinging water, and (4) local rate of water impingement.
    Schlagwort(e): FLUID MECHANICS AND HEAT TRANSFER
    Materialart: NACA-TN-3099
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 24
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    A flight investigation of the practical problems associated with porous-leading-edge suction (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TM-79864 , NACA-TN-3062
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 25
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    A theoretical study of the effect of forward speed on the free-space sound-pressure field around propellers (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TM-79844 , NACA-TR-1198 , NACA-TN-3018
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 26
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    Experimental Determination of Linear Dynamics of Two-Spool Turbojet Engines (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-12
    Beschreibung: Transfer functions descriptive of the response of most engine variables were determined from transient data that were obtained from approximate step inputs in fuel flow and in exhaust-nozzle area. The speed responses of both spools to fuel flow and to turbine-inlet temperature appeared as identical first-order lags. Response to exhaust-nozzle area was characterized by a first-order lag response of the outer-spool speed, accompanied by virtually no change in inner-spool speed.
    Schlagwort(e): Fluid Mechanics and Thermodynamics
    Materialart: NACA-RM-E54J11
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 27
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    Wind-Tunnel Investigation at Subsonic and Supersonic Speeds of a Fighter Model Employing a Low-aspect-ratio Unswept Wing and a Horizontal Tail Mounted Well above the Wing Plane - Lateral and Directional Stability (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-12
    Beschreibung: The static lateral- and directional-stability characteristics of a high-speed fighter-type airplane, obtained from wind-tunnel tests of a model, are presented. The model consisted of a thin, unswept wing of aspect ratio 2.3 and taper ratio 0.385, a body, and a horizontal tail mounted in a high position on a vertical tail. Rolling-moment, yawing moment, and cross-wind-force coefficients are presented for a range of sideslip angles of -5 deg. to +5 deg, for Mach numbers of 0.90, 1.45, and 1.90. Data are presented which show the effects on the lateral and directional stability of: (1) component parts of the complete model, (2) modification of the empennage so as to provide different heights of the horizontal tail above the wing plane, (3) angle of attack, and (4) dihedral of the wing.
    Schlagwort(e): Fluid Mechanics and Thermodynamics
    Materialart: NACA-RM-SA54H26b
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 28
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    Preliminary Data on the Effects of Inlet Pressure Distortions on the J57-P-1 Turbojet Engine (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-12
    Beschreibung: An investigation to determine the steady-state and surge characteristics of the J57-P-1 two-spool turbojet engine with various inlet air-flow distortions was conducted in the altitude wind tunnel at the NACA Lewis laboratory. Along with a uniform inlet total-pressure distribution, one circumferential and three radial pressure distortions were investigated. Data were obtained over a complete range of compressor speeds both with and without intercompressor air bleed at a flight Mach number of 0.8 and at altitudes of 35,000 and 50,000 feet. Total-pressure distortions of the magnitudes investigated had very little effect on the steady-state operating line for either the outer or inner compressor. The small radial distortions investigated also had engine over that obtained with the uniform inlet pressure distribution. The circumferential distortion, however, raised the minimum speed at which the engine could operate without encountering surge when the intercompressor bleeds were closed. This increase in minimum speed resulted in a substantial reduction in the operable speed range accompanied by a reduction in the altitude operating limit.
    Schlagwort(e): Fluid Mechanics and Thermodynamics
    Materialart: NACA-RM-SE54K19
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 29
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    Preliminary Altitude Performance Data of J71-A2 Turbojet Engine Afterburner (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-12
    Beschreibung: The performance and operational characteristics of the J71-A2 turbojet-engine afterburner were investigated for a range of altitudes from 23,000 to 60,000 feet at a flight Mach number of 0,9 and at flight Mach numbers of 0.6, 0.9, and 1.0 at an altitude of 45,000 feet. The combustion performance and altitude operational limits, as well as the altitude starting characteristics have been determined.
    Schlagwort(e): Fluid Mechanics and Thermodynamics
    Materialart: NACA-RM-SE54J06
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 30
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    Performance of 15-Stage Experimental J71 Axial-Flow Compressor: II - Individual Stage Performance Characteristics (1954)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-12
    Beschreibung: The first four stages were found to cause a major part of the poor low-speed efficiency of this compressor. The low design-speed over-all pressure ratio at surge was caused by the first and the twelfth to fifteenth stages. The multiple over-all performance curves in the intermediate-speed range were at least partly the result of double-branched characteristic curves for the third and seventh stages.
    Schlagwort(e): Fluid Mechanics and Thermodynamics
    Materialart: NACA-RM-SE54J19
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
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