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  • METEOROLOGY AND CLIMATOLOGY  (32)
  • Chemical Engineering  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Effects of bubbling and stirring on mass transfer coefficients in liquids (1957)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 3 (1957), S. 411-417 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In the hydrogenation of α-methylstyrene by means of a suspended palladium-alumina catalyst in a stirred reactor the mass transfer of hydrogen through the liquid is the rate-controlling step and the resistance to chemical reaction at the catalyst surface is negligible except at extremely rapid rates of stirring. This system therefore provides an excellent means of establishing the effects of operating variables and mechanical construction on mass transfer coefficients in liquids in stirred reactors. It is convenient to consider the total resistance to mass transfer as consisting of two separate resistaces: in the liquid adjoining the bubbles and in the liquid adjoining the suspended solid particles; thus R = Rb + Rs.A general equation was evaluated from experimental data based upon unit volume of liquid.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690030323
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Effects of radially nonuniform distributions of catalytic activity on performance of spherical catalyst pellets (1984)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 30 (1984), S. 44-50 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The performance of spherical catalyst pellets with radially nonuniform distributions of activity is simulated under parallel reaction networks closely resembling hydrocarbon oxidation reactions. Both reaction paths are assumed to be exothermic with the desired path exhibiting lower activation energy requirements than the undesired one. It is shown that nonuniform activity distributions enhance effectiveness and selectivity over a large range of values of the Thiele modulus. Multiple steady states in effectiveness and selectivity are observed for certain values of the heat of reaction parameter.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690300108
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Atmospheric environment for space shuttle (STS-51L) launch (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A summary is given of selected atmospheric conditions observed near Space Shuttle STS-51L launch time on January 28, 1986, at Kennedy Space Center, Florida. Values of ambient pressure, temperature, moisture, ground winds, visual observations (cloud), and winds aloft are included. The sequence of pre-launch Jimsphere measured vertical wind profiles is given. The final atmospheric tape, which consists of wind and thermodynamic parameters versus altitude, for STS-51L vehicle ascent has been constructed. The STS-51L ascent atmospheric data tape has been constructed by Marshall Space Flight Center's Atmospheric Sciences Division to provide an internally consistent data set for use in post flight performance assessments.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-86577 , NAS 1.15:86577
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Atmospheric environment for Space Shuttle (STS-51D) (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A summary of selected atmospheric conditions observed near the space shuttle STS-51D launch time on April 12, 1985, at Kennedy Space Center Florida is presented. Values of ambient pressure, temperature, moisture, ground winds, visual observations (cloud), and winds aloft are included. The sequence of prelaunch Jimsphere measured vertical wind profiles is given in this report. The final atmospheric tape, which consists of wind and thermodynamic parameters versus altitude, for STS-51D vehicle ascent is constructed. The STS-51D ascent atmospheric data tape is compiled by Marshall Space Flight Center's Atmospheric Sciences Division to provide an internally consistent data set for use in post-flight performance assessments.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-86524 , NAS 1.15:86524
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Atmospheric environment for Space Shuttle (STS-27) launch (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Selected articles on atmospheric conditions observed near Space Shuttle STS-27 launch time on December 2, 1988, at Kennedy Space Center, Florida are summarized. STS-27 carried a Department of Defense payload and the flight azimuth in this report will be denoted by reference flight azimuth, since the actual flight azimuth is not known. Values of ambient pressure, temperature, moisture, ground winds, visual observations (cloud), and winds aloft are included. The sequence of pre-launch Jimsphere-measured vertical wind profiles is given. The final atmospheric tape, which consists of wind and thermodynamic parameters versus altitude, for STS-27 vehicle ascent was constructed. The STS-27 ascent atmospheric data tape was constructed by Marshall Space Flight Center's Earth Science and Applications Division to provide an internally consistent data set for use in post-flight performance assessments.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-100370 , NAS 1.15:100370
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Remote sensing of mesospheric and thermospheric density perturbations induced by subtropical heavy rainfalls for spacecraft environment study (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The simultaneous measurements of VHF radar and HF Doppler array systems are used to observe three-dimensional wind speeds and gravity waves with the purpose of determining the density perturbations at different heights of mesosphere and thermosphere induced by the convective motions associated with subtropical heavy rainfall during the time period of the raining season. Frequency, horizontal wavelength, vertical wavelength, and phase velocity of the gravity waves are determined from the Fourier power spectral analysis of horizontal and vertical wind velocities. The results are compared with those of density perturbations caused by typhoons, tropical storms, and winter-time drizzles associated with convective motions. It is shown that the maximum amplitude of the density perturbations caused by the gravity waves is +/- 10 pct which is greater than that of density perturbations caused by gravity waves associated with weak convective motions in winter time and is smaller than that caused by the gravity waves associated with tropical storms.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: AIAA PAPER 91-0455
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    The NASA/MSFC global reference atmospheric model: 1990 version (GRAM-90). Part 2: Program/data listings (1991)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A new (1990) version of the NASA/MSFC Global Reference Atmospheric Model (GRAM-90) was completed and the program and key data base listing are presented. GRAM-90 incorporate extensive new data, mostly collected under the Middle Atmosphere Program, to produce a completely revised middle atmosphere model (20 to 120 km). At altitudes greater than 120 km, GRAM-90 uses the NASA Marshall Engineering Thermosphere model. Complete listings of all program and major data bases are presented. Also, a test case is included.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-4268-PT-2 , M-657 , NAS 1.15:4268-PT-2
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    The NASA/MSFC global reference atmospheric model: 1990 version (GRAM-90). Part 1: Technical/users manual (1991)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A technical description of the NASA/MSFC Global Reference Atmospheric Model 1990 version (GRAM-90) is presented with emphasis on the additions and new user's manual descriptions of the program operation aspects of the revised model. Some sample results for the new middle atmosphere section and comparisons with results from a three dimensional circulation model are provided. A programmer's manual with more details for those wishing to make their own GRAM program adaptations is also presented.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-4268-PT-1 , M-657 , NAS 1.15:4268-PT-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Atmospheric environment for space shuttle (STS-51B) launch (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A summary of selected atmospheric conditions observed near space shuttle STS-51B launch time on April 29, 1985, at Kennedy Space Center Florida is presented. Values of ambient pressure, temperature, moisture, ground winds, visual observations (cloud), and winds aloft are included. The sequence of prelaunch Jimsphere measured vertical wind profiles is given. The final atmospheric tape, which consists of wind and thermodynamic parameters versus altitude, for STS-51B vehicle ascent was constructed. The STS-51B ascent atmospheric data tape was constructed by Marshall Space Flight Center's Atmospheric Sciences Division to provide an internally consistent data set for use in post flight performance assessments.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-86525 , NAS 1.15:86525
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Atmospheric environment for space shuttle (STS-51C) launch (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Selected atmospheric conditions observed near space shuttle STS-51C launch time on January 24, 1985, at Kennedy Space Center, Florida are summarized. Values of ambient pressure, temperature, moisture, ground winds, visual observations (cloud), and winds aloft are included. The sequence of prelaunch Jimsphere measured vertical wind profiles are presented. The final atmospheric tape, which consists of wind and thermodynamic parameters versus altitude, for STS-51C vehicle ascent was constructed. The STS-51C ascent atmospheric data tape was constructed to provide an internally consistent data set for use in postflight performance assessments.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-86508 , NAS 1.15:86508
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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