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  • Other Sources  (5)
  • 1975-1979  (5)
  • 1
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    Durability testing of advanced catalysts and catalyst supports for gas turbine engine combustors (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The paper presents new information on the durability of a CATCOM catalyst operating at low-emission combustion temperatures (about 1527 K) with a liquid fuel, No. 2 diesel. Information on the activity of No. 2 diesel after 1000 hr of aging is given. In addition, a unique in situ activity test developed for monitoring the subtle changes in the catalyst activity of the CATCOM catalyst is also detailed. The study demonstrated the feasibility of using a CATCOM catalyst in catalytically supported thermal combustion for extended operating periods
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: AIChE Symposium Series; 75; 188,; 1979
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Mean lives of some astrophysically important excited levels in carbon, nitrogen and oxygen (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A number of astrophysically important mean lives of levels in carbon, nitrogen and oxygen were measured with the beam-foil technique. New values are reported and compared with earlier theoretical and experimental values. Direct references to astrophysical applications are listed.
    Keywords: ASTROPHYSICS
    Type: NASA-CR-146853
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Durability testing at one atmosphere of advanced catalysts and catalyst supports for automotive gas turbine engine combustors, part 1 (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The durability of catalysts and catalyst supports in a combustion environment was experimentally demonstrated. A test of 1000 hours duration was completed with two catalysts, using diesel fuel and operating at catalytically supported thermal combustion conditions. The performance of the catalysts was determined by monitoring emissions throughout the test, and by examining the physical condition of the catalyst core at the conclusion of the test. The test catalysts proved to be capable of low emissions operation after 1000 hours diesel aging, with no apparent physical degradation of the catalyst support.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-CR-135132 , CONS-9416-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Mean lives of some astrophysically important excited levels in carbon, nitrogen, and oxygen (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A number of astrophysically important mean lives of levels in carbon, nitrogen, and oxygen have been measured with the beam-foil technique. New values are reported along with a comparison with earlier theoretical and experimental values. Direct references to astrophysical applications are listed.
    Keywords: ASTROPHYSICS
    Type: AD-A050799 , Astrophysical Journal; 211; Jan. 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Noise transmission - Turboprop problem (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: An analytical model is presented to predict low frequency (1000 Hz and below) noise transmission into aircraft. Noise transmission is determined by solving the acoustic wave equation for the interior noise field, the equivalent 'smeared' monocoque shell equation for overall fuselage vibrations and skin-stringer panel equation for local vibrations of panels and stringers. The solution to this system of equations is obtained by using a Galerkin-like procedure. The modes and frequencies for skin-stringer panels are determined by a transfer matrix method. Results include noise transmission through discretely stiffened panels and cabin noise due to turbulent boundary layer and propeller passage harmonics for a turboprop type aircraft.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 79-0645 , American Institute of Aeronautics and Astronautics, Aeroacoustics Conference; Mar 12, 1979 - Mar 14, 1979; Seattle, WA
    Format: text
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    NASA TECHNICAL REPORTS
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