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  • Other Sources  (1,052)
  • AIRCRAFT PROPULSION AND POWER  (1,052)
  • 1980-1984  (1,052)
  • 1
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    Propulsion/ACEE (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The research objectives of the NASA aircraft energy efficiency program are summarized. Engine component improvements for turbofan engines, diagnostics, the development of advanced turboprop engines, and propeller noise analysis are discussed.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-FACTS-93/8-81
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    A simple propulsion system model for the simulation of nonlinear dynamic thrust response (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A simple mathematical jet engine description is presented where the measured transition functions of the engine thrust can be simulated in a quasi-stationary operation as well as in acceleration or deceleration schedules. Because of its simplicity and high fidelity, it is especially suited for representing jet engines in digital simulation programs.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-77053 , NAS 1.15:77053
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Non-destructive evaluation techniques, high temperature ceramic component parts for gas turbines (1984)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: This report concerns studies conducted on various tests undertaken on material without destroying the material. Tests included: microradiographic techniques, vibration analysis, high-frequency ultrasonic tests with the addition of evaluation of defects and structure through analysis of ultrasonic scattering data, microwave tests and analysis of sound emission.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-77755 , NAS 1.15:77755
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Comparison of combustion efficiencies for ramjet engines (1984)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Four different combustion efficiencies commonly used for assessing ramjet engines are compared. The mixture ratios cover a range from stoichiometric to an equivalence ratio of 0.2, and the polyethylene/air propellant system is used. The ratio of effective to ideal temperature rise is taken as reference efficiency. As might be expected, major differences can be observed near stoichiometric and down to equilvalence ratios of 0.5. These are quantitatively demonstrated.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-77749 , NAS 1.15:77749
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Growian rotor blades: Production development, construction and test (1984)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Development and construction of three 50 m rotor blades for a 3 MW wind turbine are described. A hybrid concept was chosen, i.e., a load carrying inflexible steel spar and a glass fiber reinforced plastic skin. A test blade was constructed and static loading tests, dynamic vibration tests and fatigue tests on critical welds as well as at the connection between spar and blade skin were performed. All test results show good accordance with calculated values, and were taken into consideration during the construction of two rotor blades.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-77479 , NAS 1.15:77479 , BMFT-FB-T-83-111
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Windmilling of the rotor of a turbojet engine with an axial-flow compressor under flight conditions (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The concept of rotor windmilling is understood to mean rotation of the rotor caused solely by the energy of the air (not gas) streaming through the apertures between the blades (under conditions of power shut-off) under the action of dynamic pressure. The concept of windmilling is analyzed for an engine with an axial-flow compressor, showing that windmilling must be taken into account in such cases as in-flight reignition of the engine. A graph-analytic method for determining the range of windmilling is proposed.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-77087 , NAS 1.15:77087
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Comparative evaluation of gas-turbine engine combustion chamber starting and stalling characteristics for mechanical and air-injection (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The effectiveness of propellant atomization with and without air injection in the combustion chamber nozzle of a gas turbine engine is studied. Test show that the startup and burning performance of these combustion chambers can be improved by using an injection during the mechanical propellant atomization process. It is shown that the operational range of combustion chambers can be extended to poorer propellant mixtures by combined air injection mechanical atomization of the propellant.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-77024 , NAS 1.15:77024
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Real-time simulation of jet engines with digital computer. 1: Fabrication and characteristics of the simulator (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The fabrication and performance of a real time jet engine simulator using a digital computer are discussed. The use of the simulator in developing the components and control system of a jet engine is described. Comparison of data from jet engine simulation tests with actual engine tests was conducted with good agreement.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-77081 , NAS 1.15:77081
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Airbreathing propulsion component technologies (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The article suggests that the 1980's will see significant improvements in virtually all gas-turbine engine components and their materials and structural design methods. These improvements will be made possible by improved theoretical models, laser Doppler measurement techniques, advances in rotor-spool technology, the evolution of engine controls, etc. It is suggested that the engine components field should expect broad and steady advances in the technologies of flow, materials, and structures in terms of scope, precision, and tools of design.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: Astronautics and Aeronautics; 18; June 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Conditions of generation and methods of damping the inlet vortex of a turbojet engine (1982)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: An aeromechanical analysis of the generation of an inlet vortex in a turbojet engine is presented. Methods for the prevention of vortex generation and methods of vortex damping are described.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-76678 , NAS 1.15:76678
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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