PROBLEMS OF SPACE AIR-BREATHING JET ENGINES.
ATD work assignment no. 76,
AEROSPACE TECHNOLOGY DIV LIBRARY OF CONGRESS WASHINGTON D C
Pagination or Media Count:
The paper presents the results of a thermodynamic investigation of an air-breathing jet engine ABJE in the 5-50 M range. It is intended to present general criteria for determining ABJE efficiency, i.e., to establish the ABJE thrust criteria, which would permit the determination of the engines thrust capacity at given initial parameters without using gas dynamic calculations. Formulas for ABJE thrust criteria are given and it is demonstrated that these engines may develop a positive thrust at space flight speeds, if heat and an additional mass are introduced into the engines air flow. The equivalence of the supplied mass of heat is established according to the engine thrust. It is demonstrated that the mass heat equivalent decreases as the flight speed increases. Calculated values of the specific impulse of an ABJE equipped with various types of diffusors at space flight speeds are given. The article is divided into six parts Introduction, Mechanical energy losses in an ABJE diffusor, Engine with a heat supply, Engine with heat and mass supply, Specific impulse of space air breathing jet engines, and Conclusions. The foremost conclusion is that the air-breathing jet engine, with heat and additional mass fed into the air flow, can develop a positive thrust at space flight speeds. Author
- Air Breathing Engines (Unconventional)
- Jet and Gas Turbine Engines