|Table of Contents|

Analysis on thermodynamic cycle characteristics of air-turbo-rocket engine(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2015年04期
Page:
48-54
Research Field:
研究与设计
Publishing date:

Info

Title:
Analysis on thermodynamic cycle characteristics of air-turbo-rocket engine
Author(s):
LI Wen-long;  GUO Hai-bo;  NAN Xiang-yi
Xi’an Aerospace Propulsion Institute, Xi’an 710100, China
Keywords:
air-turbo-rocket engine;  thermodynamic cycle;  ideal cycle work;  thermal efficiency
PACS:
V434-34
DOI:
-
Abstract:
The basic thermodynamic process of liquid propellant air-turbo-rocket (ATR) engine is analyzed with the first law analysis method of thermodynamics. The cycle work, thermal efficiency and specific impulse of the ideal ATR engine thermodynamic cycle were deducted through calculation of the energy balance. Furthermore, five thermodynamic characteristic parameters which might affect the ideal thermodynamic cycle performance were determined. The effects of these thermodynamic characteristic parameters on the performance of the engine thermodynamic cycle in the ground static state and flight state were analyzed. The results indicate that the increase of turbine expansion ratio, temperature ratios of gas generator and combustion chamber is helpful to the improvement of ATR thermodynamic cycle work and specific impulse, but the fuel specific impulse performance will be decreased while cycle work and thermal efficiency are increased if the compressor pressure ratio is increased; the ideal thermal efficiency increases incoming flow Mach number, whereas the thermodynamic cycle work and fuel specific impulse increase first, and then decrease with the increases of incoming flow Mach number.

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