|Table of Contents|

Development history and parameter characteristic analysis of PATR engine(PDF)

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

Issue:
2023年06期
Page:
100-109
Research Field:
目次
Publishing date:

Info

Title:
Development history and parameter characteristic analysis of PATR engine
Author(s):
MA Haibo;  MA Yuan;  NAN Xiangyi;  ZHANG Mengzheng;  LIU Dianduo
Xi'an Aerospace Propulsion Institute, Xi'an 710100, China
Keywords:
PATR engine;  simulation calculation;  parameter influence;  operating characteristics;  heat capacity ratio
PACS:
V434
DOI:
-
Abstract:
The development history of PATR engine is briefly introduced and its innovation and optimization ideas are summarized.For the thermal cycle scheme of PATR engine, the influence of input parameters at the design point is analyzed, and the simulation calculation of trajectory characteristics, altitude characteristics and rotation speed characteristics are carried out.The results show that the heat capacity ratio has the most significant effect on the engine performance.With the heat capacity ratio increasing by 1%, the specific impulse decreases by 0.59% and the unit thrust increases by 0.39%.The isentropic efficiency of the air compressor and helium turbine, and the total pressure recovery coefficient at the air side of the precooler also have significant effects on the engine performance.The specific impulse increases by 0.12% and the unit thrust increases by 0.12% when the isentropic efficiency of the air compressor increases by 1%. In addition, the other parameters have relatively small effects on the engine performance.With the increase of flight Mach number, the specific impulse of PATR engine shows a downward trend, and the specific thrust decreases suddenly when the external duct starts working, and then remains basically unchanged.The increase of flight altitude will result in an increase for the specific impulse of the engine increases and a decrease in the specific thrust.When the engine speed decreases, both the specific impulse and specific thrust of the engine decrease, and the reduction when the internal duct and external duct work together is obviously smaller than that when the internal duct works alone.

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