|Table of Contents|

Thermodynamic cycle analysis of RBCC engine rocket and rocket-scramjet mode(PDF)

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

Issue:
2023年05期
Page:
39-45
Research Field:
目次
Publishing date:

Info

Title:
Thermodynamic cycle analysis of RBCC engine rocket and rocket-scramjet mode
Author(s):
NAN Xiangjun1;  LI Bin1;  HE Guoqiang2
(1.Academy of Aerospace Propulsion Technology, Xi'an 710100, China; 2.Northwestern Polytechnical University, Xi'an 710072, China)
Keywords:
RBCC engine;  rocket mode;  thermodynamic cycle;  exergy analysis;  one-dimensional analysis
PACS:
V231
DOI:
-
Abstract:
Based on the ground free-jet test results, a performance analysis model of rocket and rocket-scramjet mode of RBCC engine was established by using one-dimensional aerodynamics theory. Then the engine test data at Mach 6 was processed and the flow parameters along the engine axis were obtained, wihle the thermodynamic cycle, work efficiency, exergy distribution and exergy components of each part were analyzed. Results proves the high accuracy of the established energy calculation model, and the thrust error between 1-D calculation and test results is less than 5%. In rocket-scramjet mode, the introduction of rocket gas can effectively improve the thermal cycle efficiency of the engine by about 20%, while it has little effect on the exergy generation rate and effective energy distribution ratio. The main reason for a thrust gain of 29% under rocket mode is that the energy of rocket gas is added to the scramjet flow tube, which forms an effective thermal cycle in the scramjet flow tube and produces a certain mechanical energy increment.

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