|Table of Contents|

Simulation on flow field in isolator of RBCC engine with different configurations(PDF)

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

Issue:
2023年06期
Page:
82-89
Research Field:
目次
Publishing date:

Info

Title:
Simulation on flow field in isolator of RBCC engine with different configurations
Author(s):
WANG Zhuang;  LI Yuhang;  ZHANG Mengzheng;  NAN Xiangjun
Science and Technology on Liquid Rocket Engine Laboratory,Xi'an Aerospace Propulsion Institute, Xi'an 710100, China
Keywords:
RBCC engine;  isolator;  kerosene combustion;  numerical simulation;  engine performance
PACS:
V435
DOI:
-
Abstract:
To explore the impact of elliptical slightly-expanded isolator and square to circular variable cross-section isolator on the thrust performance of RBCC engine, a RBCC test piece with a certain configuration was taken as the research object.The accuracy of the numerical scheme is verified by comparing the static pressure distribution on the centerline of the lower wall between the experimental results and the numerical simulation results, and it shows the numerical scheme is reliable.When the inlet flow Mach number is 3, the excess air coefficient is 1.5, the flow field and combustion process structure of the two different RBCC isolators are analyzed, as well as the thrust performance of the engine.The results show that the anti-backpressure ability of variable cross-section isolator is significantly lower than that of elliptical slightly-expanded isolator.And when the heat release from the fuel is relatively concentrated and the pressure in the combustion chamber increases relatively large, a large flow separation zone will be generated at the lower wall of variable cross-section isolator, which extends to the downstream.And it will make the flow field uniformity of the chamber worse, which will result in the poor thrust performance.

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