Numerical Study on Effects of Expansion Wave on Wedge-Stabilized Oblique Detonation Wave

被引：0
|
作者：
Li Z.-M. [1 ]
Peng H. [2 ]
Luan Z.-Y. [1 ]
Long Z.-Y. [1 ]
Huang Y. [1 ]
You Y.-C. [1 ]
机构：
[1] School of Aerospace Engineering, Xiamen University, Xiamen
[2] School of Engineering, University of Southampton, Southampton
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2023年 / 44卷 / 10期
关键词：
Combustor; Decoupling; Expansion wave; Finite wedge; Oblique detonation wave;
D O I：
10.13675/j.cnki.tjjs.2211055
中图分类号：
学科分类号：
摘要：
In order to explore the effects of possible expansion waves in the combustor on the stable combustion of oblique detonation，based on the AMROC code with adaptive mesh refinement，the multi-component compressible reactive Euler equation was solved，and the effects of expansion wave on oblique detonation wave （ODW）induced by wedge were studied. It is found that in the case of infinite wedge，the angle of ODW increases slowly，and under the influence of expansion wave，the angle decreases significantly. The influence range of expansion wave and the attenuation degree of ODW can be clearly found in the figures of wave angle. The low static pressure of the inflow will not change the influence range of the expansion wave，but probably cause the attenuation of ODW until decoupling. Therefore，the stability and combustion efficiency of oblique detonation under the condition of high Mach number and low static pressure flow should be considered. In addition，Prandtl-Meyer expansion wave was used to analyze the expansion zone，and it is found that the flow field in the deflagration zone is in good agreement with the theoretical value，and the angle of forward Mach line near the wall is close to the angle of approximate expansion wave. Based on this，a qualitative evaluation method for the influence range of expansion wave at the end of wedge was developed. The front of expansion wave can be approximately obtained by adding 4°~10° to the angle of forward Mach line，which probably can be referred in the design of finite ODW combustor considering the influence of expansion wave. © 2023 Journal of Propulsion Technology. All rights reserved.
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