Numerical Study on Structural Evolution and Transitional Criteria of Oblique Detonation Waves in Confined Space

doi:10.13675/j.cnki.tjjs.200758

Journal of Propulsion Technology ›› 2021, Vol. 42 ›› Issue (4): 738-744.DOI: 10.13675/j.cnki.tjjs.200758

• Basic Mechanism of Detonation • Previous Articles Next Articles

Numerical Study on Structural Evolution and Transitional Criteria of Oblique Detonation Waves in Confined Space

1.China State Key Laboratory of High-Temperature Gas Dynamics，Institute of Mechanics， Chinese Academy of Sciences，Beijing 100190，China;2.School of Engineering Science，University of Chinese Academy of Sciences，Beijing 100049，China

Online:2021-04-15 Published:2021-04-15

斜爆轰波系在受限空间内的演变及其临界条件的数值研究

彭俊^1,2，马嘉文^1,2，杨鹏飞^1,2，胡宗民^1,2

1.中国科学院力学研究所高温气体动力学国家重点实验室，北京 100190;2.中国科学院大学工程科学学院，北京 100049

作者简介:彭　俊，博士生，研究领域为激波相互作用与爆轰物理。E-mail：pengjun2@imech.ac.cn
基金资助:
国家自然科学基金（11672308；11532014）。

Abstract

Abstract: Numerical techniques for multi-species chemical reacting flows are applied to study the macrostructures of oblique detonation waves in confined space. The key features， the evolution of the overall wave structure， and the transitional criteria are analysed. The results show that with the increase of wedge angle， four structures appear in turn： shock-induced combustion， oblique detonation double regular reflection， Mach reflection in reflux zone， and wedge combustion. The simulations reveal three critical conditions of the compression angle for the maintenance of stable wave structures， i.e.， lower-critical， sub-critical， and upper critical conditions. In addition， the transition between regular and Mach reflections occurs during the evolution process of the macro wave structure.

Key words: Oblique detonation engine;Wave structure;Critical condition;Confined space;Shock reflection

摘要： 针对斜爆轰发动机简化模型，采用多组分基元化学反应流动数值模拟技术，数值分析了斜爆轰波系在受限空间内的宏观结构特征及其演变，并进一步分析了爆轰波系结构转变的临界条件。研究结果发现，随着楔面角度的增加，依次出现四种结构：激波诱导燃烧、斜爆轰波双规则反射、回流区马赫反射、楔面燃烧。对于稳定的波系结构，楔面压缩角同时存在下临界、亚临界以及超临界三种极限条件，在波系演变过程还伴随激波规则反射和马赫反射的转变。

关键词: 斜爆轰发动机;波系结构;临界条件;受限空间;激波反射

PENG Jun^1,2, MA Jia-wen^1,2, YANG Peng-fei^1,2, HU Zong-min^1,2. Numerical Study on Structural Evolution and Transitional Criteria of Oblique Detonation Waves in Confined Space[J]. Journal of Propulsion Technology, 2021, 42(4): 738-744.

彭俊，马嘉文，杨鹏飞，胡宗民. 斜爆轰波系在受限空间内的演变及其临界条件的数值研究[J]. 推进技术, 2021, 42(4): 738-744.

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Numerical Study on Structural Evolution and Transitional Criteria of Oblique Detonation Waves in Confined Space

斜爆轰波系在受限空间内的演变及其临界条件的数值研究

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