双管爆轰单引射增推机理的数值研究

张焕好; 陈志华; 孙晓晖

双管爆轰单引射增推机理的数值研究

南京理工大学瞬态物理国家重点实验室,南京 210094

基金项目: 国家重点实验室基金(9140C3004050802)

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出版历程
- 收稿日期: 2010-04-20
- 修回日期: 2010-05-24
- 刊出日期: 2011-05-28

Numerical investigations on thrust augmentation mechanism of single ejection driven by two detonation tubes

National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China

摘要

摘要: 基于二维Euler方程,结合高精度Roe/HLL(Harten-Lax-Van Leer)混合格式与自适应网格加密技术,对引射模态下的双管爆轰非定常单次引射复杂流场进行了数值模拟.结果分别描述了方管爆轰波喷出及引射管内二次爆轰波的传播过程.双爆轰波喷出爆轰管后,以欠膨胀射流形式向外传播,同时,它们相互作用延长了引射管尾气排出时间,减少了引射管内环境气流吸进量,从而降低了双管爆轰引射效率,并与相关实验研究结果相符.
- 非定常引射 /
- 超声速引射 /
- 爆轰 /
- 燃烧 /
- 数值模拟
Abstract: Based on two-dimensional Euler equations,and in combination with the high-resolution hybrid Roe/HLL (Harten-Lax-Van Leer) scheme and adaptive mesh refinement method,numerical simulations of single ejection driven by two pulse detonation engines (PDE) were performed.The results show the propagation processes of the ejection of the primary detonation and the secondary detonation induced inside the ejector.After two detonation waves are ejected out,they propagate in the form of unexpanded jet flow,and interact with each other at the same time,postponing the ejection time of the exhausted gases and decreasing the absorption time of ambient air.As a result,the ejection efficiency of the ejector decreases,and the numerical results agree well with corresponding experimental results.
- unsteady ejection /
- supersonic ejection /
- detonation /
- combustion /
- numerical simulation

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参考文献(16)

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