作　　者： ; ; ;

机构地区： 南京理工大学动力工程学院瞬态物理国家重点实验室

出　　处： 《航空动力学报》 2011年第5期1025-1030,共6页

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. Based on two-dimensional Euler equations, and in combination with the highresolution 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.

关 键 词： 非定常引射 超声速引射 爆轰 燃烧 数值模拟

领　　域： [理学] [理学]