为了揭示斜爆轰的胞格结构,基于带化学反应的Euler方程,利用五阶WENO格式,对尖劈诱导的斜爆轰进行了数值模拟,分析了其非定常的波阵面结构.结果表明,斜爆轰波阵面被分为4个区域,依次是斜激波、类ZND结构、单三波点结构和双三波点结构.根据三波点的轨迹绘制了胞格结构,其中单三波点的轨迹为平行直线,而双三波点的轨迹为倾斜的鱼鳞状结构.如移除来流在斜爆轰波切向的分速度,得到斜爆轰法向的胞格结构,其横波间距小于正爆轰胞格的横波间距,这是由于斜爆轰波中横波是爆轰波,而正爆轰波中横波是激波.
Abstract
To study cell structure of oblique detonation wave,the phenomenon of wedge-induced oblique detonation wave was simulated numerically based on the reactive Euler equation by using 5-order WENO scheme,and the unsteady wave-front structure was analyzed.The numerical results show that the oblique detonation wave-front structure is divided into four sections:oblique shock,ZND(Zeldovich-von Neumann-Doering)model-like structure,single-headed triple point structure and dual-headed triple point structure.According to the triple point trace,different cell structures were obtained,in which the single-headed triple trace has the characteristics of parallel straight lines,and the dual-headed triple trace is inclining "fish scale" patterns.While ignoring the velocity component of the incoming flow on the tangent of the oblique detonation wave,the detonation cell symmetry axis is perpendicular to the oblique detonation front,and the width of cell is smaller than that of the normal detonation cell.It is because the transverse wave is the detonation wave in the former and is the shock wave in the latter.
关键词
斜爆轰波 /
单三波点结构 /
双三波点结构 /
胞格结构 /
数值研究
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Key words
oblique detonation wave /
single-headed triple point structure /
dual-headed triple point structure /
cell structure /
numerical study
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基金
国家自然科学基金项目(10872096);南京理工大学‘卓越计划’‘紫金之星’基金项目(AB41384)
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脚注
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