空气动力学学报2012，Vol.30Issue(1)：80-85,6.
超声速高度欠膨胀冲击射流的大涡模拟
Large eddy simulation of highly under-expanded supersonic impinging jet
摘要
Abstract
The study of under-expanded supersonic impinging jet has been a popular subject not only because of its fundamental importance but also its practical importance in aerospace applications, such as Short Take-off and Vertical Landing(STOVL). In this paper, Large-Eddy Simulations (LES) of highly under-expanded supersonic jet impinging on large plate has been carried out. The numerical simulation successfully captures the shock wave structure in the jet plume and vortex structures with different scales in the internal and external shear layer and in the wall jet. The numerical results show the oscillation of the mach disk, and occurrence and disappearance of the annular shock in the peripheral supersonic flow during a period of oscillation. At the same time, through the numerical simulation, the evolution of the vortex in the internal shear layer has been observed. It can be seen that the formations of large-scale vortex structures associate with the oscillation of the Mach disk. Under the interaction of internal and external shear layer,the interlacing vortex structures in the wall jet are formed.关键词
冲击射流/大涡模拟/内剪切层/流场结构Key words
supersonic impinging jet/ large-eddy simulation/ flow structure/ shear layer分类
航空航天引用本文复制引用
刘海,姚朝晖..超声速高度欠膨胀冲击射流的大涡模拟[J].空气动力学学报,2012,30(1):80-85,6.基金项目
国家自然科学基金资助项目(项目批准号:10572074) （项目批准号:10572074）
