NUMERICAL INVESTIGATION OF EVOLUTION OF DISTURBANCES IN SUPERSONIC SHARP CONE BOUNDARY LAYERS  

作　　者：董明 罗纪生 曹伟 

机构地区：[1]Department of Mechanics Tianjin University,Tianjin 300072,P.R. China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2006年第6期713-719,共7页应用数学和力学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Nos. 10232020 and 90205021)the Special Foundation for the Authors of National Excellent Doctoral Dissertations (No.200328)

摘　　要：The spatial evolution of 2-D disturbances in supersonic sharp cone boundary layers was investigated by direct numerical simulation （DNS） in high order compact difference scheme. The results suggested that, although the normal velocity in the sharp cone boundary layer was not small, the evolution of amplitude and phase for small amplitude disturbances would be well in accordance with the results obtained by the linear stability theory （LST） which supposes the flow was parallel. The evolution of some finite amplitude disturbances was also investigated, and the characteristic of the evolution was shown. Shocklets were also found when the amplitude of disturbances increased over some value.The spatial evolution of 2-D disturbances in supersonic sharp cone boundary layers was investigated by direct numerical simulation （DNS） in high order compact difference scheme. The results suggested that, although the normal velocity in the sharp cone boundary layer was not small, the evolution of amplitude and phase for small amplitude disturbances would be well in accordance with the results obtained by the linear stability theory （LST） which supposes the flow was parallel. The evolution of some finite amplitude disturbances was also investigated, and the characteristic of the evolution was shown. Shocklets were also found when the amplitude of disturbances increased over some value.

关 键 词：supersonic sharp cone boundary layers DISTURBANCE direct numerical simulation SHOCKLET 

分 类 号：O357.41[理学—流体力学]