A numerical investigation of the evolution of 2-D disturbances in hypersonic boundary layers and the effect on the flow structure due to the existence of shocklets  

作　　者：CAO Wei & ZHOU Heng Department of Mechanics,Tianjin University Liu Hui Center of Applied Mathematics,Nankai and Tianjin University,Tianjin 300072,China Correspondence should be addressed to Zhou Heng(email:hzhou 1 @ tju.edu.cn) 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2004年第2期244-255,共12页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.90205021).

摘　　要：The evolution of 2-D disturbances in hypersonic boundary layer with Mach number 6,8, and 10 was investigated numerically by three different numerical schemes. At the entrance, second mode T-S waves with different amplitudes were introduced, and the relation between the Mach number and the amplitude of the disturbance when shocklets started to appear was investigated. By comparing the disturbance velocity profiles with those provided by linear stability theory, the effects of shocklets on flow structures were also investigated.

关 键 词：HYPERSONIC BOUNDARY layers  T-S wave  shocklet  direct numerical simulation. 

分 类 号：O354[理学—流体力学]