EVOLUTION OF A 2-D DISTURBANCE IN A SUPERSONIC BOUNDARY LAYER AND THE GENERATION OF SHOCKLETS  

作　　者：黄章峰 周恒 

机构地区：[1]Department of Mechanics

出　　处：《Applied Mathematics and Mechanics(English Edition)》2004年第1期1-9,共9页应用数学和力学（英文版）

基　　金：theNationalNaturalScienceFoundationofChina (90 2 0 50 2 1 ) ;theFounda tionofLiuHuiCenterforApplied,MathematicsNankai&TianjinUniversit

摘　　要：Through direct numerical simulation,the evolution of a 2-D disturbance in a supersonic boundary layer has been investigated.At a chosen location,a small amplitude T-S wave was fed into the boundary layer to investigate its evolution. Characteristics of non-linear evolution have been found. Two methods were applied for the detection of shocklets,and it was found that when the amplitude of the disturbance reached a certain value, shocklets would be generated, which should be taken into consideration when nonlinear theory of hydrodynamic stability for compressible flows is to be established.Through direct numerical simulation,the evolution of a 2-D disturbance in a supersonic boundary layer has been investigated.At a chosen location,a small amplitude T-S wave was fed into the boundary layer to investigate its evolution. Characteristics of non-linear evolution have been found. Two methods were applied for the detection of shocklets,and it was found that when the amplitude of the disturbance reached a certain value, shocklets would be generated, which should be taken into consideration when nonlinear theory of hydrodynamic stability for compressible flows is to be established.

关 键 词：supersonic boundary layer evolution of disturbance SHOCKLET 

分 类 号：O426[理学—声学]