The Effect of Mach Number on Turbulence Behaviors in Compressible Boundary Layers  

作　　者：WANG Li LU Xi-Yun 汪利;陆夕云(Department of Modern Mechanics,University of Science and Technology of China,Hefei 230026)

机构地区：[1]Department of Modern Mechanics,University of Science and Technology of China,Hefei 230026

出　　处：《Chinese Physics Letters》2011年第6期190-193,共4页中国物理快报（英文版）

基　　金：by the National Natural Science Foundation of China(No 11072236);the 111 Project(No B07033);the Funda-mental Research Funds for the Central Universities(No WK2090050007).

摘　　要：The effects of Mach number on turbulence behaviors are investigated by means of direct numerical simulation of compressible turbulent boundary layers with the free-stream Mach numbers 2,4 and 6.Some typical turbulent quantities,including the velocity and vorticity fluctuations,intermittency,sweep and ejection events and turbulent kinetic energy budget,are analyzed.The turbulence intensities are significantly decreased with the increasing Mach number.The onset of intrinsic intermittency occurs nearer the wall for a higher Mach number.The ejection event is more frequent and the sweep event becomes less frequent.Moreover,the magnitudes of turbulent kinetic energy production,diffusion and transport terms are increased and the solenoidal dissipation is slightly decreased as the Mach number is increased.

关 键 词：TURBULENT TURBULENCE QUANTITIES 

分 类 号：O35[理学—流体力学]