STUDY OF MECHANISM OF BREAKDOWN IN LAMINARTURBULENT TRANSITION OF SUPERSONIC BOUNDARY LAYER ON FLAT PLATE

作     者：曹伟 黄章峰 周恒 

作者机构：Department of Mechanics Tianjin UniversityTianjin 300072P. R. China Liuhui Center of Applied MathematicsNankai University and Tianjin UniversityTianjin 300072P. R. China 

出 版 物：《Applied Mathematics and Mechanics(English Edition)》 (应用数学和力学（英文版）)

年 卷 期：2006年第27卷第4期

页      面：425-434页

核心收录：

学科分类：08[工学] 080103[工学-流体力学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China (No.90205021)the Special Foundation for Doctoral Dissertations Research (No.200328)the Science Foundation of Liuhui Center of Applied Mathematics  Nankai University and Tianjin University 

主　　题：supersonic boundary layer transition breakdown spatial mode 

摘      要：Spatial mode direct numerical simulation has been applied to study the mechanism of breakdown in laminar-turbulent transition of a supersonic boundary layer on a fiat plate with Mach number 4.5. Analysis of the result showed that, during the breakdown process in laminar-turbulent transition, the mechanism causing the mean flow profile to evolve swiftly from laminar to turbulent was that the modification of mean flow profile by the disturbance, when they became larger, leads to remarkable change of its stability characteristics. Though the most unstable T-S wave was of second mode for laminar flow, the first mode waves played the key role in the breakdown process in laminar-turbulent transition.