The reliability of the improved e^N method for the transition prediction of boundary layers on a flat plate

作     者：SU CaiHong1,2 1 Department of Mechanics,Tianjin University,Tianjin 300072,China 2 Tianjin Key Laboratory of Modern Engineering Mechanics,Tianjin 300072,China 

作者机构：Department of Mechanics Tianjin University Tianjin China Tianjin Key Laboratory of Modern Engineering Mechanics Tianjin China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2012年第55卷第5期

页      面：837-843页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (Grant No.11002098) the National Basic Research Program of China (Grant No.2009CB724103) the Specialized Research Fund for the Doctoral Program of Higher Education 

主　　题：transition prediction boundary layer eN PSE 

摘      要：The transition criterion in the improved eN method is that transition would occur whenever the velocity amplitude of disturbance reaches 1%-2% of the free stream velocity,while in the conventional eN method,the N factor is an empirical *** this paper the reliability of this key assumption in the improved eN method is checked by results of transition prediction by using the Parabolized Stability Equations(PSE).Transition locations of an incompressible boundary layer and a hypersonic boundary layer at Mach number 6 on a flat plate are predicted by both the improved eN method and the PSE *** from both methods agree fairly well with each other,implying that the transition criterion proposed in the improved eN method is reliable.