Self-consistent parabolized stability equation(PSE) method for compressible boundary layer  

作　　者：Yongming ZHANG Caihong SU 

机构地区：[1]Department of Mechanics,Tianjin University [2]Tianjin Key Laboratory of Modern Engineering Mechanics,Tianjin University

出　　处：《Applied Mathematics and Mechanics(English Edition)》2015年第7期835-846,共12页应用数学和力学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11202147,11472188,11332007,11172203,and 91216111);the Specialized Research Fund(New Teacher Class)for the Doctoral Program of Higher Education(No.20120032120007)

摘　　要：The parabolized stability equation （PSE） method has been proven to be a useful and convenient tool for the investigation of the stability and transition problems of boundary layers. However, in its original formulation, for nonlinear problems, the complex wave number of each Fourier mode is determined by the so-called phase-locked rule, which results in non-self-consistency in the wave numbers. In this paper, a modification is proposed to make it self-consistent. The main idea is that, instead of allowing wave numbers to be complex, all wave numbers are kept real, and the growth or decay of each mode is simply manifested in the growth or decay of the modulus of its shape function. The validity of the new formulation is illustrated by comparing the results with those from the corresponding direct numerical simulation （DNS） as applied to a problem of compressible boundary layer with Mach number 6.The parabolized stability equation （PSE） method has been proven to be a useful and convenient tool for the investigation of the stability and transition problems of boundary layers. However, in its original formulation, for nonlinear problems, the complex wave number of each Fourier mode is determined by the so-called phase-locked rule, which results in non-self-consistency in the wave numbers. In this paper, a modification is proposed to make it self-consistent. The main idea is that, instead of allowing wave numbers to be complex, all wave numbers are kept real, and the growth or decay of each mode is simply manifested in the growth or decay of the modulus of its shape function. The validity of the new formulation is illustrated by comparing the results with those from the corresponding direct numerical simulation （DNS） as applied to a problem of compressible boundary layer with Mach number 6.

关 键 词：parabolized stability equation （PSE） boundary layer direct numericalsimulation （DNS） SELF-CONSISTENT 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]