The mechanism of breakdown in laminar-turbulent transition of a supersonic boundary layer on a flat plate-temporal mode

被引：25
|
作者：
Huang, ZF
Cao, W
Zhou, H [1 ]
机构：
[1] Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China
[2] Nankai Univ, Liu Hui Ctr Appl Math, Tianjin 300072, Peoples R China
来源：
SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY | 2005年 / 48卷 / 05期
基金：
中国国家自然科学基金;
关键词：
supersonic boundary layer; transition; breakdown;
D O I：
10.1360/142005-19
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Temporal mode direction numerical simulation has been done for the transition of a supersonic boundary layer on a flat 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 disturbances, when they became larger, led to a 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.
引用
收藏
页码：614 / 625
页数：12
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