The New Mode of Instability in Viscous High-Speed Boundary Layer Flows

被引：0
|
作者：
Ren, Jie [1 ,2 ]
Xi, Youcheng [1 ]
Fu, Song [1 ]
机构：
[1] Tsinghua Univ, Sch Aerosp Engn, Beijing 100084, Peoples R China
[2] Delft Univ Technol, Proc & Energy Dept, Leeghwaterstr 39, NL-2628 CB Delft, Netherlands
来源：
ADVANCES IN APPLIED MATHEMATICS AND MECHANICS | 2018年 / 10卷 / 05期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Boundary layer stability; compressible boundary layers; high-speed flow; PRESSURE-GRADIENT; TRANSITION; STABILITY; RECEPTIVITY;
D O I：
10.4208/aamm.OA-2017-0298
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
The new mode of instability found by Tunney et al. [24] is studied with viscous stability theory in this article. When the high-speed boundary layer is subject to certain values of favorable pressure gradient and wall heating, a new mode becomes unstable due to the appearance of the streamwise velocity overshoot (U(y)> U-infinity) in the base flow. The present study shows that under practical Reynolds numbers, the new mode can hardly co-exist with the conventional first mode and Mack's second mode. Due to the requirement for additional wall heating, the new mode may only lead to laminar-turbulent transition under experimental (artificial) conditions.
引用
收藏
页码：1057 / 1068
页数：12
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