Hypersonic transition induced by three isolated roughness elements on a flat plate!

被引：16

作者：

Duan, Zhiwei ^{[1
]}

Xiao, Zhixiang ^{[1
]}

机构：

[1] Tsinghua Univ, Sch Aerosp Engn, Beijing 100084, Peoples R China

来源：

COMPUTERS & FLUIDS | 2017年 / 157卷

基金：

中国博士后科学基金; 美国国家科学基金会;

关键词：

Hypersonic; Roughness induced transition; Boundary layer; BOUNDARY-LAYER-TRANSITION;

D O I：

10.1016/j.compfluid.2017.08.006

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Hypersonic boundary layer transition from laminar to turbulent induced by three isolated roughness elements (ramp, diamond, and cylinder) was investigated by direct numerical simulations based on finite volume formulation with high order MDCD scheme. The effects of roughness shape on the transition mechanism, aerodynamic and aero-thermodynamic performances were quantitatively compared. The transition is dominated by three-dimensional shear layer instability and the streamwise transition locations are almost the same for all three roughness elements. The width of turbulent wake, the drag increment and the heat flux are the largest for cylinder. At the same time, the turbulent wake is the narrowest and drag and heat flux are the lowest for the ramp. (C) 2017 Published by Elsevier Ltd.

引用

页码：1 / 13

页数：13

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