Numerical investigation of shock wave/boundary layer interactions near a convex corner

WANG Dexin; CHU Youbiao; LIU Nansheng; LI Zhufei; YANG Jiming

doi:10.7638/kqdlxxb-2019.0111

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Numerical investigation of shock wave/boundary layer interactions near a convex corner

更新时间：2026-05-28

- Numerical investigation of shock wave/boundary layer interactions near a convex corner
- Vol. 38, Issue 1, Pages: 148-159(2020)
- 作者机构：
  
  1. 中国航天科技集团有限公司四院四十一所,陕西,西安,710025
  2. 中国科学技术大学近代力学系,安徽,合肥,230027
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2019.0111
  CLC： V211.3
- Published：2020
- 稿件说明：
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王德鑫, 褚佑彪, 刘难生, 李祝飞, 杨基明. 凸拐角附近激波与湍流边界层干扰的数值模拟研究[J]. 空气动力学学报, 2020, 38(1): 148-159.

WANG Dexin, CHU Youbiao, LIU Nansheng, et al. Numerical investigation of shock wave/boundary layer interactions near a convex corner[J]. 2020, 38(1): 148-159.
王德鑫, 褚佑彪, 刘难生, 李祝飞, 杨基明. 凸拐角附近激波与湍流边界层干扰的数值模拟研究[J]. 空气动力学学报, 2020, 38(1): 148-159. DOI： 10.7638/kqdlxxb-2019.0111.

WANG Dexin, CHU Youbiao, LIU Nansheng, et al. Numerical investigation of shock wave/boundary layer interactions near a convex corner[J]. 2020, 38(1): 148-159. DOI： 10.7638/kqdlxxb-2019.0111.

摘要

采用大涡模拟方法数值研究了来流马赫数

∞

=3、雷诺数

=2070的凸拐角附近激波与湍流边界层干扰问题。对于尖拐角和钝拐角两种情况，计算考察了激波入射到拐角下游时的流场结构、非定常分离流以及湍流统计特性。研究发现：尖拐角能够使流动产生局部集中的顺压梯度，导致壁面摩擦系数在拐角处出现峰值，因此分离点难以越过拐角向上游运动，而再附点发生前后运动。与尖拐角情况不同的是，钝拐角产生的局部顺压梯度不足以阻止分离点越过拐角，因此分离点和再附点都会发生运动。此外，尽管凸拐角产生的顺压梯度能抑制分离点附近的近壁小尺度涡结构，但在经过入射激波作用之后，近壁小尺度涡结构在再附点附近显著增强。

Abstract

Large-eddy simulations have been conducted on the interaction of shock/turbulent boundary layer near a convex corner of inflow with

∞

=3 and

=2070. Two typical convex corners

i.e.

the sharp and blunt corners

are considered. The geometrical effects of convex corner on the flow structures

unsteady separating flow

and turbulent statistical characteristics are analyzed systematically. For the sharp corner case

locally concentrated favorable pressure gradients are formed near the corner

where the wall friction coefficient obtains a high level. As a result

the separation point is fixed and thus unable to move cross th

e sharp corner

while the attachment point takes a front/back motion. However

for the blunt corner case

the separation point is not fixed at the corner because of the dispersed distribution of the favorable pressure gradient. As a consequence

both the separation and attachment points become to move front and back. Furthermore

the small scale vortical structures near the separation point are suppressed due to the presence of favorable pressure gradients near the convex corner

while enhanced greatly near the attachment point by the incident shock interaction.

关键词

Keywords

references

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