受限流动中激波诱导分离的结构分析

doi:10.7527/S1000-6893.2021.26042

激波/边界层干扰机理与控制专栏

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受限流动中激波诱导分离的结构分析

谢祝轩¹, 杨彦广², 王刚¹

1. 中国空气动力研究与发展中心超高速所, 绵阳 621000;
2. 中国空气动力研究与发展中心, 绵阳 621000

收稿日期:2021-07-02 修回日期:2021-10-11 出版日期:2022-01-15 发布日期:2021-10-09
通讯作者: 王刚 E-mail:wanggang@cardc.cn
基金资助:
国家重点研发计划（2019YFA0405300）；中国空气动力研究与发展中心基础和前沿技术研究基金（PJD20190075）

Structure of shock-induced separation in confined flow

XIE Zhuxuan¹, YANG Yanguang², WANG Gang¹

1. Hypervelocity Aerodynamics Institute,CADRC,Mianyang 621000,China;
2. China Aerodynamics Research and Development Center,Mianyang 621000,China

Received:2021-07-02 Revised:2021-10-11 Online:2022-01-15 Published:2021-10-09
Supported by:
National Key R&D Program of China(2019YFA0405300);Foundation and Frontier Technology Research Fund of CARDC(PJD20190075)

摘要/Abstract

摘要： 为了探索内流道中激波/边界层干扰引起的流动分离结构，采用RANS方法对马赫6来流下不同宽度、高度的带有20°楔角的矩形内流道流动进行计算，对内流道中分离结构开展了研究，重点关注了内流道下壁面中心区域分离的结构特征，比较了不同几何参数下的流动结构，总结其变化规律并简单讨论了各参数的影响机制。结果表明：内流道中激波诱导的分离具有复杂的三维结构，下壁面中心分离区涡结构呈"Ω"形，并通过两侧的旋风涡与侧壁面附近的分离发生质量交换。在给定来流状态参数的条件下，下壁面分离结构主要受宽度W（主要影响旋风涡之间的距离）和高度H（主要影响侧端分离尺寸及旋风涡与侧壁间距离）的影响。旋风涡之间的相互干扰是中心分离呈现二维特征或三维特征的关键。

关键词: 激波边界层干扰, 受限流动, 分离结构, 几何参数, 高超声速

Abstract: To study the flow separation caused by the shock wave/boundary layer interaction in the inner flow channel, RANS method is used to calculate the flow in a rectangular channel with a 20° wedge angle of different widths and heights under Mach 6 inflow. Studies on the separation structure of the inner flow channel are carried outby focusing on the structural characteristics of the separation in the center region of the bottom wall, comparing the flow structures under different geometric parameters, and summarizing the variation rules as well as discussing the influence mechanism of each parameter. The results show that the separation induced by shock wave in the inner channel has a complex three-dimensional structure; the vortex structure in the center separation zone of the bottom wall is "Ω"-shaped; the mass exchange with the separation near the side wall occurs through the cyclone vortex of "Ω" vortex. Under the condition of given inflow state parameters, the separation structure of the bottom wall is mainly affected by channel width W and height H, where H mainly affects the separation size near the side wall and the distance between the cyclone vortex and the side wall, and W mainly affects the distance between the cyclone vortex. The interaction between the cyclone vortexes is the key to the central separation of the present two-dimensional or three-dimensional features.

Key words: shock wave/boundary layer interaction, confined flow, separation structure, geometry parameters, hypersonic

中图分类号:

谢祝轩, 杨彦广, 王刚. 受限流动中激波诱导分离的结构分析[J]. 航空学报, 2022, 43(1): 626042.

XIE Zhuxuan, YANG Yanguang, WANG Gang. Structure of shock-induced separation in confined flow[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(1): 626042.

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E-mail：hkxb@buaa.edu.cn

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受限流动中激波诱导分离的结构分析

Structure of shock-induced separation in confined flow

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