2022 年 11 月
第 43 卷 第 11 期
推 进 技 术
JOURNA L O F PRO PU L S ION TECHNO LOGY
Nov. 2022
Vol.43 No.11
210520-1
侧滑角对V字形钝化前缘激波振荡特性影响 *
张英杰 1
,李祝飞 1
,张志雨 1
,黄 蓉 1
,王 军 1
,杨基明 1
,
武利龙 2
,刘坤伟 2
,操小龙 2
(1. 中国科学技术大学 近代力学系,安徽 合肥 230027;
2. 北京机电工程研究所,北京 100074)
摘 要:针对三维内转式进气道在侧滑状态下唇口处面临的非对称激波干扰问题,将唇口简化为V
形钝化前缘,在来流马赫数为4的风洞中,采用高速纹影拍摄与壁面脉动压力测量,并辅以数值模拟,
研究了半径比R/r=1 (V形根部倒圆半径R与前缘钝化半径r之比) 的V形钝化前缘在0°和2°侧滑角时的
流动特性。结果表明,V形根部存在大尺度流动分离和分离激波振荡现象,并且这种振荡现象导致的壁
面压力脉动对有/无侧滑非常敏感。与0°侧滑角相比,2°侧滑角时,迎风侧的分离区减小、振荡主频增
加、脉动压力峰值显著升高,而背风侧的变化趋势则相反。有/无侧滑时,分离激波振荡主频经同侧的
分离区尺度及直前缘激波后气流速度无量纲后,得到的斯特劳哈尔数均为St≈0.1,表明振荡现象均来源
于沿壁面的逆流与来流之间的竞争机制。基于高速纹影图像的本征正交分解表明,无侧滑时,两侧分离
激波振荡存在强耦合;而侧滑不仅会破坏这种振荡耦合,还使得前两阶振荡模态能量占比的差异性明显
增大。
关键词:进气道;激波干扰;流动分离;高速纹影;图像处理;激波振荡
中图分类号:V231.1 文献标识码:A 文章编号:1001-4055(2022)11-210520-13
DOI:10.13675/j.cnki. tjjs. 210520
Effects of Sideslip Angle on Shock Oscillations of
V-Shaped Blunt Leading Edge
ZHANG Ying-jie1
,LI Zhu-fei1
,ZHANG Zhi-yu1
,HUANG Rong1
,WANG Jun1
,YANG Ji-ming1
,
WU Li-long2
,LIU Kun-wei2
,CAO Xiao-long2
(1. Department of Modern Mechanics,University of Science and Technology of China,Hefei 230027,China;
2. Beijing Research Institute of Mechanical and Electrical Technology,Beijing 100074,China)
Abstract:The cowl lip of three-dimensional inward turning inlet is simplified as a V-shaped blunt leading
edge to reveal asymmetric shock wave interactions in the sideslip state. Flow characteristics of the V-shaped
blunt leading edge with a radius ratio R/r=1(the ratio of crotch radius R to the blunt radius r)at sideslip angles of
0° and 2° are investigated at a freestream Mach number of 4. High-speed schlieren photography and wall pres⁃
sure measurements are adopted in the experiments and numerical simulations are performed. The results show
that large-scale flow separations and shock wave oscillations occur at the V-shaped crotch and the fluctuating
pressure on the wall is sensitive to the sideslip angle. Compared with those of the sideslip angle of 0°,the size of
the separation decreases,the oscillation frequency increases,and the peak value of the fluctuating pressure in⁃
* 收稿日期:2021-08-02;修订日期:2021-09-28。
基金项目:国家自然科学基金(11772325;11621202)。
作者简介:张英杰,硕士生,研究领域为高超声速空气动力学。
通讯作者:李祝飞,博士,副教授,研究领域为高超声速空气动力学。
引用格式:张英杰,李祝飞,张志雨,等 . 侧滑角对 V 字形钝化前缘激波振荡特性影响[J]. 推进技术,2022,43(11):
210520. (ZHANG Ying-jie,LI Zhu-fei,ZHANG Zhi-yu,et al. Effects of Sideslip Angle on Shock Oscillations of VShaped Blunt Leading Edge[J]. Journal of Propulsion Technology,2022,43(11):210520.)