2022 年 11 月
第 43 卷 第 11 期
推 進(jìn) 技 術(shù)
JOURNA L O F PRO PU L S ION TECHNO LOGY
Nov. 2022
Vol.43 No.11
210520-1
側(cè)滑角對(duì)V字形鈍化前緣激波振蕩特性影響 *
張英杰 1
,李祝飛 1
,張志雨 1
,黃 蓉 1
,王 軍 1
,楊基明 1
,
武利龍 2
,劉坤偉 2
,操小龍 2
(1. 中國(guó)科學(xué)技術(shù)大學(xué) 近代力學(xué)系,安徽 合肥 230027;
2. 北京機(jī)電工程研究所,北京 100074)
摘 要:針對(duì)三維內(nèi)轉(zhuǎn)式進(jìn)氣道在側(cè)滑狀態(tài)下唇口處面臨的非對(duì)稱激波干擾問(wèn)題,將唇口簡(jiǎn)化為V
形鈍化前緣,在來(lái)流馬赫數(shù)為4的風(fēng)洞中,采用高速紋影拍攝與壁面脈動(dòng)壓力測(cè)量,并輔以數(shù)值模擬,
研究了半徑比R/r=1 (V形根部倒圓半徑R與前緣鈍化半徑r之比) 的V形鈍化前緣在0°和2°側(cè)滑角時(shí)的
流動(dòng)特性。結(jié)果表明,V形根部存在大尺度流動(dòng)分離和分離激波振蕩現(xiàn)象,并且這種振蕩現(xiàn)象導(dǎo)致的壁
面壓力脈動(dòng)對(duì)有/無(wú)側(cè)滑非常敏感。與0°側(cè)滑角相比,2°側(cè)滑角時(shí),迎風(fēng)側(cè)的分離區(qū)減小、振蕩主頻增
加、脈動(dòng)壓力峰值顯著升高,而背風(fēng)側(cè)的變化趨勢(shì)則相反。有/無(wú)側(cè)滑時(shí),分離激波振蕩主頻經(jīng)同側(cè)的
分離區(qū)尺度及直前緣激波后氣流速度無(wú)量綱后,得到的斯特勞哈爾數(shù)均為St≈0.1,表明振蕩現(xiàn)象均來(lái)源
于沿壁面的逆流與來(lái)流之間的競(jìng)爭(zhēng)機(jī)制。基于高速紋影圖像的本征正交分解表明,無(wú)側(cè)滑時(shí),兩側(cè)分離
激波振蕩存在強(qiáng)耦合;而側(cè)滑不僅會(huì)破壞這種振蕩耦合,還使得前兩階振蕩模態(tài)能量占比的差異性明顯
增大。
關(guān)鍵詞:進(jìn)氣道;激波干擾;流動(dòng)分離;高速紋影;圖像處理;激波振蕩
中圖分類號(hào):V231.1 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):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;修訂日期:2021-09-28。
基金項(xiàng)目:國(guó)家自然科學(xué)基金(11772325;11621202)。
作者簡(jiǎn)介:張英杰,碩士生,研究領(lǐng)域?yàn)楦叱曀倏諝鈩?dòng)力學(xué)。
通訊作者:李祝飛,博士,副教授,研究領(lǐng)域?yàn)楦叱曀倏諝鈩?dòng)力學(xué)。
引用格式:張英杰,李祝飛,張志雨,等 . 側(cè)滑角對(duì) V 字形鈍化前緣激波振蕩特性影響[J]. 推進(jìn)技術(shù),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.)