一种计算超声速流中由湍流剪切层脉动引起的激波振荡频率的方法

徐立功; 冉政

一种计算超声速流中由湍流剪切层脉动引起的激波振荡频率的方法

徐立功¹,
冉政²

1.
中国科学技术大学近代力学系合肥;
2.
中国空气动力研究与发展中心四川绵阳

基金项目: 国家自然科学基金资助项目

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出版历程
- 收稿日期: 1990-08-20
- 刊出日期: 1991-08-15

A Calculating Method of Shock Wave Oscillating Frequency Due to Turbulent Shear Layer Fluctuations in Supersonic Flow

Xu Li-gong¹,
Ran Zheng²

1.
Department of Modern Mechanics, University of Science and Technology of China, Hefei;
2.
Division of Postgraduate, China Aerodynamics Research and Development Center, Mianyang, Sichuan

摘要

摘要: 在超声速或高超声速绕流中,一种很严重的脉动压力环境是由激波边界层相互作用引起的激波振荡.这种高强度的振荡激波可能诱发结构共振.因这一现象非常复杂,已发表的文章都采用经验或半经验方法.本文首次从基本流体动力学方程出发,给出了由湍流剪切层引起的激波振荡频率的理论解,得到了振荡频率随气流Mach数M_∞和压缩折转角θ的变化规律,计算结果与实验值是相符的.本文为激波振荡导致的气动弹性问题提供了一种有价值的理论方法.
- 激波振荡 /
- 激波边界层相互作用 /
- 脉动压力 /
- 激波特征频率 /
- 湍流声辐射 /
- 气动弹性
Abstract: One of the more severe fluctuating pressure environments encountered in supersonic or hypersonic flows is the shock wave oscillation driven by interaction of a shock wave with boundary layer. The high intensity oscillating shock wave may induce structure resonance of a high speed vehicle. The research for the shock oscillation used to adopt empirical or semiempirical methods because the phenomenon is very complex. In this paper a theoretical solution on shock oscillating frequency due to turbulent shear layer fluctuations has been obtained from basic conservation equations. Moreover, we have attained the regularity of the frequency of oscillating shock varying with incoming flow Much numbers M_∞ and turning angle θ. The calculating results indicate excellent agreement with measurements. This paper has supplied a valuable analytical method to study aeroelastic problems produced by shock wave oscillation.
- shock wave oscillation /
- interaction of shock wave with boundary layer /
- fluctuating pressure /
- eigenfrequency of shock wave /
- turbulent acoustic radiation /
- aeroelastics

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参考文献(8)

[1]	Trilling,L.,Oscillating shock-boundary layer interaction,J.A.S.,25,5(1958).
[2]	Plotkin,K.J.and J.E.Robertson,Prediction of space shuttle fluctuating pressure environments,NASA CR-124347(1973).
[3]	Phillips,O.M.,On the generation of wave by turbulent wind,J.Fluid Mech.,2(1957),417.
[4]	Lilley,G.M.,Wall pressure fluctuations under turbulent boundary layer at subsonic and supersonic speed,AGARD Rept.,454(1963).
[5]	Michael,S.H.,Shock wave-turbulent boundary layer interaction in hypersonic flow.ARL 73-0137(1973).
[6]	Dolling,D.S.,Unsteadiness of shock-wave induced turbulent boundary layer separation,Turbulent Shear Layer/Shock Wave Interaction,Ed.J.Delery,Springer,Berlin Heidelberg(1986),341-357.
[7]	Tran,T.T.,D.K.M.Tan and S.M.Bogdonoff,Surface pressure fluctuating in a three-dimensional shock wave/turbulent boundary layer interaction at various shock strengths,AIAA Paper 85-1562(1985).
[8]	冉政,振荡激波与湍流边界层相互干扰的研究.中国科学技术大学近代力学系毕业论文(1990),