反射激波作用下重气柱界面演化的PIV研究

张赋, 翟志刚, 司廷, 罗喜胜

张赋, 翟志刚, 司廷, 罗喜胜. 反射激波作用下重气柱界面演化的PIV研究[J]. 实验流体力学, 2014, (5): 13-17. DOI: 10.11729/syltlx20130074
引用本文: 张赋, 翟志刚, 司廷, 罗喜胜. 反射激波作用下重气柱界面演化的PIV研究[J]. 实验流体力学, 2014, (5): 13-17. DOI: 10.11729/syltlx20130074
Zhang Fu, Zhai Zhigang, Si Ting, Luo Xisheng. Experimental study on the evolution of heavy gas cylinder under reshock condition by PIV method[J]. Journal of Experiments in Fluid Mechanics, 2014, (5): 13-17. DOI: 10.11729/syltlx20130074
Citation: Zhang Fu, Zhai Zhigang, Si Ting, Luo Xisheng. Experimental study on the evolution of heavy gas cylinder under reshock condition by PIV method[J]. Journal of Experiments in Fluid Mechanics, 2014, (5): 13-17. DOI: 10.11729/syltlx20130074

反射激波作用下重气柱界面演化的PIV研究

基金项目: 

中国博士后科学基金

国家自然科学基金

中央高校基本科研业务费专项资金

详细信息
  • 中图分类号: 11-5266/V

Experimental study on the evolution of heavy gas cylinder under reshock condition by PIV method

  • 摘要: 在水平激波管中采用PIV方法研究了反射激波作用下SF6重气柱界面的发展演化。采用射流方法形成SF6无膜气柱界面,并以乙二醇作为示踪粒子。利用连续激光片光源结合高速摄影相机对流场进行显示,得到了反射激波作用下SF6气柱界面的发展过程。结果表明,入射激波的冲击会在界面上产生反向旋转的涡环结构,而反射激波的作用会在界面上产生与初始涡环旋转方向相反的次级涡环结构。此外,对反射激波作用后的流场图像进行PIV后处理,获得了流场连续的速度场和涡量场。获得的环量与已有的理论模型进行比较,取得了较好的一致性,也验证了本文实验方法的可行性。
    Abstract: Evolution of a membrane-less heavy (SF6 )gas cylinder under reshock condition is experimentally investigated in a horizontal shock tube with particle image velocimetry (PIV ) method.As a fundamental interface configuration,gas cylinder evolution impinged by a single shock wave is extensively investigated while the related research under reshock condition is sel-dom performed.Illuminated by a continuous laser sheet,the interface morphology after the inci-dent shock and reshock impact is characterized by glycol droplets and captured by a high-speed camera.The generation and development of counter-rotating vortex pair after incident shock im-pact is observed and secondary vortex rings,which have opposite rotating directions with the o-riginal vortex rings,are generated after the reshock passage because of the opposite pressure gra-dient induced by reshock compared with the incident shock.Because the velocity of the flow field after reshock is very small,the PIV measurement based on the Matpiv procedure is employed to capture the flow field after reshock.The continuous velocity and vorticity fields are obtained with the help of the continuous light source and high speed camera.Compared with the PIV algorithm based on the double-exposure technique,continuous velocity field can be obtained in a single test run based on the high-speed technique in this experiment.The circulation derived from PIV measurements is compared with the existed analytical model and a good agreement is achieved, which validates the feasibility of the experimental method.
  • 期刊类型引用(1)

    1. 刘俊,罗新福,王显圣. 前缘形状对空腔模型气动特性影响试验. 航空学报. 2022(07): 78-88 . 百度学术

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出版历程
  • 刊出日期:  2014-10-24

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