-
摘要: 采用粒子图像测速（Particle Image Velocimetry，PIV）技术，以乙二醇烟雾作为示踪粒子，实验测量了平面激波作用下SF6气柱-空气界面Richtmyer-Meshkov不稳定性演化图像和二维速度场。测量结果揭示了不稳定性流场的典型特征和细微结构，与高速摄影和数值模拟结果符合，说明建立的PIV技术适合用于诊断气体界面演化过程，为气体界面不稳定性实验研究提供了一种先进、精细的诊断技术。Abstract: An experimental investigation on gas interfacial instability was carried out with particle image velocimetry (PIV) technique. The evolution images and two dimensional velocity field of a shock-accelerated heavy gas cylinder in air were experimentally measured utilizing glycol fog droplets as tracking particle. The results exhibited the typical characteristics and fine structure of instability flow field, which were consistent with the numerical and experimental results published previously. Therefore, the PIV technique is feasible to measure the gaseous interface evolution process, and also is a advanced and accurate diagnostic technology for gaseous interfacial instability experiment.
-
Bakhrakh S M, Drennov O B, Kovalev N P, et al. Hydrodynamic Instability in Strong Media, UCRL-CR-126710 [R]. California: Lawrence Livermore National Laboratory, 1997. Kucherenko Y A, Shestachenko O E, Balabin S I, et al. RFNC-VNIITF Multifunctional Shock Tube for Investigating the Evolution of Instabilities in Nonstationary Gas Dynamic Flows [J]. Laser Part Beams, 2003, 21(3): 381-384. Zoldi C A. A Numerical and Experimental Study of a Shock-Accelerated Heavy Gas Cylinder [D]. Stony Brook: State University of New York, 2002. Fishbine B. Code Validation Experiments-A Key to Predictive Science [J/OL]. Los Alamos Research Quarterly, 2002: 6-14. Fan J C. Modern Flow Visualization [M]. Beijing: National Defence Industry Press, 2002. (in Chinese) 范洁川. 近代流动显示技术 [M]. 北京: 国防工业出版社, 2002. Zou L Y, Liu J H, Tan D W, et al. Experimental Study on the Membraneless Heavy Gas Cylinder and Gas Curtain Interfaces Impacted by a Weak Shock Wave [J]. Chinese Journal of High Pressure Physics, 2010, 24(4): 241-247. (in Chinese) 邹立勇, 刘金宏, 谭多望, 等. 弱激波冲击无膜重气柱和气帘界面的实验研究 [J]. 高压物理学报, 2010, 24(4): 241-247. Li P, Bai J S, Wang T, et al. Large Eddy Simulation of a Shocked Gas Cylinder Instability Induced Turbulence [J]. Science in China Series G, 2009, 39(9): 1241-1247. (in Chinese) 李平, 柏劲松, 王涛, 等. 激波作用下气柱不稳定性发展诱发湍流大涡数值模拟 [J]. 中国科学G辑, 2009, 39(9): 1241-1247. -
点击查看大图
计量
- 文章访问数: 7448
- HTML全文浏览量: 309
- PDF下载量: 513
下载:
