Experimental study of ventilated supercavitating flows around a hemisphere cylinder

被引：0
作者：
Duan, Lei [1 ]
Wang, Guo-Yu [1 ]
Fu, Xi-Neng [1 ]
机构：
[1] School of Mechanical Engineering, Beijing Institute of Technology
来源：
Binggong Xuebao/Acta Armamentarii | 2014年 / 35卷 / 04期
关键词：
Bubble shedding; Digital particle image velocimetry system; Fluid mechanics; Ventilated supercavity;
D O I：
10.3969/j.issn.1000-1093.2014.04.007
中图分类号：
学科分类号：
摘要：
To understand ventilated supercavitating flows around a hemisphere cylinder, the unsteady process of development of ventilated supercavity and the flow field of wake around a hemisphere cylinder are observed by means of a digital particle image velocimetry system and a high speed video camera. The results show that a steady transparent air area is observed near the foreside of the ventilated supercavity in the process of development of ventilated supercavity, and there is a vortex in the rear of supercavity. Water and air mixed area is full of the rear part, and finally bubble shedding in large scale appears, which has great effect on the flow field at the rear of a hemisphere cylinder. Compared to no-ventilated conditions, the range of low velocity area in the wake obviously expands, and the velocities of measuring points in various profiles decrease. The upper and lower velocimetry ropes stretch backward and enlarge by degrees as the ventilated cavity region extends rearward, becoming many dispersed velocimetry groups that gradually dissipate downstream.
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页码：475 / 483
页数：8
相关论文
共 12 条
  • [1] Wang M.-L., Mathematics modeling and control strategy of supercavitating vehicle, (2008)
  • [2] Semenenko V.N., Artificial supercavitation, physics and calculation, (2001)
  • [3] Kawakami E., Arndt R.E.A., Investigation of the behavior of ventilated supercavities, Journal of Fluids Engineering, 133, 9, pp. 091305-091315, (2011)
  • [4] Adrian R.J., Twenty years of particle image velocimetry, Experiments in Fluids, 39, 2, pp. 159-169, (2005)
  • [5] Fontecha L.G., PIV measurements in the wake of a supercavitating body, (2004)
  • [6] Wosnik M., Arndt R.E.A., Ain Q., Identification of large scale structures in the wake of cavitating hydrofoils using LES and time-resolved PIV, Sixth International Symposium on Cavitation, pp. 1-12, (2006)
  • [7] Wosnik M., Schauer T.J., Arndt R.E.A., Experimental study of a ventilated supercavitating vehicle, Fifth International Symposium on Cavitation, pp. 1-4, (2003)
  • [8] Wosnik M., An experimental study of a ventilated supercavity vehicle, (2003)
  • [9] Wosnik M., Fontecha L.G., Arndt R.E.A., Measurements in high void-fraction bubbly wakes created by ventilated supercavitation, ASME 2005 Fluids Engineering Division Summer Meeting, pp. 531-538, (2005)
  • [10] Li X.-B., Liu S.-Y., Wang G.-Y., Digital particle image velocimetry measurement and analysis of velocity distribution in the cavitating flows around a hydrofoil, Acta Armamentarii, 30, 3, pp. 277-281, (2007)
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