Experimental research on optimizing the flow field of pulse gas flow generator

被引：0
|
作者：
Ren B. [1 ]
Tao G. [1 ]
Zhou J. [1 ]
Wang J. [2 ]
Wang B. [2 ]
机构：
[1] School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu
[2] Beijing Institute of Tracking and Communication Technology, Beijing
来源：
| 1600年 / Explosion and Shock Waves卷 / 36期
关键词：
Fluid mechanics; Image processing; Pulse gas flow generator; Shock wave; Vortex ring;
D O I：
10.11883/1001-1455(2016)01-0031-07
中图分类号：
学科分类号：
摘要：
In order to investigate the characteristics of pulse gas flow generator with different nozzle structures and analyze those of the flow field and their tendencies to change, we achieved the shock wave profiles generated by the gas flow generators and obtained experimental photos of flow field by using high-speed photography technology and controlling the light sources. Next, we studied the influence of different nozzles on air flow patterns using the polynomial fitting method to acquire the overpressure of shock wave, the attenuation rules of velocity corresponding with change of distance. Moreover, taking advantage of image processing technology, we collected effective data of the air flow from experimental images and, according to the first order exponential decay equation, we deduced the gas flow displacements and the variation rules of velocity corresponding with changes of time. Our results will help to better understand and use the relevant parameters of shock wave and gas flow and thus provide effective reference to optimized design for the equipment. © 2016, Explosion and Shock Waves. All right reserved.
引用
收藏
页码：31 / 37
页数：6
相关论文
共 17 条
  • [1] Lucey G., Jasper L., Vortex ring generator, (1998)
  • [2] Shusser M., Gharib M., Energy and velocity of a forming vortex ring, Physics of Fluids (1994-present), 12, 3, pp. 618-621, (2000)
  • [3] Gharib M., Rambod E., Shariff K., A universal time scale for vortex ring formation, Journal of Fluid Mechanics, 360, pp. 121-140, (1998)
  • [4] Linden P.F., Turner J.S., The formation of optimal vortex rings, and the efficiency of propulsion devices, Journal of Fluid Mechanics, 427, pp. 61-72, (2001)
  • [5] Dabiri J.O., Gharib M., Delay of vortex ring pinchoff by an imposed bulk counterflow, Physics of Fluids (1994-present), 16, 4, pp. L28-L30, (2004)
  • [6] Mohseni K., Ran H., Colonius T., Numerical experiments on vortex ring formation, Journal of Fluid Mechanics, 430, pp. 267-282, (2001)
  • [7] Saffman P.G., Vortex Dynamics, (1992)
  • [8] Widnall S.E., Bliss D.B., Tsai C.Y., The instability of short waves on a vortex ring, Journal of Fluid Mechanics, 66, 1, pp. 35-47, (1974)
  • [9] Widnall S.E., Tsai C.Y., The instability of the thin vortex ring of constant vorticity, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 287, 1344, pp. 273-305, (1977)
  • [10] Fraenkel L.E., Examples of steady vortex rings of small cross-section in an ideal fluid, Journal of Fluid Mechanics, 51, 1, pp. 119-135, (1972)
12