期刊文献+

Experimental and numerical investigation of unsteady cavitating flows through a 2D hydrofoil 被引量:24

Experimental and numerical investigation of unsteady cavitating flows through a 2D hydrofoil
原文传递
导出
摘要 In the present study, firstly, the unsteady cavitating flows around a hydrofoil are studied based on the flow visualization and detail velocity measurement, a high-speed video camera is used to visualize the flow structures, and a particle image velocimetry (PIV) technique is applied to the measurement of the time-averaged and instantaneous velocity and vorticity fields. The results show that the unsteadiness of mass transfer process between the vapor and the two-phase regions is substantial, a self-oscillatory behavior of the whole sheet cavitation is obtained, with large length fluctuations and vapor cloud shedding, and also the cavitation structure depends on the interaction of the water-vapor mixture and the periodic vortex shedding. The main purpose of this experimental study is to offer information for validating computational models, and shed light on the unsteady multiphase transport process of cavitating flows. Furthermore, with an emphasis on the dynamics of the attached turbulent cavitating flows, a filter-based model (FBM) is derived from the k-6 two-equation model, a conditional averaging method aimed at improving unsteady simulation is applied to computation. In comparison to the standard k-ε model, overall, the filter-based model is shown to improve the predictive capability considerably.
出处 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第7期1801-1812,共12页 中国科学(技术科学英文版)
基金 supported by the National Natural Science Foundation of China (Grant Nos. 50679001 and 50979004)
关键词 unsteady cavitating flows high-speed camera particle image velocimetry mass transfer ~ter-based turbulence models 空化流动 非定常流动 数值研究 水翼 实验 流场可视化 计算模型 二维
  • 相关文献

参考文献19

  • 1E. J. Foeth,C. W. H. Doorne,T. Terwisga,B. Wieneke.Time resolved PIV and flow visualization of 3D sheet cavitation[J]. Experiments in Fluids . 2006 (4)
  • 2A. L. Tassin,C. -Y. Li,S. L. Ceccio,L. P. Bernal.Velocity field measurements of cavitating flows[J]. Experiments in Fluids . 1995 (2)
  • 3Kubota A,,Kato H,Yamaguchi H, et al.Unsteady structure meas- urement of cloud cavitation on a foil section using conditional sam- pling technique. J Fluid Eng-T, ASME . 1989
  • 4Kawanami Y,Kato H,Yamaguchi T et al.Mechanism and control of cloud cavitation. Journal of Fluids Engineering Transactions of the ASME . 1997
  • 5Callenaere M,Franc J P,Michel J M, et al.The cavitation instability induced by the development of a Re-entrant jet. Journal of Fluid Mechanics . 2001
  • 6Senocak I,Shyy W.Interfacial dynamics-based modeling of turbulent cavitating flows, Part-2: Time-dependent computations. International Journal for Numerical Methods in Engineering . 2004
  • 7Johansen S T,Wu J Y,Shyy W.Filter based unsteady RANS com- putational. International Journal of Heat and Fluid Flow . 2005
  • 8Shyy W,Thakur S S,Ouyang H, et al.Computational Techniques for Complex Transport Phenomenon. . 2007
  • 9Brennen C E.Cavitation and Bubble Dynamics. . 1995
  • 10Knapp RT,Daily JW,Hammitt FG.Cavitation. . 1970

同被引文献223

引证文献24

二级引证文献169

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部