Numerical simulation of unsteady cavitation in a high-speed water jet

doi:10.5293/IJFMS.2016.9.1.066

IR > 新能源学院

	Numerical simulation of unsteady cavitation in a high-speed water jet
	Peng, Guoyi 1; Okada, Kunihiro 1; Yang, Congxin2 ; Oguma, Yasuyuki 1; Shimizu, Seiji 1
	2015-12-19
发表期刊	International Journal of Fluid Machinery and Systems
卷号	9 期号:1 页码:66-74
摘要	Concerning the numerical simulation of high-speed water jet with intensive cavitation this paper presents a practical compressible mixture flow method by coupling a simplified estimation of bubble cavitation and a compressible mixture flow computation. The mean flow of two-phase mixture is calculated by URANS for compressible fluid. The intensity of cavitation in a local field is evaluated by the volume fraction of gas phase varying with the mean flow, and the effect of cavitation on the flow turbulence is considered by applying a density correction to the evaluation of eddy viscosity. High-speed submerged water jets issuing from a sheathed sharp-edge orifice nozzle are treated when the cavitation number, σ = 0.1, and the computation result is compared with experimental data The result reveals that cavitation occurs initially at the entrance of orifice and bubble cloud develops gradually while flowing downstream along the shear layer. Developed bubble cloud breaks up and then sheds downstream periodically near the sheath exit. The pattern of cavitation cloud shedding evaluated by simulation agrees experimental one, and the possibility to capture the unsteadily shedding of cavitation clouds is demonstrated. The decay of core velocity in cavitating jet is delayed greatly compared to that in no-activation jet, and the effect of the nozzle sheath is demonstrated. © 2016, Turbomachinery Society of Japan. All rights reserved.
关键词	Cavitation Computational fluid dynamics Gas dynamics Jets Mine roof supports Mixtures Nozzles Numerical methods Numerical models Orifices Bubble dynamics Compressible fluids Compressible mixtures Density correction High speed water jet Intensive cavitations Submerged water jet Unsteady cavitation
DOI	10.5293/IJFMS.2016.9.1.066
收录类别	EI
语种	英语
出版者	Turbomachinery Society of Japan
EI入藏号	20161002048945
EI主题词	Two phase flow
EI分类号	502.2 Mine and Quarry Equipment - 631 Fluid Flow - 723.5 Computer Applications - 921 Mathematics - 921.6 Numerical Methods
来源库	Compendex
分类代码	502.2 Mine and Quarry Equipment - 631 Fluid Flow - 723.5 Computer Applications - 921 Mathematics - 921.6 Numerical Methods
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/112772
专题	新能源学院能源与动力工程学院
作者单位	1.Department of Mechanical Engineering, College of Engineering, Nihon University Tamura-machi, Koriyama; Fukushima; 963-8642, Japan; 2.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China
推荐引用方式 GB/T 7714	Peng, Guoyi,Okada, Kunihiro,Yang, Congxin,et al. Numerical simulation of unsteady cavitation in a high-speed water jet[J]. International Journal of Fluid Machinery and Systems,2015,9(1):66-74.
APA	Peng, Guoyi,Okada, Kunihiro,Yang, Congxin,Oguma, Yasuyuki,&Shimizu, Seiji.(2015).Numerical simulation of unsteady cavitation in a high-speed water jet.International Journal of Fluid Machinery and Systems,9(1),66-74.
MLA	Peng, Guoyi,et al."Numerical simulation of unsteady cavitation in a high-speed water jet".International Journal of Fluid Machinery and Systems 9.1(2015):66-74.