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research-article

A parametric study of hydrodynamic cavitation inside globe valves

[+] Author and Article Information
Zhi-jiang Jin

Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China
jzj@zju.edu.cn

Zhi-xin Gao

Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China
zhixingao@foxmail.com

Jin-yuan Qian

Institute of Process Equipment, Zhejiang University, Hangzhou 310027, ChinaState Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, ChinaDepartment of Energy Sciences, Lund University, P.O. Box 118, SE-22100 Lund, Sweden
qianjy@zju.edu.cn

Zan Wu

Department of Energy Sciences, Lund University, P.O. Box 118, SE-22100 Lund, Sweden
zan.wu@energy.lth.se

Bengt Sunden

Department of Energy Sciences, Lund University, P.O. Box 118, SE-22100 Lund, Sweden
Bengt.Sunden@energy.lth.se

1Corresponding author.

ASME doi:10.1115/1.4038090 History: Received May 16, 2017; Revised September 15, 2017

Abstract

Hydrodynamic cavitation occurs inside globe valves increases the energy consumption burden of the whole piping system, and leads to severe damages to the valve body and piping system with a large economic loss. In this paper, in order to reduce the hydrodynamic cavitation inside globe valves, effects of valve body geometry parameters including bending radius, deviation distance and arc curvature linked to in/export parts on hydrodynamic cavitation are investigated by using a cavitation model. To begin with, the numerical model is compared with similar works to check its accuracy. Then, the vapor volume fraction in each computational cell and the total vapor volume are predicted. The results show that vapor primarily appears around the valve seat and connecting downstream pipes. The hydrodynamic cavitation does not occur under a small inlet velocity, a large bending radius, and a large deviation distance. Cavitation intensity decreases with the increase of the bending radius, the deviation distance and the arc curvature linked to in/export parts. This indicates that valve geometry parameters should be chosen as large as possible, while the maximal fluid velocity should be limited. This work is of significance for hydrodynamic cavitation or globe valve design.

Copyright (c) 2017 by ASME
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