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Numerical analysis of flow and cavitation characteristics in a pilot-control globe valve with different valve core displacements

Qian, Jin yuan LU ; Liu, Bu zhan; Jin, Zhi jiang; Wang, Jian kai; Zhang, Han and Lu, An le (2016) In Journal of Zhejiang University: Science A 17(1). p.54-64
Abstract

The pilot-control globe valve (PCGV) is a novel globe valve with a piston-type valve core and a small pilot valve. It can utilize a pressure difference to control the state of the main valve by the pilot valve. In this paper, a mathematical model of PCGV is established and a computational fluid dynamics (CFD) method is used to numerically simulate its flow and cavitation characteristics. Analysis of the pressure difference between the upside and downside of the valve core and comparison with similar previous work increase the reliability of the simulation. Then an analysis of flow and cavitation characteristics is carried out with three comparisons: a comparison between opened and closed states, a comparison between different inlet... (More)

The pilot-control globe valve (PCGV) is a novel globe valve with a piston-type valve core and a small pilot valve. It can utilize a pressure difference to control the state of the main valve by the pilot valve. In this paper, a mathematical model of PCGV is established and a computational fluid dynamics (CFD) method is used to numerically simulate its flow and cavitation characteristics. Analysis of the pressure difference between the upside and downside of the valve core and comparison with similar previous work increase the reliability of the simulation. Then an analysis of flow and cavitation characteristics is carried out with three comparisons: a comparison between opened and closed states, a comparison between different inlet velocities, and a comparison between different valve core displacements. The results demonstrate that the vapor volume fraction reaches its peak point at the valve seat near the outlet tube, and that a higher inlet velocity or smaller valve core displacement can cause greater cavitation damage. This study can help further design work for optimization and engineering applications of PCGV.

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Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cavitation, Computational fluid dynamics (CFD), Pilot-control globe valve (PCGV), Valve core displacement
in
Journal of Zhejiang University: Science A
volume
17
issue
1
pages
11 pages
publisher
Zhejiang University Press
external identifiers
  • scopus:84953775923
ISSN
1673-565X
DOI
10.1631/jzus.A1500228
language
English
LU publication?
no
id
6c31faff-2af3-4009-a2e1-f38f5ae7726a
date added to LUP
2016-11-11 17:07:44
date last changed
2017-11-19 04:34:43
@article{6c31faff-2af3-4009-a2e1-f38f5ae7726a,
  abstract     = {<p>The pilot-control globe valve (PCGV) is a novel globe valve with a piston-type valve core and a small pilot valve. It can utilize a pressure difference to control the state of the main valve by the pilot valve. In this paper, a mathematical model of PCGV is established and a computational fluid dynamics (CFD) method is used to numerically simulate its flow and cavitation characteristics. Analysis of the pressure difference between the upside and downside of the valve core and comparison with similar previous work increase the reliability of the simulation. Then an analysis of flow and cavitation characteristics is carried out with three comparisons: a comparison between opened and closed states, a comparison between different inlet velocities, and a comparison between different valve core displacements. The results demonstrate that the vapor volume fraction reaches its peak point at the valve seat near the outlet tube, and that a higher inlet velocity or smaller valve core displacement can cause greater cavitation damage. This study can help further design work for optimization and engineering applications of PCGV.</p>},
  author       = {Qian, Jin yuan and Liu, Bu zhan and Jin, Zhi jiang and Wang, Jian kai and Zhang, Han and Lu, An le},
  issn         = {1673-565X},
  keyword      = {Cavitation,Computational fluid dynamics (CFD),Pilot-control globe valve (PCGV),Valve core displacement},
  language     = {eng},
  month        = {01},
  number       = {1},
  pages        = {54--64},
  publisher    = {Zhejiang University Press},
  series       = {Journal of Zhejiang University: Science A},
  title        = {Numerical analysis of flow and cavitation characteristics in a pilot-control globe valve with different valve core displacements},
  url          = {http://dx.doi.org/10.1631/jzus.A1500228},
  volume       = {17},
  year         = {2016},
}