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Research Papers: Flows in Complex Systems

Parametric Study on Fluid Dynamics of Pilot-Control Angle Globe Valve

[+] Author and Article Information
Jin-yuan Qian

Institute of Process Equipment,
College of Energy Engineering;
State Key Laboratory of Fluid Power and
Mechatronic Systems,
Zhejiang University,
Hangzhou 310027, China
e-mail: qianjy@zju.edu.cn

Zhi-xin Gao

Institute of Process Equipment,
College of Energy Engineering,
Zhejiang University,
Hangzhou 310027, China
e-mail: zhixingao@foxmail.com

Bu-zhan Liu

Institute of Process Equipment,
College of Energy Engineering,
Zhejiang University,
Hangzhou 310027, China
e-mail: 13675870932@126.com

Zhi-jiang Jin

Institute of Process Equipment,
College of Energy Engineering,
Zhejiang University,
Hangzhou 310027, China
e-mail: jzj@zju.edu.cn

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received January 18, 2018; final manuscript received April 12, 2018; published online May 18, 2018. Assoc. Editor: Riccardo Mereu.

J. Fluids Eng 140(11), 111103 (May 18, 2018) (8 pages) Paper No: FE-18-1033; doi: 10.1115/1.4040037 History: Received January 18, 2018; Revised April 12, 2018

Globe valve is widely used in numerous industries, and its driving energy consumption accounts for high percentages of the whole piping system. In order to figure out novel globe valves with low energy consumption, the pilot control globe valve (PCGV) is proposed, which is made up of a main valve and a pilot valve. By the pressure difference of fluid itself, the opened/closed status of the main valve can be controlled by the pilot valve, which can save driving energy and shorten the response time. In order to fit PCGV in an angle displaced piping system, the pilot control angle globe valve (PCAGV) is developed. In this paper, with validated numerical methods, both steady and transient simulations focusing on the valve core diameter, the single/multi orifices, orifice diameters and their arrangements located on the valve core bottom are presented. The results show that the pressure difference increases with the increase of the valve core diameter and the decrease of the orifice diameter, and large orifice diameters (d > 12 mm) should be avoided in case the valve cannot be opened. As for the multi orifices, it can be treated as a single orifice which having similar cross-sectional area. Meanwhile, the opening time of the main valve also increases with the increase of the valve core diameter correspondingly. Besides, a fitting formula of pressure difference calculation depending on the inlet velocity and the valve core diameter is obtained, which is a power–law relationship.

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Copyright © 2018 by ASME
Topics: Pressure , Valves
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Figures

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Fig. 1

PCAGV: (a) structural diagram and (b) flow channel and mesh

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Fig. 2

Flow fields under different valve core diameters: (a) D = 110 mm, (b) D = 115 mm, (c) D = 120 mm, and (d) D = 125 mm

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Fig. 3

Pressure distributions on the upper and lower surfaces of the valve core bottom: (a) D = 110 mm, (b) D = 115 mm, (c) D = 120 mm, and (d) D = 125 mm

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Fig. 4

Pressure difference under different valve core displacements and different valve core diameters

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Fig. 5

Pressure difference under different valve core diameters and different inlet velocities: (a) h = 0.02 m and (b) h = 0.035 m

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Fig. 6

PCAGV opening time under different valve core diameters

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Fig. 7

Valve core velocity under different valve core diameters

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Fig. 8

Relative errors of pressure difference between the calculated results and simulated results

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Fig. 9

Flow fields under different center distances of two orifices: (a) L = 10 mm and (b) L = 30 mm

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Fig. 10

Pressure distributions of the upper and lower surfaces of the valve core bottom: (a) L = 10 mm and (b) L = 30 mm

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Fig. 11

Pressure difference under different orifice diameters and different center distances

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Fig. 12

Pressure distributions of the upper and lower surfaces of the valve core bottom: (a) d = 8 mm and (b) d = 12 mm

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Fig. 13

Pressure difference under different orifice diameters and valve core displacements when inlet velocity is 1 m/s

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Fig. 14

Pressure difference under different orifice diameters and inlet velocities when valve core displacement is 0.015 m

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