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Research Papers: Flows in Complex Systems

Transient Flow Study of a Novel Three-Cylinder Double-Acting Reciprocating Multiphase Pump

[+] Author and Article Information
Yi Ma

College of Mechanical Engineering,
Zhejiang University of Technology,
Engineering Research Center of Process,
Equipment and Remanufacturing,
Ministry of Education,
18, Chaowang Road,
Hangzhou 310014, China
e-mail: myant@zjut.edu.cn

Huashuai Luo

College of Mechanical Engineering,
Zhejiang University of Technology,
18, Chaowang Road,
Hangzhou 310014, China
e-mail: 807926177@qq.com

Tao Gao

Industrial and Logistics Engineering Design and
Research Institute,
China United Engineering Corporation,
1060, Binan Road,
Hangzhou 310052, China
e-mail: gaot@chinacuc.com

Zhihong Zhang

Research and Development Department,
CRRC Corporation Limited,
6, Chenfeng Road,
Ziyang 641301, China
e-mail: 347888819@qq.com

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received December 15, 2016; final manuscript received April 27, 2017; published online July 10, 2017. Assoc. Editor: John Abraham.

J. Fluids Eng 139(10), 101101 (Jul 10, 2017) (10 pages) Paper No: FE-16-1828; doi: 10.1115/1.4036715 History: Received December 15, 2016; Revised April 27, 2017

In petroleum industry, the stability of multiphase pumping is highly disturbed by the gas' presence with high content and variable working conditions. This paper is focused on studying the whole working cycle of the novel three-cylinder double-acting reciprocating multiphase pump. Based on the theoretical analysis, the method of computational fluid dynamics (CFD) is adopted to simulate the oil–gas flow in reciprocating multiphase pump. The numerical methodology, involving multiphase model, dynamic grid technique and user defined functions (UDF), is used to deal with in the calculation. The transient flow characteristics in pump cavity are obtained, and the flow ripples of reciprocating multiphase pump are analyzed. Furthermore, the effects of different operating parameters, such as suction and discharge pressures, inlet gas volume fraction (GVFi) on the capacity, and stability of pump, are studied. The results could help to develop and optimize the high-efficiency multiphase pump system.

Copyright © 2017 by ASME
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References

Figures

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Fig. 1

Diagram of reciprocating multiphase pump

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Fig. 2

Cavity layout and P–V diagram of reciprocating pump

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Fig. 3

Initial geometric model of cavity 1

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Fig. 4

Grids and dynamic zones of cavity 1

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Fig. 5

Comparisons of simulated and actual average flow rates

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Fig. 6

Contours of pressure and gas volume fraction in multiphase pump: (a) θ = 26 deg, h = 0.5 mm, t = 0.018 s; (b) θ = 70 deg, h = 4.5 mm, t = 0.049 s; (c) θ = 110 deg, h = 4.5 mm, t = 0.076 s; (d) θ = 150 deg, h = 4.5 mm, t = 0.104 s; and (e) θ = 200 deg, h = 4.5 mm, t = 0.139 s

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Fig. 7

Vectors near the suction valve in multiphase pump

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Fig. 8

Transient flow ripples of cavity 1: (a) flow ripple and (b) pressure ripple

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Fig. 9

Transient flow ripples of reciprocating multiphase pump

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Fig. 10

Suction flow ripples of cavity 1 under different conditions: (a) suction pressure, (b) discharge pressure, and (c) GVFi

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Fig. 11

Suction flow ripples of multiphase pump under different conditions: (a) suction pressure, (b) discharge pressure, and (c) GVFi

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Fig. 12

Discharge flow ripples of multiphase pump under different conditions: (a) suction pressure, (b) discharge pressure, and (c) GVFi

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Fig. 13

Effects of suction pressure on flow pulsation of multiphase pump

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Fig. 14

Effects of discharge pressure on flow pulsation of multiphase pump

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Fig. 15

Effects of GVFi on flow pulsation of multiphase pump

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