Research Papers: Fluid-Structure Interaction

Investigation of Fluid Transients in Centrifugal Pump Integrated System With MultiChannel Pressure Vessel

[+] Author and Article Information
Wuyi Wan

Department of Hydraulic Engineering,
College of Civil Engineering and Architecture,
Zhejiang University,
Hangzhou 310058, China
e-mail: wanwuyi@zju.edu.cn

Wenrui Huang

Department of Hydraulic Engineering,
Tongji University,
Shanghai 200092, China;
Department of Civil and Environmental Engineering,
Florida State University,
Tallahassee, FL 32310
e-mail: whuang@eng.fsu.edu

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the Journal of Pressure Vessel Technology. Manuscript received September 23, 2012; final manuscript received February 10, 2013; published online October 7, 2013. Assoc. Editor: Allen C. Smith.

J. Pressure Vessel Technol 135(6), 061301 (Oct 07, 2013) (9 pages) Paper No: PVT-12-1153; doi: 10.1115/1.4024457 History: Received September 23, 2012; Revised February 10, 2013

A pressure vessel is installed to prevent transient vacuum and overpressure in centrifugal pump integrated system. In order to study the transient response of the pressure vessel with multichannels and improve design approach, an integrated system with two centrifugal pumps and a pressure vessel is presented. Based on the water hammer method of characteristics (MOC), the integrated numerical model and program are established by combining pumps, valves and pressure vessels in the integrated systems. Transient pressure process and gas volume variation are simulated for the pressure vessel. The Oscillation amplitude and frequency are obtained, and then the extreme hydraulic transient pressures are analyzed and compared. An optimal design method is provided to determine the safe and economic mass (SEM) of gas (nitrogen) and corresponding optimal safe and economic volume (SEV) of pressure vessel.

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Fig. 1

The pump system with a multi-channel pressure vessel

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Fig. 2

The schematic of water supply system with integrated pump

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Fig. 3

The characteristic lines and calculating principles

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Fig. 4

The boundary model of pump without check valve

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Fig. 5

The boundary model of fixed vessel

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Fig. 6

The boundary model of compensate vessel

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Fig. 7

The valve boundary condition model

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Fig. 8

The discharge coefficient curve of valve

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Fig. 9

The flow chart of calculation

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Fig. 10

The pressure and volume time history of nitrogen

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Fig. 11

The comparison of pressure fluctuations

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Fig. 12

The volume time history during transient processes

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Fig. 13

The comparison of numerical and theoretical results

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Fig. 14

The relationship between extreme pressures and masses of gas

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Fig. 15

The relationship between maximum volumes and masses of gas

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Fig. 16

The comparison of transient fluctuation processes

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Fig. 17

The effect of pressure vessel on extreme pressure distribution



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