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Research Papers: Fluid-Structure Interaction

Sensitivity Analysis for the Resistance on the Performance of a Pressure Vessel for Water Hammer Protection

[+] 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

Cong Li

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

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received July 18, 2013; final manuscript received October 8, 2013; published online November 27, 2013. Assoc. Editor: Jong Chull Jo.

J. Pressure Vessel Technol 136(1), 011303 (Nov 27, 2013) (9 pages) Paper No: PVT-13-1115; doi: 10.1115/1.4025829 History: Received July 18, 2013; Revised October 08, 2013

Pressure vessels can greatly protect a water supply pipeline system from water hammer damages. In order to improve the performance of a pressure vessel, a strainer is proposed to compensate the resistance of the connecting pipe. A numerical model and program is established for a pressure vessel with an independent compensation strainer based on the method of characteristics (MOC). Using the proposed model, the hydraulic transient processes are simulated for a pressure vessel with various strainer resistances, and the hydraulic pressure and volume fluctuations are obtained by the proposed model. The influences of resistance on the transient process are analyzed and an optimal approach is suggested to determine the suitable compensation strainer for the pressure vessel. A water hammer protection system is optimized based on the proposed method. The result shows that the compensation strainer can largely affect both positive and negative water hammer pressure. If a suitable strainer is selected based on the proposed approach, the transient surge and extreme pressure distribution will decrease. To some degree, it is simple and convenient to improve a pressure vessel by employing an additional compensation strainer in the pipeline system for water hammer protection.

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References

Figures

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Fig. 1

The schematic of MOC recursive process

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Fig. 2

The pressure vessel with compensation strainer

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Fig. 3

The model of pressure vessel transient analysis

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Fig. 4

The flow chart of iterative process

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Fig. 5

The relative precision and iterative times

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Fig. 6

The transient response process of pressure vessel

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Fig. 7

The comparison of response of pressure

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Fig. 8

The flow response process of junction

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Fig. 9

The vessel and main pressure process without compensation

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Fig. 10

The vessel and main pressure process with compensation

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Fig. 11

The pressure process for various compensations

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Fig. 12

The envelopment of extreme pressure for various compensations

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Fig. 13

The relationship of extreme pressure and resistance compensation

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Fig. 14

The pressure processes for various connecting pipes

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Fig. 15

The envelops of extreme pressure for various connecting pipes

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Fig. 16

The relationship of extreme pressure and the diameter

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Fig. 17

The sensitivity analysis of Cg on extreme pressure

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Fig. 18

The influence of strainer on pressure surge

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Fig. 19

The influence of strainer on extreme pressure

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