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TECHNICAL PAPERS

Swing Check Valve Characterization and Modeling During Transients

[+] Author and Article Information
Guohua Li, Jim C. P. Liou

Department of Civil Engineering, University of Idaho, Moscow, ID 83844-1022

J. Fluids Eng 125(6), 1043-1050 (Jan 12, 2004) (8 pages) doi:10.1115/1.1625689 History: Received January 15, 2003; Revised June 23, 2003; Online January 12, 2004
Copyright © 2003 by ASME
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References

Figures

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Definition of variables associated with a swing check valve
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The schematic of the test rig
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Replacement shaft and measuring devices (left: potentiometer, right: accelerometer)
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Estimated static frictional torque
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Stationary hydraulic torque coefficients; (a) disk angle versus through flow velocity, (b) stationary coefficient versus disk angle, (c) stationary coefficient versus Reynolds number, (d) stationary coefficient for forward and reverse flows
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Results in quadrant 3 (V=−0.41 m/s); (a) disk angle versus time, (b) disk velocity versus disk angle, (c) disk acceleration versus disk angle, (d) rotational coefficient versus disk angle
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Results in quadrant 4 (V=0.76 m/s); (a) disk angle versus time, (b) disk velocity versus disk angle, (c) disk acceleration versus disk angle, (d) rotational coefficient versus disk angle
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Rotational coefficients in quadrants 3 and 4. The disk angles are 10, 20, and 30 deg for the top, middle, and bottom traces in panels (a) and (b) 20, 30, and 40 deg for panels (c) and (d) 40, 50, and 60 deg for panels (e) and (f).
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Inherent hydraulic characteristic of the check valve
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Ratio hydraulic torque in the Cv model over stationary hydraulic torque
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Comparisons between simulation results and test data (steady state through flow velocity=1.93 m/s)
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Simulated disk velocity and torque components (steady-state through flow velocity=1.93 m/s)

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