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ADDITIONAL TECHNICAL PAPERS

Air Entrainment Effects on the Pressure Transients of Pumping Systems With Weir Discharge Chamber

[+] Author and Article Information
T. S. Lee, K. L. Ngoh

Mechanical Engineering Department, National University of Singapore, Singapore 119260, Singapore

J. Fluids Eng 124(4), 1034-1043 (Dec 04, 2002) (10 pages) doi:10.1115/1.1514204 History: Received May 05, 2000; Revised May 03, 2002; Online December 04, 2002
Copyright © 2002 by ASME
Topics: Pressure , Pumps , Pipelines , Fluids , Waves
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References

Tullis, J. P., ed, 1971, Control of Flow in Closed Conduits, Colorado State University, Fort Collins, CO, pp. 315–340.
Pearsall,  I. S., 1965–1966, “The Velocity of Water Hammer Waves,” Proc. Inst. Mech. Eng., 180, Part.3E, pp. 12–20.
Fox, J. A., 1984, Hydraulic Analysis of Unsteady Flow In Pipe Network, Macmillan Press, London.
Lee, T. S., and Cheong, H. F., 2001, “Fluid Transient With Air Entrainment,” Final Research Report No. R-265-000-021-112. Mechanical Engineering Department, National University of Singapore.
Kranenburg, C., 1972, “The Effect of Free Gas on Cavitation in Pipelines Induced by Waterhammer,” Proc. Int. Conf. on Pressure Surges, BHRA, Bath, U.K., pp. 65–80.
Provoost, G. A., 1976, “Investigation Into Cavitation in a Prototype Pipeline Caused by Waterhammer,” Proc. 2nd Int. Conf. on Pressure Surges, BHRA, Bedford, UK, pp. 35–43.
Chaudhry,  M. H., Bhallamudi,  S. M., Martin,  C. S., and Naghash,  M., 1990, “Analysis of Transient Pressures in Bubbly, Homogeneous, Gas-Liquid Mixtures,” ASME J. Fluids Eng., 112, pp. 225–231.
Wylie, E. B., Streeter, S. L., and Suo, L., 1993, Fluid Transients in Systems, McGraw-Hill, New York.
Lee,  T. S., and Pejovic,  S., 1996, “Air Influence on Similarity of Hydraulic Transients and Vibrations,” ASME J. Fluids Eng., 118, pp. 706–709.
Roache, P. J., 1972, Computational Fluid Dynamics, Hermosa Publishers, Albuauerque, NM.
Jonsson, L., 1985, “Maximum Transient Pressures in a Conduit With Check Valve and Air Entrainment,” International Conference on the Hydraulics of Pumping Stations, The University of Manchester Institute of Science and Technology (UMIST) & BHRA–The Fluid Engineering Center, England, pp. 55–76.
Lee, T. S., and Cheong, H. F., 1998, “Tanjong Rhu Pumping Station—Site Measurement and Analysis of Surge in Pumping Main,” Ebara Engineering Singapore Pte Ltd., Singapore, Internal Report.

Figures

Grahic Jump Location
(a) Pumping station pipeline profile, (b) Weir discharge chamber at location C
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Transient pressure at peak location B with HC at LWL
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Transient pressure at peak location B with HV above HWL
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Transient pressure at peak location B with HC=HWL+3/10 ΔWL=105.26 m
Grahic Jump Location
(a) Transient pressure at peak location B HC=LWL=101.10 m. (b) Transient pressure at peak location B HC=LWL+3/10 ΔWL=105.26 m.
Grahic Jump Location
Comparisons with field measurements transient pressure at peak location B with HC=HWL+2/10 ΔWL=104.94 m

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