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RESEARCH PAPERS

Transient Behavior of a Cavitating Centrifugal Pump at Rapid Change in Operating Conditions—Part 1: Transient Phenomena at Opening/Closure of Discharge Valve

[+] Author and Article Information
T. Tanaka

Department of Mechanical and Electrical Engineering, Yatsushiro National College of Technology, Yatsushiro, 866-8501, Japan

H. Tsukamoto

Department of Mechanical Engineering, Kyushu Institute of Technology, Tobata, Kitakyushu, 804-8550, Japan

J. Fluids Eng 121(4), 841-849 (Dec 01, 1999) (9 pages) doi:10.1115/1.2823545 History: Received March 12, 1998; Revised June 22, 1999; Online December 04, 2007

Abstract

A series of studies on the dynamic characteristics of noncavitating centrifugal pumps were extended to the cavitating case. An experimental study was carried out on the transient behavior of a cavitating centrifugal pump at the sudden opening/closure of the discharge valve. Cavitation behavior in the centrifugal pump was visualized during the transient period by using high speed video camera, and instantaneous pressure and flowrate were measured at the pump suction and discharge section with rotational speed during the transient period. Unsteady pressure, as well as flowrate, was related to the time-dependent cavitation behavior. As a result of the present study, pressure and flowrate fluctuations were found to occur due to oscillating cavitation or water column separation at rapid transient operations.

Copyright © 1999 by The American Society of Mechanical Engineers
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