In the 1st report, the dynamic behavior of a cavitating centrifugal pump was related to the transient phenomena at the sudden opening/closure of the discharge valve. In this paper, the experimental study was extended to the transient behavior of the cavitating centrifugal pump at rapid starting/stopping of the pump. Unsteady pressures and flowrate were related to time-dependent cavitation behavior in a similar manner as for the rapid operation of the discharge valve. As a result of the present study, pressure fluctuations were found to occur due to water column separation at the sudden stop of the pump similarly to pressure oscillations associated with the sudden closure of the discharge valve. Moreover, the experimental results on the transient behavior at pump startup indicated that the transient fluctuations of delivery pressure and discharge flowrate are caused by oscillating cavitation similarly to the ones occurring at the opening of the discharge valve.
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December 1999
Research Papers
Transient Behavior of a Cavitating Centrifugal Pump at Rapid Change in Operating Conditions—Part 2: Transient Phenomena at Pump Startup/Shutdown
T. Tanaka,
T. Tanaka
Department of Mechanical and Electrical Engineering, Yatsushiro National College of Technology, Yatsushiro, 866-8501, Japan
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H. Tsukamoto
H. Tsukamoto
Department of Mechanical Engineering, Kyushu Institute of Technology, Tobata, Kitakyushu, 804-8550, Japan
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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. Dec 1999, 121(4): 850-856 (7 pages)
Published Online: December 1, 1999
Article history
Received:
March 12, 1998
Revised:
June 22, 1999
Online:
December 4, 2007
Citation
Tanaka, T., and Tsukamoto, H. (December 1, 1999). "Transient Behavior of a Cavitating Centrifugal Pump at Rapid Change in Operating Conditions—Part 2: Transient Phenomena at Pump Startup/Shutdown." ASME. J. Fluids Eng. December 1999; 121(4): 850–856. https://doi.org/10.1115/1.2823546
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