Experimental study on hydrodynamic performance of a cavitating centrifugal pump during transient operation

An experimental study has been carried out in order to analyze the cavitation of a centrifugal pump and its effect on transient hydrodynamic performance during transient operation. The transient characteristics of the centrifugal pump were tested under various suction pressure and starting conditions. In transient operation of continuous starting and stopping process, instantaneous rotational speed, head, flow rate and suction pressure of the pump were measured. The effect of cavitation on transient performance of the centrifugal pump during transient operation was analyzed, and then the effects of starting acceleration rate and suction pressure of pump on cavitation were presented. Results showed that the cavitation would be delayed during rapid starting period. However, in the condition of low suction pressure and high rotational speed, pump cavitation is inescapable even if the starting period is less than a second. After the serious transient cavitation occurred, the transient performance of centrifugal pump would decline obviously, and the instantaneous head of pump would fluctuate.

[1]  Hiroshi Tsukamoto,et al.  Transient Behavior of a Cavitating Centrifugal Pump at Rapid Change in Operating Conditions—Part 1: Transient Phenomena at Opening/Closure of Discharge Valve , 1999 .

[2]  Hu Zheng-yu.  Study on transient hydrodynamic performance of Mixed-Flow-Pump during starting period , 2004 .

[3]  W. P. Barker,et al.  Centrifugal Pump Performance During Transient Operation , 1995 .

[4]  T H C Childs,et al.  The Material Removal Mechanism in Magnetic Fluid Grinding of Ceramic Ball Bearings , 1994 .

[5]  P Thanapandi,et al.  A Quasi-Steady Performance Prediction Model for Dynamic Characteristics of a Volute Pump , 1994 .

[6]  Hu Zheng-yu.  Numerical simulation of centrifugal pump's transient performance during rapid starting period , 2005 .

[7]  François Avellan,et al.  Centrifugal Pump Performance Drop Due to Leading Edge Cavitation: Numerical Predictions Compared With Model Tests , 1998 .

[8]  P. Thanapandi,et al.  Centrifugal pump transient characteristics and analysis using the method of characteristics , 1995 .

[9]  Hiroshi Tsukamoto,et al.  Transient behavior of a cavitating centrifugal pump at rapid change in operating conditions-part 2 : Transient phenomena at pump startup/ shutdown , 1999 .

[10]  Laura L. Pauley,et al.  Performance Analysis of Cavitating Flow in Centrifugal Pumps Using Multiphase CFD , 2002 .

[11]  Hiroshi Tsukamoto,et al.  Transient Behavior of a Cavitating Centrifugal Pump at Rapid Change in Operating Conditions—Part 3: Classifications of Transient Phenomena , 1999 .

[12]  Hiroshi Tsukamoto,et al.  Closure to “Discussion of ‘Transient Characteristics of a Centrifugal Pump During Starting Period’” (1982, ASME J. Fluids Eng., 104, pp. 13–14) , 1982 .