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The Rotating Cavitation Performance of a Centrifugal Pump with a Splitter-Bladed Inducer under Different Rotational Speed

  • XiaoMei Guo , ZuChao Zhu EMAIL logo , BaoLing Cui and Yi Li
Published/Copyright: January 17, 2015
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Abstract

Designing inducer is one of the effective ways to improve the suction performance of high-speed centrifugal pumps. The operation condition including rotational speeds can affect the internal flow and external performance of high-speed centrifugal pumps with an inducer. In order to clarify the rotating cavitation performance of a centrifugal pump with a splitter-bladed inducer under different rotational speed, a centrifugal pump with a splitter-bladed inducer is investigated in the work. By using Rayleigh–Plesset equations and Mixture model, the cavitation flow of centrifugal pump is numerically simulated, as well as the external performance experimental test is carried out. It is found that the cavitation area increases with the rotational speeds. The location of the passage where cavitation is easy to appear is explored. Asymmetric cavitation behavior is observed. That, the trail of the inducer is easy to take cavitation when the rotational speed is increased to a degree, is also observed. The trend of NPSHr obtained by the simulation and experimental test is in general agreed. NPSHr increases with the rotational speed, which means that the anti-cavitation performance of the pump is deteriorated with the rotational speed.

PACS (2010): 47.32.-y

Acknowledgment

This work is financially supported by the National Natural Science Foundation of China (Project No. 51406185 and 51276172), The China Scholarship Council Project in 2012 (No. 201208330325), The Third Level 151 Talent Project in Zhejiang Province, and The Professional Leader Leading Project in 2013 (No. lj2013005).

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Received: 2014-11-26
Accepted: 2014-12-28
Published Online: 2015-1-17
Published in Print: 2015-9-1

©2015 by De Gruyter

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