Influence of tip clearance and swept modification on a mixed-flow water-jet pump

  • ZHONG Jing-jun ,
  • WANG Hong-rui ,
  • Han Ji-ang
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  • (Marine Engineering College,Dalian Maritime University,Dalian 116026,China)

Received date: 2014-11-24

  Revised date: 2014-12-09

  Online published: 2014-12-09

Abstract

A water jet mixed-flow pump was regarded as an object. CFD simulate was carried out by using three dimensional Reynolds averaged N-S equation and S-A turbulent model. The purpose was to study the influence of different tip clearance on characteristics of pump and flow loss, further more swept modifications were made to reduce gap losses. Results show that the tip clearance could reduce the pressure gap between PS and SS, moreover control backflow at outlet of impeller, for this pump 0.6 mm was the watershed. The appropriate swept modifications could help to reduce the tip clearance losses, +5°swept improve the efficiency with a flat power curve.

Cite this article

ZHONG Jing-jun , WANG Hong-rui , Han Ji-ang . Influence of tip clearance and swept modification on a mixed-flow water-jet pump[J]. Journal of Dalian Maritime University, 2015 , 41(3) : 77 -81 . DOI: 10.16411/j.cnki.issn1006-7736.2015.03.014

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