Effect of Swirl on Rotordynamic Forces Caused by Front Shroud Pump Leakage

Author:

Hsu Yun1,Brennen Christopher E.1

Affiliation:

1. California Institute of Technology, Mail Code 104-44, Pasadena, CA 91125

Abstract

Unsteady forces generated by fluid flow through the impeller shroud leakage path of a centrifugal pump were investigated. The effect of leakage path inlet swirl (pump discharge swirl) on the rotordynamic forces was re-examined. It was observed that increasing the inlet swirl is destabilizing both for normal and tangential rotordynamic forces. Attempts to reduce the swirl within the leakage path using ribs and grooves as swirl brakes showed benefits only at low leakage flow rate.

Publisher

ASME International

Subject

Mechanical Engineering

Reference10 articles.

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