Three-Dimensional Unsteady Flow and Forces in Centrifugal Impellers With Circumferential Distortion of the Outlet Static Pressure-Reference-Cited by-同舟云学术

Three-Dimensional Unsteady Flow and Forces in Centrifugal Impellers With Circumferential Distortion of the Outlet Static Pressure

Published:1997-01-01 Issue:1 Volume:119 Page:94-102
ISSN:0889-504X
Container-title:Journal of Turbomachinery
language:en
Short-container-title:

Author:

Fatsis A.¹,Pierret S.¹,Van den Braembussche R.¹

Affiliation:

1. Turbomachinery Department, von Karman Institute for Fluid Dynamics, Rhode-St-Gene`se, Belgium

Abstract

This paper describes the numerical investigation of the centrifugal impeller response to downstream static pressure distortions imposed by volutes at off-design operations. An unsteady three-dimensional Euler solver with nonreflecting upstream and down-stream boundary conditions and phase-lagged periodicity conditions is used for this purpose. The mechanisms governing the unsteady flow field are analyzed. A parametric study shows the influence of the acoustic Strouhal number on the amplitude of the flow perturbations. Radial forces calculated on backward leaned and radial ending centrifugal impellers show nonnegligible influence of the impeller geometry.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/turbomachinery/article-pdf/119/1/94/5840612/94_1.pdf

Reference17 articles.

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3. Childs D. W. , 1992, “Pressure Oscillation in the Leakage Annulus Between a Shrouded Impeller and Its Housing Due to Impeller-Discharge-Pressure Disturbances,” ASME Journal of Fluids Engineering, Vol. 114, pp. 61–67.

4. Croba, D., 1992, “Mode´lisation de l’e´coulement instationnaire dans les pompes centrifuges. Interaction roue-volute,” Ph.D.thesis, Institut National Polytechnique de Grenoble.

5. Eckardt D. , 1976, “Detailed Flow Investigations Within a High-Speed Centrifugal Compressor Impeller,” ASME Journal of Fluids Engineering, Vol. 98, pp. 390–402.

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