Flow phenomena in swirl chambers

Flow phenomena in swirl chambers  Results are presented from two different swirl chambers. One of the practical directions for this study is simulation of cooling passages located near the leading edges of turbine blades where screw-shaped, swirling flows are generated to enhance heat transfer. Flow visualization results are given at Reynolds numbers ranging from 900 to 19,000, along with example surveys of mean velocity components, static pressure, and total pressure. Arrays of Görtler vortices are evident along the concave surface of the chamber, in addition to a second array in the shear layer located a short distance from the wall. As Reynolds number increases, vortex pair unsteadiness increases, the number of vortex pairs across the span increases, and interactions between adjacent vortex pairs becomes more intense, chaotic, and frequent. With axial flow components in the swirl chambers, skewness, unsteadiness, and three-dimensionality of the larger Görtler vortices become even more pronounced as they continuously intermingle with smaller Görtler vortex pairs. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals
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Publisher
Springer-Verlag
Copyright
Copyright © 1998 by Springer-Verlag Berlin Heidelberg
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s003480050172
Publisher site
See Article on Publisher Site

Abstract

 Results are presented from two different swirl chambers. One of the practical directions for this study is simulation of cooling passages located near the leading edges of turbine blades where screw-shaped, swirling flows are generated to enhance heat transfer. Flow visualization results are given at Reynolds numbers ranging from 900 to 19,000, along with example surveys of mean velocity components, static pressure, and total pressure. Arrays of Görtler vortices are evident along the concave surface of the chamber, in addition to a second array in the shear layer located a short distance from the wall. As Reynolds number increases, vortex pair unsteadiness increases, the number of vortex pairs across the span increases, and interactions between adjacent vortex pairs becomes more intense, chaotic, and frequent. With axial flow components in the swirl chambers, skewness, unsteadiness, and three-dimensionality of the larger Görtler vortices become even more pronounced as they continuously intermingle with smaller Görtler vortex pairs.

Journal

Experiments in FluidsSpringer Journals

Published: Mar 19, 1998

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