Journal of Fluid Science and Technology
Online ISSN : 1880-5558
Papers
Numerical Study of Vortex Structure in the Shear Layer between Swirling Backflow and Axial Main Flow
Akihiro ISHIMARUShinji FUKAOChisachi KATOYoshinobu TSUJIMOTO
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Volume 2 (2007) Issue 1 Pages 68-76

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Abstract

The present paper treats the backflow vortex structure observed at the turbomachinery inlet at reduced flow rate. It is caused by the roll-up of the shear layer between swirling backflow and axial main flow. In order to verify this, a simple model test was carried out in which the effect of impeller was represented by an axisymmetric swirling backflow. In the present paper, the flow field of a simplified model test is simulated by using LES calculations to investigate detailed flow structure. The computed results are compared with experimental results.

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© 2007 by The Japan Society of Mechanical Engineers
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