Turbulence Production Due to Secondary Vortex Cutting in a Turbine Rotor

[+] Author and Article Information
A. Binder

DFVLR-Propulsion Institute, Cologne, W. Germany

J. Eng. Gas Turbines Power 107(4), 1039-1046 (Oct 01, 1985) (8 pages) doi:10.1115/1.3239808 History: Received January 16, 1985; Online October 15, 2009


Measurements of the unsteady flow field near and within a turbine rotor were made by means of a Laser-2-Focus velocimeter. The testing was performed in a single-stage cold-air turbine at part-load and near-design conditions. Random unsteadiness and flow angle results indicate that the secondary vortices of the stator break down after being cut and deformed by the rotor blades. A quantitative comparison shows that some of the energy contained in these secondary vortices is thereby converted into turbulence energy in the front part of the rotor. An attempt is made to explain this turbulence energy production as caused by the vortex breakdown.

Copyright © 1985 by ASME
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