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RESEARCH PAPERS

The Application of Particle Image Velocimetry (PIV) in a Short-Duration Transonic Annular Turbine Cascade

[+] Author and Article Information
P. J. Bryanston-Cross, C. E. Towers, T. R. Judge, D. P. Towers

Department of Engineering, University of Warwick, Coventry, United Kingdom

S. P. Harasgama, S. T. Hopwood

Propulsion Department, Royal Aerospace Establishment, Pyestock, Farnborough, Hampshire, United Kingdom

J. Turbomach 114(3), 504-509 (Jul 01, 1992) (6 pages) doi:10.1115/1.2929173 History: Received March 04, 1991; Online June 09, 2008

Abstract

A series of experiments have been performed to demonstrate the application of Particle Image Velocimetry (PIV) to turbomachinery flows. The tests were performed at transonic speeds on a fully annular engine size turbine nozzle guide vane. The vane cascade was installed in a short-duration Isentropic Light Piston Cascade (ILPC) test facility operating with high inlet turbulence levels. The technique has been shown to map the whole flow field with a resolution of 0.5 mm. The quality of the results obtained is not significantly affected by local turbulence rates. The accuracy of the measurements is put at around 4 percent of absolute velocity and is limited by the quality of the image on the film plane. The velocities derived from the PIV images have been compared with predictions from a three-dimensional viscous numerical calculation. It is shown that the experimental and predicted results are in good agreement. It is considered that this technique has considerable potential in application to turbomachinery flow field diagnostics.

Copyright © 1992 by The American Society of Mechanical Engineers
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