Hydrodynamic Measurements of Jets in Crossflow for Gas Turbine Film Cooling Applications

[+] Author and Article Information
J. R. Pietrzyk, D. G. Bogard, M. E. Crawford

Mechanical Engineering Department, The University of Texas at Austin, Austin, TX 78712

J. Turbomach 111(2), 139-145 (Apr 01, 1989) (7 pages) doi:10.1115/1.3262248 History: Received January 01, 1988; Online November 09, 2009


This paper presents the results of a detailed hydrodynamic study of a row of inclined jets issuing into a crossflow. Laser-Doppler anemometry was used to measure the vertical and streamwise components of velocity for three jet-to-mainstream velocity ratios: 0.25, 0.5, and 1.0. Mean velocity components and turbulent Reynolds normal and shear stress components were measured at locations in a vertical plane along the centerline of the jet from 1 diameter upstream to 30 diameters downstream of the jet. The results, which have application to film cooling, give a quantitative picture of the entire flow field, from the approaching flow upstream of the jet, through the interaction region of the jet and mainstream, to the relaxation region downstream where the flow field approaches that of a standard turbulent boundary layer. The data indicate the existence of a separation region in the hole from which the jet issues, causing high levels of turbulence and a relatively uniform mean velocity profile at the jet exit.

Copyright © 1989 by ASME
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