Turbulence Characteristics in the Annulus-Wall Boundary Layer and Wake Mixing Region of a Compressor Rotor Exit

[+] Author and Article Information
R. Davino, B. Lakshminarayana

Department of Aerospace Engineering, The Pennsylvania State University, University Park, Pa. 16802

J. Eng. Power 104(3), 561-570 (Jul 01, 1982) (10 pages) doi:10.1115/1.3227317 History: Received December 15, 1980; Online September 28, 2009


The flow at the exit of a turbomachinery rotor near the annulus wall is three-dimensional with a varying degree of turbulence and nonisotropic characteristics. The characteristics of the turbulence vary considerably with radial and axial location, blade loading, Reynolds number, free-stream turbulence, and the rotor blade geometry. This paper is concerned with the turbulence properties near the annulus wall region of a moderately loaded compressor blade. The variation of the streamwise, normal, and radial intensities as well as the stresses across the wake, its profile and decay characteristics, were determined with a tri-axial hot-wire probe in the stationary frame of reference. The turbulence characteristics in the annulus-wall region of the rotor exit were found to be highly complex due to the interaction of the blade wake and the annulus wall.

Copyright © 1982 by ASME
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