Unsteady Aerodynamic Analysis of Subsonic Oscillating Cascade

[+] Author and Article Information
S. H. Chen, A. H. Eastland, E. D. Jackson

Rocketdyne Division, Rockwell International Corporation, Canoga Park, CA 91303

J. Turbomach 116(3), 501-512 (Jul 01, 1994) (12 pages) doi:10.1115/1.2929439 History: Received March 01, 1992; Online June 09, 2008


This paper describes the development of the source-doublet-based potential paneling method for oscillating cascade unsteady aerodynamic load predictions. By using the integral influence coefficient method and by using the interblade phase angles, the unsteady loads on an oscillating cascade can be accurately predicted at a minimum cost. As the grids are placed only on the blade surfaces, the blades are allowed to vibrate without grid deformation problems. Four notable subsonic oscillating cascade test cases that cover most important parameters, e.g., blade geometry, interblade phase angle, flow coefficient, flow speed, frequency, etc., are studied in this paper. The agreement between the present solutions and other numerical/experimental results demonstrates the robustness of the present model. Applicability of the method for realistic compressible flow cascades is also discussed.

Copyright © 1994 by The American Society of Mechanical Engineers
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