Numerical Solutions for Unsteady Subsonic Vortical Flows Around Loaded Cascades

[+] Author and Article Information
J. Fang, H. M. Atassi

Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556

J. Turbomach 115(4), 810-816 (Oct 01, 1993) (7 pages) doi:10.1115/1.2929319 History: Received February 17, 1992; Online June 09, 2008


A frequency domain linearized unsteady aerodynamic analysis is presented for three-dimensional unsteady vortical flows around a cascade of loaded airfoils. The analysis fully accounts for the distortion of the impinging vortical disturbances by the mean flow. The entire unsteady flow field is calculated in response to upstream three-dimensional harmonic disturbances. Numerical results are presented for two standard cascade configurations representing turbine and compressor bladings for a reduced frequency range from 0.1 to 5. Results show that the upstream gust conditions and blade sweep strongly affect the unsteady blade response.

Copyright © 1993 by The American Society of Mechanical Engineers
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