Prediction of Aerodynamically Induced Vibrations in Turbomachinery Blading

[+] Author and Article Information
D. Hoyniak, S. Fleeter

Thermal Sciences and Propulsion Center, School of Mechanical Engineering, Purdue University, West Lafayette, Ind. 47907

J. Fluids Eng 105(4), 375-381 (Dec 01, 1983) (7 pages) doi:10.1115/1.3241013 History: Received October 14, 1982; Online October 26, 2009


To predict the aerodynamically forced response of an airfoil, an energy balance between the unsteady aerodynamic work and the energy dissipated through the airfoil structural and aerodynamic damping is performed. Theoretical zero incidence unsteady aerodynamic coefficients are then utilized in conjunction with this energy balance technique to predict the effects of reduced frequency, inlet Mach number, cascade geometry and interblade phase angle on the torsion mode aerodynamically forced response of the cascade. In addition, experimental unsteady aerodynamic gust data for flat plate and cambered cascaded airfoils are used together with these theoretical cascade unsteady self-induced aerodynamic coefficients to indicate the effects of incidence angle and airfoil camber on the forced response of the airfoil cascade.

Copyright © 1983 by ASME
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