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Damping loss in a cascade of fluttering phased aerofoils

Published online by Cambridge University Press:  09 April 2009

B. S. Thornton
B. S. Thornton
Affiliation:
Honeywell E. D. P.Division 55 Macquarie St, Sydney
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Summary

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A study is made of the aerodynamic damping in a cascade of oscillating aerofoils in subsonic compressible flow with the system mode described by a constant interblade phasing predicted by Lane (9). The integral downwash equation is obtained as an extension of Possio's equation for an isolated aerofoil. Procedures for a practical solution of the equation have allowed the aerodynamic reactions and damping derivatives to be evaluated with a digital computer after minimisation of the critical flutter velocity with respect to interbiade phase angle. The effect of aerodynamic lag in separation conditions as a function of reduced frequency and chordwise location is compared with results without separation.

Type
Research Article
Information
Journal of the Australian Mathematical Society , Volume 8 , Issue 2 , May 1968 , pp. 327 - 344
Copyright
Copyright © Australian Mathematical Society 1968

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