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Transonic flutter, shocks, and parameter effects

Pradeepa, TK and Venkatraman, Kartik (2012) Transonic flutter, shocks, and parameter effects. In: 8th Congress of the International Council of the Aeronautical Sciences, 23-28 September 2012, Brisbane, Australia.

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Abstract

There is a drop in the flutter boundary of an aeroelastic system placed in a transonic flow due to compressibility effects and is known as the transonic dip. Viscous effects can shift the lo-cation of the shock and depending on the shock strength the boundary layer may separate leading to changes in the flutter speed. An unsteady Euler flow solver coupled with the structural dynamic equations is used to understand the effect of shock on the transonic dip. The effect of various system parameters such as mass ratio, location of the center of mass, position of the elastic axis, ratio of uncoupled natural frequencies in heave and pitch are also studied. Steady turbulent flow results are presented to demonstrate the effect of viscosity on the location and strength of the shock.

Item Type: Conference Paper
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Additional Information: Copyright of this article belongs to International Council of the Aeronautical Sciences.
Keywords: Transonic Flow; Transonic Flutter; Limit Cycle; Static Divergence; Energy Transfer
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 07 Mar 2014 06:57
Last Modified: 07 Mar 2014 06:57
URI: http://eprints.iisc.ernet.in/id/eprint/48538

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