Numerical Study on the Fluid-Structure Interaction and Aerodynamic Noise Radiation of a Membrane Airfoil.

Abstract

This paper investigates the fuid-structure interaction phenomena and their effect on the aerodynamic noise radiation observed for a membrane airfoil subjected to a turbulent flow at a fixed angle of attack α= 20° . For this purpose, two cases with different Reynolds numbers (Re = 53,100 and Re = 79,700) are simulated. The applied partitioned fluid-structure interaction approach uses large eddy simulations to predict the incompressible flow problem and includes geometric non-linear effects for the structural problem. Following a hybrid method based on a hydrodynamic/acoustic splitting technique, the incompressible flow field solution provides the acoustic source term for the aeroacoustic computation. The results suggest a coupling between the vortex shedding, the dynamic structural response and the radiated aerodynamic sound for this configuration.

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