Prediction of broadband trailing-edge noise based on Blake model and Amiet theory

Stalnov, O., Chaitanya, P. and Joseph, P. F. (2016) Prediction of broadband trailing-edge noise based on Blake model and Amiet theory. In 21st AIAA/CEAS Aeroacoustics Conference. American Institute of Aeronautics and Astronautics.. (doi:10.2514/6.2015-2526).

Abstract

This paper extends previously published TNO-Blake methods to predict airfoil broadband self-noise due to interaction of a turbulent boundary-layer with a sharp trailing edge. The method presented herein combines Blake’s model to predict surface pressure fluctuations and Amiet model to predict trailing edge noise emission. The Blake method is based on the solution of the Poisson equation as an integral of the mean-shear turbulent source interaction source, over the entire boundary layer thickness. A recent advances in description of streamwise turbulent intensity are employed. Surface pressure spectra are measured with remote microphones and compared to the prediction. In the next step, the wavenumber- frequency spectrum as predicted by the TNO model was utilized as an input to the Amiet model to evaluate the far-field trailing edge noise.

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