Broadband noise prediction for aerofoils with a serrated trailing edge based on Amiet’s theory

Trailing-edge serrations are used as means to reduce aerofoil broadband self-noise in various industrial applications. However, a reliable prediction of the reduced noise level has not been established date. In this paper, authors suggest that Amiet’s theory can be accurately predict sound radiated from serrated trailing edges. A plausible explanation how classical theory, originally derived non-serrated (straight) edges, also works for edges is provided. Besides, propose directivity correction original model account realistic geometry. The provides significantly improved upstream and downstream directions both baseline edge cases. This study based on wall-resolved large-eddy simulations Joukowski aerofoils with multiple serration geometries different flow conditions.