Noise generation by turbulence interacting with an aerofoil with a serrated leading edge

摘要

This study considers the interaction of turbulence with a serrated leading edge. We investigate the noise produced by an aerofoil moving through a turbulent perturbation to uniform flow by considering the scattered pressure from the leading edge. To do this we develop an analytical model which allows us to consider both deterministic eddies and turbulence. We show that it is possible to reduce the noise by using a serrated leading edge compared with a straight edge, but the optimal noise-reducing choice of serration is hard to predict.