Tone Noise Prediction of a Propeller Operating in Non-uniform Flows

摘要

This paper examines the tone noise generation by propellers operating in a non-uniform mean flow. A numerical approach is proposed, based in the frequency domain, for predicting far-field propeller noise, which requires the aerodynamic sources to be integrated over the actual blade surface, rather than over the mean-chord surface. The prediction of the radiated far-field tonal noise for a four-bladed propeller operating in a non-uniform mean flow is performed.