25th Congress of International Council of the Aeronautical Sciences, 3 - 8 September 2006, Hamburg, Germany
Paper ICAS 2006-2.10.3

COMPUTATIONAL AEROACOUSTIC PREDICTION OF TRANSONIC ROTOR NOISE BASED ON REYNOLDS-AVERAGED N-S FLOW SIMULATION

W. P. Song, Z. H. Han, Z. D. Qiao
Northwestern Polytechnical Univ., China

Keywords: Computational Aeroacoustics, helicopter rotors , Navier-Stokes equations, aeroacoustic noise, Ffowcs Williams-Hawking equation

An efficient and accurate method for predicting the aeroacoustic noise generated by transonic helicopter rotors was investigated. The near-field noise was calculated by solving Reynolds-Averaged Navier-Stokes equations using chimera grid methodology. The far-field noise was predicted by using Ffowcs Williams-Hawkings method, with integration surface covering the nonlinear flow region.

view full paper