Low-frequency noise prediction of wind turbines
by
Florin Frunzulica
Institute of Statistics and Applied Mathematics, Bucharest, ROMANIA
Coauthors: Horia Dumitrescu, Vladimir Cardos (Institute of Statistics and Applied Mathematics, Bucharest, Romania)

Nowadays wind turbines encounter more and more rising public resistance. People become annoyed by noisy turbines although the measured sound pressure levels (SPL) are below the regional limits particularly complains about low-frequency noise. Given the shape and motion of a wind turbine, the task is to determine the SPL at given location and to find out means to reduce noise. The problem requires two parts. First calculate the pressure distribution on the turbine. Next calculate the sound produced by this rotating pressure and volume distribution. The calculation of the pressure distribution is done by a lifting surface procedure. In this paper we present the calculation of the resulting sound field by applying the Ffowcs-Williams Hawkings equation in a form for computational simplicity.

Date received: January 29, 2004

Copyright © 2004 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cakt-44.