%0 Journal Article
%T Aerodynamic study of a small horizontal-axis wind turbine
%A Mihai Leonida NICULESCU
%A Marius Gabriel COJOCARU
%A Cornelia NITA
%J INCAS Bulletin
%D 2012
%I National Institute for Aerospace Research ˇ°Elie Carafoliˇ± - INCAS
%R 10.13111/2066-8201.2012.4.2.8
%X The wind energy is deemed as one of the most durable energetic variants of the future because the wind resources are immense. Furthermore, one predicts that the small wind turbine will play a vital role in the urban environment. Unfortunately, nowadays, the noise emissions from wind turbines represent one of the main obstacles to widespread the use in populated zones. Moreover, the energetic efficiency of these wind turbines has to be high even at low and medium wind velocities because, usually the cities are not windy places. The numerical results clearly show that the wakes after the trailing edge are the main noise sources. In order to decrease the power of these noise sources, we should try to decrease the intensity of wakes after the trailing edge, i.e. the aerodynamic fields from pressure and suction sides would have to be almost the same near trailing edge. Furthermore, one observes a strong link between transport (circumferential) velocity and acoustic power level, i.e. if the transport velocity increases, the acoustic power level also augments.
%K horizontal-axis wind turbine
%K CFD
%K aeroacustics LES
%K aerodynamic study
%K transport velocity
%U http://bulletin.incas.ro/files/niculescu_cojocar_nita_v4_iss_2_fulli.pdf