In this study, a numerical method aiming at modeling wind turbine noise in the low frequency range is presented. It is based on the coupling of an existing time-domain aeroelastic code for wind turbine applications called HAWC2, and the so-called Formulation 1A by Farassat (1) which is designed to compute the thickness and loading noise generated by moving objects in the time-domain. The numerical results of this code are analyzed in detail. The influence of various numerical parameters on the quality of the results is evaluated. It is shown that the present model compares relatively well with Viterna's model (2) for the prediction of low frequency noise fromrotors, and with the turbulent inflow noise theory for airfoils by Amiet (3) over a specific frequency range. Various atmospheric turbulence intensities and geometrical configurations are considered. Finally, the influence of the wake of an operating turbine located upstream of the noise generatingturbine is investigated.
|Title of host publication||46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017|
|Publication status||Published - 2017|
|Event||Internoise 2017: 46th international congress and exposition on noise control engineering - Hong Kong Convention and Exhibition Centre, Hong Kong, Hong Kong|
Duration: 27 Aug 2017 → 30 Aug 2017
|Location||Hong Kong Convention and Exhibition Centre|
|Period||27/08/2017 → 30/08/2017|