Investigation of similarity or dissimilarity in aerodynamic performance and noise pollution of H-Darrieus wind turbines

Zarei, Mohamad Javad; Bozorgi, Alireza

doi:10.22064/tava.2023.2001020.1224

Investigation of similarity or dissimilarity in aerodynamic performance and noise pollution of H-Darrieus wind turbines

Document Type : Research Article

Authors

Mohamad Javad Zarei ¹

Alireza Bozorgi ²

¹ M.Sc. Student, Department of Mechanical Engineering, University of Tehran, Tehran, Iran

² Assistant Professor, Department of Mechanical Engineering, Arak University of Technology, Arak, Iran

10.22064/tava.2023.2001020.1224

Abstract

This article investigates the impact of wind speed on the non-dimensional curve of the power coefficient-tip speed ratio and noise pollution of an H-Darrieus wind turbine. The Unsteady Reynolds-Averaged Navier-Stokes (URANS) and the SST-kω turbulence model are applied to simulate flow around the turbine at four wind speeds and four tip speed ratios. The results show no similarity in the aerodynamic performance when wind speed changes. Additionally, noise pollution is investigated using the Ffowcs Williams-Hawkings (FW-H) equations at the tip speed ratio of 2.64 for all wind speeds. The directivity is calculated at distances of 4 m and 16 m and angle positions of 0^o to 360^o. It is observed that although the noise behavior is more similar to the monopole form, the angle position has a considerable effect on the noise received by observers. Increasing the wind speed significantly amplifies the wind turbine noise, but there is no similarity in the directivity profiles obtained for all wind speeds. Finally, the frequency distribution is investigated, and the results show that the highest frequency is at blade passing frequency in all cases. However, the results based on rotor frequencies show no similarity in the shape of frequency distribution.

Highlights

Noise pollution, as a major problem in wind turbines performance is studied.
CFD results are found in a good agreement with experiments as compared with literature.
Increase in wind speed is found significantly amplifying wind turbine noise.
Angle position is found having a considerable effect on the noise received by observers.
No similarity is found in the C_p-λ curve of H-Darrieus wind turbines.

Keywords

VAWT

Noise pollution

Aeroacoustics

CFD

Aerodynamics

Subjects