Open Access

ARTICLE

Influence of the Blade Bifurcated Tip on the Correlation between Wind Turbine Wheel Vibration and Aerodynamic Noise

by Baohua Li¹, Yuanjun Dai^1,2,*, Jingan Cui¹, Cong Wang¹, Kunju Shi¹

1 Mechanical College, Shanghai Dianji University, Shanghai, 201306, China
2 College of Energy Engineering, Xinjiang Institute of Engineering, Urumqi, 830091, China

* Corresponding Author: Yuanjun Dai. Email:

Fluid Dynamics & Materials Processing 2023, 19(12), 3033-3043. https://doi.org/10.32604/fdmp.2023.029583

Received 27 February 2023; Accepted 05 May 2023; Issue published 27 October 2023

Abstract

To reduce the vibration and aerodynamic noise of wind turbines, a new design is proposed relying on a blade with a bifurcated apex or tip. The performances of this wind turbine wheel are tested at the entrance of a DC (directaction) wind tunnel for different blade tip angles and varying centrifugal force and aerodynamic loads. The test results indicate that the bifurcated apex can reduce the vibration acceleration amplitude and the vibration frequency of the wind wheel. At the same time, the bifurcated apex can lower the maximum sound pressure level corresponding to the rotating fundamental frequency of the wind wheel. According to all these findings, the tip angle of the bifurcated apex is the main factor enhancing the effect of the modification.

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Keywords

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