Design of low noise wind turbine blades using Betz and Joukowski concepts

The Science of Making Torque from Wind 2014

Shen, W.Z.^1 ; Hrgovan, I.^1 ; Okulov, V.^1 ; Zhu, W.J.^1 ; Madsen, J.^2

Department of Wind Energy, Technical University of Denmark, DK-2800 Lyngby, Denmark^1

LM Wind Power, Jupitervej 6, 6000 Kolding, Denmark^2

关键词: Aerodynamic designs;    Aerodynamic modeling;    Blade element momentum theory;    Noise emissions;    Performance analysis;    Prediction model;    Virginia Tech;    Wind turbine blades;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012131/pdf
DOI  :  10.1088/1742-6596/524/1/012131

来源: IOP

【 摘 要 】

This paper presents the aerodynamic design of low noise wind turbine blades using Betz and Joukowski concepts. The aerodynamic model is based on Blade Element Momentum theory whereas the aeroacoustic prediction model is based on the BPM model. The investigation is started with a 3MW baseline/reference turbine rotor with a diameter of 80 m. To reduce the noise emission from the baseline rotor, the rotor is reconstructed with the low noise CQU-DTU-LN1 series of airfoils which has been tested in the acoustic wind tunnel located at Virginia Tech. Finally, 3MW low noise turbine rotors are designed using the concepts of Betz and Joukowski, and the CQU-DTU-LN1 series of airfoils. Performance analysis shows that the newly designed turbine rotors can achieve an overall noise reduction of 6 dB and 1.5 dB(A) with a similar power output as compared to the reference rotor.