波形前缘结构对风力机气动噪声特性的影响

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中图分类号：TB17 文献标志码：A

Influence of wavy leading-edge structure on aerodynamic noise characteristics of wind turbines

Abstract： To investigate the aerodynamic noise characteristics of wind turbine blades featuring leading-edge tubercles inspired by humpback whale flippers， a numerical simulation of the wind turbine was conducted using large eddy simulation and acoustic analogy methods. The results show that under rated wind speed conditions， the wavy leading-edge structure increases the wind turbine's power coeficient across various tip-speed ratios， with a maximum improvement of approximately 12% . As frequency increases， the sound pressure levels of both the original and the bionic wind turbines decrease at all monitoring points， with the bionic turbine consistently exhibiting lower sound pressure levels than the original one. The reduction ranges from about O.1 to 4.5dB 0 corresponding to a maximum noise reduction rate of around 6.5% . The wavy leading-edge structure accelerates the vortex shedding frequency and the dissipation rate of vortex clusters in the wake， resulting in lower aerodynamic noise for the wind turbine blade with the wavy leading-edge structure compared to the original design.

Keywords： wavy leading edge; sound pressure level; noise radiation characteristics; wind turbine

近年来，随着国内风能资源不断被开发利用，由此产生的环境问题引起人们的高度重视，例如，风力机噪声问题。（剩余7060字）