大型风电叶片翼型气动噪声数值模拟研究  

Numerical Simulation of Aerodynamic Noise Generated by Large Wind Blade Airfoil

作　　者：李东旭[1] 梁鹏程[1] 戴龙侠[1] 胡杰桦[1] 侯彬彬[1] 彭超义[1] LI Dongxu LIANG Pengcheng DAI Longxia HU Jiehua HOU Binbin PENG Chaoyi(Zhuzhou Times New Material Technology Co., Ltd., Zhuzhou, Hunan 412007, China)

机构地区：[1]株洲时代新材料科技股份有限公司,湖南株洲412007

出　　处：《大功率变流技术》2017年第2期42-46,共5页HIGH POWER CONVERTER TECHNOLOGY

摘　　要：为降低风电叶片气动噪声,文章运用耦合计算流体力学和计算声学耦合方法对风电叶片翼型进行气动噪声数值模拟,利用流体动力学软件STAR-CCM+得到翼型表面压力分布并利用LMS Virtual.Lab软件得到翼型附近声场分布。研究发现:风电叶片气动噪声属于宽频噪声,添加尾缘锯齿后,随着攻角增大,在翼型附近监测点总噪声压级逐渐增大,在最佳攻角附近锯齿结构降噪效果最好;尾缘锯齿对中低频段的远场气动噪声有比较明显的降低效果。Aiming to reduce aerodynamic noise of wind blade, a method of coupling CFD/CAA was used to simulate the aerodynamic noise of wind blade airfoil. In this paper, surface pressure distribution of airfoil was obtained by using STAR-CCM＋ and the near sound field distribution of airfoil was obtained by using LMS virtual lab. Results show that wind blade aerodynamic noise belongs to broadband noise, and after adding serrations around trailing edge, the overall sound pressure level at monitoring points near the airfoil increases with the angle of attack increasing, and the serrated structure could achieve the best performance of noises reduction near the best angle of attack. The obvious effect on far-field aerodynamic noises reduction of low-middle frequency band can be achieved by serrated trailing edge.

关 键 词：风电叶片 翼型 计算流体力学 计算声学 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]