叶尖结构变化对风力机噪声源分布特性的影响  

Influence of Blade Tip Structure Change on Noise Source Distribution Characteristics of Wind Turbine

作　　者：代元军 姜金榜[1] 李保华 郭程 DAI Yuan-jun;JIANG Jin-bang;LI Bao-hua;GUO Cheng(College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi 830052, China;Mechanical College, Shanghai DianJi University, Shanghai 201306, China;Key Laboratory of Energy Efficient Utilization Technology, Xinjiang Institute of Engineering, Urumqi 830091, China)

机构地区：[1]新疆农业大学机电工程学院,乌鲁木齐830052 [2]上海电机学院机械学院,上海201306 [3]新疆工程学院能源高效利用技术重点试验室,乌鲁木齐830091

出　　处：《科学技术与工程》2021年第18期7532-7536,共5页Science Technology and Engineering

基　　金：国家自然科学基金(51966018,51466015);新疆高校科研计划自然科学重点项目(XJEDU2019I027)。

摘　　要：为探究由水平轴风力机叶尖结构变化所造成的风力机噪声源分布特性的规律,利用圆盘声阵列系统对不同叶尖结构风力机采用近场声全息技术和远场波束形成技术进行噪声源识别。采集得到运行中的水平轴风力机在额定工况下的噪声信号,分析了噪声源声压级变化情况以及风力机噪声声源位置的分布规律。结果表明:叶尖结构变化可以有效降低风力机的气动噪声,改变了风力机叶尖噪声的强度和产生位置,在一定程度上降低了叶尖噪声。通过对风力机叶尖结构的优化设计可以在不损害风力机气动性能的同时,实现较好的降噪效果。To explore the distribution characteristics of noise source of wind turbine caused by the tip structure of horizontal axis wind turbine,by using disk acoustic array system,near-field acoustic holographic technology and far-field beamforming technology were adopted.The noise signal of the operating horizontal axis wind turbine were collected under the rated working condition,the change of sound pressure level and distribution law of wind turbine were analyzed.The results show that the tip structure can reduce aerodynamic noise of wind turbine,changtering the strength and production position of wind turbine tip noise,reduced the leaf tip noise to a certain extent.Through optimal design of the turbine tip structure without damaging the aerodynamic performance,realized a great noise reduction effect.

关 键 词：风力机 叶尖结构 叶尖噪声 声源定位 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]