摘要
为降低风力机的气动噪声,提出一种用于小型风力机的双叉式叶尖结构改型设计方案,在风洞实验室开展了风力机外特性测试与气动噪声试验。试验结果表明:双叉式叶尖结构在3~9 m/s的低风速段和中风速段能提高风力机的输出功率;双叉式叶尖结构可降低风力机风轮旋转基频所对应的最大声压级与叶尖涡脱落频率所对应的声压级。由此可知双叉式叶尖结构能有效降低风力机的气动噪声,其中叶尖夹角为90°的双叉式叶尖结构降噪性能最优。
In order to reduce the aerodynamic noise of the wind turbine,a modified design scheme of the double fork blade tip structure for small wind turbines was proposed.The wind turbine external characteristics test and aerodynamic noise test were carried out in the wind tunnel laboratory.The test results show that the double fork blade tip structure can improve the output power of the wind turbine in the low wind speed section and the middle wind speed section of 3~9 m/s.The double fork blade tip structure can reduce the maximum sound pressure level corresponding to the rotating fundamental frequency of wind wheel and the sound pressure level corresponding to the blade tip vortex shedding frequency of wind wheel.It can be seen that the double fork blade tip structure can effectively reduce the aerodynamic noise of the wind turbine,and the double fork blade tip structure with the tip angle of 90°is of the best noise reduction performance.
作者
代元军
贺凯
李保华
翟明成
DAI Yuan-jun;HE Kai;LI Bao-hua;ZHAI Ming-cheng(Mechanical College,Shanghai Dianji University,Shanghai 201306,China;College of Mechanical and Electrical Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Key Laboratory of Energy Efficient Utilization Technology,Xinjiang Institute of Engineering,Urumqi 830091,China)
出处
《科学技术与工程》
北大核心
2021年第7期2693-2698,共6页
Science Technology and Engineering
基金
国家自然科学基金(51966018,51466015)
新疆维吾尔自治区天山英才项目(2018xgytsyc2-1-5)。
关键词
风力机
双叉式叶尖结构
气动噪声
旋转基频
叶尖涡脱落频率
wind turbine
double fork blade tip structure
aerodynamic noise
rotating fundamental frequency
blade tip vortex shedding frequency
