Influence of the Blade Bifurcated Tip on the Correlation between Wind Turbine Wheel Vibration and Aerodynamic Noise  

作　　者：Baohua Li Yuanjun Dai Jingan Cui Cong Wang Kunju Shi 

机构地区：[1]Mechanical College,Shanghai Dianji University,Shanghai,201306,China [2]College of Energy Engineering,Xinjiang Institute of Engineering,Urumqi,830091,China

出　　处：《Fluid Dynamics & Materials Processing》2023年第12期3033-3043,共11页流体力学与材料加工（英文）

基　　金：supported by the National Natural Science Foundation Project under Grant Numbers[51966018,51466015].

摘　　要：To reduce the vibration and aerodynamic noise of wind turbines,a new design is proposed relying on a blade with a bifurcated apex or tip.The performances of this wind turbine wheel are tested at the entrance of a DC(direct-action)wind tunnel for different blade tip angles and varying centrifugal force and aerodynamic loads.The test results indicate that the bifurcated apex can reduce the vibration acceleration amplitude and the vibration fre-quency of the wind wheel.At the same time,the bifurcated apex can lower the maximum sound pressure level corresponding to the rotating fundamental frequency of the wind wheel.According to all thesefindings,the tip angle of the bifurcated apex is the main factor enhancing the effect of the modification.

关 键 词：Wind turbine bifurcated apex wind wheel vibration aerodynamic noise 

分 类 号：O32[理学—一般力学与力学基础]