变压器室通风机降噪特性研究  

Research on Noise Reduction Characteristics of Ventilator for Transformer Room

作　　者：冯金 陈佳 赵琳慧 FENG Jin;CHEN Jia;ZHAO Linhui(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;State Grid Changsha Power Supply Company,Changsha 410015,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]国网湖南省电力有限公司长沙供电分公司,湖南长沙410015

出　　处：《湖南电力》2021年第4期13-17,共5页Hunan Electric Power

基　　金：国家湖南省电力有限公司科技项目(5216A520000K)。

摘　　要：对比不同工况下锯齿尾缘风机流场特性和噪声特性,研究锯齿倾斜角对变压器室通风机气动性能、尾缘流场和噪声特性的影响规律及降噪机理。结果表明,增加锯齿尾缘可延迟边界层分离,减少尾缘涡量产生,尤其在中小流量下效果更明显。对比原型风机,采用锯齿尾缘可有效降低风机噪声。The paper compare the flow field characteristics and noise characteristics of the sawtooth tail foil in different working conditions.The influence law and noise reduction mechanism of inclining angles on aerodynamic performance, trailing edge flow and noise characteristics are studied. Results show that the boundary layer separation can be delayed and trailing edge vorticity generation can be reduced by adding a serrated trailing edge, especially at small and medium flow rates. Compared with the prototype ventilator, the sawtooth trailing edge can effectively reduce the noise of the ventilator.

关 键 词：变压器 通风机 噪声 大涡模拟 

分 类 号：TB53[理学—物理] TM403[理学—声学]