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Numerical Analysis of Bionic Blades Applied in Centrifugal Fan

来源：花匠小妙招时间：2025-04-30 06:40

为了探究仿生叶片对离心风机气动性能、流场和声场的影响，将波形前缘、锯齿尾缘和表面凹坑3种仿生结构应用在离心风机叶片上，并对其流动和噪声辐射进行了数值计算。结果表明：表面凹坑结构抑制了叶片吸力面上的分离流，提升了离心风机的全压和效率，但蜗壳壁面附近的压力脉动幅值增大，最终使噪声不降反增0.85 dB；锯齿尾缘型风机虽然做功能力下降，但依然保持高效率，叶轮内流动状况改善，压力脉动明显削弱，总声压级平均下降5.04 dB；波形前缘型风机气动性能与原型相比略有提升但相差不大，整体降噪3.14 dB。

Abstract

In order to study the influence of bionic blades on the aerodynamic characteristics, flow and sound fields of centrifugal fan, three types of bionic structures including corrugated leading edge, serrated trailing edge and surface pits were applied on centrifugal fan blades, and the flow and noise radiation for each structure were numerically calculated. Results show that for the structure of surface pits, it suppresses the separation flow on the suction surface of blades and improves the total pressure and efficiency of the fan, however, the pressure pulsation near the wall of the volute increases, and finally the noise of the fan goes up by 0.85 dB; for the structure of serrated trailing edge, the power capacity of the fan is decreased, but the high efficiency can still be maintained, at the same time the flow in the impeller is improved and the pressure pulsation is significantly weakened, finally the total sound pressure level is reduced by an average of 5.04 dB; for the structure of corrugated leading edge, the aerodynamic performance of the fan is slightly improved compared with the prototype, and the whole noise reduction is 3.14 dB.

关键词

仿生结构 /离心风机 /气动特性 /压力脉动 /声压级{{custom_keyword}} /

Key words

bionic structure /centrifugal fan /aerodynamic characteristics /pressure pulsation /sound pressure level{{custom_keyword}} /

邬长乐, 陈二云, 杨爱玲, 李国平.仿生叶片在离心风机上应用的数值分析. 动力工程学报. 2021, 41(4): 301-308 https://doi.org/10.19805/j.cnki.jcspe.2021.04.007

WU Changle, CHEN Eryun, YANG Ailing, LI Guoping.Numerical Analysis of Bionic Blades Applied in Centrifugal Fan. Journal of Chinese Society of Power Engineering. 2021, 41(4): 301-308 https://doi.org/10.19805/j.cnki.jcspe.2021.04.007

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