仿鸮翼前网罩对环状叶轮循环扇性能的影响

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关键词：循环扇；仿生设计；前网罩；环状叶轮；气动性能；噪声中图分类号：TH432.1;TK05文献标志码：ADOI：10.7652/xjtuxb202601013 文章编号： 0253-987X（2026）01-0127-10

Influence of Bionic Front Grille Inspired by Long-Eared Owl Wing on Performance of Circulation Fan with Annular Impeller

WU Xianpengl ，WEI Lai²，LUO Dan²，KANG Ruixiang²，LIU Xiaomin1 （1.School of Energy and Power Engineering，Xi'an Jiaotong University，Xi’an 71oo49，China; 2. GD Midea Environmental Electrical Appliance MFG Co.，Ltd.，Zhongshan，Guangdong ，China）

Abstract： To improve the aerodynamic performance and reduce the operating noise of circulating fans，a bionic front grille inspired by the wing profile of the long-eared owl is designed. The airfoil profile at the 40% wingspan cross-section of the long-eared owl's wing is extracted using reverse engineering methods，and a bionic front grille for the circulating fan is designed considering manufacturing requirements. The influence mechanism of the bionic long-eared owl-inspired front grille on the aerodynamic performance and noise of the circulating fan is investigated using numerical simulation methods. The performance of the circulating fan equipped with the bionic grille is validated through experimental testing. Simulation results indicate that，compared to the prototype fan，the circulating fan with the bionic long-eared owl-inspired front grille achieves a longer effective airflow distance，more concentrated airflow，and a more uniform wind field distribution.The bionic design of the front grille structure better aligns with the flow characteristics of the airflow accelerated by the annular impeller，reducing tip clearance and flow separation between grille channels， thereby effectively suppressing vortex formation and shedding. The turbulent kinetic energy intensity within the circulating fan is significantly reduced. Experimental results show that，compared to the prototype fan， the circulating fan with the bionic long-eared owl wing-inspired front grille reduces noise by 1.6dB at operating speed， increases maximum wind speed by 11.6% ， and maintains nearly unchanged power consumption. Under identical noise conditions，the maximum wind speed increases by 18.1% with a slight rise in power consumption. Under identical wind speed conditions，noise is reduced by 4.2dB and power consumption decreases by 24.6% ：

Keywords： circulation fan； bionic design； front mesh cover；annular impeller; aerodynamicperformance；noise

循环扇作为促进室内空气循环、改善居住环境舒适度的家用电器设备已得到广泛应用，其关键部件叶轮和网罩的结构设计对整机气动性能、流场状态及噪声水平均有重要影响。（剩余13405字）