排灌机械工程学报2025，Vol.43Issue(9)：898-904,7.DOI:10.3969/j.issn.1674-8530.23.0074
叶片尾缘形状对离心风机气动噪声的影响
Influence of blade trailing edge geometries on aerodynamic noise characteristics of centrifugal fan
摘要
Abstract
In order to improve the internal flow characteristics of centrifugal fans and mitigate aerody-namic noise,an investigation was conducted on centrifugal fans with different blade trailing edges.Spe-cifically,three different configurations with trailing edge of circular,circular-cut and elliptical were designed,all derived from a baseline square trailing edge model.The performance metrics,flow field distributions,and pressure pulsation of different models were analyzed through numerical simulation.Utilizing the Lighthill acoustic analogy theory,the influence of blade trailing edge geometries on the aerodynamic performance and acoustic characteristics of centrifugal fans was studied.The results show that there is a significant increase in total pressure and efficiency of the three blade trailing edge models under design condition,which are higher than those of the prototype model.The elliptical trailing edge model has the largest increase in total pressure and efficiency,increasing by 4.7％and 1.1％,respec-tively.The pressure pulsation amplitude observed in the three modified models is lower than that of the prototype model,and the elliptical trailing edge model exhibits the largest pressure pulsation reduction.The acoustic field calculation results show that the noise of centrifugal fan with circular trailing edge and circular trailing edge model decreases by 1.50 and 1.79 dB,respectively.Notably,the elliptical trailing edge model exhibits the best acoustic performance,and the noise value decreases by 2.10 dB.The aforementioned results show that a reasonable modification of the blade trailing edge geometry can effectively improve the internal flow conditions of a centrifugal fan,thereby reducing flow losses,in-creasing the efficiency and diminishing the aerodynamic noise.关键词
离心风机/尾缘形状/混合法/气动噪声/数值模拟Key words
centrifugal fan/trailing edge shape/hybrid method/aerodynamic noise/numerical simulation分类
农业科技引用本文复制引用
刘栋,张天泽,杨嵩,韩泳涛,金守清..叶片尾缘形状对离心风机气动噪声的影响[J].排灌机械工程学报,2025,43(9):898-904,7.基金项目
国家自然科学基金资助项目(51676086) （51676086）
