蜗舌尺寸结构对离心风机性能及运行噪声影响研究  

Influence of Dimension and Structure of Volute Tongue on Performance and Operation Noise of Centrifugal Fans

作　　者：李保航 丁问司[1] LI Baohang;DING Wensi(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广州510641

出　　处：《噪声与振动控制》2025年第1期84-88,共5页Noise and Vibration Control

摘　　要：为探究蜗舌与叶轮间隙t、蜗舌圆角r等结构尺寸对离心风机性能和运行噪声的影响,以某一叶轮出口直径D_(2)=630 mm的后向离心风机为研究对象,通过实验验证了数值模拟的可行性、正确性,通过实验分析发现,对于t/D_(2)在0.016~0.05,以及r/D_(2)在0.008~0.04的区间内的25种组合,风机效率变化均在2%以内,r/D_(2)=0.024比r/D_(2)=0.008时的噪声低1.1 d B,t/D_(2)=0.042比t/D_(2)=0.016时的噪声低3.7 d B。可以发现在实验取值变化范围内风机性能并不发生大的变化,而噪声受到的影响显著。分析发现,在t/D_(2)=0.016时风机噪声大幅提升,在其余参数范围内风机噪声随着蜗舌圆角和间隙的增大而降低,此可为风机降噪优化提供指导。In order to explore the influence of the gap t between the volute tongue and the impeller and the fillet r of the volute tongue on the performance and operating noise of the centrifugal fan,a backward centrifugal fan with an impeller outlet diameter D_(2)=630 mm was researched.The feasibility and correctness of the numerical simulation of the centrifugal fan were verified by experiments.Through experimental analysis,it is found that the fan efficiency changes within 2%for 25 combinations of t/D_(2)in the range of 0.016-0.05 and r/D_(2)in the range of 0.008-0.04.The noise of r/D_(2)=0.024 is 1.1 dB lower than that of r/D_(2)=0.008,and the noise of t/D_(2)=0.042 is 3.7 dB lower than that of t/D_(2)=0.016.It can be found that the performance of the fan does not change greatly within the change of the experimental value,but the noise of the fan changes greatly.The fan noise increases greatly when t/D_(2)=0.016,and the fan noise decreases with the increase of volute tongue fillet and gap in other ranges of the parameters.This finding provides a guidance for fan noise reduction.

关 键 词：声学 蜗舌 离心风机 气动噪声 CFD 降噪 

分 类 号：TH432[机械工程—机械制造及自动化] TB53[理学—物理]