改变蜗壳结构对离心风机性能及噪音的影响  

Effect of Volute Configuration on Aerodynamic Performance and Noise Level of the Centrifugal Fan

作　　者：雷乐[1] 谭俊飞 李景银[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]中冶赛迪工程技术股份有限公司,重庆400013

出　　处：《工程热物理学报》2015年第12期2604-2607,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51276137)

摘　　要：利用Ansys Fluent软件进行数值模拟,通过分别改变蜗壳宽度和蜗舌倾角的方法,详细研究了改变蜗壳结构对离心风机气动性能及声功率级的影响。研究结果显示,在离心风机设计推荐范围内存在最佳蜗壳宽度,使得离心风机的声功率级最低;增加蜗壳宽度,离心风机的全压、效率略有下降,静压升高;固定离心风机蜗壳后盖板蜗舌半径R_1,增大蜗壳前盖板蜗舌半径R_2,能有效地降低离心风机的声功率级;在降噪效果上,改变蜗舌间隙优于改变蜗舌倾角.The effect of the variation in volute widths and inclining angles of the volute tongue on the aerodynamic characteristics and sound power levels of a centrifugal fan was simulated and analyzed by using Ansys Fluent.It is found that there is an optimal volute width leading to the lowest sound power level within the recommended range of design parameters.And an increase in the volute width leads to an increase in the static pressure with a slight decrease in the total pressure and efficiency.In addition,the sound power level can be reduced by fixing the volute tongue radius R1 at the volute rear plate and increasing its radius R2 at the volute front plate.Changing the volute tongue clearance has a better noise reduction effect than the variation of the inclining angle.

关 键 词：离心风机 声功率级 倾斜蜗舌 蜗壳宽度 

分 类 号：TH43[机械工程—机械制造及自动化]