离心通风机整机三维流场的数值模拟  

Three-dimensional Flow Field Numerical Simulation of Centrifugal Fan

作　　者：徐长棱[1] 毛义军[1] 李凯[1] 谭佳建[1] 

机构地区：[1]西安交通大学流体机械研究所,西安市,710049

出　　处：《风机技术》2005年第5期1-4,共4页Chinese Journal of Turbomachinery

摘　　要：对前弯型离心通风机整机三维内流场进行了数值模拟,预测了叶轮的做功效率,通过与试验结果比较表明了计算的可信性。详细分析了风机内部流场情况,发现轮盖附近的流动分离现象使叶轮对流体的做功能力受到很大影响。通过对不同工况的计算,揭示了叶轮和蜗壳内部的二次流现象及其发展规律。通过比较,分析了蜗壳子午截面涡流产生的机理及其影响因素。A numerical simulation of the threedimensional inner-flow field in a forward-swept centrifugal fan is presented to predict the efficiency of impeller. The creditability of numeration is confirmed by comparing with the experimental result. The analysis of the flow field indicates that the flow separation near shroud had more badly influence on performance of impeller. The numerical analysis to different operating modes shows the developing laws of secondary flow inside volute and impeller. The mechanism of production and influencing factor of vortex in meridian plane of volute is analyzed.

关 键 词：离心式通风机 三维流场 数值模拟二次流 

分 类 号：TH432[机械工程—机械制造及自动化]