离心式通风机整机三维数值模拟分析  

Numerical Simulation of Three -dimensional in Complete Centrifugal Fan

作　　者：吴子尧[1,3] 李程[1] 刘伍权[1] 王松[2] 李宝宽[3] 

机构地区：[1]军事交通学院汽车工程系,天津300161 [2]军事交通学院装备保障系,天津300161 [3]东北大学材料冶金学院,沈阳110819

出　　处：《军事交通学院学报》2012年第3期61-66,共6页Journal of Military Transportation University

摘　　要：应用Solidworks建立DFY23F—C4A型离心式通风机的整机模型，运用计算流体力学软件Fluent对其内部三维气体流动进行了模拟分析。采用非结构化网格与RNG湍流模型，考察了离心式通风机整机和其子午面、回转面、叶片表面等重要部分的静压力、动压力、速度矢量和速度梯度等参数并进行比较，得到了新的流动现象。分析这些现象发现，前盘区域的漩涡和蜗壳中的二次流现象是造成叶轮和蜗壳区域流动损失的重要因素；蜗舌附近的漩涡、边界层的分离、风机前后盘的二次涡区域是影响风机性能的主要因素。将模拟结果与实验数据进行对比得出，离心式通风机在全工况下的全压和效率均与实验数据基本吻合，所采用的模拟方法是可行的。The Solidworks software was applied to set up a whole machine model of DFY32F -CAA centrifugal fan, and a kind of CFD software fluent was applied to simulate and analyze the internal 3 - D air flow in the whole machine model. The unstructured grid and the RNG turbulence model were applied to investigate the whole machine, meridian planes, revolution surfaces, blade surfaces and other important parts, and then to compare static pressure, dynamic pressure, velocity vector and velocity gradient to obtain new fluid status. From analyzing the fluid status, the following conclusions can be ob- tained. Firstly, flow losses in impeller and volute were caused by both the vortex in the area of the front disc on fan impeller and secondary flow in the volute. Secondly, the main factors that change of fans performance were the vol4ex near the worm tongue, boundary layer separation and secondary flow area of the front and rear disc on fan impeller. Finally, compared the data got from computer simulation with experimental data, it shows that both of the total pressure and efficiency of the all conditions are in good agreement with each other and the method is feasible.

关 键 词：离心式通风机 三维数值模拟 压力场 流场 

分 类 号：TH432[机械工程—机械制造及自动化]