扫路机专用风机内部气固两相流场仿真分析  

Numerical study of gas-solid two-phase flow field of road sweeper fan

作　　者：张斌 滕新科 李亮 万军 

机构地区：[1]长沙中联重科环境产业有限公司,湖南长沙410013

出　　处：《机电工程》2018年第3期246-250,共5页Journal of Mechanical & Electrical Engineering

基　　金：湖南省科技计划项目经费资助项目(2016RS3011)

摘　　要：针对扫路机专用风机的磨损问题,采用RNG k-ε湍流模型结合欧拉-拉格朗日方法的颗粒轨道模型,对某型号扫路机专用风机内部气固两相流场进行了数值仿真研究。首先分析了扫路机专用风机叶片吸力面上的分离流动情况及颗粒在叶轮内的流动规律;然后结合颗粒运动轨迹,探究风机叶片的主要磨损位置、磨损形状及蜗壳的磨损情况,获得了专用风机内部气固两相流磨损机理及磨损规律。结果表明:在分离流动的作用下,固体颗粒偏向叶片压力面运动,导致叶片压力面磨损;压力面的磨损呈条带状分布,叶片磨损最严重区域位于叶片与后盘接触区的1/4处;蜗壳表面存在周期性磨损区。Aiming at the abrasion of road sweeper fan,RNG k-ε turbulence model combined with particle trajectory model of Euler Lagrange method was used to study inner flow field offan. Firstly,the separation flow and the flow pattern of the particles in the impeller were analyzed.Thencombining with the trajectory of particle motion,the main wear position and wear shape of the fan blade and the wear of the volutewere investigated,and the abrasion mechanism and wear rule of gas-solid two-phase flow field offan was obtained. The results indicate that under the action of the separation flow,the solid particles keep moving towards the pressure surface and colliding with the pressure surface,resulting in the wear of blade pressure surface. The wear of fan blade is mainly located on the pressure surface,and the wear of the pressure surface is a strip distribution. The most serious area of blade wear is located at 1/4 of the contact area between blade and hub. There is a periodic wear zone on the surface of the volute.

关 键 词：扫路机 离心风机 气固两相流 磨损率 

分 类 号：TH442[机械工程—机械制造及自动化] U418.324[交通运输工程—道路与铁道工程]