Numerical study of gas solid two phase flow field of road sweeper fan
                                                   ZHANG Bin, TENG Xin ke, LI Liang, WAN Jun
                     （Changsha Zoomlion Environmental Industry Co., Ltd., Changsha 410013, China）


Abstract: 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.
Key words: road sweeper; centrifugal fan; gas solid two phase flow; wear rate