基于Fluent的小型扫路机内部流场数值分析及优化  

Numerical Analysis and Optimization of the Internal Flow Field in a Small Sweeper Based on Fluent

作　　者：鲁耀中 陈阵 李伟 Lu Yaozhong;Chen Zhen;Li Wei(Changsha Zoomlion Environmental Industry Co.,Ltd.,Changsha 410013,China)

机构地区：[1]长沙中联重科环境产业有限公司,长沙410013

出　　处：《机电工程技术》2024年第6期148-150,193,共4页Mechanical & Electrical Engineering Technology

基　　金：湖南省教育厅科学研究项目(20C0361)。

摘　　要：针对某小型扫路机箱体内网孔板易堵塞的问题,基于Fluent采用了应用计算流体力学(CFD)方法对该扫路机箱体内流场进行了仿真,采用Realizable k-ε湍流模型和多重坐标系(MRF)进行求解,对风机进气网孔板的网孔数量、风机进气室高度对系统性能的影响进行了分析。仿真结果表明,该型扫路机箱体内网孔板易堵塞的原因为风机进气室空间高度过小,导致网孔处流速过高,垃圾易吸附于网孔板上,从而影响风机进气的通畅性,进而降低了整个系统的性能,单纯靠增加风机进气网孔板的网孔数量并不能大幅提升扫路机的气力系统作业性能。通过计算优化了风机进气室空间距离等关键参数后,风机功率提升6.94%,风机流量提升6.27%,吸嘴负压提升10.15%,整个气力系统的性能得到了显著提升。To address the challenge of mesh plates clogging within the small sweeper casing,the computational fluid dynamics(CFD)method based on fluent is employed to simulate the flow field inside the sweeper casing.The Realizable k-εturbulence model and the multiple reference frames(MRF)approach are utilized for the simulation.The impact of the number of mesh holes on the fan intake mesh plate and the height of the fan intake chamber on system performance are analyzed.The simulation results show that the reason why the mesh plate inside the sweeping machine case is prone to blockage is due to the small height of the air intake chamber of the fan,which leads to high flow velocity at the mesh hole and easy adsorption of garbage on the mesh plate,thereby affecting the smoothness of the fan air intake and reducing the performance of the entire system,and simply increasing the number of mesh holes on the intake mesh plate of the fan cannot significantly improve the operational performance of the pneumatic system of the sweeper.By optimizing critical parameters such as the distance of the fan intake chamber,the calculations demonstrate that the fan power can be increased by 6.94%,the fan flow rate can be elevated by 6.27%,and the suction pressure at the nozzle can be boosted by 10.15%.Consequently,the performance of the entire pneumatic system is significantly enhanced.

关 键 词：扫路机 计算流体力学(CFD) 流场性能 风机 优化 

分 类 号：TH123[机械工程—机械设计及理论]