基于响应面法的清扫车沉降室流场特性优化  

Optimization of Flow Field Characteristics of the Sweeper Settling Chamber Based on Response Surface Method

作　　者：曹国智 CAO Guozhi(China Railway Siyuan Survey and Design Institute Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《真空科学与技术学报》2023年第11期967-976,共10页Chinese Journal of Vacuum Science and Technology

基　　金：江苏省社会发展-重点项目-重大科技示范(BE2021621)。

摘　　要：针对目前道路清扫车因重力沉降室结构设计不合理而导致除尘效率低下,风机排放口颗粒物浓度超标的问题,对某型道路清扫车的重力沉降室进行流场分析与结构优化设计。利用FLUENT对沉降室内部流场特性及尘粒在其内部的运动情况进行模拟,研究了沉降室的关键结构参数(挡尘罩夹角,挡尘板宽度和进风管出口距沉降室顶部距离)对沉降性能(沉降室底部速度、出风口前部速度和沿程压力降)的单因素影响规律。基于Box-Behnken设计和回归分析对重力沉降室进行了多目标响应面优化,得到了重力沉降室的最优结构参数。最后基于DPM颗粒相模型,验证了优化后的重力沉降室对当量粒径0.5 mm以上的尘粒有较优的沉降效果。In order to solve the problems of low dust removal efficiency and excessive particle concentration at the fan discharge port due to the irrational design of the gravity settling chamber,the flow field analysis and structural optimization design of the gravity settling chamber of a certain type of road sweeper was carried out.Firstly,FLUENT was used to simulate the internal flow field characteristics of the settling chamber and the movement of dust particles inside the chamber,and the single-factor effects of the key structural parameters of the settling chamber(angle of the dust shield,width of the dust baffle plate,and the distance of the inlet duct outlet from the top of the chamber)on the settling performance(velocity at the bottom of the chamber,velocity at the front of the outlet,and the along-travel pressure drop)were investigated.Based on Box-Behnken design and regression analysis,a multi-objective response surface optimization of the gravity settling chamber was carried out,and the optimal structural parameters of the gravity settling chamber were obtained.Finally,based on the DPM particle phase model,it was verified that the optimized gravity settling chamber had a better settling effect for dust particles with an equivalent particle size above 0.5 mm.

关 键 词：道路清扫车 重力沉降室 流场特性 响应面法 

分 类 号：U273.99[机械工程—车辆工程]