基于流场模拟的真空清扫车吸尘口的参数设计
来源期刊：中南大学学报(自然科学版)2012年第9期
论文作者：杨春朝 章易程 欧阳智江 张晶 杨松枝 张睿之
文章页码：3704 - 3709
关键词：吸尘口；计算流体力学；参数化建模；气固两相流
Key words：dust collection port; CFD; parametric modeling; gas-solid two-phase flow
摘 要：基于对吸尘口结构参数的分析，采用计算流体力学软件Fluent对吸尘口流场进行计算，分析探讨各结构参数对吸尘效果的影响规律，提出改进的吸尘口设计方案，并对气固两相流进行模拟分析。研究结果表明：吸尘盒宽度的增加对前进气面的速度影响不大，但降低了排气管入口处的真空度而不利于吸尘；排气管径在小于吸尘盒长度的1/3范围内增大时有利于吸尘效果增强；排气管与后板的倾斜角在小于110˚时，增大倾斜角有利于提高吸尘能力；改进型吸尘口近地面气流速度大，方向紧贴地面，内部无涡流，排气管入口真空度大，固体颗粒能明显进入排气管，吸尘能力强。
Abstract: Based on the analysis of structural parameters, the flow field of vacuum dust collection port was calculated with computational fluid dynamics(CFD) software Fluent. An improved design scheme was put forward after exploring influences of structural parameters on sucking effect. And gas-solid two-phase flow was simulated and analyzed. The results show that with the increase of the width of dust collection port, the air velocity of front surface is less influenced, but the vacuum of exhaust pipe is reduced, which is against sucking dust. When the exhaust pipe diameter is less than 1/3 of the length of dust collection port, it is beneficial for a progressive increase in vacuum with the increase of the exhaust pipe diameter. When the oblique angle of exhaust pipe and backboard does is less than 110°, the vacuum effect improves with the increase of their oblique angle. There is a higher air velocity parallel to the ground without turbulence within the improved dust collection port. Also there is higher vacuum in the inlet of exhaust pipe. The solid particles can be absorbed obviously into the exhaust pipe by means of solid trace simulation. Therefore, the improved dust collection port manifests a strong ability of absorbing dust.
杨春朝1，章易程1，欧阳智江1, 2，张晶1，杨松枝1，张睿之1
(1. 中南大学 交通运输工程学院，湖南 长沙，410075；
2. 北京航空航天大学 宇航学院，北京，100191)
摘 要：基于对吸尘口结构参数的分析，采用计算流体力学软件Fluent对吸尘口流场进行计算，分析探讨各结构参数对吸尘效果的影响规律，提出改进的吸尘口设计方案，并对气固两相流进行模拟分析。研究结果表明：吸尘盒宽度的增加对前进气面的速度影响不大，但降低了排气管入口处的真空度而不利于吸尘；排气管径在小于吸尘盒长度的1/3范围内增大时有利于吸尘效果增强；排气管与后板的倾斜角在小于110˚时，增大倾斜角有利于提高吸尘能力；改进型吸尘口近地面气流速度大，方向紧贴地面，内部无涡流，排气管入口真空度大，固体颗粒能明显进入排气管，吸尘能力强。
关键词：吸尘口；计算流体力学；参数化建模；气固两相流
YANG Chun-zhao1, ZHANG Yi-cheng1, OUYANG Zhi-jiang1, 2, ZHANG Jing1, YANG Song-zhi1, ZHANG Rui-zhi1
(1. School of Transportation Engineering, Central South University, Changsha 410075, China;
2. School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China)
Abstract:Based on the analysis of structural parameters, the flow field of vacuum dust collection port was calculated with computational fluid dynamics(CFD) software Fluent. An improved design scheme was put forward after exploring influences of structural parameters on sucking effect. And gas-solid two-phase flow was simulated and analyzed. The results show that with the increase of the width of dust collection port, the air velocity of front surface is less influenced, but the vacuum of exhaust pipe is reduced, which is against sucking dust. When the exhaust pipe diameter is less than 1/3 of the length of dust collection port, it is beneficial for a progressive increase in vacuum with the increase of the exhaust pipe diameter. When the oblique angle of exhaust pipe and backboard does is less than 110°, the vacuum effect improves with the increase of their oblique angle. There is a higher air velocity parallel to the ground without turbulence within the improved dust collection port. Also there is higher vacuum in the inlet of exhaust pipe. The solid particles can be absorbed obviously into the exhaust pipe by means of solid trace simulation. Therefore, the improved dust collection port manifests a strong ability of absorbing dust.
Key words:dust collection port; CFD; parametric modeling; gas-solid two-phase flow
