| 反吹式吸嘴流场数值分析及吸尘效率研究 |
| |
| 引用本文： | 郗元,成凯,娄希同,程磊,张钦国,胡艳娟.反吹式吸嘴流场数值分析及吸尘效率研究[J].西南交通大学学报,2016,29(1):105-112. |
| |
| 作者姓名： | 郗元 成凯 娄希同 程磊 张钦国 胡艳娟 |
| |
| 基金项目： | 国家自然科学基金资助项目(51405030) |
| |
| 摘 要： | 为提高扫路车的吸尘效率,采用计算流体动力学(computational fluid dynamics,CFD)技术对反吹式吸嘴流场进行计算,分析结构参数对吸尘效果的影响规律,并结合气固两相流动模型对优化后模型的吸尘效率进行计算.研究表明:吸尘口的直径不大于反吹式吸嘴宽度的 0.47 倍、倾角不大于105时,分别增大吸尘口直径和倾斜角度,均可提高吸尘效率;反吹式吸嘴近地面气流速度大且方向紧贴地面,不存在气流外泄造成的二次污染;车速由 5 km/h 提高到15 km/h 时,总除尘效率下降了27%,其中 45 m 粒径颗粒的分级除尘效率下降了 9%,152 m 粒径颗粒的分级除尘效率下降了 33%.
|
| 关 键 词： | 扫路车 反吹式吸嘴 CFD 气固两相流 吸尘效率 |
| 收稿时间： | 2014-12-11 |
Research on Numerical Analysis and Dust Collection Efficiency of Reverse Blowing Pickup Mouth |
| |
| XI Yuan,CHENG Kai,LOU Xitong,CHENG Lei,ZHANG Qinguo,HU Yanjuan.Research on Numerical Analysis and Dust Collection Efficiency of Reverse Blowing Pickup Mouth[J].Journal of Southwest Jiaotong University,2016,29(1):105-112. |
| |
| Authors: | XI Yuan CHENG Kai LOU Xitong CHENG Lei ZHANG Qinguo HU Yanjuan |
| |
| Abstract: | In order to improve dust collection efficiency, the computational fluid dynamics (CFD) technology was used to calculate the flow field of reverse blowing pickup mouth, analyze the structural parameters influence on the dust collection efficiency, and calculate the dust collection efficiency combined with the gas-solid flow model. The results show that when the ratio between outlet diameter and width is less than 0.47 and the dip angle is less than 105,the dust collection efficiency can improved by increasing the outlet diameter and dip angle.Airflow velocity is high and the direction is close to the ground when reverse blowing pickup mouth is near the ground. There is no leakage to bring about secondary pollution. The overall removal efficiency declines by 27%when traveling speed increases from 5 km/h to 15 km/h, in which the grade efficiency of 45 and 152 m particle diameter respectively decrease by 9%and 33%. |
| |
| Keywords: | |
|
| 点击此处可从《西南交通大学学报》浏览原始摘要信息 |
|
点击此处可从《西南交通大学学报》下载全文 |
|
