水平管道弱激波扬起沉积粉尘运动特征研究

doi:10.16265/j.cnki.issn1003-3033.2019.01.010

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (1): 55-61.doi: 10.16265/j.cnki.issn1003-3033.2019.01.010

水平管道弱激波扬起沉积粉尘运动特征研究

张小良教授, 叶圣军, 刘晓晨, 李浩, 杨璐颖

上海应用技术大学城市建设与安全工学院,上海 201418

收稿日期:2018-10-10 修回日期:2018-12-15 出版日期:2019-01-28 发布日期:2020-11-23
作者简介:张小良 (1978—),男,湖南邵阳人,博士,教授,主要从事通风、除尘及爆炸防护、应急管理等方面的研究。E-mail: yyyzxl@126.com。
基金资助:
国家自然科学青年基金资助(51304137)。

Study on movement characteristics of dust raised by weak shock wave in horizontal pipeline

ZHANG Xiaoliang, YE Shengjun, LIU Xiaochen, LI Hao, YANG Luying

College of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, China

Received:2018-10-10 Revised:2018-12-15 Online:2019-01-28 Published:2020-11-23

摘要/Abstract

摘要： 鉴于机械加工行业中,水平除尘管道内沉积粉尘二次扬起形成的爆炸常会给人们的生命财产造成巨大的损失,以常见的铝合金粉尘作为研究对象,通过自主设计的水平管道试验平台、粒子图像测速(PIV)系统等设备试验研究水平除尘管道内沉积粉尘卷扬运动特征。结果表明:在有膜且弱激波作用下,扬尘最大速度随着沉积量的增大呈先增大再减小而后再增大现象;在无膜且弱激波作用下,扬尘最大速度随着沉积量的增大呈先减小后增大现象;无膜片时卷扬粉尘的最大速度均大于同等初始压力作用下有膜片时的最大速度;在弱激波的作用下,膜片能降低二次扬尘的最大速度并改变粉尘云流场状态。

关键词: 粉尘, 除尘管道, 弱激波, 膜片, 粒子图像测速(PIV)系统

Abstract: In view of that in the mechanical processing industry, the deposited dust in the horizontal pipeline often cause huge losses to people's lives and property through explosion resulting from the dust raised secondarily, movement characteristics of dust raised in horizontal pipeline were studied experimentally by using common aluminum alloy dust as the research object, a self-designed horizontal pipeline as the test platform, and a PIV system and other equipment as the means of data acquisition. The results show that under the action of thin membrane and weak shock wave, the maximum velocity of dust increases first, then decreases and then increases with the increase of deposition, that under the action of no membrane and weak shock wave, the maximum velocity of dust decreases first and then increases with the increase of deposition, that membrane makes the maximum velocity of raised dust decrease, and that under the action of weak shock wave, the membrane can reduce the maximum velocity of secondary dust and change the flow field of dust cloud.

Key words: dust, dust removal pipe, weak shock wave, diaphragm, particle image velocimetry(PIV) testing system

中图分类号:

X932

张小良, 叶圣军, 刘晓晨, 李浩, 杨璐颖. 水平管道弱激波扬起沉积粉尘运动特征研究[J]. 中国安全科学学报, 2019, 29(1): 55-61.

ZHANG Xiaoliang, YE Shengjun, LIU Xiaochen, LI Hao, YANG Luying. Study on movement characteristics of dust raised by weak shock wave in horizontal pipeline[J]. China Safety Science Journal, 2019, 29(1): 55-61.

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水平管道弱激波扬起沉积粉尘运动特征研究

Study on movement characteristics of dust raised by weak shock wave in horizontal pipeline

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