| 不同弯型管道内粉尘爆炸传播规律 |
| |
| 引用本文： | 李刚,胡朋,张洋洋,倪磊. 不同弯型管道内粉尘爆炸传播规律[J]. 东北大学学报(自然科学版), 2020, 41(9): 1316-1320. DOI: 10.12068/j.issn.1005-3026.2020.09.017 |
| |
| 作者姓名： | 李刚 胡朋 张洋洋 倪磊 |
| |
| 作者单位： | (东北大学 资源与土木工程学院， 辽宁 沈阳110819) |
| |
| 基金项目： | 国家自然科学基金资助项目(51774068，51874070)； 国家重点研发计划项目(2017YFC0804703)； 中央高校基本科研业务费专项资金资助项目(N180701011). |
| |
| 摘 要： | 为探究粉尘爆炸在弯型管道中的传播规律，基于1m3粉尘爆炸测试系统，搭建了S型、U型、90°弯管与长直管道4种结构，利用玉米淀粉为实验介质，测试研究了粉尘爆炸在弯管内的压力发展与火焰传播速度变化规律.结果表明:对于所建立的管道系统，当粉尘浓度相同时，超压峰值在整体管道内的传播呈下降趋势，但其在弯管处的衰减程度会有所降低，且4种管道衰减程度由高到低依次为:直管>90°弯管>S型弯管>U型弯管；火焰在管道内呈持续加速状态，但弯管处的火焰上升幅度明显小于直管，弯管对火焰的传播起阻碍作用.以上研究结论对于除尘系统的防爆设计具有参考价值.
|
| 关 键 词： | S型和U型弯管 90°弯管 粉尘爆炸 爆炸超压峰值 火焰传播速度 |
| 收稿时间： | 2020-02-05 |
| 修稿时间： | 2020-02-05 |
Propagation Law of Dust Explosion in Complex Bend Pipes |
| |
| LI Gang,HU Peng,ZHANG Yang-yang,NI Lei. Propagation Law of Dust Explosion in Complex Bend Pipes[J]. Journal of Northeastern University(Natural Science), 2020, 41(9): 1316-1320. DOI: 10.12068/j.issn.1005-3026.2020.09.017 |
| |
| Authors: | LI Gang HU Peng ZHANG Yang-yang NI Lei |
| |
| Affiliation: | School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China. |
| |
| Abstract: | In order to understand the propagation law of dust explosions in bend ducts， variety of bend pipes were set up based on 1m3 explosion test system， including pipes with a 90-degree bend， S-shaped pipes， U-shaped pipes and long straight pipes. Corn starch was used as the explosion test sample. The overpressure development and flame propagation along the bend pipes were recorded by the computer and analyzed. For the established test rig， the results show that the explosion overpressure in the pipes shows a downward trend for the same dust concentration， but its attenuation rate at the bend part decreases. The attenuation rate of those four kinds of pipes is as follows:straight pipe>90-degree bend>S-bend>U-bend. Although the flame propagation velocity is continuously accelerated in the pipes， the bend hinders the flame propagation. The rate of flame propagation velocity rise in bend pipes is smaller than that in the straight pipes. The above research conclusions have reference and application value for the explosion proof design of the dust removal system. |
| |
| Keywords: | U and S-shaped bend pipes,90-degree bend pipes dust explosion,explosion overpressure,flame propagation velocity, |
|
| 点击此处可从《东北大学学报(自然科学版)》浏览原始摘要信息 |
|
点击此处可从《东北大学学报(自然科学版)》下载全文 |
