开口率和点火源类型对汽油蒸气泄压爆炸内场超压荷载的影响

doi:10.16085/j.issn.1000-6613.2017-0809

化工进展 ›› 2018, Vol. 37 ›› Issue (01): 23-31.DOI: 10.16085/j.issn.1000-6613.2017-0809

开口率和点火源类型对汽油蒸气泄压爆炸内场超压荷载的影响

王世茂^1,2, 杜扬^1,2, 李国庆^1,2, 齐圣^1,2, 韦世豪^1,2, 李蒙^1,2

1 中国人民解放军陆军勤务学院油料系, 重庆 401331;
2 火灾爆炸与安全防护重庆市重点实验室, 重庆 401331

收稿日期:2017-05-03 修回日期:2017-05-03 出版日期:2018-01-05 发布日期:2018-01-05
通讯作者: 杜扬,博士,博士生导师,教授,从事可燃气体火灾爆炸与安全防护技术的研究。
作者简介:王世茂(1990-),男,博士研究生,从事可燃气体火灾爆炸与安全防护技术的研究。
基金资助:
国家自然科学基金（51276195）及重庆市研究生科研创新项目（CYB17150）。

Effect of vent size and the ignition source type on the internal overpressure loading of vented gasoline-air mixture explosion

WANG Shimao^1,2, DU Yang^1,2, LI Guoqing^1,2, QI Sheng^1,2, WEI Shihao^1,2, LI Meng^1,2

1 Department of Oil, Army Logistics University of PLA, Chongqing 401331, China;
2 Chongqing Key Laboratory of Fire and Explosion Safety, Chongqing 401331, China

Received:2017-05-03 Revised:2017-05-03 Online:2018-01-05 Published:2018-01-05

摘要/Abstract

摘要： 构建了汽油蒸气泄压爆炸实验系统，研究了开口率和点火源类型对汽油蒸气泄压爆炸过程中内场超压荷载的影响规律，研究结果表明：汽油蒸气泄压爆炸会导致内场形成多个超压峰值，其中最大峰值由泄压爆炸膜破坏所形成；随开口率的增大，P₁数值近似呈线性下降，P₂的数值近似呈指数下降，外场火焰的Rayleigh-Taylor不稳定强度增加，Helmholtz振荡的持续时间延长；点火源类型对最大超压峰值和平均升压速率大小均有影响，不同点火源类型下超压峰值和平均升压速率的数值从大到小排列分布依次为高温灯丝 > 火药点火杆 > 高能电火花 > 明火点火杆；火焰结构为“火焰外锋面+内部火焰核心”，二者所占的比例受点火源类型的影响。

关键词: 汽油蒸气, 燃料, 爆炸, 超压, 安全, Helmholtz振荡, 点火源

Abstract: The gasoline vapor venting explosion experimental system was established, and a series of tests were conducted to investigate the effects of opening rate and the ignition type on the internal overpressure loadings during the process of vented explosion. The results showed that during vent explosion proeess, the multi overpressure peaks phenomenon appeared, and the maximum overpressure peak was caused by the burst of the vent cover. With the increase of the vent size, the value of P₁ decreases linearly, the value of P₂ decreases exponentially, the intensity of R-T instability and the duration of Helmholtz oscillation increases. The value of maximum overpressure peak and average rate of pressure rise size was affected by ignition source type. The value of maximum overpressure and the average rate from large to small was high temperature ignition rod, powder ignition source, ignition spark, open firing point. The flame structure included an outer flame front and an inner flame core, and the proportion of the two structures was affected by the type of ignition source.

Key words: gasoline vapor, fuel, explosion, overpressure, safety, Helmholtz oscillation, ignition source

中图分类号:

X936

王世茂, 杜扬, 李国庆, 齐圣, 韦世豪, 李蒙. 开口率和点火源类型对汽油蒸气泄压爆炸内场超压荷载的影响[J]. 化工进展, 2018, 37(01): 23-31.

WANG Shimao, DU Yang, LI Guoqing, QI Sheng, WEI Shihao, LI Meng. Effect of vent size and the ignition source type on the internal overpressure loading of vented gasoline-air mixture explosion[J]. Chemical Industry and Engineering Progress, 2018, 37(01): 23-31.

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开口率和点火源类型对汽油蒸气泄压爆炸内场超压荷载的影响

Effect of vent size and the ignition source type on the internal overpressure loading of vented gasoline-air mixture explosion

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