不同泄压条件对方管内爆炸压力特性的影响

李乾; 冯梦梦; 马力; 王玉杰; 陈先锋; 何松

doi:10.11883/bzycj-2018-0132

不同泄压条件对方管内爆炸压力特性的影响

doi: 10.11883/bzycj-2018-0132

武汉理工大学资源与环境工程学院，湖北武汉 430070

基金项目: 国家重点研发计划（2017YFC0804907）

详细信息

作者简介:
李　乾（1993－　），男，硕士研究生，256522@whut.edu.cn

通讯作者:
何　松（1987－　），男，博士，讲师，hsong@whut.edu.cn

中图分类号: O389
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- 文章访问数: 6177
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- 被引次数: 14
出版历程
- 收稿日期: 2018-04-20
- 修回日期: 2018-08-24
- 网络出版日期: 2019-04-25
- 刊出日期: 2019-07-01

Influence of different pressure relief conditionson explosion pressure in square pipeline

School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China

摘要

摘要: 为研究泄压膜约束条件对甲烷/空气预混气体爆炸压力特性的影响，在方形火焰燃烧传播测试管道中布置压力传感器，开展不同泄压膜材料、泄压膜层数及泄压口位置实验。结果表明：牛皮纸和聚丙烯薄膜约束泄爆过程中，每增加一层泄压膜，管道内最大泄爆压力平均上升11.2%和12.3%。各强度泄压膜约束条件下，管道内最大泄爆压力随着泄压口位置接近点火端，均呈现Z形规律，当泄压口设置在距尾部端面0.25 m时，各曲线达到最小值，当泄压口设置在距尾部端面0.50 m时，各曲线出现最大值。
- 方管 /
- 泄压膜强度 /
- 泄压口位置 /
- 爆炸压力特性
Abstract: In this work we carried out vented explosion experiments with different pressure relief membrane material and layers and different venting locations in the square flame propagation test pipeline and investigated the influence of pressure relief membrane constraints on explosion pressure’s characteristics of premixed methane/air gas using the pressure sensor to measure the peak overpressure under various experimental conditions in the pipeline and comparing their venting effects. The results showed that there is a linear relationship between the maximum explosion pressure and the number of relief membrane layers made of the same material. The maximum explosion pressure in the pipeline increased by 11.2% and 12.3% respectively for each additional pressure relief membrane layer of kraft paper and polypropylene film. As the venting location approached the ignition end, the maximum explosion pressure in the pipeline showed a " Z” pattern with different pressure relief membrane strengths. When the venting location was set at 0.25 m from the trailing end, the minimum value was observed for each curve. When the venting location was set at 0.50 m from the trailing end, each curve reached its maximum value.
- square pipeline /
- pressure relief membrane strength /
- venting location /
- explosion pressure characteristics

HTML全文

图 1 实验系统

Figure 1. Experimental system

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图 2 等容爆炸压力特性曲线

Figure 2. Pressure and its rise rate at constant volume

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图 3 火焰发展系列图像

Figure 3. Images of flame propagation

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图 4 不同泄压膜强度条件下的爆炸压力分布

Figure 4. Explosion pressure at different pressure relief membrane strengths

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图 5 爆炸压力上升速率分布

Figure 5. Rate of explosion pressure rise

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图 6 不同泄压口位置条件下最大泄爆压力分布

Figure 6. Peak overpressures at different venting locations

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图 7 不同泄压口位置条件下破膜时间分布

Figure 7. Rupture time at different venting locations

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