双重异性障碍物下掺氢甲烷的燃爆压升效应

徐阳; 李冕; 李元兵; 龙凤英

doi:10.11858/gywlxb.20240944

双重异性障碍物下掺氢甲烷的燃爆压升效应

doi: 10.11858/gywlxb.20240944

徐阳^{1, 2,},
李冕³,
李元兵^{1, 2},
龙凤英⁴

1.
重庆安全技术职业学院安全监督管理学院, 重庆　404121
2.
重庆安全技术职业学院安全职业教育研究所, 重庆　404121
3.
重庆安全技术职业学院建筑与环境安全学院, 重庆　404121
4.
南京理工大学机械工程学院, 江苏南京　210094

基金项目: 中国高校产学研创新基金-新一代信息技术创新项目（2021ITA08007）；重庆市职业教育教学改革研究项目（Z2241166）

详细信息

作者简介:
徐　阳（1988－），男，硕士，副教授，主要从事风险评估、矿山安全等灾害防治技术研究. E-mail：1027877851@qq.com

中图分类号: O382.1; O521.9
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- 文章访问数: 23
- HTML全文浏览量: 12
- PDF下载量: 1
出版历程
- 收稿日期: 2024-11-21
- 修回日期: 2025-01-09
- 网络出版日期: 2025-04-09

Pressure Rise Effect of Hydrogen-Methane Mixture Combustion under Dual Heterogeneous Obstacles

XU Yang^{1, 2
,},
LI Mian³,
LI Yuanbing^{1, 2},
LONG Fengying⁴

1.
Safety Supervision and Management School, Chongqing Vocational Institute of Safety & Technology, Chongqing 404121, China
2.
Safety Vocational Education Research Institute, Chongqing Vocational Institute of Safety & Technology, Chongqing 404121, China
3.
School of Architecture and Environmental Safety, Chongqing Vocational Institute of Safety & Technology, Chongqing 404121, China
4.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

摘要

摘要: 气体燃爆灾害特性是国内外研究的热点和重点，研究复杂约束条件下的燃爆特性极具意义。针对刚性障碍物和柔性障碍物，通过实验探究了长直形管道中双重异性障碍物下掺氢甲烷气体的燃爆过程。结果表明：较无障碍物环境，双重障碍物对火焰速度、爆炸压力以及爆炸强度指数的影响表现为随柔性障碍物阻塞率的提高和掺氢的置入而提升，并且爆炸压力和爆炸强度指数的增幅高于火焰速度的增幅。在掺氢和双重障碍物的共同作用下，火焰接触速度增幅可达176.51%，最大速度增幅达316.40%。双重障碍物导致上游区域出现压力先升后降现象，下游区域的压力振荡明显；掺氢后，与无障碍环境相比，管内最大爆炸压力增幅可达1280.9%，最大爆炸强度指数提升至167.65倍。在约束设施布局工程项目中，应首选较小阻塞率的柔性障碍物，以有效减轻爆炸危害。
- 气体燃爆 /
- 双重障碍物 /
- 火焰速度 /
- 爆炸压力 /
- 爆炸强度指数
Abstract: The disaster characteristics of gas combustion and explosion are hot and key topics in domestic and international research. Studying the combustion and explosion characteristics under complex constraint conditions is of great significance. Regarding rigid and flexible obstacles, the combustion and explosion process of hydrogen-doped methane gas in a long straight pipeline with double heterogeneous obstacles was explored through experiments. The results show that, compared with the obstacle-free environment, the influence of double obstacles on the flame speed, explosion pressure, and explosion intensity index increases with the increase in the blockage ratio of the flexible obstacle and the addition of hydrogen. Moreover, the increase in explosion pressure and explosion intensity index is greater than that of the flame speed. Under the combined action of hydrogen addition and double obstacles, the flame contact speed can increase by up to 176.51%, and the maximum speed can increase by up to 316.40%. The double obstacles cause the pressure in the upstream region to rise first and then fall, and the pressure oscillation in the downstream region is obvious. After hydrogen addition, compared with the obstacle-free environment, the maximum explosion pressure in the pipeline can increase by up to 1280.9%, and the maximum explosion intensity index can increase to 167.65 times. In the layout engineering projects of constraint facilities, flexible obstacles with a smaller blockage ratio should be preferred to effectively mitigate the consequences of explosion hazards.
- gas explosion /
- dual obstacles /
- flame speed /
- explosion pressure /
- explosion intensity index

HTML全文

图 1 实验平台示意图

Figure 1. Schematic diagram of experimental platform

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图 2 实验工况示意图

Figure 2. Schematic diagrams of experimental conditions

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图 3 无障碍物条件（工况1）下甲烷燃爆火焰结构变化

Figure 3. Structural changes of methane explosion flame under obstacle-free condition (Case 1)

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图 4 刚柔障碍物工况下甲烷燃爆火焰结构变化

Figure 4. Structural changes of methane explosion flame under rigid-flexible obstacle conditions

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图 5 刚柔障碍物工况下掺氢甲烷燃爆火焰结构变化

Figure 5. Structural changes of hydrogen-methane mixture explosion flame under rigid-flexible obstacle conditions

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图 6 各工况下火焰锋面传播速度和火焰前锋位置随时间的变化

Figure 6. Changes in flame front propagation speed and flame front position with time under all conditions

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图 7 不同工况下接触速度（v_c）与最大速度（v_max）的关系

Figure 7. Relationship between contact speed (v_c) and maximum speed (v_max) under different conditions

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图 8 不同工况下爆炸压力随时间的变化

Figure 8. Deflagration pressure versus time under different experimental conditions

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图 9 上游和下游区域的最大爆炸压力、压升率及爆炸强度指数的对比

Figure 9. Comparison of the maximum explosion pressure, pressure rise rate, and explosion intensity index

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图 10 管内压升效应的演化机制

Figure 10. Evolution mechanism of pressure rise effect inside the pipe

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