主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2024, Vol. 43 ›› Issue (1): 23-28.

• • 上一篇    下一篇

滑移装置协同气液两相流抑制受限空间甲烷爆炸试验研究

焦一飞1, 祝和春1, 曾文慧1, 段玉龙2   

  1. （1. 国网四川省电力公司经济技术研究院，四川 成都 610041；2. 重庆科技学院 安全工程学院，重庆 401331）
  • 出版日期:2024-01-15 发布日期:2024-01-15
  • 作者简介:焦一飞(1985- )，男，国网四川省电力公司经济技术研究院高级工程师，硕士，主要从事输变电工程变电土建、消防专项评审及相关研究工作，四川省成都市高新区蜀绣西路366号，610041。
  • 基金资助:
    基金项目：重庆市教育委员会科学技术研究项目（KJQN202101503）；油气生产安全与风险控制重庆市重点实验室开放基金（cqsrc202111）

Experimental study on the synergistic effect of sliding devices on gas-liquid two-phase flow suppression of methane explosion in confined spaces

Jiao Yifei1, Zhu Hechun1, Zeng Wenhui1, Duan Yulong2   

  1. (1. State Grid Sichuan Economic Research Institute, Sichuan Chengdu 610041, China;2. School of Safety Engineering, Chongqing University of Science and Technology, Chongqing 401311, China)
  • Online:2024-01-15 Published:2024-01-15

摘要： 为探究不同气体驱动水雾喷洒对滑移装置下甲烷爆炸特性的影响规律，在方形管10 cm ×10 cm ×100 cm中开展爆炸试验，借助高速摄像技术和压力采集技术，通过改变滑移装置弹簧线径、水雾驱动气体类别，剖析不同工况对爆炸火焰结构演变行为和压力瞬态变化规律的影响。结果表明：N2驱动细水雾与滑移装置对甲烷的协同抑爆灭火效果优于空气驱动水雾协同滑移装置作用，且预防细水雾抑爆失效情形下，N2可起到冗余灭火作用和协同增效作用。对比空气驱动细水雾作用，N2驱动细水雾可有效缩短火焰燃烧时间，延缓火焰锋面速度峰值出现，抑制火焰锋面形态演变，缩小压力振荡区间，衰减近一半超压峰值，将最大超压峰值有效控制在燃烧区内，减少未燃区二次爆炸的可能性。

关键词: 甲烷爆炸, 气体驱动, 细水雾, 滑移装置

Abstract: To investigate the influence of different gas?driven water mist sprays on the methane explosion characteristics under sliding devices, 10 cm × 10 cm× 100 cm explosion tests were conducted in a square tube, using high?speed camera technology and pressure acquisition technology. By changing the spring diameter of the sliding device and the type of water mist driving gas, the effects of different working conditions on the evolution behavior of the explosion flame structure and the transient change law of pressure were analyzed. The results show that the synergistic suppression and extinguishing effect of N2 driven water mist and sliding device on methane is better than that of air driven water mist synergistic sliding device, and N2 can play a redundant extinguishing and synergistic effect in preventing the failure of water mist suppression. Compared to the effect of air?driven water mist, N2-driven water mist can effectively shorten the flame combustion time, delay the peak velocity of the flame front, suppress the evolution of the flame front morphology, narrow the pressure oscillation range, attenuate nearly half of the overpressure peak, effectively control the maximum overpressure peak within the combustion zone, and reduce the possibility of secondary explosion hazards in the unburned zone.

Key words: methane explosion, gas drove, fine water mist, sliding device