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[1]杨凯,吕鹏飞,胡倩然,等.大尺度障碍物与泄爆面对天然气内爆炸的协同作用规律研究[J].中国安全生产科学技术,2018,14(12):21-27.[doi:10.11731/j.issn.1673-193x.2018.12.003]
　YANG Kai,LYU Pengfei,HU Qianran,et al.Research on synergetic effect of largescale obstacles and explosion vents on indoor explosion of natural gas[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(12):21-27.[doi:10.11731/j.issn.1673-193x.2018.12.003]
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大尺度障碍物与泄爆面对天然气内爆炸的协同作用规律研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年12期
页码:
21-27
栏目:
学术论著
出版日期:
2018-12-31

文章信息/Info

Title:
Research on synergetic effect of largescale obstacles and explosion vents on indoor explosion of natural gas
文章编号:
1673-193X(2018)-12-0021-07
作者:
杨凯1; 2; 吕鹏飞1; 2; 胡倩然1; 庞磊1; 2
（1.北京石油化工学院 安全工程学院，北京 102617；2.北京市安全生产工程技术研究院，北京 102617）
Author(s):
YANG Kai1; 2;  LYU Pengfei1; 2;  HU Qianran1;  PANG Lei1; 2
(1. School of Safety Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;2. Beijing Academy of Safety Engineering and Technology, Beijing 102617, China)
关键词:
气体爆炸; 泄爆面; 大尺度障碍物; 爆炸超压; 火焰速度
Keywords:
gas explosion;  explosion vent;  largescale obstacle;  explosion overpressure;  flame speed
分类号:
X932
DOI:
10.11731/j.issn.1673-193x.2018.12.003
文献标志码:
A
摘要:
为阐释民用建筑内部大尺度物品与门窗等泄爆面对天然气爆炸灾害的协同作用机制，基于典型厨房空间布局及内部物品特征，借助计算流体动力学技术研究了不同泄爆面开启压力和不同大尺度障碍物体积阻塞率条件下天然气内爆炸火焰速度、爆炸超压的分布规律。研究结果表明：大尺度障碍物与泄爆面对室内天然气爆炸过程具有显著的协同作用，共同促进火焰速度与爆炸超压的显著增长，并缩短峰值超压到达时间；大尺度障碍物的存在虽然显著降低了室内天然气的体积，但从增加房间内湍流源和相对长径比的角度进一步促进了泄爆效应；大尺度障碍物与泄爆面协同作用下，室内火焰速度呈现明显的阶段性特征，并在泄爆面附近发生波动。研究结论可为民用建筑物内气体爆炸事故调查分析和灾害评估提供科学依据。
Abstract:
In order to illustrate the synergetic effect mechanism of largescale obstacles and explosion vents like door and window on the indoor explosion of natural gas in the civil buildings, based on the spatial layout and objects characteristics in typical kitchen, the distribution laws of flame speed and explosion overpressure for the indoor explosion of natural gas under different opening pressures of explosion vents and different volume blockage ratios of largescale obstacles were studied by using the computational fluid dynamics (CFD) technology. The results showed that the largescale obstacles and explosion vents had significant synergetic effect on the indoor explosion process of natural gas, which promoted the significant increase of flame speed and explosion overpressure together, and shortened the arrival time of peak overpressure. Although the presence of largescale obstacles significantly reduced the volume of natural gas in the room, the explosion venting effect was further enhanced from the viewpoint of increasing the source of turbulence in the room and the relative aspect ratio. Under the synergetic effect of largescale obstacles and explosion vents, the indoor flame speed presented the obvious stage characteristics and fluctuated near the explosion vents. The results can provide scientific basis for the accident investigation, hazard assessment and mitigation of gas explosion in the civil buildings.

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备注/Memo

备注/Memo:
收稿日期： 2018-09-11；数字出版日期：2018-12-23
基金项目： 国家重点研发计划课题（2017YFC0804700）；北京市科技新星计划项目（Z181100006218092）；北京市优秀人才培养资助青年拔尖个人项目（2016000026833ZK05）；国家安监总局安全生产重大事故防治关键技术科技项目（Beijing-0002-2017AQ）
作者简介： 杨凯，博士，讲师，主要研究方向为爆炸安全。
通信作者： 庞磊，博士，副教授，主要研究方向为爆炸安全。
更新日期/Last Update: 2019-01-03