| 空间阻塞对室内燃气泄漏爆炸影响研究 |
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| 引用本文： | 韩永华,季学伟,陈涛,贺丁,吴爱枝,周轶,马克祥.空间阻塞对室内燃气泄漏爆炸影响研究[J].中国安全生产科学技术,2019,15(11):36-42. |
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| 作者姓名： | 韩永华 季学伟 陈涛 贺丁 吴爱枝 周轶 马克祥 |
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| 作者单位： | (1.中国电子科学研究院，北京 100041； 2.北京市安全生产科学技术研究院，北京101100；3.清华大学 工程物理系 公共安全研究院，北京 100084； 4.中国寰球工程有限公司，北京100012) |
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| 基金项目： | * 基金项目: 国家重点研发计划项目(2018YFC0809900)；北京市科委科技计划课题(Z181100009018003,Z181100009018010 ) |
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| 摘 要： | 以餐饮企业的熟食操作间为例建立物理模型，通过CFD方法模拟不同空间阻塞度下天然气泄漏爆炸情形。研究结果表明:阻塞率在99.95%~100%时，燃气浓度呈现反抛物线式上升。空间阻塞率在99.982%时（开敞面积1 m2），泄漏1 200 s，熟食操作间燃气浓度值可达6%；空间阻塞率在99.955%（开敞面积2.5 m2）~100%时，燃气爆炸后熟食操作间内产生的超压最大值均大于30 kPa；当空间阻塞率在99.991%（开敞面积0.5 m2）~100%时，设定工况下爆炸超压随空间阻塞率呈指数式增加。研究认为，空间阻塞率在99.95%以上，燃气泄漏极易形成可燃蒸汽云，发生爆炸产生冲击波超压能够毁坏建筑物，在生产和生活中，对于有燃气使用的空间，应尽可能降低空间阻塞率，以避免可能的燃气泄漏形成危险域和爆炸形成过高冲击波超压。
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| 关 键 词： | 空间阻塞 CFD模拟 天然气 泄漏 爆炸 |
Study on influence of space blocking on indoor gas leakage and explosion |
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| HAN Yonghua,JI Xuewei,CHEN Tao,HE Ding,WU Aizhi,ZHOU Yi,MA Kexiang.Study on influence of space blocking on indoor gas leakage and explosion[J].Journal of Safety Science and Technology,2019,15(11):36-42. |
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| Authors: | HAN Yonghua JI Xuewei CHEN Tao HE Ding WU Aizhi ZHOU Yi MA Kexiang |
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| Affiliation: | （1.China Academy of Electronics and Information Technology，Beijing 100041，China;2.Beijing Academy of Safety Science and Technology， Beijing 101100，China；3.Institute for Public Safety Research,Department of Engineering Physics,Tsinghua University,Beijing 100084,China;4.China Huanqiu Contracting & Engineering Co.,LTD.,Beijing 100012,China） |
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| Abstract: | A physical model was established by taking the cooked food operation room of catering enterprises as an example,and the CFD method was used to simulate the natural gas leakage and explosion under different space blocking degrees.The results showed that when the blocking rate was in the range of 99.95%-100%,the gas concentration presented an anti parabolic rise.When the space blocking rate was 99.982% (with opening area of 1 m2),after the leakage time of 1200 s,the gas concentration value in the cooked food operation room could reach 6%.When the space blocking rate was in the range from 99.955% (with opening area of 2.5 m2) to 100%,the maximum values of overpressure generated in the cooked food operation room after the gas explosion were all greater than 30 kPa.When the space blocking rate was in the range from 99.991% (with opening area of 0.5 m2) to 100%,the explosion overpressure increased exponentially with the space blocking rate under the set working conditions.The research suggested that when the space blocking rate was above 99.95%,the gas leakage was very easy to form a flammable vapor cloud,and when the explosion occurred,the shock wave overpressure could destroy the building.In the production and living,for the spaces with gas usage,the space blocking rate should be reduced as much as possible to avoid the possible gas leakage forming the dangerous areas and the explosion forming excessive shock wave overpressure. |
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| Keywords: | space blocking CFD simulation natural gas leakage explosion |
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