| 泄爆夹层内障碍物对泄爆效果影响的数值模拟研究* |
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| 引用本文： | 钟委,蒋雨阳,韩宁,宋逸凡,高子鹤.泄爆夹层内障碍物对泄爆效果影响的数值模拟研究*[J].中国安全生产科学技术,2022,18(12):162-168. |
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| 作者姓名： | 钟委 蒋雨阳 韩宁 宋逸凡 高子鹤 |
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| 作者单位： | （1.郑州大学 力学与安全工程学院，河南 郑州 450001；2.郑州大学 土木工程学院，河南 郑州 450001) |
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| 基金项目： | * 基金项目: 国家自然科学基金项目（52076198）；河南省科技攻关重点项目（182102310007）；河南省优秀青年科学基金项目（222300420078） |
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| 摘 要： | 为研究泄爆夹层内障碍物位置对燃气泄爆效果的影响，以某大型商业综合体暗厨房为研究对象，考虑泄爆夹层中结构梁不同位置的泄爆效果，对暗厨房燃气爆炸的泄爆过程开展数值模拟研究。研究结果表明:在火焰没有到达泄爆窗前的爆炸初始阶段，障碍物对火焰结构和传播速度基本没有影响，当火焰进入泄爆夹层后，障碍物的存在可引发火焰加速现象；当障碍物距离泄爆窗1.7 m时，火焰加速现象较为明显，火焰最大传播速度可达591.5 m/s，此时厨房内压力峰值约2.9 MPa，约为没有结构梁情况下1.42倍；障碍物距离泄爆窗较近时，二者将协同影响火焰传播；厨房内压力峰值随着障碍物与泄爆窗距离的增大遵循增大-突降-增大的规律。研究结果可为商业综合体暗厨房泄爆设计提供一定理论依据。
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| 关 键 词： | CFD模拟 暗厨房 天然气 爆炸 障碍物位置 |
Numerical simulation on influence of obstacle in explosion-venting interlayer on explosion-venting effect |
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| ZHONG Wei,JIANG Yuyang,HAN Ning,SONG Yifan,GAO Zihe.Numerical simulation on influence of obstacle in explosion-venting interlayer on explosion-venting effect[J].Journal of Safety Science and Technology,2022,18(12):162-168. |
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| Authors: | ZHONG Wei JIANG Yuyang HAN Ning SONG Yifan GAO Zihe |
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| Affiliation: | (1.School of Mechanics and Safety Engineering,Zhengzhou University,Zhengzhou Henan 450001,China;2.School of Civil Engineering,Zhengzhou University,Zhengzhou Henan 450001,China) |
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| Abstract: | In order to study the influence of the obstacle position in the explosion-venting interlayer on the gas explosion-venting effect,taking an inner kitchen of a large commercial complex as the research subject,the numerical simulation research on the explosion-venting process of gas explosion in inner kitchen was conducted considering the explosion-venting effect under different positions of the structural beam in the explosion-venting interlayer.The results showed that in the initial stage of explosion,the obstacle had little effect on the flame structure and propagation speed,and when the flame entered the explosion-venting interlayer,the presence of obstacle caused the flame acceleration.The flame acceleration phenomenon was the most obvious when the obstacle was 1.7 m away from the explosion-venting window,and the maximum value of flame propagation speed was 591.5 m/s.Meanwhile,the peak pressure in the kitchen was about 2.9 MPa,which was 1.42 times than that in the circumstance without structural beam.The closer the obstacle was to the explosion-venting window,the synergistic effect of the two influenced the flame propagation.The peak pressure in the kitchen followed the rule of increasing-decreasing suddenly-increasing with the increase of the distance between the obstacle and the explosion-venting window.The research results can provide a certain theoretical basis for the explosion-venting design of the inner kitchen in commercial complexes. |
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| Keywords: | CFD simulation inner kitchen natural gas explosion obstacle position |
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