| 单面遮挡下受限甲烷气云爆炸超压模型研究 |
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| 引用本文： | 吕东,张欣,吴伟,李晋. 单面遮挡下受限甲烷气云爆炸超压模型研究[J]. 振动与冲击, 2014, 33(5): 42-45 |
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| 作者姓名： | 吕东 张欣 吴伟 李晋 |
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| 作者单位： | 公安部天津消防研究所, 天津 300381 |
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| 基金项目： | 国家科技支撑计划项目(2011BAK03B08);公安部消防局应用创新计划项目(2012XFCX15) |
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| 摘 要： | 气体爆炸超压的经验公式往往不涉及遮挡对其带来的影响。以基于计算流体力学的方法，研究了单面遮挡对不同量级的受限甲烷气体爆炸超压带来的影响。研究结果表明，在设计的遮挡条件下，气体爆炸的超压与折合距离在对数坐标系中近似呈线性关系。通过数值模拟，提出了受限甲烷气体在受单面遮挡时的爆炸超压、甲烷燃烧热及距离爆炸的气云中心之间的距离三者之间的模拟计算式。该方面的研究对甲烷气体爆炸方面的工程计算以及其它遮挡条件下的爆炸模拟方法均有一定的参考意义。
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| 关 键 词： | 甲烷 爆炸 超压 折合距离 |
| 收稿时间： | 2013-01-28 |
| 修稿时间： | 2013-04-12 |
Research on explosion overpressure model of confined methane cloud obstructed with single wall |
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| LV Dong,ZHANG Xin,WU Wei,LI Jin. Research on explosion overpressure model of confined methane cloud obstructed with single wall[J]. Journal of Vibration and Shock, 2014, 33(5): 42-45 |
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| Authors: | LV Dong ZHANG Xin WU Wei LI Jin |
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| Affiliation: | Tianjin Fire Research Institute of MPS, Tianjin 300381 |
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| Abstract: | The existing empirical formulae on gas explosion overpressure often ignore the influence of obstructions and barriers. Overpressures of series methane gas explosions occurred in a confined space were researched in logarithmic coordinates based on CFD method. The results indicated that the relation between the overpressure and the scaled distance is linear in logarithmic coordinates. Formulae on overpressure, combustion heat of the methane gas and distance from the centre of the combustible gas cloud were raised. This research can be used in calculations of explosion engineering, scientific research and others on methane gas explosion. |
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| Keywords: | methaneexplosionoverpressurescaled distance |
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