| 宫广东,刘庆明*,白春华,陈默.10m3爆炸罐中甲烷燃烧爆炸发展过程[J].实验力学,2011,26(1):91~95 |
| 10m3爆炸罐中甲烷燃烧爆炸发展过程 |
| On the Development of Methane Combustion and Explosion in a 10m3 Explosion Vessel |
| 投稿时间：2010-06-02 修订日期：2010-10-21 |
| DOI： |
| 中文关键词: 甲烷爆炸 超压 数值模拟 10m3爆炸罐 |
| 英文关键词:methane explosion overpressure numerical simulation 10m3 explosion vessel |
| 基金项目:国家自然科学基金(10772032)资助; 爆炸科学与技术国家重点实验室基金资助项目(ZDKT08-2-6,YBKT09-1) |
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| 中文摘要: |
| 在大型多相混合物爆炸实验系统(10m3爆炸罐)中对甲烷/空气混合物在40J电火花点火条件下爆炸发展过程进行了实验和数值模拟研究。采用中心电火花点火,并在距点火点不同距离处设置4个压力传感器。得到下列实验结果：甲烷爆炸上、下限分别为13.9%、4.75%;甲烷浓度为9.5%的爆炸特性参数随距离变化规律;不同甲烷浓度对超压峰值和爆炸强度的影响;甲烷浓度在当量值附近时最大爆炸压力出现在距起爆点0.75m处,甲烷浓度在其它值时最大爆炸压力出现在罐壁处。本文数值分析了不同距离处燃烧速率、爆温、气体密度变化规律。 |
| 英文摘要: |
| Methane/air mixture explosion development was experimentally and numerically studied in a large-scale multiphase explosion experimental system (a 10m3 explosion vessel) and under 40J spark ignition condition. Center ignition was adopted and four pressure sensors were arranged at different distances from ignition point. Results show that methane explosion upper limit is 13.9% and lower limit is 4.75% respectively. The variety of explosion parameters with distance was obtained when methane concentration is 9.5%. The influence of methane concentration on peak overpressure was analyzed. The maximum explosion pressure appears at 0.75m from ignition point when methane is close to stoichiometric concentration; for other concentrations, the maximum pressure appears at vessel wall. The variety of combustion rate, explosion temperature, gas density with distance was numerically analyzed. |
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