In order to provide the theoretical reference to the emergency rescue for the explosion accident of methyl alcohol va-por in the tunnel,the CFD numerical simulation method was applied to study the influence laws of the number of tankers and their relative positions to the ignition source on the pressure field of methyl alcohol vapor explosion under the condition that the distribution spacing of the same tanker with the size of 10 m×2.5 m×3 m was fixed in the tunnel. The results showed that the existence of tankers made the overpressure of methyl alcohol vapor explosion in the tunnel significantly increase,and the time for the explosion to reach the maximum overpressure reduced. The peak overpressure of explosion increased with the increase of the number of tankers,and when the number of tankers increased from 0 to 4,the peak overpressure of methyl al-cohol vapor explosion in the tunnel increased from 89.4 kPa to 559.4 kPa. When only one tanker existed,the relative posi-tion of the tanker to the center of ignition source could influence the distribution of pressure field around the tanker during the explosion process,which made the pressure around the tanker increase.%为了给隧道内甲醇蒸气爆炸事故的应急救援提供理论参考,应用CFD数值模拟方法,在同种槽罐车(尺寸为10 m× 2.5m×3m)分布间距固定的情况下,研究了隧道内槽罐车数量及其相对点火源位置对甲醇蒸气爆炸压力场的影响规律.研究结果表明:槽罐车的存在使隧道内甲醇蒸气爆炸超压明显增大,爆炸达到最大超压用时减少;爆炸超压峰值随槽罐车数量的增加而增大,当槽罐车数量从0增加到4时,该隧道内甲醇蒸气爆炸超压峰值由89.4 kPa增大到559.4 kPa;当只有1辆槽罐车存在时,槽罐车相对点火源中心的位置可以影响爆炸过程中槽罐车周围压力场的分布,使槽罐车周围压强增大.
展开▼
