瓦斯爆炸极弱冲击波反射压力计算方法研究

发布时间：2018-04-29 05:17

本文选题：瓦斯爆炸 + 固壁反射　；参考：《工业安全与环保》2015年12期

【摘要】：为确定瓦斯爆炸极弱冲击波在固壁反射后峰值压力的变化特征,用爆炸力学理论分析和实验测试方法研究了反射压力与环流压力在冲击波马赫数不远大于1时的变化规律。理论推导给出了反射压力的一般计算方法;借助实验测定了爆炸冲击波在巷道一般空气区传播时不同位置固壁反射压力与环流压力的换算关系,即反射压力大约为环流压力的2倍。爆炸实验结果表明,冲击波固壁反射后,反射超压瞬间急剧增加,极弱冲击波正向作用于相对垂直固定的物体上时,产生的伤害和破坏效应远远大于水平方向上的物体;理论计算值与实验值基本吻合,验证了反射超压是加重井下设备破坏和人员严重伤害的重要因素说法。
[Abstract]:In order to determine the characteristics of the peak pressure of the very weak shock wave of gas explosion after the reflection of the fixed wall, the variation of the reflection pressure and the circulation pressure when the Mach number of the shock wave is not far above 1 is studied by means of the explosion mechanics theory and the experimental test method. In this paper, the general calculation method of reflection pressure is given, and the conversion relationship between the reflection pressure of solid wall and circulation pressure at different positions during the propagation of explosion shock wave in general air zone of roadway is measured by experiment. That is, the reflection pressure is about twice as high as the circulation pressure. The results of the explosion experiment show that the reflection overpressure increases sharply after the shock wave is reflected on the fixed wall. When the very weak shock wave acts positively on the relatively vertical fixed object, the damage and damage effect is far greater than that of the horizontal object. The theoretical calculation value is basically in agreement with the experimental value, which verifies that the reflection overpressure is an important factor to aggravate the damage of underground equipment and serious injury to personnel.
【作者单位】：河南工程学院安全工程学院;
【基金】：河南省科技攻关计划项目(132102210448) 河南工程学院博士基金资助(062701/D2013019)
【分类号】：TD712.7

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