中文摘要：

为了准确预测无约束气云爆炸产生的热辐射伤害效应,利用计算流体力学技术对无约束空间内甲烷与空气预混气云爆炸的非稳态流场进行了数值计算,得到了气云爆炸热辐射伤害效应的分布规律及伤害半径确定方法.研究结果表明：热剂量峰值与气云的质量有关,随距离呈指数衰减规律.与同质量凝聚相炸药相比,气云爆炸的热伤害效应范围更大,热剂量随距离的衰减更缓慢.

英文摘要：

In order to forecast the injury effects of thermal radiation generated from unconfined vapor cloud explosion,the unsteady flow field of premixed vapor cloud explosion with methane and air in unconfined space was numerically calculated by computational fluid dynamics technology.The distribution laws and method to calculate injury radius of thermal radiation generated from vapor cloud explosion were obtained.The results indicate that the peak value of the thermal dose is closely related to the mass of vapor cloud,and it assumes exponential attenuation law versus distance.The thermal injury range of vapor cloud explosion is larger than that of condensed matter explosion source with same mass,and the thermal dose of the former attenuates more slowly versus distance than that of the latter.