Abstract: Toxic gas formed by the non burning propellant which splashes down to the ground and evaporates and diffuses after the liquid propellant carrier rocket explods is harmful to missionary and ambience.The analytic model of the toxic gas,which is formed by residual propellant vapouring after liquid propellant rocket exploding and is diffusing in the atmosphere is presented.The distribution of the consistency field of ground gas in different environment and weather,and the process of toxic gas diffusion,are numerically simulated

Key words: Liquid propellant rocket engine;Launching site;Explosion accident;Propellant toxicity;Gaseous diffusion;Numerical simulation

摘要： 提出了液体推进剂火箭爆炸后残余推进剂蒸发形成的有毒气体在大气中扩散的解析模型， 并数值模拟了地面有毒气体浓度场在不同的环境、天气情况下的分布情况及环境参数对毒气扩散过程影响的分析， 能为工程应用提供实用的数据。

关键词: 液体推进剂火箭发动机;发射场;爆炸事故;推进剂毒性;气体扩散;数值仿真