自然环境中偏二甲肼蒸发扩散规律预测仿真

Forecast Simulationof Evaporation and Diffusion of Unsym-Dimethyl Hydrazine in Natural Environment

为预测有毒液体推进剂偏二甲肼在自然环境中蒸发扩散规律,采用流体力学软件FLUENT,对大气环境下蒸发容器中纯偏二甲肼的蒸发扩散过程进行了数值仿真。并利用在某基地蒸发实验获取的测量数据对仿真模型进行有效性验证,分析了不同风速、不同源强条件下有毒气体蒸发后的毒气浓度分布情况。仿真表明,风速越大,推进剂蒸发扩散的速度越快。单位体积内源强的大小以及环境温度和压强对推进剂的蒸发扩散影响不大。

Numerical simulation is carried out using a kind of CFD software named Fluent in order to forecast evaporation and diffusion of unsym - Dimethyl hydrazine in natural environment. The concentration distribution of the toxic vapor was analyzed under different inflow speeds and different source intensions. The results show that unsy - Dimethyl hydrazine evaporation and diffusion speed are higher with higher inflow speed. There is no significant influence of the source intension, environment temperature and pressure on the evaporation and diffusion of unsym - Dimethyl hydrazine.