FLUENT在丙烷泄漏扩散研究中的应用

Application Research of FLUENT on Propane Gas Leakage Diffusion

应用FLUENT软件对某光纤企业丙烷泄漏后的扩散进行数值模拟,在设置边界条件及计算模型的前提下,探究丙烷扩散规律,得到泄漏后丙烷气体的速度、温度、密度、质量浓度等分布情况.结果显示,泄漏后丙烷气云速度由超声速变至亚声速,最后在距泄漏源较远处近似环境风速;在泄漏口垂直方向上,温度呈规律性变化,风口处变化最为明显,近地面温度变化缓慢,反之亦然;密度在泄漏源处可达1.49kg/m3,随着扩散逐渐接近空气密度;泄漏后大气中丙烷的含量从开始向周边先增大后减小,垂直方向上近地面丙烷含量较其他区更高.此结果可为该种易燃易爆气体的污染监控提供一定的理论依据.

Using FLUENT software to simulate the propane gas leakage in a fiber optic company. By setting boundary conditions and calculation model, the propane diffusion regularitywas explored. Vertically in mouth of leakage, temperature changed regularly, obviously in the outlet and slowly near the surface, vice ver- sa. Density in the leaking source can reach 1.49 kg/ma, approaching air density with the diffusion. After leak- age, the propane content in atmosphere first increases then decreases from the beginning to the surrounding. The propane content is higher than that of other area along vertical direction near the ground. The results could be used to this kind of flammable and explosive gas pollution control to provide certain theoretical basis.