建筑环境中有害气体扩散及分布的分析

利用温差射流原理分析了有害气体泄漏时在大气中扩散的特点；在与实验结果对比的基础上，对某建筑小区环境下有害气体连续泄出的扩散迁移过程进行了初步数值计算．结果表明，泄出气体的主运动方向沿大气流动方向发生偏转，气体浓度分布区的范围和形状主要与大气主流风速的大小、建筑物阻挡作用和气体泄出速度等因素相关．

Numerical simulation of the poisonous gas diffusion process around the buildings

In the paper, the characteristics of the gas diffusion when poisonous gas leakage occurred was discussed according to the principle of jet flow. By comparison with the experimental results, a primary numerical calculation was carried out, for which gas diffusion moves around a building when poisonous gas leakage occurred. The results have shown that the leakage poisonous gas veers the movement orientation of air and the concentration distribution are closely concerned with the factors such as the air velocity, inhibition of the building, velocity of the poisonous and so on.