探究室内气体燃料泄漏后的扩散特性及危害范围的影响,采用CFD软件FLUENT对室内丙烷连续泄漏扩散浓度变化过程进行数值模拟,研究丙烷的浓度场分布和爆炸浓度范围的变化规律。结果表明:水平射流运动和重力对气体的扩散有显著的影响;墙壁对气体的扩散有阻碍作用,在近壁面处形成高浓度区域;爆炸危险区随泄漏时间的增加而先增大后减小。 Exploring the diffusion characteristics and harm scope of gas leakage in indoor, the CFD software FLUENT was used to simulate the continuous diffusion of propane, and the concentration field distribution and explosion concentration range of propane were studied. The results show that horizontal jet movement and gravity have a significant influence on gas diffusion. The wall hinders the gas diffusion and forms a high concentration area near the wall. The explosion danger zone first increases and then decreases with the increase of leakage time .