本文针对简单的民房建筑,应用fluent软件,分别对建筑物内有无障碍物的条件下天然气泄漏后的扩散进行模拟。结果表明,在连续泄漏的情况下,建筑物内的障碍物会对天然气扩散产生一定的阻挡,在其后方形成一定的漩涡,使得天然气的浓度偏高。这些结果可以为应急避难及房屋内物品摆放提供依据。 In this paper, for simple residential buildings, the fluent software is applied to simulate the diffusion of natural gas after the leakage of natural gas in the buildings with or without obstacles. The results show that in the case of continuous leakage, obstacles within the building will have a certain barrier to the diffusion of natural gas, forming a certain eddy behind it, resulting in the high concentration of natural gas. These results can provide the basis for emergency shelter and the placement of objects in the house.