以某小室火灾为研究对象,采用多维计算机数值模拟技术,使用大涡模拟方法,分别对有水喷淋和无水喷淋两种工况下小室内部温度和烟气密度变化趋势进行模拟计算,并对计算结果进行详细分析;同时结合实际场景有无水喷淋的工况,对其进行温度、能见度和一氧化碳浓度的对比分析。结果表明,水喷淋对小室火灾具有明显的降温作用,对一氧化碳有很好的抑制作用。但由于水喷淋和烟气的相互作用,关键高度处的烟气密度有所升高。模拟结果为小室火灾的水喷淋设提供了科学依据。 Taking a small chamber fire as the research object, the multi-dimensional computer numerical simulation technique and the large eddy simulation method were used to simulate the changes of the indoor temperature and the smoke density under the two conditions of water spray and waterless spray respectively. At the same time, the temperature, visibility and carbon monoxide concentration were compared with the actual scene with or without water spray. The results show that the water spray has a significant cooling effect on the chamber fire and has a good inhibitory effect on carbon monoxide. However, due to the interaction between water spray and flue gas, the smoke density at the critical height has increased. The simulation results provide a scientific basis for the water spray in small room fire.