关键词: 室外风, 烟气层温度, 烟气生成量, 烟气层高度, 高层建筑

Abstract: In order to study the influence of outside wind on fire smoke, multi-functional smoke movement and control experimental system was built. The effects of outside wind on smoke layer temperature, smoke production and smoke deposition were studied by simulating different wind speeds. The results showed that: when the wind speed is less than 0.75 m/s, the temperature of the smoke layer decreases rapidly with the increase of the wind speed, but when the wind speed increases again, the temperature of the smoke layer does not decrease slowly. The maximum temperature of smoke occurred in the range of 0.10 ~ 0.17 dimensionless distances in the downwind, and the temperature in the downwind of the fire source was generally higher than that in the upwind. The wind will greatly increase the smoke production, but with the increase of wind speed, the increasing rate of smoke production will become smaller and smaller. With the increase of wind speed, the maximum temperature gradient of the smoke layer interface decreases gradually, the smoke layer interface becomes more and more unclear, and the smoke will fill the whole space.

Key words: outside wind, smoke layer temperature, smoke production, smoke layer height, high-rise building