管廊内火源高度与防火封堵耦合作用下温度分布

Distribution of temperature under coupling action of fire source height and fire blocking in pipe gallery

为研究管廊内火源高度与防火封堵耦合作用下的温度分布,搭建了1∶3的缩尺寸马蹄形管廊模型,通过改变火源的高度和管廊一端的开闭情况,分析管廊内的温度分布。结果表明,高度为10 cm的火源较其他高度的火源在管廊一端封闭的情况下最高温度值最大。在垂直方向上,管廊内的烟气层厚度与火源高度和一端是否封闭关系不大,始终为17 cm左右,实验还得出了管廊内纵向最高温升的预测公式。

In order to study the temperature distribution in the pipe gallery under the coupling effect of fire source height and fire blocking,a 1∶3 model of the reduced horseshoe pipe gallery was built.By changing the height of fire source and the opening and closing condition of one end of the pipe gallery,the temperature distribution in the pipe gallery was analyzed.The results showed that the fire source with a height of 10 cm has the highest maximum temperature compared with the other fire sources.In the vertical direction,the thickness of the smoke layer in the pipe gallery doesn’t matter much to the height of the fire source and whether one end is closed.It is always 17 cm.The prediction formula of the maximum longitudinal temperature rise in the pipe gallery is also obtained from the experiment.