大空间建筑火灾烟气层高度扩散的数值模拟

Numerical Study on the Change of Smoke Layer Length in Large Space Building Fires

采用数值模拟手段对某机场候机大厅的烟气填充情况进行研究,大空间中热烟气层的发展与火源的功 率、大空间的几何尺寸有关;随着火源强度的增加,烟气层稳定的高度会下降.研究结果可以为大空间建筑的防 排烟系统的设计提供参考．

Smoke filling in a full-scale terminal hall in airport was studied by using numerical modeling. Results show hot smoke layer development in large space building fires is mainly depended on the fire source power and the size of large space. Moreover, with the increase of the heat release rate of fire, the velocity of ceiling jet and ceiling temperature will increase, the stable smoke height will decrease. Numerical results can be used to guide the fire safety design of large space buildings.