烟气自通道向中厅大空间扩散的实验研究

热烟气由单室经通道向中厅大空间溢流是受限空间火灾中重用的排烟通风问题，它在火场新鲜空气补充及火势向未燃区的蔓延过程中起着重要的作用，而且对火灾的监测、扑救及避险逃生有着重要的意义。本文的实验测量了通道向大空间溢流的准稳态温度场和速度场，得到了出口溢流平均速度与火源功率之间的关系式。实验结果表明：通道出口的热烟气溢流可以近似地认为是二维湍浮力射流，采用二维射流模型可以改进已有的烟气溢流计算方法、提高工程计算的准确度，这对火灾安全工程具有实用意义。

Experiment Study of Overflow of Smoke to Atrium

It is an important promem that overflow of smok. from a room to atrium in con-fined space fires. The overflow effect the ambient fluid and fire spread. According to theobersevation mesurement and theory analysis, a 2D-model are presented which can beused to calculate the volume mass momentum and buoyancy flux as well as the mount ofentrainment of ambient air plume rise and the prediction of the time of smoke fill up the atrium.