This paper studies the character of smoke by fire model test in tunnel,emphasizes on the law of smoke distribution t analyses the length,velocity and thickness of refluxed zone.

• 通过对隧道火灾模型试验,研究隧道发生火灾时烟流性态,着重对隧道内的烟流扩散规律、烟流逆流层的长度、逆流速度、逆流层厚度进行了试验数据的分析。