An Improved Method for Determining The Interface Height of Smoke Layer in A Tunnel Fire

Smoke layer interface height is an important parameter in fire safety science. In this paper, two methods are proposed on the basis of integral ratio method and least squares method. a series experiments were conducted 1:10 scale model tunnel for determining smoke fire. The determined by new have been compared with other existing approaches, including method, N-percentage rule. comparison results show that based transition can be relatively reasonable agree well visual observations all experimental condition. addition, usage scenarios considerations rule also discussed.