巷道风速对火灾烟气扩散距离的影响数值分析

Numerical Analysis on Smoke Distribution Distance Affected by Roadway Air Velocity

为分析火灾过程中巷道风速对工作面巷道中烟气扩散速度与距离的影响,对工作面巷道火灾烟气扩散过程进行了分析,采用FLUENT对不同风速条件下工作面巷道中CO烟气扩散过程与规律进行了数值模拟与分析,结果表明:在回风侧巷道中CO扩散距离与巷道风速呈正相关,在进风侧巷道与风速呈负相关,同时,CO在进风巷道扩散过程中出现停滞状态,随风速增加,扩散停滞时间与距离逐渐减小。

In order to study the influence of the air velocity on the smoke distribution velocity and distance in the roadway in the process of the fire, this paper analyzed the smoke diffusion process in the tunnel. The smoke spread characteristics with different air - speed in the tunnel were simulated and analyzed with Fluent software. The simulation results show that there is a position correlation between CO distribution distance in the return - side tunnel and air - speed. And there is a negative correlation between CO distribution distance in the intake - side tunnel and roadway air velocity. Meanwhile, the CO distribution in the intake - side tunnel seems to stop. And the stopping time and distance decrease as air - speed increases.