Abstract: Based on theoretical analysis and small-scale experiments, the influence of different slope composition and fire power on the smoke flow and temperature distribution in asymmetric V-shaped tunnel under fire conditions was studied when the fire was located at the variable slope point. The results show that, due to the influence of thermal pressure difference caused by the asymmetric structure on both sides of the slope change point, the flow characteristics and temperature distribution of smoke in the tunnel on both sides of the V-shaped tunnel are different. The smoke flow is affected by the fire power and the slope composition on both sides of the V-shaped tunnel, and the longitudinal ceiling temperature prediction model in the asymmetric V-shaped tunnel is obtained.

Key words: asymmetric V-shaped tunnel, smoke movement, fire, temperature distribution model