Study on the Effect of Blockage Ratio on Maximum Smoke Temperature Rise in the Underground Interconnected Tunnel

The model-scale tunnel is used in this investigation to analyze the maximum smoke temperature rise of interconnected for various longitudinal ventilation velocities, blockage ratios, and heat release rates where fire at confluence underground tunnel. results showed that velocities both ramp upstream source adjacent influenced under tunnel, ramps jointly affected rise. change depends on who more by velocity or vehicle ratio. As increases, convective transfer near resulting a decrease rise, effect ratio reduced. In paper, prediction model suitable case proposed.