Abstract:

A section of L shape pipe gallery model was established using PyroSim software and fire numerical simulation was carried out. The temperature was analyzed using Origin software. The influence of fire source characteristics (location and power of fire source) and ventilation conditions (wind speed and direction) on smoke spread and temperature change in pipe gallery was studied. The results showed that when the fire source is located in the middle of the corridor and the power is high,high temperature and toxic fumes can fill the entire pipe gallery in a shorter time, the fire risk is higher. Excessive wind speed causes a large amount of smoke to accumulate at the corner, so the smoke exhaust effect is not directly proportional to the wind speed.

Key words: underground pipe gallery, numerical simulation; smoke spread, temperature change