Numerical Simulation on Smoke Control of Impulse Ventilation in a Large Underground Carpark

Nowadays many carparks have been installed impulse ventilation system and use it to control fire smoke in China. As there is few study on impulses ventilation system to control fire smoke, numerical simulations on fire smoke control using FDS 6.3.2 have been carried out in a carpark with 4000 m2. It is found that impulse ventilation can effectively help the firefighters by making the fire upstream with less smoke. Based on the analysis of the numerical simulation results, jet fan number and extract rate are two important parameters in impulse ventilation smoke control design.