INVESTIGATIONS OF SMOKE GAS COMPOSITION DURING A CAR FIRE

摘要

A car was set on fire to investigate the evolution of temperature and of gaseous fire products in thepassenger compartment. The aim was to identify the conditions for self-rescuing of passengers. Theinvestigation of smoke gas temperatures and smoke gas composition during this car fire are presented inthis work. The car was put on fire by an ignited mixture of diesel and petrol in a small pan under the fronttyres below the engine compartment. A dummy was placed on the driver’s seat, which was equipped withseveral thermocouples. The resulting temperatures during the fire show the actual temperatures directly onthe dummy. The smoke gases were analysed using FTIR spectroscopy. The gases were collected througha removable probe sensor, corresponding to the nose of the dummy in the passenger compartment. Thegases were continuously collected and analyzed during the whole period of the car fire. The compositionof the gases changed during the fire, depending on the temperature in the passenger compartment.Furthermore, various specific plastic car parts, like upholstered seats, side panel, flooring, car dash board,car sun shield, etc. were investigated in the Smoke Density Chamber to evaluate the contribution of theseparts to the smoke emission and smoke gas composition during a car fire.