Thermal plume temperature profile of buoyancy-driven ceiling jet in a channel fire using ceiling smoke extraction

Experiments were carried out in a horizontal channel to investigate the longitudinal thermal plume temperature distribution of buoyancy-driven ceiling jet beneath the ceiling with the coupling effect of longitudinal wind and ceiling extraction. It was found that: (a) the thermal plume longitudinal temperature decays faster in upstream than that in downstream with combination of both ceiling extraction and longitudinal wind; (b) a new correlation is proposed to characterize buoyant thermal plume longitudinal temperature distribution beneath ceiling in both upstream and downstream direction. The predictions of the proposed model are in good agreement with the experiment measured value.