Thermal plume temperature profile of buoyancy-driven ceiling jet in a channel fire using ceiling smoke extraction. (August 2018)

• Record Type: Journal Article
• Authors: Tang, Fei; Cao, Zhilei; He, Zhen; Ling, Xiang; Wang, Qiang
• Is Part Of: Tunnelling and underground space technology. Volume 78(2018)
• Page Start: 215
• Page End: 221
• Publication Date: 2018-08
• Subjects: Buoyancy ceiling flow -- Temperature decay -- Longitudinal wind -- Ceiling extraction -- Channel fire; Tunneling -- Periodicals; Underground construction -- Periodicals; Tunnels -- Periodicals; Underground areas -- Periodicals; 624.193
• DOI: 10.1016/j.tust.2018.04.028
• Languages: English
• ISSNs: 0886-7798

Abstract

Highlights: Plume temperature decay experiments were studied in a channel. Temperature profile with ceiling extraction effect was considered. An empirical model was built and correlated well the measured data. Abstract: 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.