Experimental Study of the Exchange Flow Through a Horizontal Ceiling Vent in Atrium Fires.
Experimental Study of the Exchange Flow Through a
Horizontal Ceiling Vent in Atrium Fires.
Yamada, T.; Cooper, L. Y.
U.S./Japan Government Cooperative Program on Natural
Resources (UJNR). Fire Research and Safety. 12th Joint
Panel Meeting. October 27-November 2, 1992, Tsukuba,
Japan, Building Research Inst., Ibaraki, Japan Fire
Research Inst., Tokyo, Japan, 63-66 pp, 1992.
fire safety; fire research; atria; ceilings; vents; flow
rate; experiments; salt water; ceiling vents; oxygen
This study is directed at understanding an exchange flow
rate through a single top vent in an atrium-type
compartment with a fire experimentally and obtaining
basic knowledge of physical mechanism for developing a
comprehensive atrium fire model. A series of
experiments was conducted with two reduced scale cubic
models with propane gas burner as a heat source. Under
various conditions of heat release rate and top vent
area, the exchange flow rates were estimated by oxygen
consumption method. The result indicates that the
dimensionless exchange rate of hot/cool gas is closed to
an experimental constant value obtained by salt-water
experiments in the past under small vent aspect ratio