Experimental Study of the Exchange Flow Through a Horizontal Ceiling Vent in Atrium Fires: Criteria of Supply Air and Pressure Necessary for Uni-Directional Flow.
Experimental Study of the Exchange Flow Through a
Horizontal Ceiling Vent in Atrium Fires: Criteria of
Supply Air and Pressure Necessary for Uni-Directional
Flow.
(672 K)
Yamada, T.
NISTIR 6030; June 1997.
U.S./Japan Government Cooperative Program on Natural
Resources (UJNR). Fire Research and Safety. 13th Joint
Panel Meeting. Volume 2. March 13-20, 1996,
Gaithersburg, MD, Beall, K. A., Editor(s), 21-29 pp,
1997.
Available from:
National Technical Information Service
Order number: PB97-184204
Keywords:
fire safety; fire research; atria; ceilings; vents; flow
rate; experiments; salt water; ceiling vents; oxygen
consumption
Abstract:
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
condition.
