TY  - JOUR
PY  - 2007//
TI  - Tunnel fires: experiments on critical velocity and burning rate in pool fire during longitudinal ventilation
JO  - Journal of fire sciences
A1  - Roh, Jae Seong
A1  - Yang, Seung Shin
A1  - Ryou, Hong-Sun
SP  - 161
EP  - 176
VL  - 25
IS  - 2
N2  - In this study, the 1/20 reduced-scale experiments using Froude scaling are conducted to investigate the effect of longitudinal ventilation velocity on the burning rate in tunnel fires. The methanol pool fires, acetone pool fires, and n-heptane pool fires with a heat release rate ranging from 2.02 to ~6.15 kW, 2.76 to ~11.04 kW, and 2.23 to ~15.6 kW, respectively, are used. A load cell is used to measure the mass loss rate of the burning fuel and the temperature distributions are measured by K-type thermocouples in order to investigate smoke movement. The ventilation velocity in the reduced-scale tunnel is controlled by the wind tunnel through an inverter. In the case of a methanol pool fire, the increase in ventilation velocity reduces the burning rate. On the contrary, for acetone and n-heptane pool fires, the increase in ventilation velocity leads to the enhanced burning rate of fuels. The reason is that, for acetone and n-heptane pool fires, the oxygen supply effect prevails rather than the cooling effects as the ventilation velocity increases. However, for a methanol pool fire the cooling effect outweighs the effects of oxygen supply. The relationship between the critical velocity (Vc, m/s) and the heat release rate (Q, MW), for a full tunnel, has been found to be:[ILLEGIBLE].<p /> <p>Language: en</p> 
LA  - en
SN  - 0734-9041
UR  - http://dx.doi.org/10.1177/0734904107067300
ID  - ref1
ER  -