Abstract
This paper is reviewed of the heat exhaust effectiveness during fire by installing chimney in the road tunnel, an experiment is carried out on a 1/5 scaled model tunnel, and report on this results to evaluate the numerical simulation. The model tunnel geometry and experimental conditions were set by considering Froude Number and Reynolds Number which are similarities of fire phenomenon. The amount of the heat flux that is vented from the chimney exhaust, it has shown that in the thermal fume average temperature increase in front of the vent is proportional to the 3/2 power. Results were same tendency even though it became thermal fume temperature rise. It is also shown that the heat exhaust efficiency is within a range of 0.44 to 0.61 and almost completely independent from the inside the thermal fume in front of the chimney. Furthermore, a universal validity of results of the model tunnel experiment, that LES simulator "Fireles" verified effect of the tunnel length of downward of chimney, the stream place of around chimney is almost the same, and exhaust heat flux proportional to the 3/2 power of thermal fume temperature rise have been valid similarly.
