Abstract
In order to evaluate the stack effect of the smoke shaft installed in a fire compartment, a series of experiments was conducted with a reduced scale model. Flow rate of exhaust gas through the shaft and smoke height in the compartment were measured. And these experimental data were compared with the predictions based on two layer zone model.
As a result, it was found that a certain adjusting parameter was required for prediction of smoke exhaust flow rate in order to predict experimental results with good accuracy. Because the smoke shaft exhausts fresh air of lower zone as well as smoke of upper layer, when the smoke layer thickness under the inlet of the shaft becomes thin.
