Numerical Study on Fire characteristics in Force-Ventilated Compartment with different air inlet locations

Abstract

The effects of air inlet locations on fire characteristics in force-ventilated compartment were investigated by computational fluid dynamics (CFD) simulations. The flame behaviour, the oxygen concentration above fire, the distribution of soot concentration and velocity of smoke in the closed compartment were discussed. The results show that the flame behaviour was mainly affected by the inflow air flow, and the flame inclined to the opened inlet in one-inlet scenario. The flame was found inclined to the exhaust vent in two-inlet scenarios. The difference between the soot concentrations in upper and lower space of the compartment was smaller in one-inlet scenarios compared with that in two-inlet scenarios, and the soot concentration was more uniform in the scenarios with higher air inlet elevation. The velocity of smoke on the side of inlet was larger than the other side in one-inlet scenario, which might cause stronger entrainment on the side with air inlet. In the two-inlet scenarios, the velocities of smoke on the sides of two air inlets were almost the same.