수평 및 수직 개구부가 존재하는 구획실의 화재 현상에 대한 연구

Abstract

In this study, the fire phenomena in the enclosure with horizontal and vertical vents were investigated. Through a series of experiments and numerical simulations, the effects of the heat release rate (HRR) and horizontal vent area (HVA) on the temperature distribution in the enclosure and the thickness and average temperature rise of hot gas layer were examined. In addition, the velocity distribution, average velocity, and mass flow rate of the horizontal vent flow were analyzed with visualization of flame under various HRR and HVA conditions. The dependences of HRR and HVA on the experimental data of average hot gas layer temperature rise, and average velocity and mass flow rate of horizontal vent flow were confirmed. Additionally, the experimental data were compared with the numerical simulation results to confirmed the accuracy of numerical simulation method. Furthermore, for the average velocity and mass flow rate of horizontal vent flow, the theoretical correlation were compared with the experimental data, and their prediction accuracy were discussed. Then, the effect of horizontal vent location on fire phenomena was studied using the numerical simulation. At five horizontal vent locations, the temperature distribution in the enclosure, the thickness and average temperature rise of hot gas layer, and velocity distribution and mass flow rate of horizontal vent flow were examined. Based on the numerical simulation results, the previous correlations were assessed to predict the inclination of fire plume induced by the inflow through the vertical vent.