Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
AN ANALYSIS OF THE INFLUENCE OF THE FIRE SOURCE LOCATION ON THE HOT GAS LAYER TEMPERATURE IN A PRE-FLASHOVER COMPARTMENT FIRE
Submission Author:
Calisa Lemmertz , RS
Co-Authors:
Calisa Lemmertz, Felipe Roman Centeno, Mohamed Beshir
Presenter: Calisa Lemmertz
doi://10.26678/ABCM.ENCIT2018.CIT18-0075
Abstract
This study aims to analyze the influence of the fire source location on the hot gas layer temperature in pre-flashover compartment fires. The heat release rate and the ventilation factor influence were also analyzed. A mesh resolution analysis was performed to ensure the quality of numerical results, this analysis included the calculation of the Measurement of Turbulence Resolution. The numerical model was validated comparing the obtained results to experimental data described by Steckler et al. (1982 and 1984), showing a good agreement. This study was based on two hundred and nineteen simulations based on the room geometry applied on Steckler’s experiment. Firstly, fifteen fire heat source positions at the ground level were tested to determine their influence on the temperature results. It was found that the transversal and longitudinal fire position (x and y axis) does not affect considerably the results, except when the fire is placed at a wall or at a corner. In a second analysis the fire source elevation influence was tested, and showed an important effect on the results. As the fire source was elevated, the hot gas layer and the maximum temperatures augmented as well as the interface layer height. So, we can conclude that the fire source location, primarily its elevation, is an important parameter to be considered during the pre-flashover compartment fire analysis.
Keywords
pre-flashover, compartment fire, heat source location, FDS
