Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
NUMERICAL SIMULATION OF STRATIFIED FLOW IN A PRE-CHAMBER OF SMOKE-PROOF STAIR
Submission Author:
Airque Assis , ES
Co-Authors:
Airque Assis, Lucas Spancini Bobbio, Michel de Oliveira dos Santos, Renato Siqueira
Presenter: Lucas Spancini Bobbio
doi://10.26678/ABCM.COBEM2019.COB2019-2271
Abstract
One of the greatest difficulties in a fire is in the smoke control , and it is fundamental that structures designed to promote exhaustion and prevent the spread of these harmful gases work properly. The present study uses computational fluid dynamics to model the stratified flow in smoke proof stairs chambers, in order to evaluate the effects of the variation of measures stipulated by technical norm on the exhaustion of smoke. We analyzed the changes in the distance between the ceiling and the smoke outlet and the aspect ratio of the smoke outlet as well. The results showed that there is no significant variation in the smoke exhaust flow when the distance between the ceiling and the smoke outlet increase, but there are negative implications regarding the efficiency of the chamber when the aspect ratio of the same opening increase, the exhaust flow being more sensitive to the change of this geometric parameter.
Keywords
fire control, Computational Fluid Dynamics, smoke exhaust, Natural Convection, smoke proof stairs chamber
