Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Numerical simulation of exhaustion and ventilation systems in an underground subway station in Brazil
Submission Author:
Beatriz Cortez Rodriguez dos Santos , SP , Brazil
Co-Authors:
Beatriz Cortez Rodriguez dos Santos, Amanda Sayuri Oizuni, Gustavo Saturnino, Cibele Silva, Fernando Kurokawa
Presenter: Beatriz Cortez Rodriguez dos Santos
doi://10.26678/ABCM.COBEM2023.COB2023-1985
Abstract
The metro-railway system in Brazil transports millions of passengers daily, but there are currently no regulations governing the ventilation and exhaust systems used in these trains. Furthermore, they provide a viable solution to road overcrowding as they are underground constructions that do not disturb the chaotic dynamics that occur on the surface. Because unforeseeable accidents can occur during subway operations, it is difficult to predict the potential damage they may cause. Moreover, in the case of fire, smoke is the most dangerous factor for the lives of users. So, it is essential that the administration of this complex has an emergency management plan to deal with these eventualities. Studying the progression of smoke through fire simulations can provide guidance for a safe exit during the evolution of combustion within the subway station. It can also provide information on changes that can be made in the operating configurations and composition of the set: platform, tunnel, and wagon, in order to minimize damage in this scenario. Numerical simulation is a method that allows the analysis and understanding of the behavior of physical phenomena in the real world through mathematical modeling using computers. So, when creating a model, it is possible to predict a range of possible occurrences in a given process and clarify potential responses or decisions in the event of setbacks. Thus, an open source CFD software was used to perform two-dimensional simulations on a geometry of a subway station in order to test different scenarios of smoke propagation and air movement. Therefore, this study aims to address the greatest number of possible consequences of the movement of air and smoke in case of fire in the grouping of subway lines and stations. Additionally, it aims to analyze the ventilation and exhaustion systems and the operating modes implemented in the metro station and check whether they are efficient. So that in the future, the developed work may serve as a basis for a transformation in the panorama that involves the lack of standardization in the examination area.
Keywords
CFD (Computational fluid dynamics), Exhaust System, Ventilation, Subway station
