Conceptual Simulation Of Bus Fire by FDS

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Soori, Ahmad | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46924 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Farhanieh, Bijan
Abstract:
Buses are among safe means of transportation; however, they have a risk of a fire catastrophe with high fatalities if fire occurs in a situation where escape is difficult. In this study, numerical simulation is used to investigate bus fire using Fire Dynamics Simulator of NIST. Five fire scenarios have been considered to investigate the impact of doors and ceiling windows on fire with the aim of protecting the lives of passengers and controlling fire. In the simulations, time of flashover, temperature distribution near the ceiling, heat release rate and smoke distribution are investigated. Results show that scenarios with open ceiling windows are appropriate for passenger safety as they have high impact in decreasing smog and temperature. The scenarios in which the doors are closed on 2 minutes after ignition are the best-case scenario to control the fire because of reduced HRR due to lack of oxygen. It was also seen that flash over occurs 2.5 to 3 minutes after ignition in all scenarios and passengers shall evacuate within this time
Keywords:
Bus ; Natural Ventilation ; Bus Fire ; Bus Safety ; Flashover

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