Simulation Study On Fire Diffusion Of Subway Tunnel

As quickly increase of economic and population, metro becomes one of the most important means of transportation for citizens. People concern more on the fire due to Subway tunnel, because it causes loss of lives and belongings.This papers do the research of Subway tunnel, the temperature field of fire in sub tunnel and the regulation of pressure in fire included. While on the base of calculating, the papers discuss the emergent aid in sub tunnel fire.The paper firstly intro the domestic and foreign research status about tunnel interval fire; Then do a simple analysis of the characteristics of subway tunnel engineering, and the interval fire, destruction, main reason and effect factors;Secondly, the report analyzes and discusses the subway environmental air in the system airflow movement characteristics, air currents energy equation and momentum equations, and the resistance of the metro ventilation system; Third, using computational fluid dynamics of metro tunnel CFD modeling, set physical model and mathematical fire model to analyse, set boundary conditions and the initial conditions of the fires,studying the temperature field distribution and pressure field distribution, while discussing the smoke sex metro fires condition; Finally using CFD model, points for subway fire conditions, model and simulate analysis of the temperature field and tunnel interval pressure field distribution, and for different factors, analysis temperature distribution regularity in fire tunnel interval.Through the analysis, this paper analyzes the fire metro tunnel interval the temperature field and stress field distribution situation and diffusion regularity, and on this basis, analyzes the scale and ventilation fire on fire the wind tunnel interval temperature distribution and the influence of diffusion rule.