Numerical Simulation Of Fire Smoke Spread In Corridor Of Teaching Building

Teaching building is the school's and college's main building. In the teaching building, staff are relatively concentrated, especially the student-quantity's density is large. And because of the large volume, there are many inflammable objects. Therefore, the fire load and fire hazard exist at all times. In case of fire in teaching building, the corridor can accelerate the spread of fire smoke, and prevent the people escaping. So it is of great significance to study on corridor's fire smoke movement in teaching building.First, the mathematical model of the field model was established. And the basic elements of the fire scenario then were determined such as the fire source, the value of heat release rate and the curve of the heat release rate. Finally, corridor fire in a five-story college teaching building was simulated by fire field simulation software FDS. This paper has targeted three types of simulated fire scenarios, including: the different ventilation openings, the different fire locations in the same size on the same floor and the fire scenarios in different floors in the same location with the same size.Through the comparative analysis about the simulations, the results show that: The same fire size is that fire heat release rate is 6 MW. When the fire is in a corridor on the first floor in the teaching building, the situation in the corridor is safe. But the gas temperature in stairs between the stairwell rapidly increases with the stairwell height growing. And the temperature rises to 50℃during 200s, which poses a threat on the staff to escape; when the fire is in the middle floor, the smoke layer height, smoke temperature and visibility are in compliance with safety standards. When the fire is on the top floor, smoke in the corridor begins spreading after 300s, particularly the smoke layer height is about 1.6m where the distance is more than 40m along the corridor from the fire source position, and 400s later the smoke temperature is above 30℃where the distance is 20m away from the fire source,the highest nearly 50℃somewhere, so it's a threat on the personnel evacuation.From the research, some significant conclusions were drawn. The conclusions are of great importance and application in fire prevention and evacuation, especially for the staff studying teaching building fire safety engineering and personnel evacuation. At the same time, the work will be a base for further investigation.