Research on smoke exhaust effect at different installation height of mechanical exhaust port in ring corridor of high-rise building

摘要

In high-rise building fire, smoke is the main cause of fire spreading and casualties. As a necessary evacuation route, it's very important for both evacuation and firefighting to ensure the effectiveness of smoke exhaust in corridor. While in mechanical exhaust system in corridor, the height of the exhaust port is a main factor that influences the smoke exhaust effect. FDS software was used in this paper to carry on the numerical simulation. Smoke exhaust effect under different working conditions were studied through comprehensive analysis of the smoke layer temperature and visibility in annular corridor with different mechanical smoke exhaust port height. Results show that installation height of the mechanical smoke exhaust port has some influence on smoke layer temperature and visibility. With the lower of the installation height of mechanical smoke exhaust port, smoke layer temperature at 1.5m height of corridor rises gradually, and visibility reduces gradually. All above can provide some reference for designing mechanical exhaust system in ring corridor of high-rise buildings.