建筑火灾烟气迁移特性研究及排烟设计

bstract: On the foundation of theoretical research of fire smoke transfer,modeling the dormitory building based on FDS large eddy simulation(LES) and Smagorinsky Sub-grid scale model.The research shows that the harmful gas CO concentration changed similar in the horizontal direction, the products of harmful gas composition can spread to the long-distance along the horizontal direction and own concentration little changed, CO concentration peak changed ladder-like with the height significantly. From the numerical simulation results, it had been proved that why a large number of staff have died in the long-distance. The main reason may be that people inhaled a lot of the on-coming(not coming back) harmful gas CO and proposed improvements of the structural design of building fire against high-rise building fire smoke migration issues. In this paper, the numerical simulation provided information theory for the future of the full-size experiment and has a guiding role on evaluation of buildings fire smoke.