Ventilation mode analysis of exhaust smoke system for subway station fire

Theoretical analysis and CFD simulations are applied in the paper to analyze the various possible ventilation mode of exhaust smoke system for a subway station fire. The results show that the effect of exhausting smoke of different ventilation mode is quite different. And for different positions of fire source, the corresponding optimal ventilation mode is various. The subway design code gives the basic principle for the design of exhaust smoke system for the subway station fire, but adopting what kind of ventilation mode should be determined by the analysis on the actual fire case.