Three-dimensional simulation analysis of smoke flow controlled by longitudinal ventilation in long tunnel fire

To meet the need of research on fire safety system for the long highway tunnels,the numerical simulation study of the longitudinal ventilation control on fire smoke flow in the long highway tunnel was presented in this paper.Based on the calculated result,the different effects on smoke temperature under various ventilation controls were compared.The velocity change of the airflow passing through fire zone was also analyzed.From the analysis,the distribution characters and development of smoke in tunnel fire were generalized,which may provide the reference background for fire prevention design.