Abstract

The paper analyzed the influence of external airflow on natural smoke ventilation in large space by means of computational fluid dynamics (CFD) and engineering calculation. The purpose of the paper is Terminal 1 of Taiwan Taoyuan International Airport after renovation. In the renovation project, the separate departure and arrival halls will be connected to create a large atrium; natural smoke ventilation will be adopted as the smoke control strategy for the new space. As external airflow may directly impact natural smoke ventilation, the study means to investigate the extent to which external airflow influences natural smoke ventilation by analyzing scales of fire and presence of external airflow. Conclusions of the study are as follows: 1) when directly affected by headwind, entrances and exits on the first floor pose danger to the safety of certain parts of the floor; 2) when directly affected by headwind, natural smoke ventilation becomes weaker than when unaffected; 3) in the case study, natural smoke ventilation proves effective under the premise that the scale of fire is less than 2000 kW.

Key words: Airport terminal, natural smoke ventilation, external airflow, evacuation safety, FDS.