中文摘要：

采用火灾动力学软件FDS6对隧道火灾开展数值模拟，得到不同火源功率下羽流区温度分布和纵向风作用下羽流撞击区最高温度．将模拟结果与FDS5的模拟结果进行对比发现，采用了新的湍流燃烧模型后，FDS6模拟的火源高温区集中在火羽流底部，燃烧产生的热量有相当部分通过热辐射的形式向周围空气传递，并导致隧道顶棚下方羽流撞击区温度明显低于FDS5的模拟结果．对纵向风作用下羽流撞击区最高温度的模拟结果表明，FDS6的预测值明显低于Kurioka模型预测值和隧道火灾实验值．

英文摘要：

Fire dynamics software FDS6 is used to simulate the scenarios of tunnel fire, the temperature distri- bution of the plume and the maximum temperature of plume impingement zone under the action of longitudinal wind are obtained with different fire power. With a new turbulent combustion model, the results of FDS6 show that the high temperature zone of fire source focus on the bottom of plume and a considerable part of plume heat transfer to ambient by thermal radiation. The heat transferred by convection in plume is reduced, and the temperature of the plume impact region under tunnel ceiling is obviously lower than the results of FDSS. The maximum temperature of plume impingement zone under the action of longitudinal wind obtained by FDS6 is significantly lower than the Kurioka model predictions and the tunnel fire experimental values.