摘要
利用FDS数值模拟,研究隧道坡度以及宽高比对隧道火灾顶棚烟气温度的影响。结果表明,隧道坡度对隧道上坡方向顶棚烟气温度分布影响不明显,随着坡度的增大,隧道下坡方向顶棚烟气温度与羽流撞击区域最高烟气温度均会降低;隧道顶棚羽流撞击区域最高烟气温度随着隧道截面宽高比的增大而增大,上坡方向和下坡方向顶棚烟气温度均随着宽高比的增大而降低。提出了不同坡度与宽高比隧道顶棚最高烟气温升预测模型。
The impact of slope and aspect ratios on the smoke temperature beneath the ceiling in tunnel fires was studied by FDS.The results showed that the slope of the tunnel has no effect on the temperature in the uphill direction of the tunnel,and the smoke temperature in the downhill direction of the tunnel as well as the maximum temperature of plume impingement area decrease with the increase of the tunnel slope;the maximum smoke temperature of plume impingement area increases with the increase of the ratio of tunnel width to tunnel height,and the smoke temperature at both downhill and uphill directions of the tunnel decreases with the increase of aspect ratio.A model was proposed to predict the maximum smoke temperature rise beneath the ceiling in tunnel fires for different slope and aspect ratios.
作者
门庆民
刘传进
MEN Qing-min;LIU Chuan-jin(Yantai Fire Detachment, Shandong Yantai 264003, China;Tianjin Guang'an Fire Technology Service Co., Ltd., Tianjin 300074, China)
出处
《消防科学与技术》
CAS
北大核心
2018年第2期187-189,共3页
Fire Science and Technology
