摘要: 为研究主线坡度对分岔隧道主线隧道内火灾烟气蔓延的影响,采用数值模拟,分析分岔前主线不同坡度与火源功率下隧道内的温度分布,提出考虑主线坡度和火源功率的隧道顶棚最高温升预测模型和主线隧道下游温度纵向衰减模型。结果表明:给定热释放速率下,随主线坡度增加,隧道内最高温升逐渐降低;主线隧道坡度越大,火羽流向主线隧道下游倾斜越明显,顶棚下最高温度位置向下游偏移;主线隧道下游烟气层厚度随隧道坡度增加而减小,主线隧道下游纵向温升也随之降低。
刘茜1, 汪彬1, 李程2, 黄有波1,3, 董炳燕1. 主线坡度对分岔隧道主线隧道内顶棚温度分布的影响[J]. 消防科学与技术, 2024, 43(9): 1303-1308.
(1. School of Safety Science and Engineering,Chongqing University of Science and Technology, Chongqing 401331, China; 2. Guangxi Vocational & Technical Institute of Industry, Guangxi Nanning 530001, China; 3. State Key Laboratory of Fire Science, University of Science and Technology of China, Anhui Hefei 230026, China). Influence of mainline slope on ceiling temperature distribution in mainline tunnel of bifurcated tunnel[J]. Fire Science and Technology, 2024, 43(9): 1303-1308.