着火房间最优化机械排烟效率理论分析  

Theoretical analysis for the optimization of mechanical smoke exhaust efficiency in a fire compartment

作　　者：雷晶晶 周汝[1,2] 蒋军成 诸德志[1,3] 何嘉鹏 王妍[1,2] LEI Jingjing;ZHOU Ru;JIANG Juncheng;ZHU Dezhi;HE Jiapeng;WANG Yan(College of Safety Science and Engineering,Nanjing Tech University,Nanjing 210009,China;Key Laboratory ofUrban and Industrial Safety,Nanjing Tech University,Nanjing 210009,China;Nanjing City FireDepartment,Nanjing 210009,China;College of Urban Construction,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]南京工业大学安全科学与工程学院,江苏南京211800 [2]南京工业大学江苏省城市与工业安全重点实验室,江苏南京211800 [3]南京市消防局,江苏南京210009 [4]南京工业大学城市建设学院,江苏南京211800

出　　处：《南京工业大学学报（自然科学版）》2018年第4期125-130,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金青年科学基金(51408306);江苏省危险化学品本质安全与控制技术重点实验室开放课题(HCSC20130)

摘　　要：为了探究高层建筑着火房间内的机械排烟效率,以南京市某写字楼为模型,建立双开口着火房间最优化机械排烟效率的理论计算模型;应用火灾动力学(FDS)软件对该建筑室内不同火灾场景的排烟效率进行数值模拟分析。对比理论计算模型及数值模拟研究结果可知:随着火源功率的增加,所需的机械排烟量逐渐增加,随着窗口宽度和门口宽度的增加,所需的机械排烟量逐渐减小;建立的理论计算模型可用于计算不同房间开口尺寸和火源功率下房间内安全状态时的机械排烟效率。In order to explore the efficiency of mechanical smoke exhaust in the fire compartment of the high-rise building,based on the model of an office building in Nanjing,the theoretical mathematical model of the optimal mechanical smoke exhaust efficiency was established in a fire compartment with double openings,and the fire dynamics simulator（ FDS） software was used to simulate the smoke exhaust efficiency of different fire scenarios in the building. Compared with the theoretical model and numerical simulation results,it was known that with the increase of the fire power,the mechanical smoke exhaust was increased gradually,and with the increase of the window width and door width,the mechanical smoke exhaust was gradually reduced; the theoretical mathematical model could be used to calculate the efficiency of mechanical smoke exhaust in the compartment under different sizes and fire powers when the compartment was in a safe state.

关 键 词：机械排烟 中性面 烟气层高度 双开口 

分 类 号：TU976.5[建筑科学]