热障效应影响下的超高层塔冠空间排烟模拟与优化设计  

Simulating and Optimizing Smoke Exhaust Design in the Crown of Super Highrise Buildings under the Thermal Barrier Effect

作　　者：张彤彤 袁磊[1,2] 张中圣 田靓 曹笛 ZHANG Tongtong;YUAN Lei;ZHANG Zhongsheng;TIAN Liang;CAO Di

机构地区：[1]深圳大学建筑与城市规划学院,深圳518000 [2]深圳建筑环境优化设计研究实验室,深圳518000 [3]郑州大学建筑学院,郑州450001

出　　处：《建筑学报》2022年第5期78-83,共6页Architectural Journal

基　　金：国家自然科学青年基金项目(51908357,51708509)。

摘　　要：通过研究超高层建筑烟气蔓延特性,明确热障效应对烟气沉降与人员逃生的不利影响,以探寻其塔冠空间排烟口与补风口的位置对火灾烟气沉降时间的影响。使用气流模拟软件Fluent和烟气模拟软件Pyrosim进行仿真模拟实验,得到室内温度竖向分布梯度与火灾烟气蔓延肌理。通过改变排烟口、补风口的位置高度,设置火灾场景,构建对比模拟实验,分析沉降面高度随时间变化的关系,提出相对高效的排烟设计优化方案,从而减缓热障效应对烟气的影响。By studying the smoke spreading characteristics within super highrise buildings, this paper identifies the adverse effects of thermal barrier effect on smoke settlement and personnel escape,to explore the influence of the location of exhaust vents and auxiliary vents in the crown space of super highrise buildings on the settlement time of fire smoke. Using the flow simulation software Fluent and flue gas simulation software Pyrosim for simulation, it explicates the vertical distribution gradient of indoor temperature and the spreading fabrics of fire smoke. By changing the height of smoke outlets and ventilation outlets, setting fire scenarios, constructing comparative simulation experiments,and analyzing the relationship between the height of settlement surface and the change of time, this paper contends for an optimized smoke exhaust design with relatively higher efficiency,so as to reduce the influence of thermal barrier effect on smoke.

关 键 词：热障效应 塔冠空间 烟气蔓延 排烟模拟 优化设计 

分 类 号：TU972.4[建筑科学—建筑设计及理论]