摘要
通过对电梯运动产生的活塞效应的理论进行相关分析,采用CFD工具FDS5.4.1建立高层建筑典型的竖向疏散通道物理模型,选择大涡模拟方法进行数值模拟,研究电梯在不同运行过程中竖向疏散通道中的烟气运动规律,分析前室与建筑空间的压力差及烟气运动路径、速度的变化。模拟结果显示:电梯活塞效应会使电梯井及其前室的压力发生变化,电梯运动使得前室与建筑空间之间的压力差呈现先升后降的趋势;电梯向下运动一定程度上可以减缓烟气的扩散,而电梯向上运动会加速烟气通过前室向其它楼层地扩散。
The theory of the piston effect generated by the movement of the elevator shaft is analyzed,the CFD tool FDS5.4.1 is used to build high-rise building vertical evacuation routes physical model,the large-eddy simulation method numerical simulation is chosen to study the smoke movement in the evacuation routes during the different elevator shaft operation,the pressure difference between the lobby and the building space is analyzed,the smoke movement path and velocity is provided.The simulation results show that： The pressure of the elevator shaft and antechamber will be changed by the elevator piston effect,the trend of the pressure difference between antechamber and architectural space will be first increased and then decreased impacted by the elevator movement;the downward movement of elevator can reduce the smoke spread in a certain extent,the upward movement of elevator will accelerate the smoke spread to other floors.
出处
《建筑科学》
北大核心
2011年第1期20-23,32,共5页
Building Science
关键词
电梯
活塞效应
烟气
数值模拟
elevator
piston effect
smoke
numerical simulation
