摘要
利用半经验公式和CFD数值模拟两种方法,对超瘦高型中庭自然填充烟气层高度进行预测分析。利用FDS软件建立某超高层建筑内部超瘦高中庭的物理模型,对计算数据结果进行处理得出烟气分层的时间和高度,以及随时间变化的烟气前沿高度。将模拟结果和现有理论公式的计算结果相比较,探讨现有公式与推导模型的差异性及可能的原因,为后期火灾模拟试验设计及超瘦高型中庭内烟气层高度预测模型的深化研究奠定基础。
Using semi empirical formula and CFD mathematical simulation, predict and analyze the natural filling smoke layer height in ultra-thin atrium. Using FDS, the model of the ultra- thin atrium in an ultra-high building was built. By dealing with the calculation results, the time and height of smoke stratification were gotten, as well as the height of the frontier of the smoke changing with time. Comparing the simulation results and empiri- cal formula calculation, the difference and reasons were discussed, to set the base for fire simulation design and predicting natural fill- ing smoke layer height in ultra-thin atrium.
出处
《消防科学与技术》
CAS
北大核心
2017年第5期617-620,共4页
Fire Science and Technology
基金
中国建筑科学研究院应用技术研究项目“超瘦高中庭烟气控制关键技术研究”(20150111330730049)
