超瘦高中庭烟羽流蔓延中危险因素变化研究

Study on the change of risky factorssmoke plume spread in ultra-thin high atrium

超高层建筑中庭内发生火灾,产生烟气对该类中庭内人员生命和财产安全造成严重的安全威胁。研究烟羽流蔓延过程中危险因素的变化规律,对超瘦高中庭烟气控制具有及其重要的意义。运用FDS数值模拟和理论计算公式两种方式,展开对烟羽流蔓延过程中的危险因素进行探究,分析温度变化、能见度变化和CO浓度变化三方面的变化规律,并以数值模拟结果为基础,拟合出不同危险因素在时间或空间维度上的变化关系曲线,求解对应公式,为后续排烟方式等深入研究奠定基础。

The fire in the atrium of super high-rise buildings produces smoke,which poses a serious security threat to the life and property safety of people in this kind of atrium.The study on the change law of risk factors in the process of smoke plume spread is of great significance to the smoke control of ultra-thin and high atrium.FDS numerical simulation and theoretical calculation formula are used to explore the risk factors in the process of smoke plume spread,analyze the change laws of temperature change,visibility change and CO concentration change,fit the change relationship curves of different risk factors in time or space dimension based on the numerical simulation results,and solve the corresponding formulas,Lay a foundation for further research on smoke exhaust methods.