地采暖单层大空间火灾烟气运动理论及实验研究

Theoretical analysis and experimental study on smoke movement in single storied large spaces using ground heating

从地暖采暖导致的单层大空间环境中的温度梯度出发,理论分析该环境中室内火灾烟气的运动规律,建立适用于该环境的火灾烟气上升阶段和下降阶段的模型,初步分析火灾烟气上升阶段的影响因素。设计建造小规模实验装置,分12种工况对地暖采暖环境中的火灾烟气运动规律进行实验研究,得到烟气羽流速度随高度的变化及烟气层高度随时间的变化等,验证该环境中火灾烟气运动的理论模型。

Considering the temperature gradient caused by ground heating in single storied large spaces,the special movement of smoke was analyzed theoretically,the models of the buoyancy and filling movements of smoke were developed,and the effects of some factors on the smoke movement were initially studied.A small-scale experimental facility was designed and experiments for 12 scenarios were carried out to investigate the smoke movement in ground heating environment.The change of velocity of smoke plume with height and the change of height of smoke layer with time and so on were studied to verify the theoretical model of smoke movement in this environment.