喷淋保护下玻璃表面水膜流动的动力学模型  

Dynamics model of water film flow on glass surface under sprinkler protection

作　　者：官钰希[1] 方正[1] 唐智[1] 

机构地区：[1]武汉大学土木建筑工程学院,武汉430072

出　　处：《水动力学研究与进展（A辑）》2015年第4期425-432,共8页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金资助项目(50978206)~~

摘　　要：利用"玻璃+窗式喷淋系统"进行防火分隔,玻璃表面能否形成连续稳定的水膜是玻璃不会破裂的关键。该文利用流体动力学原理建立了界面切应力作用下玻璃表面水膜稳定流动的动力学模型,推导出维持水膜稳定流动的终限流速与喷头流量间的函数关系式,探讨了终限流速下水膜的厚度与工程应用流量的限制条件,分析了影响水膜厚度的各种因素,并与前人的研究成果进行了对比分析。Using glass with window type sprinkler system in the fire partition, whether a continuous and stable water film on glass surface is able to be formed or not, is the key of protecting the glass not break. The principle of fluid dynamics is applied to build the dynamics model of water film steadily flowing on glass surface under the action of interfacial shear stress, and function relation between the final limit flow rate of water film and the sprinkler discharge rate is derived for maintaining water film steadily flowing. The water film thickness and the engineering flow constraints under the final limit flow rate are explored, and the various factors affecting the water film thickness are analyzed. The results are compared and analyzed with previous researches.

关 键 词：玻璃 防火分隔 水膜流动 动力学模型 终限流速 

分 类 号：X924.4[环境科学与工程—安全科学]