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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。
The use of “glass + window spray system ” fire separation, the glass surface can form a continuous and stable water film is the key to the glass will not be broken. In this paper, the dynamic model of the steady flow of water film on the glass surface under the interface shear stress was established by using the principle of hydrodynamics. The relationship between the final flow rate and the flow rate of the nozzle was derived. The relationship between the final flow rate The thickness of the sewer membrane and the restriction of engineering application flow rate, the various factors affecting the thickness of the water film were analyzed and compared with the previous research results.