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A meshfree analysis of the thermal behaviors of hot surface glass pane subjects to down-flowing water film via smoothed particle hydrodynamics

机译:通过平滑的粒子流体动力学进行热表面玻璃窗格对羽流动水膜的热行为的网图

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摘要

Glass cooling using water film depends on several parameters such as heat flux, down-flowing velocity, and thickness of water film. The efficiency of glass protection with water film can be significantly enhanced through a proper combination of the fire and water film parameters. This study aims to present an in-depth investigation into the influence of the heat flux, down-flowing velocity and thickness of water film parameters on the thermal behavior of glass panes during a fire and to propose new guidelines to enhance the efficiency of the water film glass protection system. Smoothed particle hydrodynamics (SPH) method is used here to simulate glass cooling with a down-flowing water film. Based on several SPH simulation scenarios of glass cooling at a different fire and water film working conditions, new empirical equations are derived to describe the effects of heat flux, down-flowing velocity, and thickness of water film on the temperature drop in glass and water film. Furthermore, these empirical equations were employed to study the evaporation of water film and to compare the efficiency of the cooling mechanism with different down-flowing velocity and thickness of water film. The simulation results confirm that increasing down-flowing velocity is more efficient in glass cooling than increasing water film thickness.
机译:使用水膜的玻璃冷却取决于若干参数,例如热通量,下流速和水膜的厚度。通过对火和水膜参数的适当组合可以显着提高与水膜的玻璃保护效率。本研究旨在深入调查在火灾期间玻璃窗的热行为对水膜参数的影响进行深入调查,并提出新的准则来提高水的效率电影玻璃保护系统。这里使用平滑的粒子流体动力学(SPH)方法以模拟玻璃冷却与流动的水膜。基于不同火灾和水膜工作条件下的玻璃冷却的几种SPH仿真场景,得出了新的经验方程来描述热通量,羽流速,水膜厚度对玻璃和水中的温度下降的影响电影。此外,采用这些经验方程来研究水膜的蒸发,并比较冷却机构具有不同羽流速和水膜厚度的效率。仿真结果证实,在玻璃冷却方面越来越有效,而不是增加水膜厚度。

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