Abstract Glass facade is gaining popularity in modern commercial buildings in recent several decades. The thermal stability of facade structural elements then becomes a great concern in building fire safety. To provide a guidance for glass facade fire protection, an experimental study on the vertical temperature distribution of window plume with apparent external flames was carried out. Experiments were performed by employing reduced-scale compartment facade models with a single wall and with double walls. A propane gas burner, installed at the center of the compartment floor, served as a fire source to simulate quasi-steady state room fires. When apparent external flames exist, the shapes of vertical temperature profile varied with both opening geometry and heat release rate (HRR). Empirical temperature models which considered the effect of volumetric heat release phenomenon was developed by employing mean flame heights as the characteristic length scales. The measured temperature profiles showed a three-phase distribution feature and were well correlated with the dimensionless vertical distance.

中文翻译：

---

在单层和双层幕墙场景中完全发展的隔间火灾产生的窗户羽流的热行为

摘要 近几十年来，玻璃幕墙在现代商业建筑中越来越受欢迎。立面结构元件的热稳定性成为建筑防火安全的一个重要问题。为为玻璃幕墙防火提供指导，开展了具有明显外部火焰的窗羽垂直温度分布的实验研究。实验是通过采用具有单壁和双壁的缩小隔间立面模型进行的。安装在隔间地板中央的丙烷气燃烧器作为火源来模拟准稳态房间火灾。当存在明显的外部火焰时，垂直温度分布的形状随开口几何形状和放热率（HRR）而变化。通过采用平均火焰高度作为特征长度尺度，开发了考虑体积放热现象影响的经验温度模型。测得的温度曲线显示出三相分布特征，并且与无量纲垂直距离很好地相关。