During a fire event, ventilated facade systems may contribute to external fire spreading to the upper floors of a building via the facade, thus representing a significant risk. In this frame, the performance of a typical ventilated facade system under fire conditions is experimentally investigated, using a full-scale compartment-facade test rig. Two alternative facade configurations are examined and comparatively assessed, namely a plain facade (PF) and a ventilated facade (VF) system. Emphasis is given on the estimation of the thermal characteristics of the developed Externally Venting Flames (EVF) and the thermal boundary conditions developing on the facade's exposed surface. An extensive set of sensors was installed at the interior of the fire compartment, the facade systems and the exterior of the test configurations. Analysis of the experimental data suggests that even though gaseous combustion products managed to penetrate the air cavity of the VF system, no consistent flaming conditions were established. On the unexposed face of both PF and VF systems, temperatures remained constantly below 180C throughout the duration of both fire tests. The Eurocode correlations are assessed against the obtained experimental data; certain parameters, such as EVF length, width and centreline temperature, are found to be under-estimated by the Eurocode methodology.

中文翻译：

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火灾条件下通风外墙系统的性能：一项实验研究

在火灾事件中，通风立面系统可能会导致外部火灾通过立面蔓延到建筑物的上层，从而构成重大风险。在此框架中，使用全尺寸隔间外墙测试台对火灾条件下典型通风外墙系统的性能进行了实验研究。检查并比较评估了两种可选的立面配置，即普通立面 (PF) 和通风立面 (VF) 系统。重点是对已发展的外部排放火焰 (EVF) 的热特性和在立面暴露表面上发展的热边界条件的估计。大量的传感器安装在防火隔间的内部、外墙系统和测试配置的外部。对实验数据的分析表明，即使气态燃烧产物设法穿透 VF 系统的气腔，也没有建立一致的燃烧条件。在 PF 和 VF 系统的未暴露面上，在两次火灾测试期间，温度始终保持在 180C 以下。欧洲规范相关性根据获得的实验数据进行评估；某些参数，例如 EVF 长度、宽度和中心线温度，被欧洲规范方法低估了。欧洲规范相关性根据获得的实验数据进行评估；某些参数，例如 EVF 长度、宽度和中心线温度，被欧洲规范方法低估了。欧洲规范相关性根据获得的实验数据进行评估；某些参数，例如 EVF 长度、宽度和中心线温度，被欧洲规范方法低估了。