Abstract In this paper, the capability of Froude scaling modeling to replicate the fire dynamics in full-scale Murcia Atrium Fires tests equipped with natural and transient forced ventilation was investigated experimentally and numerically by using a 2:27 physical Scale Down Model (SDM) of the full-scale Atrium and CFX-Ansys16.2, respectively. Five SDM experiments were conducted using different heptane fire capacities located at the center of the floor. Two different turbulence models were used for simulation i.e. Shear Stress Transport and k − ε. Experimental results of the SDM and full-scale atrium fire tests were compared with those predicted for SDM through the preservation of the Froude number to cover the gap in experimental facts and scientific understanding. This study focused primarily on the transient temperatures at near and far fire fields and the descending smoke layer. The predicted velocity and visibility were assessed. This study demonstrated that Froude scaling modelling is acceptable from a threshold of greater than 50% of the full-scale.

中文翻译：

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配备自然和瞬态强制通风的中庭火灾中的 Froude 缩放建模

摘要 在本文中，通过使用 2:27 物理比例缩小模型 (SDM)，在配备自然和瞬态强制通风的全面穆尔西亚中庭火灾测试中，弗劳德缩放模型复制火灾动力学的能力进行了实验和数值研究。分别为全尺寸 Atrium 和 CFX-Ansys16.2。使用位于地板中心的不同庚烷燃烧容量进行了五次 SDM 实验。两种不同的湍流模型用于模拟，即剪切应力传递和 k - ε。通过保留弗劳德数，将 SDM 和全尺寸中庭火灾测试的实验结果与 SDM 预测的结果进行比较，以弥补实验事实和科学理解方面的差距。这项研究主要集中在近、远火场和下降烟层的瞬态温度。评估了预测的速度和能见度。该研究表明，从大于满量程的 50% 的阈值开始，弗劳德标度建模是可以接受的。