This study presents the results from a set of 11 large‐scale open fire tests performed on flexible polyurethane foam slabs/mattresses. The purpose of the study was to investigate the influence of the ignition location on the fire behaviour of the foam slabs and to generate data on a highly characterised material that could be used for modelling work in the future. A method for obtaining spatially resolved flame spread data for this type of material was presented using a gridded array of 5 × 10 thermocouples placed on the underside the foam slab and from this, flame spread was examined using three different approaches. The heat release rate (HRR) results showed clear shapes forming that were dependent on the ignition location, with two distinct behaviours being observed between the various different ignition locations, this was also observed in the calculated flame spread rate (FSR) data. Results within an individual test, showed the calculated range of FSRs over the geometry of the slab varied between approximately 1 and 8 mm/s depending on the ignition location. The average FSR values between tests varied between 3 and 7 mm/s and the maximum and minimum values were calculated to be approximately 11 and 2 mm/s respectively.

中文翻译：

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着火位置对聚氨酯泡沫板火焰蔓延和放热率影响的实验研究

这项研究显示了对挠性聚氨酯泡沫板/床垫进行的11项大规模露天试验的结果。这项研究的目的是研究点火位置对泡沫板着火行为的影响，并生成有关高度表征材料的数据，这些数据可用于将来的建模工作。提出了一种使用5×10热电偶的网格阵列来获得此类材料的空间分辨火焰传播数据的方法，该阵列放置在泡沫板的下面，并由此使用三种不同方法检查了火焰传播。放热率（HRR）结果表明，形成清晰的形状取决于点火位置，在不同的点火位置之间观察到两种不同的行为，在计算出的火焰扩散率（FSR）数据中也可以观察到这一点。单个测试的结果表明，根据点火位置的不同，整个平板几何形状的FSR计算范围约为1至8 mm / s。试验之间的平均FSR值在3到7 mm / s之间变化，最大和最小值分别计算为大约11和2 mm / s。