Corner fires are known to spread more intensely in comparison with single wall fires. In view of the challenges associated with prediction of such fire behavior, the fire growth in a corner configuration of Medium Density Fiberboard (MDF) panels is investigated to provide a set of experimental data, performing Single Burning Item (SBI) tests. First, though, test results with inert calcium silicate panels are discussed for three values of HRR (10, 30 and 55 kW), allowing to address the main physics involved. The experimental data for 30 kW, the default SBI HRR, is used for detailed discussion of the observations. The SBI testing methodology, materials, and set-up are described. The results of total Heat Release Rates (HRR) and Smoke Production Rates (SPR), as well as the panel temperatures and total heat fluxes at several characteristic locations are analyzed. Moreover, the puffing frequency of the corner fire is characterized thanks to Video Fire Analysis (VFA) of the experimental footage. Additionally, flame heights are discussed, including the concept of mirroring. A new correlation for mean flame height is introduced, using the hypotenuse of the triangle as characteristic length for entrainment of air into the fire plume, and expressing that the flame height increases proportional to the square root of the fire heat release rate. The 30 kW propane burner of the standard SBI test is shown to feature a mean flame height of nearly 0.9 m and a puffing frequency of 2 ± 0.3 Hz, and an average total heat flux exceeding 44 kW/m² near the burner early on in the test. The completeness of the dataset is expected to be useful for testing and development of CFD codes for corner fire scenarios.

中文翻译：

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角落火灾的实验研究——第一部分：惰性面板测试

众所周知，与单墙火灾相比，角落火灾蔓延得更剧烈。鉴于与预测此类火灾行为相关的挑战，研究了中密度纤维板 (MDF) 面板角落配置中的火灾增长，以提供一组实验数据，执行单燃烧项目 (SBI) 测试。不过，首先讨论了惰性硅酸钙板的测试结果，适用于三个 HRR 值（10、30 和 55 kW），从而可以解决所涉及的主要物理问题。30 kW 的实验数据（默认 SBI HRR）用于详细讨论观察结果。描述了 SBI 测试方法、材料和设置。总放热率 (HRR) 和发烟率 (SPR) 的结果，以及分析了几个特征位置的面板温度和总热通量。此外，由于实验镜头的视频火灾分析 (VFA)，角火的喷发频率得以表征。此外，还讨论了火焰高度，包括镜像的概念。引入了平均火焰高度的新相关性，使用三角形的斜边作为夹带空气进入火羽的特征长度，并表示火焰高度的增加与火热释放率的平方根成正比。标准 SBI 测试的 30 kW 丙烷燃烧器显示具有接近 0.9 m 的平均火焰高度和 2 ± 0.3 Hz 的喷气频率，并且在早期燃烧器附近的平均总热通量超过 44 kW/m²测试。