Abstract Scale criterion has been proposed for tunnel fires, however, some parameters are usually not feasible to be implemented. In this study, numerical and experimental simulations have been performed to validate the scale criterion. First, the wall thickness parameter was studied since it plays an important role in the heat conduction. The results of the simulations were compared with Hu’s full-scale experimental data. Then, the other ambient temperature and wall materials parameters were investigated through the numerical simulations. Furthermore, a series of experiments were conducted in two reduced-scale tunnel tables. The simulation results showed that when the ambient temperature varied with the scale criterion, the decay speed of the dimensionless smoke temperature for the 1/18 scale becomes a little smaller. Experimental results showed that the decay speed of dimensionless temperature rises if both the asbestos and steel board was smaller. However, the decay speed in the cases of steel boards was larger than that of the simulation results. Moreover, when the aluminum silicate board was used as the wall material, the results of numerical simulations agreed well with experiments in the near-field. But when x/H > 4, the decay speed of dimensionless temperature rise for experiments was larger than numerical simulations.

中文翻译：

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墙体参数在隧道火灾中的标度应用

摘要 隧道火灾尺度准则被提出，但有些参数通常不可行。在这项研究中，已经进行了数值和实验模拟来验证尺度标准。首先，研究壁厚参数，因为它在热传导中起重要作用。模拟结果与胡的全尺寸实验数据进行了比较。然后，通过数值模拟研究了其他环境温度和壁材料参数。此外，在两个缩小比例的隧道表中进行了一系列实验。仿真结果表明，当环境温度随尺度准则变化时，1/18尺度的无量纲烟温衰减速度变小。实验结果表明，如果石棉和钢板都较小，则无量纲温度的衰减速度会加快。然而，钢板情况下的衰减速度大于模拟结果。此外，当采用硅酸铝板作为壁材时，数值模拟结果与近场实验吻合良好。但当 x/H > 4 时，实验的无量纲温升衰减速度大于数值模拟。数值模拟的结果与近场实验非常吻合。但当 x/H > 4 时，实验的无量纲温升衰减速度大于数值模拟。数值模拟的结果与近场实验非常吻合。但当 x/H > 4 时，实验的无量纲温升衰减速度大于数值模拟。