Abstract Radiant heat flux of fire plume is an essential parameter indicating the hazards of a fire. In this work, fire experiments of a wall-attached fire with different aspect ratios were conducted. In addition, the effect of the sidewall on mean flame height and radiant heat flux of the rectangular fire was investigated. The sidewall causes a decrease in air entrainment; therefore, the mean flame height is observed to increase. The radiant heat flux increased owing to the increase in flame height and thermal radiation from the heated sidewall. Experimental results of the mean flame height are consistent with those predicted by an existing model. This validated the reliability of the experimental setup for a rectangular wall-attached fire. Furthermore, a model based on the increase in flame height and thermal radiation from the heated sidewall was developed to estimate the radiant heat flux from a rectangular wall-attached fire. The error in prediction was less than 15% for this model.

中文翻译：

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矩形源产生的贴壁火羽辐射热通量的实验研究

摘要 火羽辐射热通量是表征火灾危险性的重要参数。在这项工作中，进行了具有不同纵横比的壁挂火的火灾实验。此外，研究了侧壁对矩形火的平均火焰高度和辐射热通量的影响。侧壁导致空气夹带减少；因此，观察到平均火焰高度增加。由于火焰高度的增加和加热侧壁的热辐射，辐射热通量增加。平均火焰高度的实验结果与现有模型预测的结果一致。这验证了矩形壁挂火实验装置的可靠性。此外，开发了一个基于火焰高度增加和加热侧壁热辐射的模型，以估计矩形壁挂火的辐射热通量。该模型的预测误差小于 15%。