Abstract This paper presents the results of experimental studies of the main thermophysical characteristics of forest fuel materials (by the example of bark, needles, and leaves) with varying key parameters: the sample density (750–1120 kg/m3) and the size of the structure elements (60–150 μm). Each of these parameters is shown to have a significant impact on the thermal conductivity, heat capacity and temperature diffusivity of the sample. The following ranges of values of these characteristics within heating temperatures of 295–426 K have been established: thermal conductivity of 0.196–0.4748 W/(m∙K); heat capacity of 2047–3986 J/(kg∙K); and temperature diffusivity of 0.0026–0.00105 cm2/s. The most significant influence on the thermophysical characteristics of forest fuel was exerted by the density of the porous structure of the material. An increase in the value of this parameter in the range of 750–1120 kg/m3 has led to a 5–50% increase in thermal conductivity and heat capacity.

中文翻译：

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森林燃料结构对热物理特性的影响

摘要 本文介绍了具有不同关键参数的森林燃料材料（以树皮、针叶和树叶为例）的主要热物理特性的实验研究结果：样品密度 (750–1120 kg/m3) 和结构元素 (60–150 μm)。这些参数中的每一个都显示出对样品的热导率、热容和温度扩散率有显着影响。这些特性在 295-426 K 加热温度范围内的数值范围已经确定： 热导率 0.196-0.4748 W/(m∙K)；2047-3986 J/(kg∙K)的热容量；温度扩散率为 0.0026–0.00105 cm2/s。对森林燃料的热物理特性影响最大的是材料的多孔结构的密度。