摘要
木材热学参数在木材干燥的理论研究中十分重要。由于种种原因,绝大多数木材热学参数都是一片空白。利用准稳态法测量了不同含水率下巨尾桉和青杨径向和弦向的导热系数和比热。试验结果表明含水率在巨尾桉和青杨的热学性质的影响因素中起主要作用。其热学参数与含水率成曲线关系,且随含水率增加导热系数、比热增大,导温系数减小。通过回归分析得到了相关度0.98以上导热系数、比热的经验公式,并与现有文献中的公式进行了比较。
It is very important to research thermal parameters of wood in the theoretical research of drying wood. But the thermal parameters of the most of tree species are a blank due to various reasons. Use of quasi - steady state method to measure thermal conductivity and specific heat on the radial and tangential direction, of Eucalyptus and Populns cathayana at different moisture content. The experimental results show that the moisture content play a major role in influential factors of thermal parameters of Eucalyptus and Populus cathayana. The thermal parameters are curve relation with the moisture content. With increasing moisture content, the thermal conductivity and specific heat increases and thermal diffusivity decreases. Calculating empirical formulas on thermal conductivity and specific heat by regression analysis, and eompared with other literatures. The correlation degree with empirical formulas is more than 0.98.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2010年第1期102-105,112,共5页
Journal of North China Electric Power University：Natural Science Edition
关键词
导热系数
比热
导温系数
影响因素
巨尾桉
青杨
thermal conductivity
specific heat
thermal diffusivity
influential factors
Eucalyptus
Populus,cathayana
