杉木木束干燥过程中水分的非稳态扩散

Unsteady-state moisture diffusion in the drying of Chinese fir wood bunch

通过在不同恒定的温度场中的试验,研究分析了人工林杉木(Cunninghamia lanceolata)木束在高温干燥中,木束内部水分在非稳态状态下的扩散及其影响因素.在高温干燥情况下,水分扩散系数随温度的升高而增大,水分扩散系数也随直径的增加而增加.并探讨了木束水分在非稳态状态下的扩散规律,为合理地制定木束干燥工艺提供科学依据.

Moisture diffusion of Chinese fir wood bunch in artificial plantation at the unsteady state and the influencing factors were studied at different steady temperatures.The results show that moisture diffusion coefficient grows with the rise of temperature and the increase of burch diameter duing the high temperature drying. The diffusion under the unsteady condition was discussed, which provides a scientific basis for rational drying of wood bunch.