| 马尾松木材在高温干燥中的水分扩散性 |
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| 引用本文： | 苗平,顾炼百.马尾松木材在高温干燥中的水分扩散性[J].林业科学,2002,38(2):103-107. |
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| 作者姓名： | 苗平 顾炼百 |
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| 作者单位： | 南京林业大学木材工业学院,南京,210037 |
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| 摘 要： | 对马尾松木材在高温干燥过程中的水分非稳态扩散进行了研究 ,结果表明当含水率高于纤维饱和点时 ,水分扩散系数随含水率的降低而增加 ;当含水率低于纤维饱和点时 ,水分扩散系数随含水率的下降而减少。马尾松木材的径向扩散系数大于弦向扩散系数。随着温度的升高和相对湿度的降低 ,木材的横向水分扩散系数增大
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| 关 键 词： | 高温干燥 非稳态扩散 扩散系数 |
| 修稿时间： | 2000年9月15日 |
MOISTURE UNSTEADY-STATE DIFFUSION DURING HIGH TEMPERATUREDRYING OF MASSON PINE TIMBER |
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| Miao Ping\ Gu Lianbai.MOISTURE UNSTEADY-STATE DIFFUSION DURING HIGH TEMPERATUREDRYING OF MASSON PINE TIMBER[J].Scientia Silvae Sinicae,2002,38(2):103-107. |
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| Authors: | Miao Ping\ Gu Lianbai |
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| Institution: | Nanjing Forestry University\ Nanjing 210037 |
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| Abstract: | Moisture unsteady state diffusion in radial and tangential directions during high temperature drying of Masson pine timber was tested and researched in this paper. The results are as follows: When moisture content above fiber saturation point (F.S.P.), the moisture diffusion coefficients of Maasson pine timber are increasing with moisture content decreasing; when moisture content below F.S.P., the moisture diffusion coefficients of Masson pine timber are decreasing with moisture content decreasing. Radial moisture diffusion coefficients are greater than tangential moisture diffusion coefficients. Moisture diffusion coefficients across grain direction increase with medium temperature increasing and humidity decreasing. |
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| Keywords: | High temperature drying Unsteady state diffusion Diffusion coefficient |
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