| 应用热脉冲法确定土壤热参数的可行性研究 |
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| 引用本文： | 李婷.应用热脉冲法确定土壤热参数的可行性研究[J].安徽农业科学,2016,44(16):31-34. |
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| 作者姓名： | 李婷 |
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| 作者单位： | 镇江市工程勘测设计研究院,江苏镇江,212000 |
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| 摘 要： | 利用自行研制的土壤热特性试验系统,测定了4种质地的土壤热特性,计算了不同质地土壤在不同含水率情况下的热扩散率,并与热传导方程解析解法计算的热扩散率进行比较。结果表明,利用热脉冲方法计算的热扩散率比解析解法计算的热扩散率值略微偏大。但是,利用2种方法计算所得到的土壤温度剖面相差不大,相对误差均小于5%。由此可见,利用热脉冲方法确定土壤热扩散率是可行的。
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| 关 键 词： | 土壤热参数 热脉冲 土壤质地 |
Determination of Soil Thermal Parameters by Heat Pulse Method |
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| Abstract: | Thermal properties of four texture soils were detected by the self-developed soil thermal test system. Thermal diffusivity of four texture soils with different water contents was calculated. Through comparing thermal diffusivity determined by heat pulse and analytical solution, the re-sult indicated that soil thermal diffusivity determined by heat pulse were appreciably larger than the one determined by analytical solution method. But comparing the temperature profile based on thermal diffusivity, the results indicated that a little difference existed between two methods, and the relative error was less than 5%. Therefore, it was shown that the determination method of thermal diffusivity with heat pulse was feasible. |
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| Keywords: | Soil thermal transfer parameter Heat pulse Soil texture |
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