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高温下含湿土壤水汽潜热效应的试验研究

Yunshan XU,Zhaotian ZENG,Dean SUN,Haibo LYU

Journal of Disaster Prevention and Mitigation Engineering（2017）

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Abstract
目前国内外关于高温下土壤水汽潜热效应的研究极其缺乏,制约了对高温下土壤热特性的充分认识.通过高温下3种不同质地土壤的热导率试验,探讨并分析了土壤水汽潜热效应及水蒸汽运移增强因子η取值的变化规律.结果表明,温度梯度作用下,土壤内部会产生水汽潜热效应,且温度越高,现象越明显;高温引起的潜热效应贡献值有明显的峰值,并存在滞后现象;水蒸汽运移增强因子17较依赖于土壤质地和饱和度,但其取值规律仍然不明确.
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Key words
latent heat effect,enhancement factor,temperature effect,soil texture
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