本文選題：潛熱效應(yīng) + 增強(qiáng)因子��； 參考：《防災(zāi)減災(zāi)工程學(xué)報》2017年04期

【摘要】：目前國內(nèi)外關(guān)于高溫下土壤水汽潛熱效應(yīng)的研究極其缺乏,制約了對高溫下土壤熱特性的充分認(rèn)識。通過高溫下3種不同質(zhì)地土壤的熱導(dǎo)率試驗,探討并分析了土壤水汽潛熱效應(yīng)及水蒸汽運(yùn)移增強(qiáng)因子η取值的變化規(guī)律。結(jié)果表明,溫度梯度作用下,土壤內(nèi)部會產(chǎn)生水汽潛熱效應(yīng),且溫度越高,現(xiàn)象越明顯;高溫引起的潛熱效應(yīng)貢獻(xiàn)值有明顯的峰值,并存在滯后現(xiàn)象;水蒸汽運(yùn)移增強(qiáng)因子η較依賴于土壤質(zhì)地和飽和度,但其取值規(guī)律仍然不明確。
[Abstract]:At present, there is a lack of research on the latent heat effect of soil moisture at high temperature at home and abroad, which restricts the full understanding of the thermal properties of soil at high temperature. Through the thermal conductivity test of 3 different textural soils at high temperature, the variation law of the latent heat effect of soil vapor and the value of the enhancement factor of water vapor migration is discussed and analyzed. Under the action of gradient, the latent heat effect of water vapor will be produced in the soil, and the higher the temperature, the more obvious the phenomenon is. The contribution value of the latent heat effect caused by the high temperature has the obvious peak value, and the hysteresis phenomenon exists, and the water vapor migration enhancement factor is more dependent on the soil texture and saturation, but the law of its value is still not clear.

【作者單位】： 上海大學(xué)土木工程系;桂林理工大學(xué)廣西建筑新能源與節(jié)能重點實驗室;廣西大學(xué)土木建筑工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(41502284,51568014) 桂林理工大學(xué)博士科研啟動基金項目(2016254)資助
【分類號】：S152
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本文編號：1893955