日光温室内浅层土壤温湿度场的数值模拟  

Numerical Simulation on the Temperature and Moisture Fields of Shallow Soil in Solar Greenhouse

作　　者：张艳 杜震宇[1] ZHANG Yan;DU Zhenyu(College of Environmental Science and Engineering,Taiyuan University of Technology, Taiyuan 030024, China)

机构地区：[1]太原理工大学环境科学与工程学院

出　　处：《太原理工大学学报》2020年第2期284-290,共7页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(51476108)

摘　　要：为研究日光温室内浅层土壤温湿度场的变化规律,建立了浅层土壤温湿度场的三维非稳态数值模型,模拟日光温室内浅层土壤温湿度的动态分布。结果表明:不同深度的土壤温湿度变化趋势一致,都随时间呈现周期性的变化,随着土壤深度的增加,温度波的振幅逐渐减小,含水率的变化幅度也逐渐减小,延迟时间逐渐增大;50 cm深度土壤层温湿度基本保持恒定;土壤的初始体积含水率与土壤层温度梯度成反比;根据不同深度浅层土壤温度梯度的变化规律,0~100 cm的土层可分为三个特征层:多变层,缓变层,均稳层。To investigate the temperature and moisture fields of shallow soil in solar greenhouse, a mathmatical model was built up and used to simulate the dynamic temperature and moisture of shallow soil in solar greenhouse. The results show that the soil temperature and moisture changes at different depths had the same trend, showing periodic changes with time;with the increase of soil depth, the amplitude of temperature and moisture wave decreases gradually, and the delay degree increased gradually;50 cm-deep soil layer temperature and moisture remained constant;the initial volumetric moisture content of the soil was inversely proportional to the soil layer temperature gradient;according to the variation of temperature and moisture gradient of shallow soil in different depths,the soil layer of 0 ~100 cm was divided into three characteristic layers: variable layer, slow change layer and uniform stability layer.

关 键 词：日光温室 土壤温度场 土壤湿度场 浅层土壤 

分 类 号：TU832.55[建筑科学—供热、供燃气、通风及空调工程]