基于多孔介质的玻璃温室加热环境数值模拟  

Numerical Simulation on Thermal Environment of Heated Glass Greenhouse Based on Porous Medium

作　　者：吴飞青[1] 胥芳[2] 张立彬[2] 马修水[1] 

机构地区：[1]浙江大学宁波理工学院信息科学与工程分院,宁波315100 [2]浙江工业大学机械制造及自动化省部共建教育部重点实验室,杭州310032

出　　处：《农业机械学报》2011年第2期180-185,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：科技部重大基础研究前期研究专项(2005CCA04600);浙江省科技厅重大专项(20060374);浙江省重中之重实验室开放基金资助项目(JDKF006);宁波市自然科学基金资助项目(2010A610080)

摘　　要：利用CFD方法对冬季夜间加热温室热环境进行建模,模型中考虑热压、热辐射和作物的影响,作物用多孔介质替代,采用标准k-ε湍流模型和SIMPLE算法的有限体积法对流场微分方程进行离散,对室内流场和温度变化以及分布进行了数值模拟。通过在Venlo型温室采集关键位置的温度和速度数据,与仿真结果比较发现,测试点的温度误差均控制在2℃之内,少数相对误差控制在15%之内,大多数控制在10%之内,验证了所建CFD模型和用多孔介质替代作物的正确性。The thermal environment was modeled for a Venlo-type heated greenhouse at night in winter,in which the standard k-ε turbulent model,thermal pressure,thermal radiation and porous medium model instead of the crop were included.The effects of hot wind on airflow,temperature patterns and distribution were numerically investigated using commercial computational fluid dynamics（CFD） codes.The numerical solution was made by applying a finite volume discretization with the SIMPLE algorithm.Compared with the simulation results,numerical model was validated with experimental data collected in a Venlo-type greenhouse.The temperature error was controlled in 2℃ at all test points,and the relative error was mainly controlled in 10% except a few controlled in 15%.The results indicated that the CFD model based on porous medium could be effective.

关 键 词：玻璃温室 热环境 多孔介质 热风采暖 计算流体动力学 数值模拟 

分 类 号：S625.51[农业科学—园艺学] TP391.9[自动化与计算机技术—计算机应用技术]