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模型和用多孑L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 - e 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.
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