玻璃温室自然通风热环境时空分布数值模拟

Numerical Simulation of Thermal Profiles in Spatial and Temporal Field for Natural Ventilated Glasshouse

温室内温度的时空分布及变化与外界气候环境之间有较强的耦合性。以Venlo型两连栋空玻璃温室为研究对象，基于计算流体动力学（CFD）技术，应用离散坐标（D0）辐射模型对温室内温度时空分布及变化进行了3-D稳态数值模拟与试验验证。结果表明：白天各时刻空温室内平均温度的模拟值与实测值吻合良好。最大相对误差为11．3％，平均相对误差为7．6％；温室内温度的空间分布梯度明显，作物区温度分布比较均匀，约在28．5～28．8℃左右。DO辐射模型模拟太阳辐射对玻璃温室内热环境的影响是可行的。

The temperature profiles in spatial and temporal field inside the glasshouse are coupled to outside climates. Especially, the discrete ordinate （DO） radiation model was applied to solve the temperature profiles inside the glasshouse. The 3-D numerical simulation was done based on the CFD technique for the natural ventilated Venlo glasshouse, and the measurement was conducted to validate the CFD model. The results showed that the simulation values agreed well with test values about the average temperature in the empty glasshouse for the different time, the max relative error and the average error was 11.3% and 7.6%, respectively. The spacial temperature grades were obvious inside the glasshouse. A homogeneous temperature field was obtained at crop level, the average temperature was about 28.5- 28.8℃. The DO radiation model was proved effective in modeling the effect of solar radiation on the thermal climates inside the glasshouse.