【摘要】 以栽有番茄作物的Venlo型两连栋玻璃温室为研究对象,基于计算流体动力学(CFD)技术,运用多孔介质模型、组分传输模型及DO辐射模型对自然通风工况下温室内湿空气的传输过程进行了3D数值模拟,并对模拟结果进行了试验验证.结果表明:温室中部测点气流速度的模拟值与实测值变化趋势相同,总气流速度和y向气流速度的模拟值与实测值平均相对误差分别为15.0%和10.9%,所建立的CFD模型有效.温室南部气流紊流程度高,存在大小不等的涡;北侧流速均匀;温室中部作物区及冠层上方气流流动平缓,作物冠层阻力对室内气流分布模式有影响.靠近侧窗的温室空间以风压通风为主,作物冠层及侧窗上部空间热压作用明显.更多还原

【Abstract】 The 3D numerical simulations were done based on the CFD technique for the natural ventilated Venlo glasshouse with tomato crops.The porous medium model was used for tomato crops,and the humid air transfer was simulated based on the species transfer and the DO radiation model.The measured values were used to validate the CFD model.The results show that the same trend is found for the airflow velo-city for both simulated and the measured values in the middle of glasshouse.The average relative error is 15.0% and 10.9% for the total airflow velocity and the y component,respectively.The CFD model is validated.The airflow is turbulent and the air vortexes are observed near the south volume.However,it is balanced near the north and the crop level.Crop canopy drag affects the airflow patterns.The wind effect plays a role near the side-vent,but the buoyant effect is obvious in the volume above the crop level and the side-vent.更多还原