摘要
为了研究华东型单栋塑料大棚在高温低风速极端天气下的自然通风特征,利用计算流体力学(CFD)理论建立栽培植物的全尺度三维自然通风模型,模型包括了太阳辐射和作物的影响。仿真结果证实:在外界风速较低时,热压通风起主导作用,且增开天窗能提高大棚的通风效果。CFD仿真结果和实验测试点的温度偏差在1.1°C之内,吻合较好,验证了CFD模型的有效性。
A full scale 3D computational fluid dynamics（CFD） model was developed to analyze the ventilation of a planted tunnel greenhouse under the condition of high temperature and low wind speeds.This ventilation model comprises the impacts of solar radiation and plants.The simulation results show that the thermal-driven ventilation plays an major role under low wind speeds.In addition,adding a top window can effectively increase the ventilation capacity of the tunnel greenhouse especially in the region of plants.This CFD model was successfully validated by comparing the numerical results with the experimental data,with a difference less than 1.1°C.
出处
《农机化研究》
北大核心
2011年第8期19-22,共4页
Journal of Agricultural Mechanization Research
基金
上海市科技兴农重点攻关项目(沪农科攻字(2009)第8-1号)
关键词
单栋大棚
CFD
自然通风
热压通风
太阳辐射
greenhouse
CFD
natural ventilation
thermal-driven ventilation
solar radiatio
