摘要
采用CFD(computationalfluiddynamics)方法对Venlo型温室夏季采用室外遮阳和屋顶喷淋措施的自然通风降温过程进行了数值模拟。模拟时对整个计算域采用六面体网格进行划分 ,对温室天窗附近区域的网格进行了加密处理 ,生成的网格总数约为 10 6个。温室CFD数值模拟以室内外空气作为研究对象 ,外界气象条件、温室围护结构、室外遮阳与屋顶喷淋、室内植物和土壤等作为数值模拟的边界条件进行处理。对Venlo型温室在室外遮阳和屋顶喷淋措施下室内空气温度的变化以及在整个温室空间的分布进行了数值模拟 ,同时进行了Venlo型温室室内温度的现场试验测试。CFD模拟结果和试验测试结果均表明 :室外遮阳和屋顶喷淋使温室内空气温度得到有效降低。CFD模拟得到的Venlo型温室室内温度平均值与试验测试结果的平均差值为 1 7℃ ,平均偏差为试验测试结果的 5 % ;数值模拟得到的温室室内温度的空间分布变化趋势也与试验测试结果一致。
The cooling process of shading and roof sprinkling were investigated in a naturally ventilated venlo greenhouse with computational fluid dynamics (CFD) method and the governing equations, grid generation and boundary conditions of the CFD method were introduced. Air temperature change and distribution inside the greenhouse with shading and roof sprinkling were both numerically simulated and tested. The average air temperature inside the greenhouse obtained from the CFD simulation is 1.7?℃ higher than that from the measurement, and the simulating result of air temperature distribution inside the greenhouse is also agreed well with the measured ones.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2004年第6期44-48,共5页
Journal of China Agricultural University
基金
高校优秀青年教师教学科研奖励计划资助项目
关键词
温室
自然通风
CFD
数值模拟
greenhouse
natural ventilation
computational fluid dynamics
numerical simulation
