某温室大棚自然通风的CFD模拟分析

为了解温室大棚自然通风下的气流特征及温度流场特点,本文以我国南部地区某温室大棚为例,结合温室内农作物多孔介质模型,建立了该温室大棚的全尺度自然通风CFD模型并对该模型进行了模拟分析与现场实测验证。通过冬季与夏季两种工况对比发现:农作物冠层的阻力以及室内风压是影响温室大棚内气流组织及温湿度的最主要因素。实测结果也与CFD模拟结果接近,表明CFD模拟结果能够较真实有效地反映实际温室内温、湿度情况。

CFD Simulation Analysis of Natural Ventilation in a Greenhouse

In order to understand the characteristics of air flow and temperature flow field under natural ventilation in greenhouse, this paper takes a greenhouse in the south of China as an example, and combines the crop porous medium model in greenhouse, a full-scale natural ventilation CFD model for the greenhouse was established, and the model was simulated and verified by field test. The results show that the resistance of crop canopy and the wind pressure are the most important factors that affect the air distribution, temperature and humidity in greenhouse. The measured results are also close to the CFD simulation results, which shows that the CFD simulation results can effectively reflect the actual temperature and humidity in greenhouses.