农业工程学报2011，Vol.27Issue(11)：236-241,6.DOI:10.3969/j.issn.1002-6819.2011.11.045
塑料大棚气流场模拟及作物蒸腾量计算
Numerical simulation of airflow pattern and calculation of crop transpiration in plastic greenhouse
摘要
Abstract
In order to analyze the airflow pattern and crop evapotranspiration in the plastic greenhouse. Based on computational fluid dynamics simulation, the natural ventilation process in the common plastic greenhouse in East China was performed, and the relationship between the inside ventilation rate and outside wind rate was also established. The aim of the simulation was to investigate the airflow pattern inside the greenhouse and determinate the ventilation parameter related to transpiration. A simple model based on the energy balance model and the turbulent diffusion model had been developed. The model was verified with a non-stress crop with only the inside measured air temperature and outside climate data. The simulated greenhouse crop transpiration was compared with the measurement data and they were found to agree well with each other. Moreover, the correlation determination coefficient between the simulated and measured daily transpiration was 0.776, which of accumulated transpiration was 0.998. While the standard error and the maximum absolute deviation between the simulated and measured accumulated transpiration were 1.16 mm and 4.82 mm. Results show that the equation established need less parameters and the wind parameters inquired were suitable for ordinary greenhouses. This study could meet the needs of crop water management, greenhouse design, and regional water management.关键词
蒸腾量/温室/农作物/计算/模拟/气流场/CFDKey words
transpiration/greenhouse/crops/calculations/simulation/airflow pattern/CFD分类
农业科技引用本文复制引用
孙怀卫,杨金忠,王修贵..塑料大棚气流场模拟及作物蒸腾量计算[J].农业工程学报,2011,27(11):236-241,6.基金项目
国家自然科学基金项目(51079101) （51079101）
国家“863”计划重点项目(2006AA100207) （2006AA100207）
水利部公益性行业科研专项(201001080) （201001080）
