The greenhouse environment suitable for crop growth usually depends on reasonable ventilation, and outdoor air flow state and indoor crop height are important factors affecting the ventilation effect. This study conducted simulation and experimental research on corn cultivation in an eight-span plastic greenhouse, analyzing the effects of outdoor wind speed, wind direction, and indoor crop height variations on the uniformity of temperature and relative humidity distribution as well as the air flow dynamics within the greenhouse. The study shows that as outdoor wind speed increases from 0.5 m/s to 2.5 m/s, for every 1 m/s increment, temperatures decrease by 2.2 °C and 0.9 °C, respectively. The increase in outdoor wind speed resulted in uniformity of greenhouse temperature and humidity along the vertical height, but exacerbated the degree of inhomogeneity in the east-west direction. The change in outdoor wind direction leads to differences in airflow direction and ventilation volume. On the south side of the greenhouse, while temperature is lower, the relative humidity is higher, with maximum differences in temperature and humidity between the north and south sides being 0.6 °C and 1.5 %, respectively, when the northeast wind blows. The east wind has the best cooling effect. The uneven degree of temperature and humidity distribution in the east and west direction of the greenhouse is positively correlated with crop height. This study can provide valuable insights for adjusting and optimizing natural ventilation strategies in large multi-span greenhouses.

中文翻译：

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不同风况和玉米高度下八跨温室环境温湿度分布模拟


适合作物生长的温室环境通常依赖于合理的通风，而室外气流状态和室内作物高度是影响通风效果的重要因素。本研究对八跨塑料大棚玉米栽培进行了模拟和实验研究，分析了室外风速、风向和室内作物高度变化对温度和相对湿度分布均匀性以及气流动态的影响。温室内。研究表明，随着室外风速从0.5 m/s增加到2.5 m/s，每增加1 m/s，气温分别下降2.2℃和0.9℃。室外风速的增加导致温室温湿度沿垂直高度的均匀性，但加剧了东西方向的不均匀程度。室外风向的变化导致气流方向和通风量的差异。温室南侧温度较低，相对湿度较高，吹东北风时，南北侧温湿度最大差异分别为0.6℃和1.5%。东风的降温效果最好。温室东西方向温湿度分布的不均匀程度与作物高度呈正相关。这项研究可以为调整和优化大型多跨温室的自然通风策略提供有价值的见解。