山东农业大学学报（自然科学版）2025，Vol.56Issue(6)：967-973,7.DOI:10.3969/j.issn.1000-2324.2025.06.007
M型大棚通风性能模型试验与仿真分析
Model Test and Simulation Analysis of Ventilation Performance in M-shaped Greenhouses
摘要
Abstract
With the development of modern facility agriculture,large-span arched greenhouses have been widely used due to their efficient space utilization.However,conventional large-span arched greenhouses often exhibit obvious turbulence,which affects the ventilation and cooling efficiency,and causes adverse effects on the growing environment of crops.Therefore,this study designs a new wind-resistant and cooling agricultural greenhouse—M-shaped greenhouse,and conducts experimental research and analysis on its ventilation performance.This study employs using a self-developed portable DC wind tunnel device to perform wind tunnel model tests.Based on the actual dimensions of the M-shaped greenhouse,a 1∶100 rigid test model is fabricated using 5 mm thick transparent polymethyl methacrylate as the model material.By densely planting 0.1 mm diameter soft cotton threads on the internal observation surface,this study visually observes the airflow field distribution inside the M-shaped greenhouse under both closed and open roof vents conditions.On this basis,this study establishes a computational fluid dynamics(CFD)model for greenhouse internal ventilation,and verifies the rationality of the model through grid independence analysis.Combining with the wind tunnel test results,this study verifies the reliability of the CFD model and conducts a comparison and selection of turbulence models.The results show that when only the lateral vents open,the airflow forms a main outflow path at the bottom of the M-shaped greenhouse,and generates a low speed vortex in the upper part.In contrast,when both top and lateral vents open at the same time,the pressure gradient drives the airflow to efficiently discharge through the top vents.Under a test wind speed of 5 m/s,the wind speed at the height of 1.0 m above the ground inside the greenhouse increases by 18%.Through comparison and selection,the RNG k-ε model is determined to accurately characterize the airflow distribution in the greenhouse,making it the optimal turbulence model.This study not only provides methods and a basis for the flow field observation and characterization of M-shaped greenhouses,but also offers references for the research on the ventilation performance of other similar agricultural greenhouses.关键词
通风性能/M型大棚/风洞试验/CFD/湍流模型Key words
Ventilation performance/M-shaped greenhouse/wind tunnel experiment/CFD/turbulence model分类
农业科技引用本文复制引用
宋皓然,齐子皓,张鹏飞,王少杰..M型大棚通风性能模型试验与仿真分析[J].山东农业大学学报（自然科学版）,2025,56(6):967-973,7.基金项目
国家自然科学基金(32272008) （32272008）
国家重点研发计划(2023YFD1700904) （2023YFD1700904）
宁夏回族自治区重点研发计划项目(2023BCF01042) （2023BCF01042）
