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Effects of ripple cross angles and turbulence models on wet curtain resistance

查看全文 作　　者：Tao [1]Ding;Lumeng [1,2]Fang;Zhengxiang [1,3]Shi;Baoming [1,3]Li;Yang [1,2]Zhao 高影响力作者 机构地区：[1]College of Water Resources and Civil Engineering,China Agricultural University,Beijing 100083,China;[2]Beijing Engineering Research Center for Safety and Energy-Saving Technology for Water Supply Network Systems,Beijing 100083,China;[3]Key Laboratory of Agricultural Engineering in Structure and Environment,Beijing 100083,China高影响力机构 出　　处：《International Journal of Agricultural and Biological Engineering》索引2019年第12卷第4期,共4页高影响力期刊 基　　金：This study was funded by the China Agricultural Research System(CARS-36);the National key research and development plan special project(2018YFF0213604);the National Natural Science Foundation of China(31402115)。 摘　　要：To study the influence of ripple cross angles on the resistance of wet curtains,wet curtains with different ripple cross angles(45°/45°,45°/15°)were tested on agricultural ventilation equipment performance testing benches,and the static pressure drop under different wind speeds(1-3 m/s)was determined.Four turbulence models(κ-ε,RNGκ-ε,κ-ω,SSTκ-ω)were adopted for numerical simulations of the two types of wet curtain,and the simulations’results were compared with those of experiments.The average errors found are 41.1%,48.7%,27.1%,and 27.8%,respectively,and theκ-ωmodel is found to be the most suitable one for the calculation of wet curtain resistance among the four turbulence models.By using theκ-ωturbulence model,the static pressure drop performances of wet curtains with ripple cross angles 45°/35°and 45°/25°were calculated.Resistance increases with wind speed and ripple cross angles,and a large ripple cross angle has a higher resistance growth rate with increasing wind speed. 关 键 词：wet curtain ripple cross angle RESISTANCE turbulence model ventilation cooling and humidifying system
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