垂直通风猪舍气流及温度场的CFD仿真优化  

CFD simulation optimization of airflow and temperature field in vertically ventilated pig house

作　　者：付鹏[1] 罗松 杨卫平[1] 刘仁鑫[1] 王成伟 FU Peng;LUO Song;YANG Weiping;LIU Renxin;WANG Chengwei(School of Engineering,Jiangxi Agricultural University,Nanchang 330045,China)

机构地区：[1]江西农业大学工学院,南昌330045

出　　处：《黑龙江畜牧兽医》2020年第18期34-38,160,161,共7页Heilongjiang Animal Science And veterinary Medicine

基　　金：国家自然科学基金项目(31960683);江西省教育厅科技计划项目(GJJ180190)。

摘　　要：为了在高温、高湿的南方地区建设良好饲养环境的现代化猪舍,试验以某垂直通风猪舍的气流及温度场为研究对象,对猪舍48个测试点取得气流速度和空气温度数据,并用红外热像仪测量猪只表面、猪舍四周墙面、屋顶的温度,用通风多参数测量仪测量地道通风入口的风速,然后建立猪舍仿真模型,与计算流体力学(computational fluid dynamics,CFD)仿真结果对比,在确定模型真实可靠的基础上,开展通风立柱为45°、60°、75°、90°倾斜角度下的猪舍环境仿真研究。结果表明:当通风立柱的倾斜角度为45°时,流入猪舍的新鲜空气方向发生改变,相对垂直立柱通风的方式猪只活动区域平均风速增加了41.5%,风速分布的不均匀系数降低了29.9%,平均温度降低了8.4%,温度分布的不均匀系数降低了45.9%。说明当通风立柱的倾斜角度为45°时,猪舍内气流速度和温度场的分布更加合理,猪舍通风效果得到较大改善,利于猪只生长。In order to build a modern pig house with a good breeding environment in the southern region of the high-temperature and high-humidity environment, this article takes the airflow and temperature fields of vertically ventilated pig house as the research object,forty-eight test sites were installed in pig houses to obtain air velocity and air temperature data, the temperature of the surface of the pig, the wall around the pigsty and the roof were measured by the infrared thermal imager, and the wind speed of the tunnel ventilation entrance was measured by the multi-parameter ventilation meter. Then, the simulation model of piggery was built and compared with the computational fluid dynamics(CFD) simulation results. Based on the reliability of the model,the simulation study of pig house environment with different tilting angles of the ventilation columns(45°,60°,75°, and 90°) was carried out. The results showed that when inclination angle of the ventilation column was 45°,the direction of the fresh air flowing into the pig house was changed.Compared with the vertical column,the average wind speed in the pig’s active area increased by 41.5%, and the inhomogeneity coefficient of the wind speed distribution decreased by 29.9%.The average temperature decreased by 8.4%, and the inhomogeneity coefficient of the temperature distribution reduced by 45.9%. The research results indicated that inclination angle of the ventilation column was 45°,the airflow velocityandthe distribution of temperature field in the pig house was more reasonable,and the ventilation effect of pig house is greatly improved, which is conducive to the growth of pigs.

关 键 词：猪舍 垂直通风 气流场 温度场 仿真优化 不均匀系数 

分 类 号：S817.3[农业科学—畜牧学]