基于CFD的喷播机搅拌影响因素研究及试验验证  

Research and Experimental Verification of MixingFactors of Sprayer Based on CFD

作　　者：李鹏鹏 王泽河[1] 弋景刚[1] 黄海明 Li Pengpeng;Wang Zehe;Yi Jinggang;Huang Haiming(Mechanic and Electronics College,Agricultural University of Hebei,Baoding 071000,China;Hebei Senlike Technology Co.,Ltd.,Baoding 071000,China)

机构地区：[1]河北农业大学机电工程学院,河北保定071000 [2]河北森力克科技有限公司,河北保定071000

出　　处：《农机化研究》2025年第7期44-51,共8页Journal of Agricultural Mechanization Research

基　　金：河北省重点研发项目(21327214D)。

摘　　要：针对喷播机因搅拌不均导致农作物种子成活率低的问题,研究了喷播机内的泥浆搅拌流场分布对解决农作物成活率低的指导作用,并可为喷播机中搅拌装置优化设计提供理论依据。搅拌均匀性是衡量喷播机质量的一个重要指标,针对卧式双轴搅拌器的搅拌均匀性问题,采用固液两相流混合模型的数值模拟方法,运用Fluent软件研究搅拌转速、固相颗粒粒径和搅拌桨叶片安装角对搅拌仓内流场特性的影响,得出最优参数。数值模拟结果表明:当搅拌转速为100 r/min、固相颗粒粒径为0.1 mm、搅拌桨叶片安装角为45°时,搅拌效果较好。经试验验证,试验结果与仿真结果相比最大差值不大于4%,喷播作业后,植物覆盖均匀,覆盖率为88.7%。Aiming at the problem of low survival rate of crop seeds caused by uneven mixing,the study on the distribution of mud mixing flow field in the spray planter has a guiding role in solving the low survival rate of crops,and can provide a theoretical basis for the optimal design of the mixing device in the spray planter.Stirring uniformity is an important index to measure the quality of a jet-seeding machine.Aiming at the stirring uniformity problem of a horizontal two-axis agitator,adopted the numerical simulation method of solid-liquid two-phase flow mixing model,and used Fluent software to study the effects of different stirring speeds,solid particle sizes and impeller installation angles on the flow field characteristics in the mixing chamber,and obtained the optimal parameters.The numerical simulation results showed that the stirring speed was 100 r/min,the particle size was 0.1 mm,and the impeller installation angle was 45°,and the stirring effect was good.The test results were compared with the simulation results,the maximum difference was less than 4%.After spraying,the plant coverage was uniform,and the coverage rate was 88.7%.

关 键 词：喷播机 卧轴搅拌 固液两相流 数值模拟 流场特性 

分 类 号：S223.12[农业科学—农业机械化工程]