吸盘式水稻育秧播种器吸孔气流场仿真分析  

Airflow field simulation on suction nozzle of cupule-type disseminatorfor rice seedling

作　　者：张敏[1] 吴崇友[1] 张文毅[1] 

机构地区：[1]农业部南京农业机械化研究所,南京210014

出　　处：《农业工程学报》2011年第7期162-167,I0002,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家科技支撑计划(2006BAD28B00-2);2010年科技部农业科技成果转化资金资助

摘　　要：为分析吸盘式水稻育秧播种器工况参数和吸孔结构参数对种子吸附性能和吸孔堵塞的影响,运用ANSYS12.0/Fluent软件对3种形式的吸孔在不同边界条件下的气流场进行仿真分析。数值模拟正交试验和单因素试验分析表明吸孔导程对吸孔吸种空穴率和重吸率的影响较小,但减少吸孔导程有利于减少吸孔堵塞;吸种孔最大吸种距离在2mm左右;仿真结果与室内试验结果吻合。该研究对吸盘式水稻育秧播种器吸种孔优化设计和工作参数选择有参考价值。In order to analyze the influence of operating mode parameters of cupule-type disseminator and structural parameters of suction nozzle on adsorption properties and blocking of the suction nozzle for rice seedling,ANSYS 12.0 /Fluent were used for making simulated analysis of the airflow field of 3-types nozzle on different boundary conditions.The results of numerical simulation orthogonal test and single factor test indicated that suction nozzle lead had little effect on rate of voiding and rate of repeating suction,but it was helpful for reducing suction nozzle blocking to reduce suction nozzle lead.The maximum suction distance of suction nozzle was about 2 mm,the simulation conclusions consisted with the laboratory tests.The study can provide references for optimization design of suction nozzle and work parameters selection in cupule-type disseminator for rice seedling.

关 键 词：播种 流场 模拟 吸盘式 吸孔 吸种性能 CFD 

分 类 号：S223.2[农业科学—农业机械化工程]