油麦兼用型气送式集排器增压管气固两相流仿真与参数优化

被引：39

作者：

雷小龙 ^{[1
,2
]}

廖宜涛 ^{[1
]}

王磊 ^{[1
]}

王都 ^{[1
]}

姚露 ^{[1
]}

廖庆喜 ^{[1
]}

机构：

[1] 华中农业大学工学院

[2] 四川农业大学机电学院

来源：

农业工程学报 | 2017年 / 33卷 / 19期

关键词：

农业机械; 计算机仿真; 农作物; 气送式集排器; 增压管; 气固两相流; 分配均匀性;

D O I：

暂无

中图分类号：

S223.2 [播种机];

学科分类号：

082801 [农业机械化工程];

摘要：

为明确增压管结构对油麦兼用型气送式集排器分配均匀性的影响,该文运用DEM-CFD气固耦合方法仿真分析了波纹间距、凹窝深度和增压管长度对种子运动特性、分配均匀性和增压管气流场的影响,台架试验研究了增压管长度和气流压强对分配均匀性的影响。结果表明:增设增压管明显提高种子分布均匀度系数,降低种子速度和分配均匀性变异系数。速度流场分析表明增压管波峰与波谷的气流速度和压强交替变化,增压管中种子速度与受力呈现"正弦形"变化趋势。凹窝深度、波纹间距和增压管长度分别为4.2、15和180 mm时,种子分布均匀度系数和分配均匀性变异系数分别为91.17%和4.91%。台架试验表明,在优化结构参数组合下,排种油菜和小麦的气流压强分别为1 200和1 600 Pa时,分配均匀性变异系数分别达2.84%和2.89%。该研究为分析增压管中种子运动特性和优化其结构参数提供了参考。

引用

页码：67 / 75

页数：9

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