排灌机械工程学报
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排灌机械工程学报  2014, Vol. 32 Issue (1): 66-71    DOI: 10.3969/j.issn.1674-8530.12.0110
农业水土工程 最新目录 | 下期目录 | 过刊浏览 | 高级检索 Previous Articles  |  Next Articles  
施肥泵活塞关键结构参数对性能影响的数值模拟
王新坤, 夏立平, 高世凯, 许鹏
江苏大学流体机械工程技术研究中心, 江苏 镇江 212013
Numerical simulation of effects of piston key structural parameters on performance of jet fertilizer pump
Wang Xinkun, Xia Liping, Gao Shikai, Xu Peng
Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China
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摘要 针对现有的活塞式施肥泵存在的性能不高等问题,设计出一种新型射流施肥泵.利用Pro/E软件完成射流施肥泵的造型,运用Fluent软件进行数值模拟.以活塞关键结构参数和射流泵入口压力为因素,以活塞平均运动速度和切换频率为试验指标,对射流施肥泵进行了四因素四水平正交试验设计,得到活塞的平均运动速度和切换频率,通过活塞注肥进程典型时刻的速度云图分析了内部流场分布与活塞动态过程.并应用极差与方差分析法对活塞平均运动速度和切换频率的主要影响因素进行了分析.结果表明:入口压力和活塞冲程对活塞平均运动速度和切换频率的影响均具有统计学意义.利用多元回归方法拟合出活塞平均运动速度、切换频率与结构参数的关系式,关系式具有较高的线性相关性.建立了活塞平均运动速度和切换频率与活塞关键结构参数之间的回归模型,可为射流施肥泵结构设计与量化分析提供参考.
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王新坤
夏立平
高世凯
许鹏
关键词施肥泵   活塞   正交试验   数值模拟   多元回归方法     
Abstract: According to the problems in the existing jet fertilizer pumps, a new type of the pump was proposed and its 3D solid model was generated in Pro/E software, the flow in it was simulated by using CFD software-Fluent. An orthogonal experimental design with 4 factors each at 4 levels was applied in the new fertilizer pump, the 4 factors include 3 key structural parameters of the piston and driving pressure for the pump, and the observed performance indexes are the averaged piston moving velocity and switching frequency. The internal flow field and piston moving process were analyzed by means of velocity contours at a series of typical instances during the discharging period of the piston. The effects of those parameters on the two observed indexes were evaluated by using the range analysis and variance analysis. The results show that the driving pressure and piston stroke can significantly affect the averaged piston moving velocity and switching frequency. The averaged piston moving velocity and switching frequency have been correlated to those four parameters with a stronger linear dependence by using the multivariable method. These linear multivariable regression models can provide a theoretical basis for the structural design and quantitative analysis in the design of jet fertilization pumps.
Key wordsfertilizer pump   piston   orthogonal experiment   numerical simulation   multivariable method   
收稿日期: 2012-10-05;
基金资助:

国家863计划项目(2011AA100506);农业科技成果转化资金资助项目(2011GB2C100015)

通讯作者: 王新坤(1966—),男,陕西临潼人,研究员,博士生导师(xjwxk@126.com),主要从事节水灌溉理论技术研究.   
作者简介: 夏立平(1985—),男,湖南衡阳人,硕士(yzxxlp@163.com),主要从事节水灌溉理论技术研究.
引用本文:   
王新坤,夏立平,高世凯等. 施肥泵活塞关键结构参数对性能影响的数值模拟[J]. 排灌机械工程学报, 2014, 32(1): 66-71.
WANG Xin-Kun,XIA Li-Ping,GAO Shi-Kai et al. Numerical simulation of effects of piston key structural parameters on performance of jet fertilizer pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(1): 66-71.
 
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