基于EDEM-Fluent的气动式鱼塘投饲机性能优化  

Performance Analysis and Optimization of Pneumatic Fishpond Feeder Based on EDEM-Fluent Coupling

作　　者：赵思琪[1] 丁为民[1,2] 赵三琴 顾家冰[1,2] 张建凯 ZHAO Siqi;DING Weimin;ZHAO Sanqin;GU Jiabing;ZHANG Jiankai(College of Engineering, Nanjing Agricultural University, Nanjing 210031, China;Key Laboratory for Intelligent Agricultural Equipment in Jiangsu Province, Nanjing210031, China)

机构地区：[1]南京农业大学工学院,南京210031 [2]江苏省智能化农业装备重点实验室,南京210031

出　　处：《农业机械学报》2019年第9期130-139,共10页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金项目(31401778);江苏省农机三新工程项目(NJ2013-12)

摘　　要：为提高气动式鱼塘投饲机抛料均匀性,提高饲料利用率,利用EDEMFluent耦合方法对投饲机抛料过程进行性能分析和数值模拟,研究造成抛料分布不均匀的主要原因,并对投饲机结构进行优化改进。在此基础上设计三元二次回归正交旋转组合试验,研究设计参数外腔体半径Ro、外腔体高度ho、导流板圆心角α等对抛料均匀性的影响,建立饲料颗粒周向分布变异系数Cv与因素Ro、ho、α之间的二次多元回归模型并解析,确定最优设计参数组合并进行场地验证试验。结果表明,各因素对周向分布变异系数的影响程度由大到小为:导流板圆心角α、外腔体半径Ro、外腔体高度ho,当Ro取77.00mm、ho为85.40mm、α为93.20°时Cv最小,其理论结果为14.13%,验证试验结果为15.08%,与模型理论值相吻合,与未优化前相比Cv降低50.50个百分点。表明基于EDEMFluent耦合方法进行气动式投饲机抛料性能参数优化改进是可行的。In order to improve the uniformity of the pneumatic fish pond feeder and the feed utilization rate, the performance analysis and numerical simulation of the throwing process by EDEM Fluent coupling method were carried out. The main reasons for the uneven distribution of throwing were studied, and the structure of feeder was optimized. The simulation analysis showed that the structure of feed chamber and guide plate were the key factors affecting the throwing performance. On the basis of optimization of parabolic structure, the three-dimensional two regression orthogonal rotation test was designed by Design-Expert software. The effects of the factors such as the radius ( R o ) of the external cavity, the height ( h o ) and the angle (α) on the uniformity of the parabolic were studied. Then, the multivariate regression model between the variation coefficient of circumferential distribution ( C v ) and the factors of R o, h o and α was established. And then, the optimal design parameters were determined and the site verification test was carried out in Agricultural Machinery Test Site of Nanjing Agricultural University. The results showed that the influence of each factor on the circumferential variation coefficient in primary and secondary order was as follows:α, R o, and h o . The circumferential uniformity coefficient of variation was the smallest (14.13%) when R o was 77.00 mm, h o was 85.40 mm, and α was 93.20°. Meanwhile, the test result was15.08%, which was consistent with the theoretical value of the model, and it was decreased by 50.50 percentage points compared with the prior optimization. Therefore, it was feasible to optimize the performance parameters of the pneumatic feeder based on the EDEM Fluent coupling method, and get better parabolic uniformity. The research result provided a reference for the design of a good feeding equipment and similar parabolic performance analysis.

关 键 词：鱼塘 气动式投饲机 抛料均匀性 EDEM FLUENT 周向分布变异系数 

分 类 号：S964.3[农业科学—水产养殖]