基于响应面法和CFD的轴流气吸式排种器优化设计  

Optimization design of axial⁃flow suction seeder based on response surface methodology and CFD

作　　者：张宇乾 于淇 胡志诚 陈龙 杨文彩 张海东 Zhang Yuqian;Yu Qi;Hu Zhicheng;Chen Long;Yang Wencai;Zhang Haidong(College of Mechanical and Electrical Engineering,Yunnan Agricultural University,Kunming,650201,China)

机构地区：[1]云南农业大学机电工程学院,昆明市650201

出　　处：《中国农机化学报》2024年第8期14-19,共6页Journal of Chinese Agricultural Mechanization

基　　金：云南省重大科技专项计划(2018ZC001—4—3)。

摘　　要：为提高轴流气吸式排种器型孔入口处的负压从而提升吸种效率,采用响应面法和CFD软件对排种器结构参数进行试验设计和数值模拟并进行回归分析,得到排种器结构最佳参数组合。使用中央复合设计(CCD)对排种器结构参数进行试验设计并建立15组试验模型,使用FLUENT软件对试验模型的型孔入口压力值进行数值计算,将所得数据集导入Design-Expert软件并通过响应面法进行预测和寻优,得到的最佳参数组合为:扇叶转速为2393 r/min,扇叶个数为11,型孔数为15,此时目标函数预测型孔进口处的负压为210.07 Pa。为验证响应面法目标函数预测值的准确性,进行数值模拟试验和台架试验。结果表明,数值模拟法和响应面法的目标函数值基本一致,而台架法与数值模拟法的误差为6.2%。In order to improve the negative pressure at the inlet of the axial flow air suction seeder and thus improve the efficiency of seed suction,the response surface method and CFD software were employed to carry out the experimental design,numerical simulation of the structural parameters of the seeder and regression analysis,to obtain the perfect combination of parameters of the seeder structure.In this paper,the central composite design(CCD)was implemented to design the experiments on the structural parameters of the seeder and to establish 15 sets of experimental models,the numerical calculations were carried out on the inlet pressure values of the type⁃holes of the experimental models by using the FLUENT software,and the resulting data set was imported into the Design-Expert software and predicted and optimized by the response surface method,and the optimal parameter combinations obtained were as follows:the fan speed was 2393 r/min,the number of fan blades was 11,and the number of type⁃holes was 15,at which time,the negative pressure at the inlet of the type⁃holes was 210.07 Pa predicted by the objective function.In order to verify the accuracy of the predicted value of the objective function of the response surface method,numerical simulation tests and bench tests are carried out.The results show that the objective function values of numerical simulation method and response surface method are basically the same,while the error between the bench method and numerical simulation method is 6.2%.

关 键 词：轴流气吸式 排种器 响应面法 计算流体动力学 数值模拟 

分 类 号：S223.2[农业科学—农业机械化工程]