Parameter optimization of fluted-roller meter using discrete element method
作者机构：College of Mechanical and Electric EngineeringNorthwest A&F UniversityYangling 712100ShaanxiChina
出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)
年 卷 期：2018年第11卷第6期
页 面：65-72页
核心收录：
学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学]
基 金：This research was part of a project of Development of Technology and Equipment for Fertilizer Application based on 3S Technology sponsored by the National Research and Development Program(2016YFD0200600 2016YFD0200601)
主 题：discrete element method fertilizer flow evenness fluted-roller meter optimization
摘 要：The most important performance indicator of a fertilizer metering mechanism is the evenness of fertilizer *** this study,a regression mathematical model between the key operating parameters of the fluted roller meter and the flow evenness was developed to simulate a fluted-roller meter for metering diammonium phosphate fertilizer using the discrete element method(DEM).The model was verified by bench test using the same equipment and parameters as the DEM *** working parameters of the fluted-roller meter,including roll length(L),roll rotational speed(n),and flap angle(α)(for fertilizer discharge control),were optimized to maximize the flow *** evenness was assessed by the coefficient of variation(CV)of the discharging mass during the *** simulation and experiment results showed the similar trends,in terms of effects of machine parameters on the *** relative errors ranged from 0.2%to 34.6%with a mean of 10.5%.This demonstrated that the DEM model was feasible to simulate the metering process of the fluted-roller *** machine parameters that significantly affected the values of CV in descending order wereα,L and *** simulation and measurement results revealed that the optimal machine parameters,represented by the minimum value of CV,were observed at L=45 mm,n=55 r/min andα=22.5°.This combination of parameters returned CV values of 10.89%and 9.55%for simulations and measurements,*** study provided useful information for guiding the design and selection of machine parameters for metering devices for fertilizer applications.
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