农业机械学报2026，Vol.57Issue(6)：104-118,15.DOI:10.6041/j.issn.1000-1298.2026.06.010
基于CFD-DEM耦合的气力式导种装置中种子运动与受力研究
Seed Motion and Force Characteristics in Pneumatic Seed Delivery Device Based on CFD-DEM Coupling
摘要
Abstract
Aiming to enhance the seeding accuracy and uniformity of pneumatic maize planters under high-speed operating conditions,and reduce seed collision and deviation during the seed delivery process,a CFD-DEM coupled simulation model was developed based on aerodynamic principles to describe the airflow-induced motion of seed particles within the seed delivery tube.The motion response and force characteristics of seeds under airflow action were systematically analyzed.Considering a representative seed delivery structure,the effects of airflow velocity,structural parameters,and buffer zone dimensions on the horizontal velocity of seeds at the outlet were investigated.On this basis,the Box-Behnken design(BBD)method was employed to establish a response surface model for screening and optimizing key structural parameters influencing delivery performance.Simulation results indicated that a properly designed delivery structure can significantly reduce the frequency of particle-wall collisions and fluctuations in outlet horizontal velocity,effectively achieving"zero-velocity seed release".Further bench tests of the seed delivery system showed good agreement between the simulation and experimental results,with a maximum error of less than 8％,demonstrating the high predictive accuracy of the proposed CFD-DEM model.The research findings can provide a solid theoretical foundation and valuable engineering reference for the structural optimization of seed delivery systems and the development of precise seed release control strategies in high-speed pneumatic planting devices.关键词
CFD-DEM/气流输送/空气动力学/导种结构/响应面试验Key words
CFD-DEM/airflow conveying/aerodynamics/seed-guiding structure/response surface methodology分类
农业科技引用本文复制引用
李鸿盛,杨丽,张东兴,崔涛,和贤桃,李治民..基于CFD-DEM耦合的气力式导种装置中种子运动与受力研究[J].农业机械学报,2026,57(6):104-118,15.基金项目
国家重点研发计划项目(2021YFD2000404)和国家现代玉米产业技术体系项目(CARS-02) （2021YFD2000404）
