湖南农业大学学报（自然科学版）2025，Vol.51Issue(2)：97-102,6.
水稻秸秆在割台螺旋搅龙输送下的流动特性分析
Analysis of the flow characteristics of rice straw transported by spiral churn on cutting tables
摘要
Abstract
To address the difficulty in revealing the abrasion mechanisms due to the unknown flow pattern of the rice straw transported by the spiral churn of the cutting table,this study investigated the conveying process of rice straw by the combine harvester header auger during harvesting.The behavior of rice straw contact units was analyzed,and a mathematical model of flow velocity was established to plot the trajectory of the straw's centroid.Discrete element method simulations were employed to model the conveying process,obtaining the centroid trajectory.The wear profile of the header was measured and compared with the theoretical and simulated straw trajectories.The results showed that when the friction coefficient decreased from 0.3 to 0.1,the axial velocity of rice straw driven by the outer edge of the spiral blades increased from 1 058.83 mm/s to 1 123.59 mm/s,while the circumferential velocity decreased from 670.59 mm/s to 439.40 mm/s.The simulated straw trajectory closely matches the theoretical model,with a mean square error of 0.386 7-6.188 3.However,the wear profile aligned well with the theoretical trajectory only when the axial displacement of rice straw and spiral blade contact ranged from 0 to 64 mm,with an overall MSE of 29.637 6.关键词
水稻秸秆/螺旋搅龙/流动特性/运动轨迹/离散元仿真Key words
rice straw/spiral churn/flow characteristics/trajectory/discrete element simulation分类
农业科技引用本文复制引用
张彪,王邦追,王国强,荆天天,唐忠,吴美玲,李亚健..水稻秸秆在割台螺旋搅龙输送下的流动特性分析[J].湖南农业大学学报（自然科学版）,2025,51(2):97-102,6.基金项目
泰州市科技支撑计划(农业)项目(TN202219) （农业）
2022年度国家农业可持续发展试验示范区建设市级财政专项资金项目(ZK20230001) （ZK20230001）
