Mechanism Analysis and Practical Teaching Design of a Dual-Stage Cleaning System in a Flax Combine Harvester Based on CFD–DEM Coupled Simulation
DOI:
https://doi.org/10.48162/rev.57.1.13Keywords:
combine harvester, computer simulation, higher education , practical teachingAbstract
This study focuses on the flax combine harvester designed for operation in hilly and mountainous regions and employs a CFD–DEM coupled simulation framework to model and analyze the operational dynamics of its dual-stage cleaning system. The primary objective of the study is to investigate, through simulation, the dynamic behaviors of various materials during the flax harvesting process and the working principles of the cleaning system. By combining Computational Fluid Dynamics (CFD) and the Discrete Element Method (DEM), the motion trajectories and distribution of flax seeds, straw fragments, husks, and light impurities within the dual-stage cleaning system are simulated. The results show that the dual-stage cleaning system effectively separates different materials, with the preliminary cleaning system exhibiting high efficiency in discharging light impurities and straw fragments, while the fine cleaning system, aided by the centrifugal fan, further improves the purity of the flax seeds. This study not only provides theoretical guidance for the design optimization of flax harvesters but also promotes the innovative development of agricultural mechanization education through simulation-based teaching modules. By engaging in this simulation-driven pedagogy, students gain practical experience in 3D modeling, mesh generation, flow field simulation, and DEM analysis, thus enhancing their ability to address complex engineering problems. The findings of this research are significant for advancing mechanized harvesting technologies in hilly terrains and contributing to talent development for smart agriculture and regional economic growth.
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