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首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >Numerical simulation of particle motion characteristics in quantitative seed feeding system
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Numerical simulation of particle motion characteristics in quantitative seed feeding system

机译：定量种子馈送系统中粒子运动特性的数值模拟

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摘要

High-speed precision seed metering device is the key to achieve efficient and precise seed planting in agricultural industry. In this work, a novel quantitative seed feeding system containing a feeding device and a venturi feeding tube is investigated using the coupled CFD and DEM approach. The flow behavior of seed particles and airflow field in this system are analyzed in detail, and the effects of different variables related to venturi tube and operations are examined. The results show that as the nozzle convergence angle increases, the pressure at the nozzle gradually decreases and the pressure gradient extends. As a result, particle movement mobility is enhanced and particle accumulation is reduced. With the increase of the feeding angle, seed particles tend to deposit and collide with the bottom wall. The results also show that when wind pressure reaches above 10 kPa, the spacing between two adjacent seed particles is more consistent, and seed particles are more uniformly discharged from the venturi tube. The results demonstrate that for a better design of the quantitative seed feeding system, the proper nozzle convergence angle is roughly at 70 degrees, and the feeding angle is at around 45 degrees (C) 2020 Elsevier B.V. All rights reserved.
机译：高速精密种子计量装置是在农业产业中实现高效和精确种子种植的关键。在这项工作中，使用耦合的CFD和DEM方法研究含有馈电装置和文丘里喂料管的新型定量种子馈送系统。详细分析了该系统中的种子颗粒和气流场的流动行为，并检查了与文丘里管和操作相关的不同变量的影响。结果表明，随着喷嘴收敛角增加，喷嘴处的压力逐渐减小，并且压力梯度延伸。结果，提高了颗粒运动迁移率，并且减少了颗粒累积。随着进料角度的增加，种子颗粒倾向于沉积并与底壁碰撞。结果还表明，当风压达到10kPa以上时，两个相邻种子颗粒之间的间隔更加一致，并且种子颗粒从文丘里管更均匀地排出。结果表明，为了更好地设计定量种子进料系统，适当的喷嘴会聚角度大致为70度，饲料角度约为45度（c）2020 elestvier b.v.保留所有权利。

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