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Position: Home > Articles > CFD Simulation and Improvement of Air-stream Distributive Metering Device Transactions of the Chinese Society for Agricultural Machinery 2009,40 (3) 70-74

气流分配式排种器CFD模拟与改进

作  者:
李中华;王德成;刘贵林;杨明韶;王振华
单  位:
内蒙古农业大学机电工程学院;中国农业机械化科学研究院呼和浩特分院;中国农业大学工学院
关键词:
牧草种子;排种器;气流;计算流体动力学
摘  要:
在建立气流分配式排种器三维模型的基础上,利用CFD方法对排种器的内部流场进行了仿真模拟。选择标准k-ε模型和DPM模型分别对气相和固相进行模拟,得到气流场分布图和颗粒场的运动轨迹图。结果表明,模拟结果与试验结果基本一致。但分配器中存在涡流现象,导致个别种子滞留在分配器中,影响了排种的均匀性。通过改进结构及模拟,消除了分配器中涡流滞种现象。
译  名:
CFD Simulation and Improvement of Air-stream Distributive Metering Device
作  者:
Li Zhonghua1 Wang Decheng1 Liu Guilin2 Yang Mingshao3 Wang Zhenhua2(1.College of Engineering,China Agricultural University,Beijing 100083,China 2.Huhhot Branch of Chinese Academy of Agricultural Mechanization Sciences,Huhhot 010010,China 3.College of Engineering,Inner Mongolia Agricultural University,Huhhot 010010,China)
关键词:
Forage seed,Metering device,Air-stream,Computational fluid dynamics
摘  要:
To improve the uniformity of the forage seed metering,a 3-D model was built to simulate air-stream distributive metering device using computational fluid dynamics(CFD) method,in which the distribution of airflow field and path curve of the particle phase were simulated using standard k-ε model and discrete phase model(DPM),respectively.The results of simulation were in good agreement with experimental data.However,in the simulation,a few seeds were left in the distributor due to the air vortex,which impairs the uniformity of seed sowing.Therefore,CFD simulation was conducted to improve the structure of distributor,and vortex-caused seed detention was finally avoided after the improvement.

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