Numerical Simulation of Material Movement in Discharging Device Based on Gas-solid Coupling Method

被引：0
|
作者：
Zhang F. [1 ]
Song X. [1 ]
Zhang X. [1 ]
Zhang F. [1 ]
Dai F. [1 ]
Sun B. [1 ]
机构：
[1] College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou
来源：
Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering | 2019年 / 27卷 / 06期
关键词：
Coupling; Discharging; Material movement; Numerical simulation; Two-phase flow;
D O I：
10.16058/j.issn.1005-0930.2019.06.020
中图分类号：
学科分类号：
摘要：
To study the interaction between air and material in discharging device of 9FH-40 kneading machine at different rotation speeds, the interaction between air and material at different rotation speed (under the rated speed) was simulated with the gas-solid coupling method (Computational Fluid Dynamics & Discrete Element Method). The results shows that the turbulence intensity is highest in the fan rotation zone, and the material can be accelerated to 10m/s after entering this area. The air velocity and coupling force increased with the increasing of rotation speed in the fan rotation zone. Meanwhile, the volatility of air velocity and coupling force is strengthened. The air velocity reaches to 40m/s at the edge of the fan in the radial direction. The rotation speed of the fan has small effect to the coupling force at inlet zone, the coupling force maintains at 2.5×10-4N basically. The fluctuation of coupling force is greatly affected by fan rotation speed at outlet zone, and the distribution of coupling force in the same range under different rotation speeds. The corresponding suggestions aiming at the analysis results are proposed for improving the structure of the discharging device. © 2019, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.
引用
收藏
页码：1411 / 1419
页数：8
相关论文
共 17 条
  • [1] Cheng Y., Lei X., Xu T., Et al., Changes of pH and microorganism during the fermentation of microbial and traditional silages with corn straw knead wire, Journal of Northwest A& F University: Natural Science Edition, 42, 5, pp. 17-21, (2014)
  • [2] Cong H., Wang K., Li R., Et al., Design of a corn stalk rubbing cone, Transactions of the Chinese Society for Agricultural Machinery, 38, 2, pp. 81-84, (2007)
  • [3] Technical specifications of quality evaluation for crop straw rubbing filament machines: NY/T509-2015, (2015)
  • [4] Wang J., Wang C., Wang F., Numerical simulation on three-dimensional turbulence air flow of 9R-40 rubbing and breaking machine based on fluent software, Transactions of the Chinese Society of Agricultural Engineering, 26, 2, pp. 165-169, (2010)
  • [5] Zhai Z., Wu Y., Wang C., Dynamic simulation and high-speed camera analysis on materials moving along throwing impellers, Transactions of the Chinese Society of Agricultural Engineering, 28, 2, pp. 23-28, (2012)
  • [6] Zhai Z., Yang Z., Gao B., Et al., Simulation of solid-gas two-phase flow in an impeller blower based on mixture model, Transactions of the Chinese Society of Agricultural Engineering, 29, 22, pp. 50-58, (2013)
  • [7] Lisowski A., Ewiatek K., Klonowski J., Et al., Movement of chopped material in the discharge spout of forage harvester with a flywheel chopping unit: Measurements using maize and numerical simulation, Biosystems Engineering, 111, 4, pp. 381-391, (2012)
  • [8] Song X., Dai F., Zhang X., Et al., Numerical simulation based on CFD-DEM coupling method and experiment of materials movement in the discharging device of kneading machine, Journal of China Agricultural University, 22, 5, pp. 99-107, (2017)
  • [9] Boac J.M., Ambrose R.P.K., Casada M.E., Et al., Applications of discrete element method in modeling of grain postharvest operations, Food Engineering Reviews, 6, 4, pp. 128-149, (2014)
  • [10] Oldal I., Safranyik F., Extension of silo discharge model based on discrete element method, Journal of Mechanical Science & Technology, 29, 9, pp. 3789-3796, (2015)
12