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Numerical Simulation and Experiment of Gas-solid Two-phase Flow in a Cross-flow Grain Cleaning Device

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  131586235,  2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: http://dx.doi.org/10.13031/aim.20131586235) @2013
Authors:   Xiaoqiang Du, Kenan Ni, Jianneng Chen, Chuanyu Wu, Yun Zhao
Keywords:   Grain cleaning cross-flow blower gas-solid two-phase flow trajectory CFD.

Abstract. A cross-flow grain cleaning device was designed by employing the cross-flow blower. Based on the standard K-ε turbulence model and particle discrete phase model, the characteristics of gas-solid two-phase flow in the developed cleaning chamber were numerically simulated. The distribution of airflow velocity and particle trajectory was obtained. The results indicate that the airflow in the cleaning chamber presented a certain delamination where the airflow near the top and bottom regions of the chamber had lower velocity than that passing through the mid-chamber and the airflow distribution in each layer was steady without obvious vortex. Each grain component had respective particle trajectory which was significantly different. The numerical simulation results were verified by the experiments conducted on the test rig of the cross-flow grain cleaning device, which indicates that effective separation on each grain component could be achieved in the developed cross-flow grain cleaning device.

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