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

摘要

A cross-flow grain cleaning device was designed by employing the cross-flow blower. Based on the standard K-e 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.