唐みファンの羽根車出口部近傍の流れに関する研究 : 第3報,羽根車近傍の静圧等値面と吸込口・吐出し口近傍のパーティクルによる一考察 : 流体工学,流体機械

抄録

This study aimed at clarifying unsteady flow near the delivery port of winnowing fans using CFD technology, the commercially available flow analysis software FLUENT/UNS, and the visualization software AVS. Both standard impellers and forward-inclined impellers were studied for comparison purposes. The results of this investigation demonstrate that forward-inclined impellers have better performance in terms of producing uniform flow. They develop many points where the static pressure is low, and from where large and unstable three-dimensional vortexes are produced. It was also demonstrated that a characteristic of winnowing fans is that they produce a balance between the swirling now after the suction port and that after the delivery port. This means that the flow after the impeller can be made uniform within a short distance.