回転円盤周りの流れにおける半径隙間効果と複雑化過程の評価(渦・回転+大気(1),一般講演)

概要

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The purpose of this study is to evaluate numerically the influence of the radial and axial gaps around the rotating disc in a cylindrical casing. This includes analysis of flow where the radial gap width between the disc rim and the inner wall of the casing appears or not. The complex process of the flow is also evaluated by several ways in this study. The signs of the front angles of the flow with and without the radial gap are different. The flow with the radial gap has a negative value, and the flow without the radial gap has a positive value. The three dimensional attractor and recurrence plot could extract the Reynolds number at which the flow transits to turbulent flow. The four quadrant classification is also used to detect the difference of the flow structure between the spiral flow and the turbulent flow.
2009-09-02