二次元モデルバルブまわりの流れの数値計算

概要

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In order to study the flow behavior around a valve, the conservation equations of momentum were numerically solved for the two dimensional flow field in a closed vessel, in which a rectangular valve was equipped with and was driven upward at a constant velocity. The influence of the moving velocity and the length of the valve on the streamlines, velocity and vorticity distribution was investigated. Further, the visualization experiments were carried out under the same geometrical conditions for the numerical calculations. By comparing both results, it was found that the numerical calculation could simulate the experiment very well. Clockwise vortices were found to be formed behind the moving valve and moved downstream with the upward motion of the valve. Increasing the moving velocity of the valve made the clockwise vortices stronger in the intensity and larger in the size. By increasing the length of the valve, the velocities around the symmetrical surface were increased, and the generated vortices approached the symmetrical surface.
東海大学の論文