三次元差分法によるスクリュー式遠心ポンプ内ポテンシャル流れの解析

概要

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A three-dimensional finite difference method was used to simulate the incompressible potential flow in the blade row of a screw-type centrifugal pump which was operated as the pump and the turbine, in turn. The Kutta condition was imposed at the trailing edge of the blade. The potential jump of the vortex sheet was introduced to produce equal pressure on the suction and pressure blade surfaces at the trailing edge. As a result, the flow pattern in the impeller channel became very complicated and three-dimensional due to the relative circulation which existed in the flow passage, and the reversed flow was observed on the pressure blade surface. The pressure distribution inside the impeller channel which was obtained by numerical computations agreed qualitatively with the measured results. Furthermore, the calculated pump and turbine characteristics of the pump operating at normal capacity were in good agreement with the experimental results.
一般社団法人日本機械学会の論文
1992-03-25