ボリュートケーシング付き斜流ポンプの変動流体力〔流体工学, 流体機械〕

概要

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The effect of an unsteady hydraulic force on an impeller of a mixed-flow pump with a double volute casing that has an unsteady pressure distribution is experimentally investigated to show the relationship between pressure fluctuation and unsteady radial and axial thrust. The results show that (1) the time averaged axial thrust is caused primarily by the total head of the pump and secondarily by the effect of the flow at gaps between the impeller and the casing, (2) the unsteady radial and axial thrust is induced by the change of instantaneous pressure distribution in the volute casing, (3) the pattern of this pressure distribution is characterized by the operating flow rate of the pump, and (4) the fluctuation amplitude of the radial thrust depends on the number of blades or the pump configuration, whereas, that of the axial thrust is independent of these factors.
社団法人日本機械学会の論文
1997-10-25