Research on the Performance of the Regenerative Pump with Non-Radial Vanes : (3rd Report, An Analysis of the Pump Performance)

概要

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An analysis of the pump performance is carried out, applying the momentum theory and the turbulent transfer theory. The results of the analysis are compared with the experiments in which the pump performance in the various combinations of the pump elements and the viscosity effects are investigated. The following results are obtained. (1) The applicable equations for the pump performance are deduced for two types of head capacity curves corresponding to the difference of fluid viscosity. These equations are approximately consistent with the experimental results. (2) The equations due to the momentum and the turbulent transfer theories almost agree with each other in disregard of the fluid viscosity or in large dimensions of the flow channels. (3) The coefficients of of shut-off head, maximum capacity, the torque and the maximum internal efficiency, as the characteristic factors for the pump performance, are examined by the equations and consequently the relation between the pump elements and the coefficients is made clear.
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