Research on the Flow in a Centrifugal Pump Impeller : 7th Report, On the Axisymmetric Flow in a Mixed-Flow Impeller

抄録

To design a mixed-flow impeller, the impeller must be divided into partial runners by flow surfaces, which are determined usually without considering the action of blades. In this report, the following two methods established by the author to determine the flow surface are described. These methods are more reasonable than the usual one because proper considerations have been given to the action of blades. (1) In the 1st method, the author has solved numerically the fundamental partial-differential equations for the flow in the interior, in front, and in the rear of the impeller, which have been derived from the equations given by Lorenz and Bauersfeld. (2) In the 2nd method which is an approximate method, the author has solved graphically the fundamental equation for the flow in the interior of the impeller by transforming the coordinates. An example is shown comparing the 1st and the 2nd method with the usual one.