The calculation of quasi three dimensional frictionless compressible flow in axial turbomachines

A method of calculating quasi-three dimensional frictionless flow in axial turbomachines is presented. The flow field is calculated not only in the bladeless spaces but also within the rows of blades. The compressibility, the blade forces and the blade thickness are taken into account. A finite difference method, an extension of earlier work with which initially the quasi-three dimensional flow could only be calculated within a stationary or rotating row of blades, is used. As calculation examples, the flow parameters in the complete field of three axial turbine stages are given.