EULER INVERSE THROUGHFLOW MODEL BASED ON AN IMPLICIT UPWIND TIME MARCHING TECHNIQUE

摘要

The model prescribes the meridional loading distribution over the blade regions. It predicts the axisymmetric flowfield and related hub-to-tip streamsurface geometry. The implicit approach is meant to reach the steady solution more quickly, but most of all to carry the enforcement of the mass flowrate at the outlet section. This allows the numerical procedure to design high camber turbine blades. The capabilities of the method in dealing with single strong deflection cascades and a complete turbine stage are proved.