Abstract
The development of the spanwise velocity profile in the incompressible viscous flow through cascades is approached from a new point of view. This approach shows the way in which the cascade loading, the secondary losses, and the inlet-flow conditions interact to produce the downstream profile. The analysis leads to the establishment of a family relationship for experimentally occurring profiles. An empirical velocity-profile shape is determined which has the same properties as the experimental family, and this is used to demonstrate the way in which the mean secondary losses are distributed over the blade height. The profile development is studied in multi-stage machinery, and the formation of an equilibrium state after some few stages is shown.
Work-done and blockage factors are computed for 50 per cent reaction compressor stages.
Get full access to this article
View all access options for this article.