Annular flow channel for axial flow turbomachine

摘要

The channel is arranged around a machine axis (2), which runs in an axial direction. The channel is defined by circular narrow walls (24) for guiding a main stream. Each wall has multiple reverse flow passages (46) through which a partial stream is led back into the main stream. Turbine blades (32) arranged in the channel are moved in a predetermined rotational direction (U) along a periphery of the walls, or the walls are moved in the predetermined rotational direction opposite to the blades. An intake position of each passage lies in front of corresponding feeding positions.