Turbomachine and stage of turbomachine

摘要

The turbomachine stage has a stationary cascade of guide vanes (1) and rotating cascade of rotor blades (2) adjacent to each other. The guide vane gap region (10.2T) and rotor blade gap region (20.2L) extend axially beyond the guide vane cascade region (10.1) and a rotor blade cascade region (20.1), respectively. The gap regions define an axial gap between both cascades. Each of the opposing contours of the gap regions varies periodically in radial and axial directions around the circumference.