Cooling method and apparatus for rotor vanes of a thermodynamic engine

摘要

The arrangement has a hollow channel (5) passing through the foot (4) of a runner blade that is attached to a rotor shaft (6) to rotate about a rotation axis (7). The hollow channel has an inlet opening (9) and an outlet opening (10) for cooling air at different distances from the rotation axis and arranged on the same side of the blade foot. An Independent claim is also included for a method of cooling a runner blade in a heat engine.