High pressure gas turbine rotor blade for use in e.g. turbojet engine, has outlet opening of channel, by which fresh air is emitted, situated on bevel, where opening is sufficiently formed near end side of concave edge

摘要

#CMT# #/CMT# The blade has an open cavity (5) provided at a free end (3) of the blade, where the cavity is delimited by a base wall (7) and concave and convex edges (9, 10). The cavity includes an outer cooling channel (20) that communicates with an inner cooling passage and emerges at the level of the concave edge. A bevel (25) is situated between an end side and an outer lateral side (28) of the concave edge. An outlet opening of the channel by which fresh air is emitted is situated on the bevel, where the opening is sufficiently formed near the end side of the concave edge. #CMT#USE : #/CMT# Used in a turbomachine (claimed) e.g. turbojet engine. #CMT#ADVANTAGE : #/CMT# The outlet opening of the outer cooling channel by which the fresh air is emitted is situated on the bevel, where the opening is sufficiently formed near the end side of the concave edge, thus cooling the end side of the concave edge in an efficient manner while limiting the risk of the channel to be opened, and hence preventing the irreversible deformation of the end side of the concave edge. The bevel is situated between the end side and the outer lateral side of the concave edge, thus preventing a hot gas inlet zone from enlarging between the concave edge and a collar. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a perspective view of a free end of a blade. 3 : Free end 5 : Open cavity 7 : Base wall 9 : Concave edge 10 : Convex edge 20 : Outer cooling channel 25 : Bevel 28 : Outer lateral side.