Internally cooled airfoil for a rotary machine

• Main Authors: KRUECKELS JOERG, BRANDL HERBERT, WARDLE BRIAN KENNETH, WIDMER MARC
• Format: Patent
• Language: English
• Published: 22.04.2015
• Subjects: BLASTING; CASTING; ENGINE PLANTS IN GENERAL; FOUNDRY MOULDING; HEATING; INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS; INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PERFORMING OPERATIONS; POWDER METALLURGY; STEAM ENGINES; TRANSPORTING; WEAPONS

The invention refers to an internally cooled casted airfoil for a rotary machine, preferably a gas turbine engine comprising a suction (1) and a pressure (2) side wall each extending in an axial direction, i.e. from a leading to a trailing edge region (3) of said airfoil; at least one suction wall sided cooling channel (4) extending in axial direction confined by the suction side wall (1) and a first inner wall (5); at least one pressure wall sided cooling channel (6) extending in axial direction confined by the pressure side wall (2) and a second inner wall (7); and at least one feed chamber (8) being defined between said first and second inner wall (5, 7) for feeding said at least one suction and pressure sided cooling channel (4, 6) each by at least one through hole (9, 10) inside of said first and second inner wall (5, 7). The invention is characterized in that said at least one suction wall sided cooling channel (4) and said at least one pressure wall sided cooling channel (6) extend into the trailing edge region (3) separately, and said at least one suction wall sided cooling channel (4) and said at least one pressure wall sided cooling channel (6) join before discharging at the trailing edge.