Gas turbine airfoil cooling

F - Mech Eng,Light,Heat,Weapons – 01 – D

Patent

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Details

F01D 5/18 (2006.01) F02C 7/18 (2006.01)

Patent

CA 2266449

A cooling system for airfoil vanes in a turbine of a gas turbine engine wherein the airfoil platforms have openings downstream of the insert tube for passing spent platform impingement coolant air into the airfoil cavity downstream of the insert tube to increase the pressure in the aft zone of the airfoil to improve the temperature gradient across the span of the airfoil.

L'invention concerne un système de refroidissement de pales à profil aérodynamique d'une turbine de moteur à turbine à gaz, dans lequel les plates-formes à profil aérodynamique sont munies d'ouvertures en aval du tube d'insertion, qui sont destinées à faire passer de l'air éteint de refroidissement d'impact des plates-formes dans la cavité du profil aérodynamique en aval du tube d'insertion afin d'augmenter la pression exercée sur la zone arrière du profil aérodynamique et améliorer le gradient de température sur toute l'étendue dudit profil.

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