TEARDROP FILM COOLED BLADE

A turbine blade (10) includes an airfoil (12) having an internal cooling circuit (30) with a first flow passage (34) disposed directly behind the leading edge (22) followed by a second flow passage (36) separated therefrom by a corresponding bridge (38). The bridge (38) includes a row of impingement...

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Bibliographische Detailangaben
Hauptverfasser:	HEEG, ROBERT JOHN, SCHMID, SCOTT JOSEPH, KUMAR, GANESH NAGAB, NORTON, BRIAN ALAN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A turbine blade (10) includes an airfoil (12) having an internal cooling circuit (30) with a first flow passage (34) disposed directly behind the leading edge (22) followed by a second flow passage (36) separated therefrom by a corresponding bridge (38). The bridge (38) includes a row of impingement apertures (40) for cooling the leading edge. The suction sidewall (20) of the airfoil includes a row of diffusion film cooling first holes (42) extending in flow communication with the first passage (34). The first holes (42) have a compound inclination angle, with a quadrilateral cross section forming a generally teardrop shaped outlet (46) in the convex contour of the suction sidewall.