TURBINE AIRFOIL TRAILING EDGE COOLING SLOTS

A turbine airfoil (12) includes pressure and suction sidewalls (42, 44) extending along a span (S) from a base (34) to a tip (36). Spanwise spaced apart trailing edge cooling holes (30) in the pressure sidewall (42) end at corresponding spanwise spaced apart trailing edge cooling slots (66) extendin...

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Bibliographische Detailangaben
Hauptverfasser:	BERGHOLZ, ROBERT FREDERICK, JR, DURSTOCK, DANIEL LEE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION ENGINE PLANTS IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS 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 STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	A turbine airfoil (12) includes pressure and suction sidewalls (42, 44) extending along a span (S) from a base (34) to a tip (36). Spanwise spaced apart trailing edge cooling holes (30) in the pressure sidewall (42) end at corresponding spanwise spaced apart trailing edge cooling slots (66) extending chordally substantially to the trailing edge (TE). Each cooling hole (30) includes a plug (110) extending downstream through at least a portion of a spanwise diverging section (102) leading into the slot (66). The plug (110) may be spanwise centered in the hole (30) and may include a plug dome (114) rising up from a plug base (112) extending along a suction sidewall surface (40) of the suction sidewall (44). The cooling hole (30) may further include an inlet (70) leading to a metering section (100) with a constant area and constant width flow cross section (74) upstream of spanwise diverging section (102). Lands (50) may be disposed between the trailing edge cooling slots (66) forming slot floors (51) between lands (50).