Turbine Rotor Blade Platform Cooling

• Main Authors: ELLIS, SCOTT EDMOND, SMITH, AARON EZEKIEL
• Format: Patent
• Language: English; French; German
• Published: 03.07.2013
• Subjects: 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

A platform cooling arrangement (130) in a turbine rotor blade (100) having a platform (110) positioned between an airfoil (102) and a root (104). The rotor blade (100), along a side that coincides with a pressure side (106) of the airfoil (102), includes a pressure side (128) of the platform (110) includes a topside extending from an airfoil base (172) to a pressure side slashface (126). The platform cooling arrangement (130) includes: a main plenum (132) residing just inboard of the topside (113) in the pressure side (128) of the platform (110), the main plenum (132) extending through the platform (110) from an upstream end (176) having an aft position to a downstream end (178) having a forward position; and cooling apertures (156). Near the upstream end (176), the main plenum (132) includes an aft switchback (123), and, between the aft switchback (133) and the downstream end (178), a forward arc (134). Each of the cooling apertures (156) extends from the main plenum (132) to a port formed on the pressure side slashface (126).