Improvements in or relating to the cooling of turbine blades

• Main Author: CHAMBERLIN REGINALD HENRY DOUGLAS
• Format: Patent
• Language: English
• Published: 27.06.1956
• 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; 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

751,010. Turbine blade cooling. NAPIER & SON, Ltd., D. June 23, 1954 [July 6, 1953], No. 18735/53. Class 110(3) In a turbine blade for a gas turbine engine rotor, the root portion is so formed that a cavity is provided between it and the adjacent side of the root portion of an adjacent blade mounted in the rotor disc, the cavity having inlet and outlet passages by which cooling air (or other gas) can enter and leave continuously during operation. The inlet and outlet passages are situated at points in the cavity such that air will tend to circulate or swirl around the cavity before passing out through the outlet passage. The blade shown has a vane portion 11, a platform 12, a fir-tree root portion 13 and a part 14 between the root 13 and the platform 12. Square-shaped recesses 22 are formed in the two faces of the part 14, the adjoining recesses of a pair of adjacent blades forming a cooling air cavity. Air is supplied to the cavity through a passage formed by a cutaway portion 24 and leaves by a passage formed by a cutaway portion 26, the air moving through the cavity with a swirling motion. The upstream face of the part 14 is formed with inclined flanges 20 which together with flanges of adjacent blades form a series of spiral-shaped cooling air passages as described and claimed in Specification 751,011.