Cooled turbine blade

Details Cooled turbine blade Cooled turbine blade

1977-08-29

1979-12-18

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With heating, cooling or thermal insulation means

Changing state mass within or fluid flow through working...

415114, F01D 518

Patent

active

041792408

ABSTRACT:
A water-cooled turbine rotor blade having an enlarged radially-extending chamber forming a coolant reservoir connected to cooling passages subadjacent the blade surface. The channels interconnecting the reservoir with the passages are adjacent the blade tip so that the pressurized water (i.e., due to the centrifugal force caused by the rotation) in the reservoir flows into the channels at the tip and thence through the cooling passages radially inwardly. Heat absorption from the blade causes vaporization of the water as it flows through the passages. The cooling passages terminate radially inwardly (adjacent the hub or root portion) in a space in flow communication with the enlarged chamber and an exhaust port in the downstream face of the root so that vapor is exhausted at the downstream face and any liquid exiting the coolant passages is returned to the reservoir.

REFERENCES:
patent: 2667326 (1954-01-01), Ledinegg
patent: 2868500 (1959-01-01), Boulet
patent: 2883151 (1959-04-01), Dolida
patent: 3191908 (1965-06-01), Powell et al.
patent: 3550372 (1970-12-01), Craig
patent: 3816022 (1974-06-01), Day
patent: 3902819 (1975-09-01), Holchendler et al.
patent: 4118145 (1978-10-01), Stahl

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