Cooled turbine blade

Details Cooled turbine blade Cooled turbine blade

F - Mech Eng,Light,Heat,Weapons

01

D

170/71

F01D 5/12 (2006.01) F01D 5/18 (2006.01) F02C 7/12 (2006.01)

Patent

CA 1075160

ABSTRACT OF THE DISCLOSURE 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 passage 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.

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