Fluid reaction surfaces (i.e. – impellers) – Method of operation
Reexamination Certificate
2011-03-29
2011-03-29
Look, Edward (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Method of operation
C416S09700R
Reexamination Certificate
active
07914257
ABSTRACT:
A turbine rotor blade for a gas turbine engine that includes a five-pass spiral serpentine flow cooling circuit with a first channel extending along the pressure side of the blade, a second channel extending along the suction side of the blade and connected to the first channel at the airfoil tip, a third channel extending along the pressure side and connected to the second channel in the root portion, and fourth channel extending along the suction side and connected to the third channel at the blade tip, and a fifth channel extending along the trailing edge and discharging cooling air through exit holes. The first and second channels are opposite to each other and have the same chordwise length, and the third and fourth channels are opposite to each other and have the same chordwise length to form a spiral flow path between the second and third channels and between the fourth and fifth channels. All five channels are connected in series to form the serpentine flow path. A leading edge supply channel provides for cooling air to a showerhead arrangement, and the leading edge channel is connected to the first channel at the blade tip. Pin fins and trip strips enhance the heat transfer coefficient from the blade to the cooling air throughout the channels.
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Ellis Ryan H
Florida Turbine Technologies, Inc.
Look Edward
Ryznic John
LandOfFree
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