Fluid reaction surfaces (i.e. – impellers) – Method of operation
Reexamination Certificate
2006-11-21
2006-11-21
Look, Edward K. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Method of operation
C416S09700R
Reexamination Certificate
active
07137779
ABSTRACT:
A gas turbine airfoil (34) includes sequentially connected, radially displaced chambers (e.g.,46, 58) within the airfoil. A cooling fluid supply chamber (46) is disposed within a first section (48) of a leading edge portion (36) of the airfoil and receives a cooling fluid flow (50). The cooling fluid supply chamber is in fluid communication with a first leading edge impingement chamber (52) disposed against a backside (44) of the leading edge portion. A discharge chamber (58) in serial fluid communication with the first impingement chamber is disposed radially outward of the first impingement chamber and within a second section (60) of the leading edge portion. A second leading edge impingement chamber (62) in fluid communication with the discharge chamber is disposed against a backside (64) of the leading edge portion in the second section. The chambers may be arranged to limit centrifugal force-induced pressure buildup in the respective chambers.
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Hanan Devin
Look Edward K.
Siemens Power Generation, Inc.
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