Power plants – Combustion products used as motive fluid – Combustion products generator
Patent
1994-09-28
1996-09-17
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
Combustion products generator
415115, F02C 712
Patent
active
055557210
ABSTRACT:
A turbine cooling supply circuit for a gas turbine engine is disclosed in which the flow of coolant through the engine is directed to minimize temperature rise prior to discharge into the turbine. Bleed air from an impeller stage of a compressor is channeled along a backwall thereof into a cavity disposed radially inwardly of a combustor casing. The cavity is divided by a lightweight tubular member having a circumferentially uniform contour into a non-flow zone proximate the casing and a flow zone proximate a rotor. Maintenance of a high tangential flow component in the bleed flow in the flow zone facilitates discharge of the flow through apertures in a rotor into a bore portion thereof, minimizing work input and temperature rise of the coolant. Further, the coolant is isolated from the hot casing wall and nonuniform structures disposed thereon, thereby reducing heat flux and temperature rise associated with aerodynamic drag caused by increased surface area, nonuniform interruptions in the stationary surface or any combination thereof. Features are incorporated in the tubular member to provide margin against buckling.
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"Combined Power", Flight International 9-15, Jun. 1993, pp. 64 and 67-70.
Bourneuf John J.
Demers Daniel E.
Lenahan Dean T.
Plemmons Larry W.
Casaregola Louis J.
General Electric Company
Hess Andrew C.
Traynham Wayne O.
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