Power plants – Combustion products used as motive fluid – Combustion products generator
Patent
1992-08-03
1994-06-07
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
Combustion products generator
60 3975, F02C 716
Patent
active
053178777
ABSTRACT:
A gas turbine engine having a compressor and an air-cooled turbine is provided with a cooling system for decreasing the temperature of the turbine cooling air. A heat exchanger, mounted on the compressor casing, receives a portion of the pressurized air which is bled from the compressor. A heat sink medium is pumped through the heat exchanger into heat exchange relationship with the pressurized air, thereby cooling the air. The cooled air is then further pressurized and routed to and circulated through the turbine rotor blades to provide improved cooling thereof. The intercooling of the compressor bleed air permits a reduction in the quantity of compressor air required for turbine rotor blade cooling or allows an increase in turbine entry temperature and thus provides an improvement in engine power and performance. In the case where the heat sink medium is engine fuel, the heat extracted from the compressor bleed air is returned to the engine operating cycle in the form of heated engine fuel.
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Roth et al. How to Use Fuel as a Heat Sink Space & Aeronautics, Mar., 1960 pp. 56-60.
Casaregola Louis J.
General Electric Company
Rafter John R.
Squillaro Jerome C.
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