Power plants – Combustion products used as motive fluid – Combustion products generator
Patent
1988-09-27
1990-03-27
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
Combustion products generator
415117, 416 95, F02C 718, F01D 508
Patent
active
049109588
ABSTRACT:
The cooling-air ducting of the axial flow gas turbine runs in the area of the last blading stage (9+14) radially inwards of the heat-accumulation segments (23, 24) inside the outer boundary of the rotor (4) and through blade root channels (21) in the blade roots of the last moving blade ring (9) and finally through a cooling-air blade ring (28) fixed to the rotor into the diffuser into which the cooling-air flow enters with a velocity vector which essentially corresponds to the average velocity vector of the exhaust-gas flow entering into the diffuser. This avoids the flow losses which occur when the cooling-air flow passes out into the exhaust-gas flow in the area of the last stage or stages. At the same time, the temperature difference between the rotor circumference and the last rotor disk (4), likewise cooled by tapped air from the compressor, is in this way reduced, as a result of which the thermal stresses in the rotor are also reduced.
REFERENCES:
patent: 4113406 (1978-09-01), Lee
patent: 4186554 (1980-02-01), Possell
patent: 4425079 (1984-01-01), Speak et al.
patent: 4456427 (1984-06-01), Evans
patent: 4469470 (1984-09-01), Geary
patent: 4551062 (1985-11-01), Geary
Eirmann, Albert; Keppel, Wolfgang, "Die GT13E-Eine Gasturbine Grober Leistung Mit Gutem Wirkungsgrad," Brown Boveri Technik, Mar., 1985, pp. 104-110.
BBC Brown Boveri AG
Casaregola Louis J.
Thorpe Timothy S.
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