Power plants – Combustion products used as motive fluid – Combustion products generator
Patent
1976-08-09
1981-06-09
Bentley, Stephen C.
Power plants
Combustion products used as motive fluid
Combustion products generator
60746, 60749, F23R 342
Patent
active
042716748
ABSTRACT:
A combustor assembly having improved performance at low engine power operation and at altitude relight includes an annular combustion chamber, two fuel sources, and a premixing passageway having an outlet positioned adjacent either the inner and outer annular well of the combustion chamber. A perforated baffle is disposed across the outlet of the premixing passageway, the outlet being in gas communication with the combustion zone. In a preferred embodiment, for low power operation, such as for idle or for altitude relight, fuel from a first source is sprayed directly into the combustion zone. During this low power operation a localized stagnation region is created adjacent the fuel source which acts as a continuous ignition source for the combusting fuel-air mixture within the combustion zone. For high power operation such as takeoff, climb and cruise, fuel from a second source is injected into the premixing passageway where it is atomized by air entering the passageway from the compressor. During this high power operation the fuel-air mixture within the premixing passageway is directed into the combustion zone through the perforated baffle and radially across the combustion zone toward the opposite wall of the combustion chamber; the perforated baffle creates a localized stagnation region adjacent its surface which acts as a continuous ignition source for the combusting fuel-air mixture within the combustion zone during high power operation.
REFERENCES:
patent: 2635426 (1953-04-01), Meschino
patent: 2679137 (1954-05-01), Probert
patent: 3055179 (1962-09-01), Lefebvre et al.
patent: 3290880 (1966-12-01), Poyser
patent: 3820324 (1974-06-01), Grindley et al.
Cashman Kenneth A.
Marshall Richard L.
Bentley Stephen C.
Friedland Normal
United Technologies Corporation
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