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US 5,209,656 AGranted
Combustion system for high velocity gas injection
AssigneePraxair Technology, Inc.
InventorsHisashi Kobayashi, Arthur W. Francis, Jr.
Life of this patent
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Abstract
High velocity gas injection system wherein high velocity and low velocity gases are injected into a cavity in a defined relationship such that the low velocity gas forms a protective barrier from combustion zone damage due to the flow dynamics caused by the high velocity gas.
Claims9
A combustion system comprising at least one gas injection means for injecting fuel and at least one gas injection means for injecting oxidant into a combustion zone at least one of said gas injection means comprising:
- (A) a cavity having an opening with a diameter D communicating with the combustion zone;
- (B) a nozzle for injecting high velocity main gas into the cavity toward the opening positioned at a recess from the opening, said recess having a length L such that L/D is not more than 3.0;
- and
- (C) means for providing low velocity protective gas having a composition substantially the same as that of the high velocity main gas into the cavity at a point further recessed from the opening than is the nozzle, for flow of protective gas around and past the nozzle.
1 more element
Dependencies are inferred from the claim text.