Externally Vaporizing System for Turbine Combustor.
Patent, Filed 10 Sep 86, patented 13 Jun 89,
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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The present invention relates to turbine engines, and, in particular, relates to a combustor therein. The present invention is directed toward providing a combustor in which the undesirable characteristics of prior liquid fuel systems are overcome in light of the advantages of a purely gaseous system. The externally vaporizing system of the present invention incorporates an auxiliary burner which is supplied with compressor discharge air at a rate which is regulated to the main fuel flow rate. The auxiliary burner is operated at approximately stoichiometric fuel-air-ratio, in order to provide very-hot, nearly-inert gases for vaporizing the main fuel supply. The main fuel is sprayed in the auxiliary burner exit gas stream where rapid mixing and evaporation occur. The resulting vaporized fuelinert gas mixture at about 800 F., preferably is then ducted and distributed to the individual main combustor fuel injectors where it is injected into the premixing ducts. Patents. KT
- Jet and Gas Turbine Engines