Dual flow air injection intraturbine engine and method of operating same
View Patent ↗A jet engine having an air intake and a compression section having first and second separate flow paths coupled to the air intake, the second flow path containing a fuel rich, fuel air mixture having an equivalence rate above the mixture flammability limit, the first flow path containing only air, a burner turbine section, the compression section being coupled directly to the burner turbine section, and means for injecting air from the first flow path into the fuel rich fuel air mixture of the said flow path in the burner turbine section to generate intraturbine diffusion layer burning of said fuel air mixture.
1. An engine comprising:
(A) an air intake, a compressor section, a burner turbine section, an afterburner section and a nozzle disposed in series within an outer portion;
(B) a rotating drum having an outer surface and an inner surface disposed in said compressor section and said burner turbine section;
(C) said rotating drum being non-permeable in said compressor section and dividing air flow from said air intake into first and second air flow paths which are maintained separate throughout said compressor section;
(D) a source of fuel coupled to said compressor section only at said second air flow path to inject fuel into said second air flow path in an amount sufficient to establish a fuel rich fuel air mixture having an equivalence ratio above the mixture flammability limit to preclude burning or combustion of the fuel air mixture in the compressor section;
(E) said rotating drum being permeable in said burner turbine section to inject air under pressure from said first air flow path into said fuel rich fuel air mixture in said second air flow path to reduce the equivalence ratio to a level to establish and maintain intraturbine burning of said fuel air mixture;
(F) said rotating drum having rotor blades extending outwardly from both said outer surface and said inner surface in said compressor section;
(G) said rotating drum having rotor blades extending outwardly from said outer surface only in said burner turbine section; and
(H) said outer portion including stator blades interspersed between said rotor blades.
2. An engine as defined in claim 1 wherein at least one of said stator blades in said second flow path defines a plurality of openings therethrough, said source of fuel being coupled to said at least one of said stator blades to inject fuel into said second flow path to create said fuel rich fuel air mixture.
3. An engine as defined in claim 1 wherein each of said rotor blades in said burner turbine section defines a plurality of openings therethrough to inject said compressed air into said burner turbine section for generating said intra turbine burning.
4. An engine as defined in claim 1 which further includes a fan upstream of said air intake.
5. An engine as defined in claim 1 wherein said permeable rotating drum extends into said afterburner section to inject air under pressure into said afterburner section to continue burning of the fuel air mixture contained therein.