Claims
- 1. A combustor dome assembly, comprising:
- (a) an annular dome plate with two circumferential rows of spaced openings therethrough to form a double annular combustor having inner and outer domes;
- (b) a swirl cup assembly attached to each of said dome plate openings, said swirl cup assembly including a venturi, a sleeve, a primary swirler, a backplate, a secondary swirler and a splashplate;
- (c) an inner cowl and an outer cowl connected to the radially inner and outer ends of said dome plate; and
- (d) an integral cowl plate/ferrule retainer attached to said backplate for blocking air low to said dome plate in addition to that provided by said inner and outer cowls, wherein said integral cowl plate/ferrule retainer is aft of a cowl plane defined between said inner and outer cowls and forward of said backplate.
- 2. The combustor dome assembly of claim 1, wherein only said outer annular domes include said integral cowl plate/ferrule retainer.
- 3. The combustor dome assembly of claim 1, wherein only said inner annular domes include said integral cowl plate/ferrule retainer.
- 4. The combustor of claim 1, wherein said dome plate is a single continuous annular piece.
- 5. The combustor dome assembly of claim 1, wherein said integral cowl plate/ferrule retainer includes a cowl plate portion having flanges which extend beyond the outer diameter of said swirl cup.
- 6. The combustor dome assembly of claim 5, wherein said flanges are substantially rectangular in shape.
- 7. The combustor dome assembly of claim 5, wherein said flanges remain radially inside of said outer cowl for said outer dome and radially outside of said inner cowl for said inner dome.
- 8. A combustor dome assembly, comprising:
- (a) a single continuous annular dome plate having at least one circumferential row of spaced openings therethrough;
- (b) a swirl cup assembly attached to each of said dome plate openings, said swirl cup assembly including a venturi, a sleeve, a primary swirler, a secondary swirler, a backplate, and a splashplate;
- (c) an inner cowl and an outer cowl connected to the radially inner and outer ends of said dome plate;
- (d) a ferrule located immediately upstream of said swirl cup assembly which acts as an interface between a fuel nozzle and said swirl cup assembly; and
- (e) an integral cowl plate/ferrule retainer immediately upstream of and connected to said backplate, wherein a ferrule retainer portion is sized to retain said ferrule while allowing said ferrule to float radially therewithin and a cowl plate portion includes flanges which extend beyond the outer diameter of said swirl cup assembly to provide blockage of incoming air in addition to blockage provided by said inner and outer cowls.
- 9. The combustor dome assembly of claim 8, wherein said integral cowl plate/ferrule retainer is a single annular piece.
- 10. The combustor dome assembly of claim 8, wherein said ferrule includes a tab which fits into a slot in said ferrule retainer portion to prevent rotation of said ferrule.
- 11. The combustor dome assembly of claim 8, wherein said integral cowl plate/ferrule retainer includes an annular conical section between said cowl plate portion and said ferrule retainer portion.
- 12. The combustor dome assembly of claim 11, wherein said dome plate has two circumferential rows of spaced openings therethrough to form a double annular combustor having inner and outer domes.
- 13. The combustor dome assembly of claim 12, wherein only said outer annular domes include said integral cowl plate/ferrule retainer.
- 14. The combustor dome assembly of claim 13, wherein said cowl plate flanges remain radially inside said outer cowl.
- 15. The combustor dome assembly of claim 13, wherein an inner edge of said cowl plate portion is rolled over to provide additional stiffness and a smooth aerodynamic flow path.
- 16. The combustor dome assembly of claim 13, wherein said integral cowl plate/ferrule retainer is located axially aft of a cowl capture plane extending radially between said inner and outer cowls, wherein said outer domes are pressurized with flow turned by said cowl plate portion and captured under said outer cowl, whereby pressure recoveries in said outer domes are increased.
- 17. A double annular combustor assembly, comprising:
- (a) a single continuous annular dome plate having two circumferential rows of spaced openings therethrough to form inner and outer domes;
- (b) a swirl cup assembly attached to each of said dome plate openings, said swirl cup assembly including a venturi, a sleeve, a primary swirler, a secondary swirler, a backplate, and a splashplate;
- (c) an inner cowl and an outer cowl connected to the radially inner and outer ends of said dome plate;
- (d) a ferrule located immediately upstream of said swirl cup assembly which acts as an interface between a fuel nozzle and said swirl cup assembly; and
- (e) an integral cowl plate/ferrule retainer immediately upstream of and connected to said backplate of said outer domes, wherein a ferrule retainer portion is sized to retain said ferrule while allowing said ferrule to float radially therewithin and a cowl plate portion includes flanges which extend beyond the outer diameter of said swirl cup assembly to provide blockage of incoming air in addition to blockage provided by said inner and outer cowls.
Government Interests
The Government has rights in this invention pursuant to Contract No. F33657-83-C-0281 awarded by the Department of Air Force.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4194358 |
Stenger |
Mar 1980 |
|