Turbine engine having a reverse flow annular vortex combustor
A gas turbine engine including a compressor section for compressing air flowing therethrough to provide a compressed air flow and a reverse flow annular vortex combustor including a combustion chamber having a primary combustion zone, the combustion chamber configured to combust a mixture of a fuel flow and the compressed air flow in the primary combustion zone to generate a primary zone vortex. The reverse flow annular vortex combustor has a combustor liner and one or more driver openings extending through the combustor liner, the one or more driver openings providing a driver air flow formed of the compressed air flow. The driver air flow enters the combustion chamber as a wall of air for shaping and driving the primary zone vortex in the combustion chamber.
1. A gas turbine engine comprising:
a compressor section for compressing air flowing therethrough to provide a compressed air flow; and
a reverse flow annular vortex combustor including a combustion chamber having a primary combustion zone, the combustion chamber configured to combust a mixture of a fuel flow and the compressed air flow in the primary combustion zone to generate a primary zone vortex, the reverse flow annular vortex combustor including:
a combustor liner; and
one or more driver openings extending radially through the combustor liner, the one or more driver openings providing a driver air flow formed of the compressed air flow, wherein the driver air flow enters the combustion chamber as a wall of air for shaping and driving the primary zone vortex in the combustion chamber, wherein one or more of the one or more driver openings are oriented at an angle in a downstream direction to direct the driver air flow in the downstream direction to pull combustion gases from the primary zone vortex downstream within the combustion chamber.
2. The gas turbine engine of claim 1 , wherein the one or more driver openings are angled in a circumferential direction.
3. The gas turbine engine of claim 1 , wherein the one or more driver openings are angled with respect to a longitudinal centerline axis of the reverse flow annular vortex combustor.
4. The gas turbine engine of claim 1 , wherein the one or more driver openings are at a tangential angle with the combustor liner to provide a bulk swirl to the driver air flow.
5. The gas turbine engine of claim 1 , further comprising a plurality of cooling holes, wherein the one or more driver openings are larger than each of the plurality of cooling holes, and wherein the plurality of cooling holes provide cooling to the combustor liner but do not provide the wall of air.
6. The gas turbine engine of claim 1 , wherein the combustor liner comprises an inner liner and an outer liner, and the inner liner is a contoured inner liner.
7. The gas turbine engine of claim 6 , wherein the contoured inner liner enlarges an interior volume of an aft end of the combustion chamber as compared to the interior volume of a forward end of the combustion chamber.
8. The gas turbine engine of claim 7 , further comprising a combustor casing surrounding the reverse flow annular vortex combustor, wherein an inner passage between the contoured inner liner and the combustor casing is larger at the forward end of the reverse flow annular vortex combustor as compared to the aft end of the reverse flow annular vortex combustor.
9. The gas turbine engine of claim 7 , wherein the contoured inner liner is contoured at the primary combustion zone by extending radially inward from the aft end to a minimal radial distance toward a longitudinal centerline axis of the reverse flow annular vortex combustor and extending radially outward away from the longitudinal centerline axis to a maximum radial distance at a contour axis, the primary combustion zone being defined between the aft end and the contour axis such that the contoured inner liner reinforces the primary zone annular vortex and provides a turning radius to a combustor outlet that directs a flow of the combustion gases into a first stage of a high-pressure turbine.
10. The gas turbine engine of claim 1 , wherein the one or more driver openings comprise a first driver opening and a second driver opening.
11. The gas turbine engine of claim 10 , the combustor liner having an outer liner and an inner liner, wherein the first driver opening is provided in the outer liner and the second driver opening is provided in the inner liner.
12. The gas turbine engine of claim 10 , wherein the first driver opening is axially staggered from the second driver opening.
13. The gas turbine engine of claim 10 , wherein the primary zone vortex is maintained between an aft end of the combustion chamber and the first driver opening.
14. The gas turbine engine of claim 10 , wherein the first driver opening and the second driver opening are axially staggered a distance that does not generate a secondary combustion zone and does not generate a secondary zone vortex.
15. The gas turbine engine of claim 10 , wherein the first driver opening and the second driver opening are axially staggered a distance that provides a secondary combustion zone and generates a secondary zone vortex within the secondary combustion zone.
16. The gas turbine engine of claim 15 , wherein the secondary zone vortex is downstream of and axially forward of the primary zone vortex.
17. The gas turbine engine of claim 15 , wherein the primary zone vortex and the secondary zone vortex are counterrotating.
18. The gas turbine engine of claim 15 , further comprising a third driver opening that is axially staggered from the second driver opening a distance that provides a tertiary combustion zone and generates a tertiary zone vortex within the tertiary combustion zone.
19. The gas turbine engine of claim 18 , wherein the secondary zone vortex is downstream of and axially forward of the primary zone vortex, and the tertiary zone vortex is downstream of and axially forward of the secondary zone vortex.
20. The gas turbine engine of claim 19 , wherein the primary zone vortex and the tertiary zone vortex rotate in the same direction, and the secondary zone vortex rotates in the opposite direction.