Combustor dome heat shield
First Claim
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1. An annular combustor for a gas turbine engine comprising:
- an annular combustion chamber having an inner circumference and an outer circumference;
a plurality of circumferentially spaced fuel injectors in said combustion chamber;
swirl means for introducing fuel and primary air to said combustion chamber in a swirl around the axis of each of said injectors;
at least one ignitor extending from one circumference of said combustion chamber;
an annular support dome structure for supporting said plurality of fuel injectors and for passing secondary air therethrough;
a plurality of circumferentially spaced heat shields interposed between said dome structure and said combustion chamber, each one of said heat shields secured to one of said fuel injectors; and
an overlap portion on each of said heat shields axially overlapping an adjacent heat shield, whereby secondary air passing between said heat shields is deflected away from the axial direction toward the circumferential direction.
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Abstract
An annular combustor has a plurality of fuel injectors 14, each supporting a heat shield 30. Each shield has an overlap portion 42 deflecting cooling air passing between the shields, thereby avoiding a curtain of air between the flames of adjacent fuel injectors.
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Citations
6 Claims
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1. An annular combustor for a gas turbine engine comprising:
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an annular combustion chamber having an inner circumference and an outer circumference; a plurality of circumferentially spaced fuel injectors in said combustion chamber; swirl means for introducing fuel and primary air to said combustion chamber in a swirl around the axis of each of said injectors; at least one ignitor extending from one circumference of said combustion chamber; an annular support dome structure for supporting said plurality of fuel injectors and for passing secondary air therethrough; a plurality of circumferentially spaced heat shields interposed between said dome structure and said combustion chamber, each one of said heat shields secured to one of said fuel injectors; and an overlap portion on each of said heat shields axially overlapping an adjacent heat shield, whereby secondary air passing between said heat shields is deflected away from the axial direction toward the circumferential direction. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification