General Electric Company

Anthony J Loprinzo

Ching-Pang Lee

Wayne Charles Hasz

Nesim Abuaf

Robert Alan Johnson

Harmon Lindsay Morton

Anthony John Dean

James Rollins Maughan

William Theodore Bechtel

Stephen Hugh Black

Andrew Luts

H Lindsay Morton

A combustor liner is provided on its backside cooling surface with a braze alloy coating and cooling enhancement material, preferably metallic particles to enhance the heat transfer between the liner and the cooling medium. The surface area of the backside coated area is increased substantially by the coating and particles in relation to the uncoated surface areas. Consequently, the life of the liner is extended.

Method and apparatus for enhancing heat transfer in a combustor liner for a gas turbine

The dual-fuel nozzle for a gas turbine and combustor includes a liquid fuel nozzle surrounded by a gas fuel nozzle. A converging sleeve surrounds the converging outer wall of the combined liquid fuel and gaseous nozzle to form a duct of decreasing cross-sectional area in a downstream direction whereby air flow through the duct accelerates toward the conical droplet spray pattern emerging from the liquid fuel nozzle. An inside swirler is located upstream of the liquid fuel tip to swirl the air flowing through the duct. An outer swirler is provided about the downstream end of the sleeve, likewise to swirl air. The accelerated swirling air flow through the duct and outer swirling air flow preclude impingement of oil spray droplets onto metal surfaces of the nozzle and hence prevent carbon deposition thereon which would otherwise be deleterious to the liquid fuel and gaseous nozzles.

Dual-fuel nozzle for inhibiting carbon deposition onto combustor

Sleeves (28) are circumferentially spaced from one another about the liner of a combustor body (12) of a dry low NO.sub.x combustor. The sleeves carry dilution air into the dilution zone. Cooling air is supplied a venturi (20) to cool the venturi and the cooling air flows into the reaction volume. The dilution air sleeves penetrate sufficiently to thoroughly mix the dilution air with the core of hot gases of combustion and, by vorticity effects caused by the flow past the sleeves, thoroughly mix the generally annular flow of cooling air from the venturi with the hot gases of combustion. The thorough mixing of both the cooling air and dilution air inhibits or minimizes the formation of cold areas or streaks within the reaction volume such that CO to CO.sub.2 reactions are not quenched, affording reduced CO emissions.

Dilution flow sleeve for reducing emissions in a gas turbine combustor

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Clifton Park, NY, United States of America

Anthony J Loprinzo