Pilot injector for gas turbine engines

Power plants – Combustion products used as motive fluid – With safety device

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Details

60746, F02C 722, F02C 7262

Patent

active

057550905

ABSTRACT:
A combustor is disclosed capable of averting engine flameout. This combustor comprises a combustion chamber, which comprises an outlet for discharging heated combustion products. The combustor further comprises a primary injector for injecting a fuel and compressed air into a primary zone of the combustion chamber such that the fuel is induced into a recirculation zone at a corner of the primary zone. Combustion means for combusting the fuel and the compressed air in the combustion chamber resulting in heated combustion products are also incorporated in the combustor. Moreover, the combustor comprises sensing means for monitoring the combustor to substantially detect a pre-flameout condition. To realize the advantages of the present invention, the combustor additionally comprises a pilot injector for injecting a propellant into the recirculation zone in response to detecting said flameout condition by the sensing means, such that the propellant combusts as a diffusion flame.

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patent: 5097666 (1992-03-01), Shekleton et al.
patent: 5265414 (1993-11-01), Mouton
patent: 5303684 (1994-04-01), Brown et al.
patent: 5305596 (1994-04-01), Lampe et al.
patent: 5313778 (1994-05-01), Sweet et al.
patent: 5452574 (1995-09-01), Cowell et al.
"High Efficiency Industrial Gas Turbines For Cogeneration", W. H. Day, CONAE Cogen Conference, Mixico City, Jun. 24, 1993, pp. 1-14.
"Emission and Performance of a Lean-Premixed Gas Fuel Injection System For Aeroderivative Gas Turbine Engines", Snyder, Rosfjord, McVey (UTRC) and Hu and Schlein (PWA), pp. 1-7 (Jun., 1994).
"Comparison of Liquid Fuel/Air Mixing and Combustor NO.sub.x Emissions For a TE Nozzle Swirling Flowfield", Snyder, Rosfjord, McVey, Chiappetta (UTRC) pp. 1-16 and Figs. 1-18 (Jun. 1994).

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