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Dual-Spray Fuel Nozzle for Low Emissions Gas Turbine Combustors

CFD Research Corporation

Huntsville, AL
 

A fuel nozzle that provides high turndown fuel-air ratio and low emissions in small aircraft gas turbine engines

• Designed fuel nozzle using advanced CFD analysis
• Tested prototype nozzles at atmospheric pressure for lean blowout
• Fabricated and tested selected fuel nozzle in full annular combustor test at idle and simulated full power operating  conditions
• Demonstrated lean blowout fuel-air ratio of 0.003 at idle conditions.  This exceeds the current AST goal of 0.005

• Received over $175,000 in contracts from industry to study potential in AST combustors
• Selected as candidate by GE for 70% NOx reduction regional engine combustor program; fabrication and testing started in 1998. Received $500K in Phase III funding from GE
• If successfully demonstrated, nozzle has potential of being a production engine part. CFDRC will give the rights of the fuel  nozzle to a fuel nozzle vendor in exchange for royalty fees 

• Potential use in low emission aircraft gas turbine combustors
• Basis for further development of low NOx fuel -air mixers for  land based gas turbine engines and other industrial combustion systems, eg., burners, boilers, process heaters, etc.

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