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1.0 Executive Summary TAPS (Twin Annular Premixing Swirler) is the GE lean burn combustion system that has entered service on the GEnx engine for the 747-8 and 787 wide-body applications. The CLEEN TAPS II development program was a cost share between GE Aviation and the FAA to scale the TAPS technology to narrow-body applications, make additional design improvements to meet the CLEEN NOx emission goal, and demonstrate the design in full annular and core engine testing. The TAPS II development program successfully achieved the FAA CLEEN NOx emissions goal of 60% margin to the CAEP/6 limit. The FAA CLEEN TAPS II development program was divided into 3 phases: 1. TechnologyMaturation 2. SystemEngineering/Integration 3. TechnologyDemonstration During the technology maturation phase of the program, single cup flame tube tests were conducted to screen designs for NOx, efficiency and combustion dynamics. More than 25 configurations were tested. Out of that phase main mixer and fuel injector designs were selected for further evaluation. System engineering and integration included detailed design of the combustion system along with 5 cup sector and full annular component testing. Sector testing focused on altitude relight, efficiency, and emissions. Full annular testing evaluated all combustor characteristics - emissions, light off, lean blow out, efficiency, thermal data, exit temperature profile and combustion dynamics mapping. The full annular emissions data was used to assess engine emissions certification levels. The technology demonstration phase is where the TAPS II combustor was run on the LEAP core engine. Testing on the core focused on combustion operability, ignition, lean blow out and dynamics. Combustion efficiency at cruise and thermal data on the combustion chamber were also evaluated. Emission Results are shown in Section 4. Section 5 of this report summarizes the current technology readiness level of the TAPS II, additional development needs, and implementation into the field. The TAPS II is a part of the LEAP engine for the COMAC C919, the Airbus A320 Neo and the Boeing 737 Max. Page 3PDF Image | TAPS II Combustor Final Report
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