TAPS II Combustor Final Report

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TAPS II Combustor Final Report ( taps-ii-combustor-final-report )

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The “design intent” emissions results are consistent with the earlier sector test data. The sector test had the correct main mixer flow and the average measured NOx data met the CLEEN goal. The higher NOx on the full annular rig is due to the low flowing main mixer. The reduced flow to the main mixer is due to a geometry issue in the cowl/mixer flow path. An improve design has been developed through CFD analysis and future testing will include the improvement. The sector was run in a plenum rather than the engine flow path so it had the design intent air flow splits. Smoke data was also taken on the full annular rig. On TAPS combustion systems, the peak smoke number occurs at the maximum pilot only (rich burn) condition, which is the 30% LTO point. When the mains are fueled (lean operation) there is no measurable smoke. Peak smoke number measured on the TAPS II was 4.2 at 30% power. The initial proposal included PM measurement. However, at the time tests were conducted, the standard for PM measurement had not been selected by the E31 committee, so this effort was dropped from the program plan. The 0 smoke number at higher power suggest that the lean burn TAPS II system should have low PM levels. The results of the TAPS II combustor with a LEAP engine cycle can also be compared to the baseline engine it will replace. The CFM56-5B3/3 average measured emissions certification data was shown in back in Table 2. Figures 9 and 10 compare the TAPS II results to the baseline engine. TAPS II has significant reduction for all 4 regulated pollutants and the TAPS II technology NOx emissions are at 39.3% of CAEP/6 (or 60.7% margin to CAEP/6), which meets the CLEEN NOx goal of 60% margin to CAEP/6. Page 16

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