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N+3 and N+4 Generation Aeropropulsion Engine Combustors: Part 3 — Small Engines’ Emissions and Axial Staging Combustion Technology

[+] Author Affiliations
Hukam C. Mongia

Purdue University, West Lafayette, IN

Paper No. GT2013-94572, pp. V01AT04A039; 15 pages
  • ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
  • Volume 1A: Combustion, Fuels and Emissions
  • San Antonio, Texas, USA, June 3–7, 2013
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5510-2
  • Copyright © 2013 by ASME


Comprehensive assessment of the small rich-dome engines was conducted leading to the following emissions correlations:

NOxEILEC = 0.02991 × OPR1.9791

RMSE = 3.0%

NOxEITALON II = 0.01666 × OPR2.1403

RMSE = 2.0%

NOxEICFMTI = 0.06763 × OPR1.7458

RMSE = 2.1%

NOxEICF34 = 0.0541 × OPR1.7917R2 = 0.9794

RMSE = 2.4%

NOxEISM = 0.04782 × OPR1.8388

RMSE = 4.2%

NOxEIAll = 0.03856 × OPR1.9058

RMSE = 3.9%

The best of the small engines’ gaseous emissions, albeit at lower takeoff pressure ratios, were shown to be very competitive with the best of medium and large size engines.

Axially-staged combustion with partially premixed jets in crossflow was identified as a promising concept to pursue for the (N+3) technology mixers.

Copyright © 2013 by ASME



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