Abstract
The established emission standards for aircraft engines require the development of low emission combustors which incorporate new concepts of fuel prevaporization and pre-mixing systems. At MTU-Muenchen a fuel injection system was designed which greatly suppresses droplet combustion and avoids burning at stoichiometric air fuel ratios. Thereby the large quantities of NO produced at adiabatic peak temperatures are omitted and soot formation as a result of low velocity droplet combustion is avoided. Tests with a combustor incorporating the fuel injection system yielded high combustion efficiencies, improved combustor outlet temperature distributions and low pollutant emissions. Comparing the measured emission indices for CO, NO, and unburned HC with values required for civil aircraft engines showed a promising development potential of achieving the standards.
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