Ultra-Lean Combustion at High Inlet Temperatures

Combustion at inlet air temperatures of 1100 to 1250 K was studied for application to advanced automotive gas turbine engines. Number 2 diesel fuels was injected. Unburned hydrocarbons emissions were negligible. Nitrogen oxides emissions were less than 1.9 g NC/2/kg fuel for combustion temperatures below 1680 K. Carbon monoxide emissions were less than 16 g CO/kg fuel for combustion temperatures greater than 1600 K, inlet-air temperatures higher than 1150 K, and residence times greater than 4.3 ms.