Mixture Preparation Effects on Distributed Combustion for Gas Turbine Application - Novel Combustion Concepts for Sustainable Energy Development - page 277

Fig. 1 A schematic diagram of different fuel introduction scenarios, end cross-sectional view at
middle location of the combustor a configuration “ PR ” b configuration “ CA ” c configuration

“ NPO ” d configuration “ NPI ”

between 2 and 3.7 depending on the equivalence ratio. The higher cross stream jet
momentum (or the lower the jet momentum ratio) is expected to signi cantly

enhance the mixing process and also affect the turbulence in this region.
The inlet air temperature was preheated, using an electric air heater, to 600 K to
simulate the average air temperature at the gas turbine compressor outlet. The
preheating of the inlet air has been shown to affect the combustion kinetics and
pollutants emission of this combustor (Khalil and Gupta 2011b ). In general, the
higher the air inlet temperature, the higher the fl flame temperature will be. Such high

fl flame temperatures will affect the formation of pollutants, especially NO x and CO.

2.1 The Test Facility

The combustion chamber under investigation is a cylindrical chamber where air is
injected tangentially at half the height of the chamber for all the cases reported here.
Fuel is also injected at the same plane as that of air injection. The product gas exit