The application of fluidics to control emissions from gas turbine combustors
Abstract
Emission characteristics of gas turbine engines are studied in an investigation of a method to reduce the levels of nitric oxides, carbon monoxide, and hydrocarbons. It is shown that if the percentage of air to primary zone varies between 38% at full power and 27% at idle, then the minimum possible levels of emissions are achieved. The method under investigation applies fluidic systems as a control technique to produce such changes in air flow characteristics. Tests show that the factors which exert the greatest influence upon the pre-combustor diffuser are the geometry of the vortex and the rate of mass flow-bleed from the vortex chamber, and the desired air flow distribution can be achieved using 6% air-bleed at the idle, which does not affect the low power level required at this mode.
- Publication:
-
Fluid Mechanics of Combustion Systems
- Pub Date:
- 1981
- Bibcode:
- 1981fmcs.proc..233R
- Keywords:
-
- Air Flow;
- Combustion Chambers;
- Exhaust Emission;
- Flame Temperature;
- Fluidics;
- Gas Turbine Engines;
- Pollution Control;
- Carbon Monoxide;
- Design Analysis;
- Hydrocarbons;
- Nitric Oxide;
- Temperature Control;
- Vortices;
- Fluid Mechanics and Heat Transfer