A mapping device maps each burner mode at various bleed settings to
generate control schedules for a combustion controller that ensure
combustion dynamic (acoustic) pressures, and emissions limits and ring
flame temperatures are within operational limits. In general, a method of
combustor mapping involves adjusting the bulk ring flame temperature to
meet emissions and acoustic requirements. The dome (ring) ring flame
temperature is then adjusted to determine maximum and minimum ring flame
temperature boundary limits. At both the maximum and minimum ring flame
temperatures, the emissions levels and acoustic pressures are checked to
see that they are within specification limits. If they are not, the bulk
ring flame temperature is adjusted, and the entire process is repeated
for that bleed setting and burner mode. If the emissions levels and
acoustic pressures are within specification limits, then the power is
increased to a different mode and bleed setting combination, and the
process is again repeated. During each of these steps, mapping data are
recorded.