PRE-MIX COMBUSTION SYSTEM FOR A GAS TURBINE AND METHOD OF OPERATING THE SAME

摘要

A gas turbine pre-mix combustion system is provided which comprises:
- at least one combustor (1) with a combustor wall (3) which partly surrounds a combustion zone (5);
- at least one mixing duct (9) including an air passage which leads to an outlet opening (11) being open towards the combustion zone (5); and
- one or more fuel injection openings (17) leading into the air passage and connecting it to one or more fuel supply passages (13) so as to allow the injection of fuel into air flowing through the air passage (21).
The locations of at least two outlet openings (11) or at least two sections of a single outlet opening and the orientation of downstream sections of the respective air passages (21) are chosen such that fuel/air mixtures flowing out of the outlet openings (11) or said sections of a single outlet opening show opposed flow paths so as to impinge on each other in the combustion zone (5).