Optimalisation of the mixture of combustion gas in a gas turbine combustor

摘要

The combustion chamber is formed between outer (3) and inner (4) rings, connected by a base (5). It is fed by a series of injectors (11) spaced evenly round the base and associated with a series of air injection spirals. This causes the combustion gases to swirl about the injectors' geometrical axes. The outer and inner rings have orifices (17,18) to allow in dilution air. The two sets of orifices are offset relative to one another in an angular direction to moderate, maintain or amplify the swirling of the burned gases from the combustion zone. The orifices in the outer ring (3) are offset relative to the axes of the injectors (11) in one direction, for example, while the orifices in the inner ring (4) are offset in the opposite direction.