Patent ID: 7753677

Claim:
A burner, comprising: a means for providing a flow of compressed air and/or oxygen in a flow direction through a channel; a means for creating a mixture in the channel, the mixture comprising the flow of compressed air and/or oxygen and a fuel, the means for creating a mixture comprising fuel discharge openings arranged to create a concentration distribution of fuel within the mixture that is not constant across a distance defined along a length of a first axis which is oriented perpendicular to the flow direction in order to avoid combustion instabilities during operation of the burner; and a means for imparting a swirl to the mixture in the channel about the flow direction, the means for imparting swirl comprising a redirecting surface for redirecting the flow, wherein an outflow angle of the swirled mixture at a redirecting surface downstream end varies in magnitude in a single direction along a length of a second axis perpendicular to the flow direction.