Abstract:
A burner (1) with a longitudinal burner axis (2) and at least a mixing channel (3, 4), formed in an annular manner around the longitudinal burner axis (2), for the mixing of fuel and air. Each mixing channel is bounded radially on the inside by a channel hub (5, 6) and radially on the outside by a channel outer wall (7, 8). A fuel concentration distribution in the mixing channel (3, 4) from the channel hub (5, 6) to the channel outer wall (7, 8) being adjustable by adjusting the introduction of fuel to provide an adjustable fuel concentration distribution at respective radial locations across each mixing channel. Also a combustion system with said burner (1) and a method for operating said burner (1).
Abstract:
The invention relates to a burner arrangement (1) for a combustion chamber, in particular a gas turbine combustion chamber, for burning fluidic fuels, having a main burner (2) and a pilot burner (3), arranged centrally therein, which serves to ignite and/or stabilize the combustion of the main burner (2), the main burner (2) comprising a first annular air duct (4) for supplying combustion air (5) and first fuel nozzles (6) for injecting a fuel (7) into the first annular air duct (4), the pilot burner (3) comprising a second annular air duct (8) for supplying combustion air (5) and second fuel nozzles (9) for injecting a fuel (7) into the second annular air duct (8), wherein the second fuel nozzles (9) are provided as first and second fuel stages (10, 11).
Abstract:
Die Erfindung betrifft einen Brenner (1) mit einem im Querschnitt im Wesentlichen ringförmigen, im Betrieb von Luft und Brennstoff durchströmten Luftzufuhr-und-Vormischkanal (4), der durch einen Außenmantel (5) und eine Nabe (6) gebildet ist und in dem mehrere Drallschaufeln (7) angeordnet sind, die sich von der Nabe (6) bis zum Außenmantel (7) in radialer Richtung erstrecken und eine Umlenkfläche (11) aufweisen, wobei in einem radialen Außenbereich der Drallschaufeln (7) ein Abströmwinkel (α) zu einer Hauptströmungsrichtung (13) an einem Abströmende (12) der Umlenkfläche (11) in radialer Richtung mindestens einmal zu- und einmal abnimmt.
Abstract:
The present application provides a fuel nozzle (250) for use in a gas turbine. The fuel nozzle may include a mounting flange (260), a number of premixers (300) attached to each other, and a number of gas pathways (290) extending from the mounting flange to the number of premixers.
Abstract:
The invention relates to a swirler (1) for mixing fuel and air, comprising a plurality of vanes (2) arranged on a reference circle diameter which, together with a first longitudinal end face (3) of the vanes (2) disposed on a first wall and a second wall (6) disposed on an opposing second longitudinal end face (4) of the vanes (2), form a flow channel. In this arrangement at least one injection orifice (8) in the first wall (5) and at least one further injection orifice in the second wall (6) open into a flow channel (7). The arrangement of the at least two mutually opposing injection orifices in the wall of the swirler makes for a homogeneous distribution of the fuel in the flow channel (7) and consequently ensures a uniform mixing of the air with the fuel. This results in uniform and low-NOx combustion of the fuel/air mixture in a burner.
Abstract:
Es wird ein Verfahren zum Betrieb eines Vormischbrenners (1) vorgestellt. Der Vormischbrenner (1) umfasst eine Vormischzone (2). In die Vormischzone (2) kann ein Luftmassenstrom (5) und Brennstoff (6) eingedüst werden, wobei sich ein potentielles Heissgasrückströmgebiet (8) ausbilden kann. Das erfindungsgemässe Verfahren ist dadurch gekennzeichnet, dass ein nicht brennstoffhaltiges Fluid (15) stromabwärts zur Brennstoffeindüsung in die Vormischzone (2) eingedüst wird.
Abstract:
Disclosed is a swirler vane (15) for mixing fuel and air, with a through hole (19) connecting at least two surfaces (20) of the swirler vane (15) for providing a connecting path for a fuel/air mixture (7) to pass from a high pressure side of the swirler vane (15) to a low pressure side.
Abstract:
A combustor nozzle (72) is provided. The combustor nozzle includes a first fuel system (74) configured to introduce a syngas fuel into a combustion chamber to enable lean premixed combustion within the combustion chamber and a second fuel system (76) configured to introduce the syngas fuel, or a hydrocarbon fuel, or diluents, or combinations thereof into the combustion chamber to enable diffusion combustion within the combustion chamber.
Abstract:
A burner, in particular a gas turbine burner, comprises: - at least one swirler (2), the swirler (2) having at least one air inlet opening (16), at least one air outlet opening (18) positioned downstream to the air inlet opening (16) and at least one swirler air passage (14) extending from the at least one air inlet opening (16) to the at least one air outlet opening (18) which is delimited by swirler air passage walls (20, 22, 120); - a fuel injection system which comprises fuel injection openings (26) arranged in at least one swirler air passage wall (20, 120) so as to inject fuel into the swirler air passage (14) ; and - an air injection system which comprises air injection openings arranged in at least one swirler air passage wall and positioned downstream of the fuel injection openings for injecting air into the swirler air passage.