Abstract:
The invention is based on a gas-turbine burner (2, 44) having a plurality of main swirl generators (10) which each have an inlet-flow opening (28) formed by a main swirl generator edge (30). In order to achieve a uniform flow of combustion air through the main swirl generator (10), it is proposed that the gas-turbine burner (2, 44) have an inlet-flow guide means (36, 38, 46) with a flow guide surface (40, 48) which runs from one of the inlet-flow openings (28) to an adjacent inlet-flow opening (28), to which the main swirl generator edges (30) which form the inlet-flow openings (28) are connected and widens from there radially upwards.
Abstract:
A method for pressure dynamics reduction within a gas turbine engine with a number of combustion chambers, where a pilot fuel spilt is defined for each combustion chamber, is provided, comprising the steps of measuring the pressure values in each combustion chamber in time steps (21), determining the pressure change rates in the combustion chambers from the measured pressure values, and reducing the pilot fuel split to a particular combustion chamber to zero (26) in case that the pressure change rate in this combustion chamber increases over two or more consecutive time steps (23) and exceeds the pressure change rate in all other combustion chambers (25) and the pressure change rate in this combustion chamber is above a maximum allowable pressure change limit (24).
Abstract:
A fuel injector head (17) for a gas turbine engine the head comprising a pilot injector (10) and a main injector located radially outwardly of the pilot injector. A concentric separates the pilot injector from the main injector and bounding a duct through which in use a fuel injected by the pilot injector flows. The splitter (25) is hollow to improve cooling and has a radially inner surface (30) which defines a first portion which tapers radially inwardly to a throat and a second portion (28) which tapers radially outwardly from the throat with, the angle of the radially outwards taper being such that a flow of air in use over the radially inner surface remains attached over the length of the surface.
Abstract:
A fuel injector (30) for a gas turbine engine (100) is disclosed. The fuel injector includes an injector housing (30a) having a longitudinal axis (98). The injector housing includes one or more fuel inlets (48, 54) one or more fuel galleries (52, 56) annularly disposed about the longitudinal axis, and an air inlet. The fuel injector also includes a premix barrel (32) having a proximal end and a distal end circumferentially disposed about the longitudinal axis. The premix barrel is fluidly coupled to the fuel galleries and the air inlet at the proximal end, and configured to mechanically couple to a combustor (50) of the gas turbine engine at the distal end. The fuel injector also includes a pilot assembly (40) disposed radially inwards of the premix barrel. The pilot assembly may include a first end and a second end. The second end is removably coupled to the injector housing, and the first end is proximate the distal end of the premix barrel. The pilot assembly is fluidly coupled to the fuel galleries, the air inlet, and the combustor.
Abstract:
A method is provided for expanding a non-swirling gaseous flow exiting a conduit into a larger chamber. The flow conduit exhibits a curved flare exiting into the chamber and a gaseous flow is passed through the conduit along with a separate pilot flow centrally located within the conduit. The pilot flow is expanded by heating thus forcing the gaseous flow outward along the flared exit.
Abstract:
Die vorliegende Erfindung betrifft einen Injektor (4) für Flüssigbrennstoff (6a) sowie einen Vormischbrenner, insbesondere für Brennkammern von Gasturbinen, der einen derartigen Injektor (4) aufweist. Der Injektor (4) umfasst eine Dralldüse (14), die von einem Schirmluftkanal (11) umgeben ist und im Bereich eines düseninternen Drallerzeugers (12) für den Flüssigbrennstoff (6a) einen vergrösserten Strömungsquerschnitt aufweist, der sich zu einer Austrittsöffnung der Dralldüse (14) wieder reduziert. Der vorliegende Injektor ermöglicht einen Betrieb des Vormischbrenners mit reduziertem Vordruck bei hoher Zerstäubungsqualität.
Abstract:
Combustion system (10) for a gas turbine equipped with a premixing chamber (12) for air which is mixed with the fuel injected from a series of holes (11) creating a main central flame which is formed in a flame tube (14), the premixing chamber (12) is convergent towards a connection end with a combustion chamber comprising the flame tube (14), the combustion system (10) comprises a series of pilot devices (20) with premixing of the fuel gas, which create a series of corresponding pilot flames suitable for stabilizing the main central flame itself, at the same time reducing the polluting emissions.
Abstract:
Die Erfindung betrifft einen Vormischbrenner (1) mit einem Hauptbrenner (3) und einem Pilotbrenner (5) zur Stabilisierung des Hauptbrenners (3). Der Pilotbrenner (5) weist ein feinporiges Brennermaterial (41) auf, durch das eine stickoxidarme und gegen Verbrennungsschwingungen unanfällige Verbrennung ermöglicht wird.