Abstract:
A combustor has a trailing edge duct (110) that has cooling features located at various locations. The cooling features comprise pockets (125) that have pocket channels (127) which extend from the pockets (125) to seam locations on the main duct portion (112). Additional cooling features comprise slots (132) located proximate to the pockets (125) and the trim line (131) at a distal end of the main duct portion (112). In other embodiments, cooling channels (136a, 136b, 136c) are formed on the mating surfaces (135) of the extension flange (115). Further in other embodiments, cooling features may be found in the trailing edge (120) of the trailing edge duct (110).
Abstract:
Die Erfindung betrifft eine Gasturbinenbrennkammer mit einer Brennstoffdüse umfassend ein zylindrisches Düsenrohr (1), in welches ein Fluid eingeströmt wird, und ein stromabwärts des Düsenrohrs (1) angeordneter konvex ausgebildeter Düsendeckel (2) mit einem Mittelpunkt (3), wobei der Düsendeckel (2) mehrere Durchlassöffnungen (4a, 4b) aufweist, durch welche das in das Düsenrohr (1) eingeströmte Fluid austritt, wobei die Durchlassöffnungen (4a, 4b) auf zumindest zwei Kreislinien (5a, 5b) mit unterschiedlichen radialen Abstand (R1, R2) zum Mittelpunkt (3) angeordnet sind.
Abstract:
A cooling channel arrangement for a region of a gas turbine engine is provided. The arrangement includes a cooling channel 26 having cooling sections 34, 36, 38 adapted for use in a component 24 with various component regions 28, 30, 32, with some sections having cooling flux mitigation adaptations to overcome the effects of increased temperature in the component regions to maintain efficient cooling effectiveness throughout the cooling channel sections. Adaptations may include regions of cross sectional area that increases heat transfer effectiveness, as well as regions characterized by an increase in lateral flow compared to longitudinal flow.
Abstract:
A gas turbine engine component (10), having: a base layer (60) including an array (110) of pockets (52) separated by raised ribs (36), and a film cooling hole (70) through the base layer in each pocket; and a cover sheet (62) diffusion bonded to the raised ribs and including an impingement hole (72) for each pocket of the array of pockets. The raised ribs include a thickness (104) that is less than half of a smallest dimension (96) of the pocket. The component is configured to receive combustion gases from a combustor and accelerate and deliver the combustion gases onto a first row of turbine blades without a turning vane.
Abstract:
An improved gas turbine combustion system having a reduced combustion residence time in a combustion turbine engine is provided. The combustion system includes a flow-accelerating structure (16, 51), such as a transition duct, having an inlet (26) and an outlet (28). The inlet (26) of the flow-accelerating structure () is fluidly coupled to receive a flow of combustion gases from a combustor outlet. At least one fuel injector (32, 64, 66) is disposed between the inlet (26) and the outlet (28) of the flow-accelerating structure (16, 51). The flow-accelerating structure (16, 51) causes an increasing speed to the flow of combustion gases, and, as a result, the flow of combustion gases in the flow-accelerating structure (16, 51) experiences a decreased static temperature and a reduced combustion residence time, each of which is effective to reduce NOx emissions at the high firing temperatures of the turbine engine.
Abstract:
A gas turbine engine has a converging duct (10) that has combustion products flow at low mach speeds through a first portion (14) and a high mach speeds through a second portion (15). The converging duct (10) has two types of cooling schemes formed. One type of cooling scheme is beneficial for the low mach speed combustion product flow and one type of cooling scheme is beneficial for the high mach speed combustion product flow. The two cooling schemes are blended together in order increase the efficiency of the cooling of the converging duct (10).
Abstract:
A pilot fuel nozzle (10) for a gas turbine combustor includes an igniter (20) forming a central body (19) extending along a longitudinal center of the nozzle (10). A nozzle tip (18) includes a plurality of circumferentially spaced fuel passages (32) and a plurality of circumferentially spaced air passages (54) extending to an outer side of the nozzle tip (18). The central body (19) extends through a center of the nozzle tip (18) for producing a spark to ignite a fuel/ air mixture adjacent to the nozzle tip (18). A plurality of eventually spiral fuel tubes (32) extend along the central body (19), each of the fuel tubes (32) having an outlet end (38) engaged on the nozzle tip (18) for delivery of fuel from the nozzle tip (18) into a combustion chamber. An outer sleeve (16) surrounds the fuel tubes (32) and defines an annular space (52) in fluid communication with the air passages (54) of the nozzle tip (18) between the outer sleeve (16) and the central body (19). The outer sleeve (16) may further include an annular diffusion passage (72), and an annular premix passage (74) for additional or alternative fuel supply.
Abstract:
A combustion system in a combustion turbine engine is provided. The system may include a combustor wall (40) fluidly coupled to receive a cross-flow of combustion products (21). The combustor wall (40) may include a plurality of cooling air conduits (46). An injector assembly (12) may be in fluid communication with the cooling fluid conduits (46) to receive cooling fluid that passes through the cooling fluid conduits. Injector assembly (12) includes means for injecting (24, 25, 26) a flow of the cooling fluid (22) into the combustion stage. The flow of the cooling fluid may be arranged to condition interaction of a flow of reactants (19) injected to admix with the cross-flow of combustion products.
Abstract:
A gas engine turbine has a trailing edge duct (110) that is used for the transition duct. The trailing edge duct (110) has an extension flange (115) located at its outlet (117). The extension flange (115) has a contoured receiving section (134a, 134b, 134c) and a contoured insertion section (135a, 135b, 135c) that is connected to another trailing edge duct in order to form contoured connections (136a, 136b, 136c). The contoured receiving sections (134a, 134b, 134c) may be parabolic shaped, serrated or a combination of both parabolic shaped and serrated.
Abstract:
A transition duct exit frame (10) for supporting a transition duct (12) extending downstream from a combustor (14) to a turbine assembly (16) in a gas turbine engine (18) and including one or more transition duct exit frame inserts (20) configured to reduce thermal distortion created during operation of the gas turbine engine (18) is disclosed. The transition duct exit frame (10) is formed from one or more transition duct exit frame bodies (22). The transition duct exit frame body (22) is formed from a first material having a first coefficient of thermal expansion. The transition duct exit frame insert (20) forms at least a portion of the transition duct exit frame body. The transition duct exit frame insert (20) is formed from a second material (26) having a second coefficient of thermal expansion that is different than the first coefficient of thermal expansion of the first material (24) to reduce distortion within the transition duct exit frame body (22) during operation of the gas turbine engine (18).