摘要:
A fuel injector for a gas turbine engine combustion chamber is disclosed. The fuel injector includes a first fuel supply line for running at idle speed, a second, main, fuel supply line for running at speeds up to full throttle, and first and second injection orifices with which the two fuel supply lines respectively communicate. The injection orifices are arranged in a ring and the first orifices occupy a sector of the ring.
摘要:
A device for injecting a mixture of air and fuel into a combustion chamber of a turbomachine is disclosed. The injection device has symmetry of revolution about an axis and includes radial swirl inducers of outside diameter D2, a bowl spaced axially from the radial swirl inducers, and a support ring for supporting the injection device, which is arranged around the bowl. The bowl has a cylindrical wall extended by a flared wall, the flared wall being provided with air intake holes. The support ring includes a first cylindrical portion of outside diameter D3, connected to a second cylindrical portion of outside diameter D4 spaced axially from the first cylindrical portion, the first cylindrical portion being connected to the cylindrical wall of the bowl by a plurality of support tabs.
摘要:
The invention relates to the field of turbomachines and an injection device (10) for injecting a mixture of air and fuel into a combustion chamber (4) of a turbomachine (1). It is more specifically concerned with an injection device (10) equipped with two fuel circuits and relates to a novel Venturi (50) the shape of which improves the carburation.
摘要:
The invention relates to an arrangement for a turbomachine combustion chamber, comprising a chamber end wall pierced by at least one substantially circular opening, a deflector mounted from the downstream side of the chamber end wall in the opening by means of an annulus, an injector system associated with the opening and including an annular bowl that is flared downstream, passing through said opening, and means enabling the injector system to shift off-center relative to the chamber end wall, the deflector including an annular collar extending radially inwards, and the bowl of the injector system including at its downstream end an outwardly-open annular groove radially in alignment with the collar of the deflector in such a manner as to enable it to retract into said groove in the event of the injector system shifting off-center relative to the chamber end wall.
摘要:
The invention relates to an annular combustion chamber of a turbomachine having an end wall and side walls (3) extending longitudinally from the end wall, situated at the upstream end (M) of the chamber (1), to an orifice for discharging a stream of combustion gases, situated at the downstream end (V) of the chamber (1), the side walls (3) comprising at least one row of openings (30) for the intake of air for diluting the stream of combustion gases.According to the invention, at least one dilution opening (30) has an upstream edge which projects toward the inside of the chamber (1) and a downstream edge which projects toward the outside of the chamber (1) and is asymmetric to the upstream edge with respect to a plane extending transversely to the wall (3), the aperture of the opening (30) having an axis oriented in an oblique direction with respect to the wall (3), this direction being oriented toward the inside (1) and toward the downstream end (V) of the chamber.
摘要:
An improved dual-head combustion chamber is disclosed having a generally annular configuration extending about a central axis with a low power head, operating during low power engine conditions and a radially displaced high power head operative under high power engine operating conditions. The low power head has N number of fuel/air injector assemblies arranged in an annular array and spaced apart in a circumferential direction about the central axis. The fuel/air injector assemblies of the low power head have an air permeability of P1. The high power head also is arranged in a generally annular array with N number of first fuel/air injector assemblies and N number of second fuel/air injector assemblies with each of the second fuel/air injector assemblies aligned with a fuel/air injector assembly of the low power head along a radius line extending from the central axis. The second fuel/air injector assemblies have an air permeability of P2 such that P2 is greater than P1 and supply a fuel/air mixture to the combustion chamber during high power operation. The first fuel/air injector assemblies located in the high power head are located circumferentially spaced between adjacent second fuel/air injector assemblies. The first fuel/air injector assemblies have an air permeability of P1 and supply fuel/air mixture to the combustion chamber during low power operation.
摘要:
An annular combustion chamber for a turbine engine is provided. The chamber includes an annular row of fuel injectors including heads engaged in fuel injection systems mounted in openings in the chamber end wall. Each injector head includes at least one fuel-passing helical channel for causing fuel to rotate about the longitudinal axis of the head. Each injection system includes at least one swirler including air-passing channels of sections with axes that are inclined relative to the plurality axis of the swirler at an angle that is substantially equal to a helix angle of the helical channel, to within ±10°, and are oriented in a same direction as the channel about the longitudinal axis of the swirler.
摘要:
A combustion chamber for a turbomachine, including two coaxial walls including air inlets, each of which is configured such that its orthogonal projection, in a plane passing through the axis of the injection system closest to the inlet and perpendicular to an axial plane passing through this axis and through the axis of the combustion chamber, has an upstream edge of convex shape when seen from downstream.
摘要:
A turbomachine combustion chamber in which a chamber end wall presents an opening for receiving a pre-vaporization bowl, and including a device for injecting air and fuel mounted on the axis thereof, the bowl being floatingly mounted relative to the chamber end wall to move in a predetermined radial direction and flaring downstream so as to form a collar, a deflector forming a thermal shield being made integrally with the bowl beside the chamber end wall so that the floating movement of the bowl-and-deflector assembly takes place in a sliding plane situated between the deflector and the chamber end wall.
摘要:
A turbomachine including an annular combustion chamber, a sectorized turbine nozzle arranged at an outlet from the chamber, and a sealing mechanism interposed axially between the chamber and the nozzle, the sealing mechanism including an annular gasket that is axially resilient. The gasket includes a first axial bearing mechanism for bearing against a downstream end of the chamber and a downstream annular lip that is sectorized, each sector of the downstream lip being in alignment with a sector of the nozzle and including a second axial bearing mechanism for bearing against an upstream end of the nozzle sector.