Fuel feed unit to the bypass turbojet engine afterburner

FIELD: engines and pumps.

SUBSTANCE: fuel feed unit to the afterburner of the bypass turbojet engine contains a fuel manifolds with the fuel feed fittings. The fuel manifolds are formed all-in-one with the housing, which by means of fixing elements is connected to the upper diffuser cowl and with the upper ring flame stabiliser fastener. At that the mentioned housing in the cross-section plane has a rectangular shape, and the fuel manifolds are made in the form of a ring.

EFFECT: reduction of the full pressure loss in the afterburner flow section, thrust augmentation and reduction of coke formation in the fuel manifolds.

3 cl, 3 dwg

 



 

Same patents:

FIELD: engines and pumps.

SUBSTANCE: this combustion chamber has wall and vent channel rigidly jointed therewith. Said vent channel makes the spark plug seat exposed to said combustion chamber. Spark plug guide is arranged in said vent channel to displace across channel axis and incorporates plug guide cylindrical section and control collar fitted in the thrust sliding over vent channel stop surface. Spark plug guide incorporates cooling chamber with air feed holes for chamber cooling. Cooling chamber is configured to allow cooling by affecting the spark plug wall arranged at plug guide. Note here that said cooling chamber is arranged between cylindrical wall guide section and combustion chamber and has cylindrical wall cooling section made between cylindrical wall guide section and sealing collar.

EFFECT: optimum cooling irrespective of aircraft flight phase and difference in thermal conditions between combustion chamber and crankcase.

4 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: centrifugal nozzle contains a ring casing with limiting walls, having input area and output area in direction of the main flow, at least two blades located in the ring-shaped casing. Each blade has streamlined profile of the cross-section that passes at right angle to the longitudinal direction or with slope towards the main flow direction prevailing in the centrifugal nozzle. The lead edge area of each blade has profile that is oriented parallel with the main flow direction prevailing at the lead edge. The blade profiles are turned relatively to the main flow direction prevailing on the lead edge to provided the flow vortex. In relation to the central plane of the blades the rear edges have at least two projecting parts that alternatively continue from the central plane in opposite transverse direction. Besides, invention relates to the work method of such torch.

EFFECT: invention ensures high effective centrifugal torch with low pressure drop.

25 cl, 14 dwg

FIELD: engines and pumps.

SUBSTANCE: fuel injection device for the ring combustion chamber of the turbo-machine contains a control loop constantly feeding the injector with the outlet to the first Venturi tube, and a multipoint loop. The multipoint loop periodically feeds injected holes made on a frontal surface of the forward ring chamber of the second Venturi tube, coaxial to the first Venturi tube and enclosing it. The ring rim is mounted in the ring chamber to form in it of the loop for fuel supply to the injection holes, and cooling loop by means of passing of fuel supplied to the injector of the control loop. The cooling loop passes along the frontal surface of the chamber in the immediate proximity from the injection holes.

EFFECT: invention is aimed at minimizing of coking of fuel circulating at the level of the frontal plane of the ring chamber.

12 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: fuel injection device for annular combustion chamber of turbo-machine comprises the primary system continuously feeding the injector, opening into the first Venturi tube, and multipoint system discontinuously feeding the injector holes. The injector holes are made on a frontal surface of the ring rim installed in the annular chamber, second tube, formed upstream the second Venturi tube, coaxially with reference to the first Venturi tube and enclosing the latter. The fuel injection device comprises the thermal isolation of frontal surface of the ring rim with an annular cavity, formed around injector holes between the frontal surface of the ring rim and the frontal wall of the annular chamber and intended for filling during operation with air or coked fuel.

EFFECT: invention is aimed at simplification of the fuel injection device with simultaneous improvement of its profitability and efficiency.

11 cl, 9 dwg

FIELD: power industry.

SUBSTANCE: burner is provided with a central fuel feed layout and an annular air duct enclosing the central fuel feed layout for supply of combustion air and with vortex vanes located in the annular air duct and having the first gas atomisers for spraying of gaseous fuel to the combustion air and the second gas atomisers for spraying of gaseous fuel to the combustion air. The first gas atomisers are fed from the first annular gas-distributing duct in the fuel feed layout. The second gas atomisers are fed from the second annular gas-distributing duct in the fuel feed layout. The first annular gas-distributing duct and the second annular gas-distributing duct are equipped with combustible gas from a common gas feed pipe located with an offset towards the pilot burner located in the centre and near and parallel to it and having the first gas feed duct and the second gas feed duct. The first gas feed duct is connected to the first gas-distributing duct and the second gas feed duct is connected to the second gas-distributing duct.

EFFECT: invention is aimed at implementation of possible feeding of combustible gas to the second gas outlet duct without any sufficient change of an external profile of a central fuel feed layout.

15 cl, 8 dwg

FIELD: heating.

SUBSTANCE: fuel tube for a burner, and namely for a gas turbine burner, includes an end that has a surface for nozzles, as well as at least two fuel nozzles. The surface for the nozzles is equipped with splines between the fuel nozzles and is made in the form of an annular conical surface. The splines pass through the above surface perpendicular to the circumferential direction of the annular surface. The end is made in the form of a flattened cone. The side surface of the flattened cone forms the surface for the nozzles.

EFFECT: invention is aimed at increasing the nozzle service life.

7 cl, 3 dwg

FIELD: power industry.

SUBSTANCE: method of burner use, comprising an axis and at least one jet nozzle is proposed. One jet nozzle includes centre axis, exit and wall facing to the burner axis in the radial direction starting from the centre axle. The mass flow of fluid medium including fuel, flows through at least one jet nozzle to its outlet. At outlet of jet nozzle between the mass flow of liquid medium activating the fuel and wall facing to burner axis, air film or inert gas is created due to the fact that air or inert gas is injected along the wall facing towards the burner axis at least into one jet nozzle. Another object of the present invention is burner, comprising axis and at least one jet nozzle. One jet nozzle includes centre axis and wall portion extending around the centre axis in the angular range maximum from -135 to +135, and at least from -15 to +15 relative to the radial connecting line between the burner axis and central axis. Exceptionally wall portion extending around the centre axis in the angular range of maximum from -135 to +135 and at least from -15 to +15, includes at least one flow channel for supplying air or inert gas inflowing to jet nozzle. Gas turbine comprising one burner described above is also a subject of invention.

EFFECT: invention permits to optimise the use of air films or films of inert gas for operation of jet burner.

16 cl, 13 dwg

FIELD: power industry.

SUBSTANCE: invention relates to power industry. Burner facility (20) for furnace device for burning liquid fuel mediums and/or inert materials, in particular of liquid fuel and/or furnace gas, besides the following is provided for each fuel type and/or inert substance: at least one mean (1, 2, 8, 9, 12, 13, 16) for supplying medium, mean (3, 4) for supplying air and mean for mixing the medium with air, designed as a stationary blade creating a twist (6, 7), which are formed in the walls of connected metal body of burner, wherein at least one mean (9, 13, 16) for supplying the medium is separated from adjacent zones of burner body along the corresponding separating wall by means of at least one intermediate cavity (33, 43 ) made in the form of recess, so that heat exchange between adjacent zones of the burner body, in particular between the adjacent means (9, 13, 16) for supplying medium is reduced in the zones made in the form of recess of intermediate cavity (33, 43). At least two means (9, 13, 16) for supplying medium are formed as separate attached to each other modular blocks (30, 40, 50) which are connected to each other via the connecting mean next but one, located at least unilaterally contact stud (32, 42) of cross-sectional surface intended for this purpose, wherein the contact stud (32, 42) at least partially covers the intermediate cavity (33, 43) designed in the form of recess.

EFFECT: invention permits to improve the operational reliability of the burner.

13 cl, 5 dwg

FIELD: engines and pumps.

SUBSTANCE: injector unit of gas-turbine engine combustion chamber includes a plate of annular shape with injector modules installed on it in several rows, and a primary fuel collector connected to the plate, collector cavity being connected to fuel channels with injector modules. Injector modules are installed with register ledges inserted into the blind holes made in the plate and provided with mixing chambers of frustum-of-a-cone shape. All the injector modules have central fuel channel. Tangential air swirlers are made between the housing and the central body in the form of inclined blades. The central fuel channel is made blind with inserted tangential holes. Injector modules in rows are installed on the plate in staggered order.

EFFECT: improving fuel combustion completion at all the modes, reducing harmful emissions and providing uniform temperature field at combustion chamber outlet.

5 dwg

FIELD: engines and pumps.

SUBSTANCE: injector unit of gas-turbine engine combustion chamber includes a plate of annular shape with injector modules installed on it in several rows containing fuel and air channels, and a fuel collector connected to the plate, collector cavity being connected to fuel channels with injector modules. Over three concentric rows of injector modules are installed, the modules are installed with register ledge inserted into blind hole made in the plate. The plate is designed convex towards air flow.

EFFECT: invention is meant for improvement of fuel combustion completion, reduction of harmful emissions at all the modes and provision of uniform temperature field at combustion chamber outlet in a circumferential direction at all the modes.

4 cl, 6 dwg

FIELD: gas-turbine plants.

SUBSTANCE: proposed method includes changing of fuel rate depending on power by metering out delivery of fuel into manifolds of coaxially installed pilot and main burners of burner assemblies with preliminary mixing of fuel and air. Burner assemblies are installed in two tiers, and fuel is delivered into burners of both tiers. At starting fuel is fed into manifold of pilot burners of outer tier and before idling, into manifold of pilot, burners of inner tier. At idling amount of fuel fed into pilot burners of outer and inner tiers is maintained equal. Then fuel delivery into pilot burners of outer and inner tiers is increased. Prior to operation under no-load conditions fuel is fed to main burners of outer and inner tiers. In the range from no-load to rated load, fuel delivery into main burners is increased with simultaneously decreasing relative portion of fuel fed through pilot burners. Invention provides reduction of content of nitrogen oxides NOxin exhaust gases of gas-turbine plant.

EFFECT: provision of stable burning of lean mixtures under any operating conditions.

4 cl, 2 dwg

FIELD: gas-turbine engines.

SUBSTANCE: proposed fuel-air burner has fuel injector in the form of body with fuel feed and spray holes as well as axial- and tangential-flow air swirlers, air flow regulator disposed between rear side of injector body and inlet end of axial-flow swirler that forms slit duct together with its inlet end. Axial- and tangential-flow air swirlers are made in the form of open-end channels accommodating blades and each is provided with converging-diverging nozzle having internal and external channel walls. External channel wall of converging part of axial-flow swirler nozzle has curvature inverse relative to internal channel wall of tangential-flow swirler nozzle. Diverging part of axial-flow swirler is made in the form of cone whose vertex is disposed upstream of nozzle critical section. Angle between burner axis and generating line of cone is 30 to 90 deg. Critical section of axial-flow swirler converging-diverging nozzle is disposed upstream of point of intersection between external channel wall and fuel spray cone generating line.

EFFECT: reduced emission of pollutants in exhaust gases, improved starting characteristics and fuel economic efficiency, enhanced reliability of combustion chamber.

1 cl, 2 dwg

FIELD: mechanical engineering; gas-turbine engines.

SUBSTANCE: proposed gas-turbine engine has central stage arranged in gas duct of engine from its part arranged higher relative to direction of main gas flow to part lower in direction of main gas flow and provided with exhaust gas cone forming device in direction of main gas flow, and guide arrangement. Gas-turbine engine has group of blades, group of fuel nozzles and group of igniters. Guide arrangement is located in zone of edge of exhaust gas cone-forming device arranged higher relative to direction of main gas flow. Group of blades is located in gas duct out of the limits of central stage. Blades are provided with atomizing guides extending through blades. Fuel nozzles are installed on inner ends of corresponding atomizing guides. Each nozzle is provided with input, output and passage between input and output. Passage has part arranged to direct fuel flow to first part of passage surface located across and widening downwards in direction of flow with subsequent deflection fuel flow by first part of surface and its outlet from nozzle. Igniters are arranged in corresponding atomizing guides for igniting fuel from corresponding fuel nozzle.

EFFECT: provision of reliable lighting up in afterburner, improved recirculation of fuel in flow.

13 cl, 8 dwg

FIELD: fuel systems.

SUBSTANCE: the fuel-injection nozzle for a turbo-machine combustion chamber outfitted with two fuel-injection nozzle units has the first fuel-supply tube, connected to which is an annular nozzle end for injection of primary fuel into the combustion chamber, the second fuel-supply tube that envelops the mentioned first tube, and connected to which is a cylindrical extension piece for injection of secondary fuel into this combustion chamber. The extension piece has an annular groove, whose diameter exceeds the diameter of the mentioned second fuel supply tube and runs over its entire length. The third tube is provided that envelop the second tube, an connected to which is a tubular separating component introduced in the mentioned annular groove of the cylindrical extension piece in such a way that two annular cavities are formed, in which the cooling agent can circulate up to the end of the fuel-injection nozzle within 360 degrees in the whole cross-section of the mentioned cavities.

EFFECT: provided protection of the fuel systems, prevented clogging of the fuel-injection nozzles with coke due to effective cooling without considerable variations of the nozzle overall dimensions.

8 cl, 3 dwg

FIELD: fuel systems.

SUBSTANCE: the device for supply of fuel to the combustion chamber has at least one main nozzle and one preliminary-injection nozzle, pump, the first actuator valve installed in the first pipe-line connected to the preliminary-injection nozzle, the second actuator valve used for control of fuel consumption in the secondary pipe-line connected to the preliminary-injection nozzle through the first actuator valve rated at a lower consumption rate. The first pipe-line is also connected to the main nozzle for control of consumption of fuel supplied to the nozzle by the first actuator valve, provision is made for a direction- selecting valve installed past the first valve, and an intermediate line connecting the first and second lines that are used for fuel supply to the main nozzle and/or to the preliminary-injection nozzle.

EFFECT: provided stable fuel supply to the combustion chamber.

8 cl, 2 dwg

FIELD: continuous combustion chambers using liquid or gas fuel.

SUBSTANCE: fuel nozzle comprises first valve that closes when the pressure of inflowing fuel reaches a given value and second batching valve mounted at the outlet of the first valve, which is opened under the action of the second given value of fuel pressure. The second valve is open when the pressure increases so that to provide the inflow of fuel to the consumers. The batched fuel flow rate is a function of the flowing sections of the openings made at the level of the second valve. The nozzle is additionally provided with means for individual adjusting of the second threshold value of pressure made so that to provided the uniform injection of fuel to the combustion chamber.

EFFECT: expanded functional capabilities.

4 cl, 6 dwg

FIELD: continuous combustion chambers.

SUBSTANCE: combustion chamber comprises hollow cylindrical housing whose wall receive scroll and air radial swirlers with blades that provide swirling in opposite directions, shells, bushings mounted for permitting movement in radial direction, branch pipe, swirling chambers, and nozzle. Each combined nozzle has centrifugal nozzle whose outer side is in a contact with inner side of the bushing and jet nozzle with cylindrical housing mounted coaxially in the inner space of the branch pipe between the outer wall of the housing of the jet nozzle and inner wall of the branch pipe. The outlet section of the housing of the jet nozzle is bent to the passage of the scroll spiral of the radial swirler. The outlet section of the jet nozzle is parallel to the wall of the inlet section of the branch pipe and is at a distance of 0.8-1.2 of the diameter of the jet nozzle housing from it.

EFFECT: reduced hydraulic drag and oxides emission.

9 dwg

FIELD: engine engineering.

SUBSTANCE: method comprises filling with solder the radial spaces made in the ring nozzle tip provided with the first nozzle openings for injecting primary fuel and in the cylindrical nozzle that embraces the ring nozzle tip and has second nozzle openings for injecting secondary fuel, setting the ring nozzle tip inside the cylindrical nozzle, mounting both of the members on the first fuel supply pipe for primary fuel and second fuel supply pipe for secondary fuel that embraces the first pipe and on the outer wall of the fuel nozzle, and setting the nozzle spryer assembled into the chamber where it is heated to provide adhesion of the members with solder.

EFFECT: expanded functional capabilities and eased assembling.

6 cl, 7 dwg

FIELD: gas-turbine engine engineering.

SUBSTANCE: ring combustion chamber comprises fire tube and vortex burners arranged over periphery of its face and made of fuel-air scroll and air swirlers with outlet conical branch pipe having cylindrical section. The shell is secured to the face coaxially to each branch pipe defining a ring space. The outer side of the end cylindrical section or inner side of the shell located above it is provided with longitudinal ribs distributed uniformly over periphery and defining insulated passages. The through openings connected with the ring space are made in the face of the fire tube under the shell.

EFFECT: enhanced reliability and expanded functional capabilities.

2 cl, 2 dwg

FIELD: gas-turbine engine engineering.

SUBSTANCE: method comprises separating the fuel supply through small fuel nozzle from that through high-flow rate nozzle, with controllable fuel supply realized directly in the device. The device comprises outer housing, high-flow rate nozzle made of outer housing of the small fuel nozzle and secured to it, piston-slide valve, and spring, interposed between the outer housings of the device and high-flow rate nozzles provided with the passages for fuel supply. The fuel supply is controller by opening passages for supplying fuel to the small nozzle and closing the passages for supplying fuel to the high-flow rate nozzle. When the pressure of fuel increases, the passages for supplying fuel to the high-flow rate nozzle are opened, and the passages for supplying fuel to the small nozzle are simultaneously closed.

EFFECT: enhanced efficiency.

2 cl, 5 dwg

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