WO2024252095A1 - Système de régulation de carburant - Google Patents
Système de régulation de carburant Download PDFInfo
- Publication number
- WO2024252095A1 WO2024252095A1 PCT/FR2024/050721 FR2024050721W WO2024252095A1 WO 2024252095 A1 WO2024252095 A1 WO 2024252095A1 FR 2024050721 W FR2024050721 W FR 2024050721W WO 2024252095 A1 WO2024252095 A1 WO 2024252095A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat exchanger
- fuel
- circuit
- engine
- heat transfer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
- F02C7/224—Heating fuel before feeding to the burner
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D33/00—Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for
- B64D33/08—Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for of power plant cooling systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D37/00—Arrangements in connection with fuel supply for power plant
- B64D37/34—Conditioning fuel, e.g. heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
- F05D2260/213—Heat transfer, e.g. cooling by the provision of a heat exchanger within the cooling circuit
Definitions
- This presentation concerns the aeronautical field. More specifically, this presentation concerns the regulation of fuel within an aircraft engine.
- the heat transfer fluid can be any fluid circulating in the engine to cool or lubricate certain parts of the engine, such as lubricating oil or a coolant, for example a coolant for an electrical machine.
- the heat thus stored by the heat transfer fluid is discharged into the fuel sent to the combustion chamber, typically by means of a heat exchanger arranged within the fuel control system.
- the ability of the fuel to cool the heat transfer fluid depends on the temperature and flow rate of the fuel circulating within the heat exchanger.
- the Applicant is constantly working to reduce the climate impact of aircraft (minimizing greenhouse gas emissions, reducing the environmental footprint of aircraft operation), which involves improving the efficiency of electrical technologies in engines, particularly hybrid engines.
- An aim of this disclosure is to improve the heat absorption capabilities of an aircraft engine fuel control system, so as to increase the ability of the fuel to cool the heat transfer fluid.
- a fuel regulation system for an aircraft engine comprising:
- a pump comprising an inlet port and a discharge port, the inlet port being adapted to be connected to a fuel source, the discharge port being adapted to be connected to a combustion chamber of the engine to supply fuel to the combustion chamber;
- a heat exchanger comprising a primary circuit and a secondary circuit, the primary circuit of the heat exchanger having an inlet intended to be connected to the fuel source and an outlet connected to the inlet port of the pump, the secondary circuit of the heat exchanger being intended to be connected to a heat transfer fluid circuit of the engine, the heat exchanger being configured to provide heat transfer between fuel circulating in the primary circuit of the heat exchanger and heat transfer fluid circulating in the secondary circuit of the heat exchanger;
- a recirculation circuit arranged to take fuel discharged through the discharge port of the pump and reinject the taken fuel into the primary circuit of the heat exchanger, the recirculation circuit comprising a regulating valve configured to modulate a flow rate of the fuel circulating within the recirculation circuit;
- control device configured to control the regulating valve as a function of a temperature of the heat transfer fluid circulating in the secondary circuit of the heat exchanger and/or a fuel flow rate at the inlet of the primary circuit of the heat exchanger, so as to increase the heat transfer between the fuel circulating in the primary circuit of the heat exchanger and the heat transfer fluid circulating in the secondary circuit of the heat exchanger.
- control device is configured to control the regulating valve as a function of a pressure difference across the regulating valve
- the pump is of the volumetric type; - the pump has a variable displacement, the system further comprising a control member for the displacement of the pump;
- system further comprises a device for controlling a pump drive speed
- the regulating valve is further configured to increase the flow rate of fuel circulating within the recirculation circuit in the event of failure of the control member and/or the control device;
- the system further comprises an additional heat exchanger comprising a primary circuit and a secondary circuit, the secondary circuit of the additional heat exchanger being designed to be connected to an additional circuit of another heat transfer fluid of the engine, the additional heat exchanger being configured to provide heat transfer between fuel circulating in the primary circuit of the additional heat exchanger and the other heat transfer fluid circulating in the secondary circuit of the additional heat exchanger;
- the primary circuit of the additional heat exchanger has an inlet intended to be connected to the fuel source and an outlet connected to the pump inlet port;
- the primary circuit of the additional heat exchanger has an inlet connected to the pump discharge port and an outlet intended to be connected to the engine combustion chamber.
- an aircraft engine comprising:
- the engine includes:
- system further comprises an additional heat exchanger comprising a primary circuit and a secondary circuit, the secondary circuit of the additional heat exchanger being provided to be connected to an additional circuit of another heat transfer fluid of the engine, the additional heat exchanger being configured to provide a heat transfer between fuel circulating in the primary circuit of the additional heat exchanger and the other heat transfer fluid circulating in the secondary circuit of the additional heat exchanger; and
- the heat transfer fluid is lubricating oil or a cooling fluid for an electrical machine
- the other heat transfer fluid is lubricating oil or a cooling fluid for an electrical machine.
- an aircraft comprising an airframe and an engine, wherein the engine is attached to the airframe.
- a method of regulating fuel for an aircraft engine comprising:
- the heat exchanger comprising the primary circuit and a secondary circuit, the primary circuit of the heat exchanger having an inlet connected to a fuel source of the system and an outlet connected to an inlet port of the pump, the secondary circuit of the heat exchanger being connected to a heat transfer fluid circuit of the engine, the heat exchanger being configured to provide heat transfer between fuel circulating in the primary circuit of the heat exchanger and heat transfer fluid circulating in the secondary circuit of the heat exchanger;
- the method is implemented by the system as previously described.
- Figure 1 illustrates an aircraft schematically.
- Figure 2 illustrates a schematic cross-sectional view of an aircraft propulsion system.
- Figure 3 schematically illustrates a fuel control system.
- Figure 4 schematically illustrates part of a fuel control system.
- Figure 5 schematically illustrates part of a fuel control system according to another alternative.
- Figure 6 is a flow chart illustrating an aircraft engine fuel control process.
- An aircraft 100 is a device configured to rise and move in the air, and may, for example, be an airplane, civil or military, or even a helicopter.
- An aircraft 100 comprises a cell which, in the case of an airplane, is composed of a fuselage, a wing comprising two wings, empennages, flight control surfaces and landing gear.
- a propulsion unit 1 comprises an engine 2 (or turbomachine) and a nacelle 3, and has a main direction extending along a longitudinal axis X-X.
- the propulsion unit 1 is configured to be fixed to the airframe of the aircraft 100, for example under its wings, in the case of an airplane, and this by means of a pylon (or mast).
- the propulsion unit 1 can also be mounted on the wing of the airplane or at the rear of its fuselage, or even be integrated into its fuselage.
- Engine 2 may be a twin-spool, dual-flow, direct-drive ducted turbojet engine as described below, but may also have a different number of spools and/or flows, and/or be another type of turbojet engine, such as a geared turbojet engine or a turboprop, with or without afterburner, ducted or unducted.
- upstream and downstream are used in reference to the overall direction of airflow through the propulsion unit 1 in operation.
- an axial direction corresponds to the direction of the longitudinal axis XX and a radial direction is a direction perpendicular to the longitudinal axis XX and intersecting the longitudinal axis XX.
- an axial plane is a plane containing the longitudinal axis XX and a radial plane is a plane perpendicular to the longitudinal axis XX.
- a circumference is understood to be a circle belonging to a radial plane and whose center belongs to the longitudinal axis XX.
- a tangential or circumferential direction is a direction tangent to a circumference: it is perpendicular to the longitudinal axis XX but does not pass through the longitudinal axis XX.
- the engine 2 comprises, from upstream to downstream, a fan 20, a compressor section 22, comprising a low pressure compressor 220 and a high pressure compressor 222, a combustion chamber 24 and a turbine section 26, comprising a high pressure turbine 262 and a low pressure turbine 260.
- the compressor section 22 comprises a succession of stages each comprising a wheel of moving blades (rotor) rotating in front of a wheel of fixed blades (stator).
- the turbine section 26 also comprises a succession of stages each comprising a wheel of fixed blades (stator) behind which a wheel of moving blades (rotor) rotates.
- the blower 20, the rotor part of the low-pressure compressor 220, and the rotor part of the low-pressure turbine 260 are connected to each other by a low-pressure shaft 280 extending along the longitudinal axis X-X, thus forming a low-pressure body 20, 220, 260, 280.
- the rotor part of the high-pressure compressor 222 and the rotor part of the high-pressure turbine 262 are connected to each other by a high-pressure shaft 282 extending along the longitudinal axis X-X, thus forming a high-pressure body 222, 262, 282.
- the low-pressure shaft 280 is generally housed, over a section of its length, in the high-pressure shaft 282 and is coaxial with the high-pressure shaft 282.
- the compressor section 22, the combustion chamber 24 and the turbine section 26 are surrounded by a motor housing 23, to which the stator parts of the low pressure compressor 220, the high pressure compressor 222, the high pressure turbine 262 and the low pressure turbine 260 are connected, while the fan 20 is surrounded by a fan casing 25.
- the engine casing 23 and the fan casing 25 are connected to each other by profiled arms 27 forming rectifiers (or OGV for "Outlet Guide Vanes" in English terminology) distributed circumferentially all around the longitudinal axis XX. At least some of these arms 27 can be provided structural.
- the longitudinal axis XX defines the axis of rotation for the fan 20, the rotor parts of the compressor section 22 and the rotor parts of the turbine section 26, in other words for the low-pressure body 20, 220, 260, 280 and the high-pressure body 222, 262, 282, which are each capable of being driven in rotation about the longitudinal axis XX relative to the engine casing 23 and the fan casing 25.
- the nacelle 3 extends radially outside the engine 2, all around the longitudinal axis X-X, so as to surround both the fan casing 25 and the engine casing 23, and to define, with a downstream portion of the engine casing 23, a downstream portion of a secondary flow path B, the upstream portion of the secondary flow path B being defined by the fan casing 25 and an upstream portion of the engine casing 23.
- the upstream portion of the nacelle 3 further defines an air inlet 29 through which the fan 20 draws in the air flow circulating through the propulsion unit 1.
- the nacelle 3 is integral with the fan casing 25 and attached and fixed to the aircraft 100 by means of the mast.
- the engine 2 may also comprise at least one accessory box, called ⁇ GB (for “Accessory gear box” in English terminology), for example housed in a cavity provided within the nacelle 3.
- the accessory box comprises a set of rotating elements, such as gears, making it possible to drive a plurality of shafts in rotation around their own axis, accessories being mounted on these shafts to derive useful mechanical power from their rotation.
- the gear assembly is itself driven using a power take-off shaft (RDS for "Radial Drive Shaft” in English terminology) connecting, possibly via a transfer case, the accessory case to at least one of the high-pressure body 222, 262, 282 and the low-pressure body 20, 220, 260, 280, typically by being meshed with at least one of the high-pressure shaft 282 and the low-pressure shaft 280.
- the power take-off shaft may extend inside a longitudinal cavity provided within one of the arms 27. In this way, mechanical power is likely to be taken from at least one of the high-pressure body 222, 262, 282 and the low-pressure body 20, 220, 260, 280 to be delivered to at least one of the accessories via the accessory box.
- the combustion chamber 24 comprises a fuel injection rail and a plurality of ignition injectors. The injection rail and/or the ignition injectors constitute fuel-consuming members of the engine 2.
- the engine 2 further comprises a certain number of components (or equipment) configured to be actuated by means of fuel. More precisely, these components are hydraulically actuated and it is intended to use pressurized fuel to ensure their operation. These components are usually referred to as “variable geometry equipment (or accessories)” or, more simply, “variable geometries”. Examples of variable geometries are: variable-pitch blades (e.g., stator blades of the high-pressure compressor 222), discharge valves of the primary stream A or of the secondary stream B. These variable geometries therefore need the hydraulic energy linked to the fuel pressure to operate. However, unlike an injector (ignition or injection rail) of the combustion chamber, the variable geometries do not consume fuel, because they do not degrade it by combustion.
- a controller may also be provided to provide the interface between the engine 2 and the aircraft 100, but also to control the engine 2.
- the controller may provide the functions of: regulating the circulation of the various fluids required for the operation of the engine 2, starting the engine 2, transmitting various parameters measured from the engine 2 to the cockpit of the aircraft 100, managing thrust or reverse thrust, etc.
- Such a controller may implement digital-type regulation and include a computer, a memory and various data exchange channels that interact with each other.
- the controller may be of the FADEC type (for “Full Authority Digital Engine Control” in English terminology).
- the fan 20 draws in an air flow, a portion of which, circulating within a primary vein A passing through the engine casing 23 from one side to the other, is successively compressed within the compressor section 22, ignited within the combustion chamber 24 by combustion of fuel, and expanded within the turbine section 26 before being ejected out of the engine 2.
- Another portion of the air flow circulates within the secondary vein B which takes an elongated annular shape surrounding the engine casing 23, the air drawn in by the fan 20 being straightened by the straighteners 27 and then ejected out of the propulsion unit 1.
- the propulsion unit 1 generates thrust. This thrust can, for example, be used for the benefit of the aircraft 100 on which the propulsion unit 1 is attached and fixed.
- the engine 2 comprises a fuel regulation system 4.
- the fuel control system 4 comprises a fuel source 40, such as a tank for storing fuel or a fuel supply circuit, provided to supply the fuel for combustion within the combustion chamber 24 and, optionally, for actuation of the variable geometries. Furthermore, a supply conduit 400 is connected to the fuel source 40.
- a fuel source 40 such as a tank for storing fuel or a fuel supply circuit
- the fuel control system 4 comprises a main circuit 41 connected to the fuel source 40 via the supply pipe 400, a recirculation circuit 42, connected to the main circuit 41, and a control device 43.
- a centrifugal booster pump 4000 is interposed between the fuel source 40 and the main circuit 41, on the supply pipe 400, to pressurize the main circuit 41.
- the main circuit 41 comprises an additional pump 411 designed to ensure, at least in part, or even in full, the supply of fuel to the combustion chamber 24, and/or the variable geometries, at the pressure and/or flow rate required by their operation.
- the pump 411 comprises an inlet port 4111 and a discharge port 4112.
- the pump 411 is arranged such that its inlet port 4111 is connected to the supply conduit 400 for admitting fuel from the fuel source 40, possibly previously pressurized by the centrifugal booster pump 4000.
- the inlet port 4111 of the pump 411 is connected to the supply conduit 400 by a main conduit 410.
- the pump 411 also comprises a stator part and a rotor part, the rotor part being intended to be driven relative to the stator part at a certain drive speed.
- the drive of the pump 411 can be implemented by mechanical tapping on one of the low pressure body 20, 220, 260, 280 and the high pressure body 222, 262, 282, possibly via the accessory box. In this case, the drive speed of the pump 411 is directly linked to the speed of the engine 2.
- a mechanical differential may be interposed between the accessory housing and the pump 411, to decouple the drive speed of the pump 411. of the engine speed 2.
- an external motor/generator electric or not, is also connected to the differential, to allow modulation of the drive speed of pump 411.
- the drive of the pump 411 is not implemented by mechanical tapping on one of the low pressure body 20, 220, 260, 280 and the high pressure body 222, 262, 282, but is implemented by means of an electric drive motor, the speed of which can be controlled.
- the decoupling of the drive speed of the pump 411 from the speed of the engine 2 makes it possible to modulate the fuel flow delivered by the pump 411 independently of the speed of the engine 2.
- the fuel regulation system 4 may comprise a device 4114 for controlling the drive speed of the pump 411, which controls the differential or the electric drive motor, if applicable.
- the pump 411 is preferably a volumetric type pump.
- the pump 411 may also have a variable displacement.
- the fuel regulation system 4 may comprise a control member 4113 which makes it possible to adjust the displacement of the pump 411 and, thus, to modulate the flow rate of fuel delivered by the pump 411 independently of the drive speed of the pump 411.
- the main circuit 41 further comprises a discharge conduit 412 connected to the discharge port 4112 of the pump 411 and to a fuel consuming member, such as an injector of the combustion chamber 24, so that the latter receives fuel from the pump 411.
- a fuel consuming member such as an injector of the combustion chamber 24
- the main circuit 41 comprises a regulator 417 positioned on the delivery pipe 412.
- the regulator 417 operates according to the same principle as a hydromechanical group and comprises a flow meter.
- the regulator 417 is advantageously connected to the control device 4114 and/or to the control member 4113 to control the flow rate of fuel delivered by the pump 411 according to the strict requirement of the combustion chamber 24.
- the main circuit 41 further comprises a filter 415 positioned on the main conduit 410, between the fuel source 40 and the intake port 4110 of the pump 411.
- Filter 415 is used to treat the fuel circulating within the fuel regulation system 4 in order to optimize its operation.
- the main circuit 41 further comprises a heat exchanger 413 positioned on the main conduit 410, between the fuel source 40 and the intake port 4110 of the pump 411.
- the heat exchanger 413 makes it possible to cool a heat transfer fluid using the fuel.
- the fuel control system 4 is then considered as a cold source capable of absorbing calories from the heat transfer fluid.
- the heat exchanger 413 comprises a primary circuit 4131 and a secondary circuit 4132.
- the primary circuit 4131 of the heat exchanger 413 has an inlet 4133 connected to the fuel source 40 and an outlet 4134 connected to the intake port 4110 of the pump 411, via the main conduit 410.
- the secondary circuit 4132 of the heat exchanger 413 is connected to a heat transfer fluid circuit 210 of the engine 2.
- the heat transfer fluid can be any fluid circulating in the engine 2 to cool or lubricate certain parts of the engine 2, such as lubricating oil or a cooling fluid, such as for example a cooling fluid for an electric machine.
- the heat exchanger 413 thus ensures a heat transfer between fuel circulating in the primary circuit 4131 of the heat exchanger 413 and the heat transfer fluid circulating in the secondary circuit 4132 of the heat exchanger 413.
- such a fuel regulation system 4 makes it possible, among other things, to cool the heat transfer fluid more efficiently. Indeed, by positioning the heat exchanger 413 upstream of the pump 411, the fuel circulating within the primary circuit 4131 is less hot. The heat transfer between the fuel and the heat transfer fluid is therefore improved.
- the main circuit 41 comprises an additional heat exchanger 414.
- the additional heat exchanger 414 has the same function of cooling a heat transfer fluid by the fuel as the heat exchanger 413.
- the additional heat exchanger 414 comprises a primary circuit 4141 and a secondary circuit 4142.
- the primary circuit 4141 of the additional heat exchanger 414 has an inlet 4143 and an outlet 4144.
- the additional heat exchanger 414 is positioned upstream of the pump 411, in the direction of circulation of the fuel within the system. fuel regulation 4 when pump 411 is operating.
- the additional heat exchanger 414 is positioned on the main conduit 410, between the fuel source 40 and the inlet port 4110 of the pump 411.
- the additional heat exchanger 414 can then be arranged in parallel or in series with the heat exchanger 413, upstream or downstream of the heat exchanger 413.
- the inlet 4143 of the primary circuit 4141 of the additional heat exchanger 414 is connected either to the fuel source 40 or to the outlet 4134 of the primary circuit 4131 of the heat exchanger 413.
- the outlet 4144 of the primary circuit 4141 of the additional heat exchanger 414 is connected either to the inlet 4133 of the primary circuit 4131 of the heat exchanger 413 or to the inlet port 4111 of the pump 411. 411.
- the additional heat exchanger 414 is positioned downstream of the pump 411, in the direction of circulation of the fuel within the fuel regulation system 4 when the pump 411 is in operation, being arranged on the delivery pipe 412.
- the inlet 4143 of the primary circuit 4141 of the additional heat exchanger 414 is connected to the delivery port 4112 of the pump 411, and the outlet 4144 of the primary circuit 4141 of the additional heat exchanger 414 is connected to a fuel-consuming member, such as the combustion chamber 24 and/or a variable geometry.
- the secondary circuit 4142 of the additional heat exchanger 414 is connected to a heat transfer fluid circuit 220 which is separate from the heat transfer fluid circuit to which the secondary circuit 4132 of the heat exchanger 413 is connected.
- the main circuit 41 may comprise several additional heat exchangers 414 positioned on the main conduit 410, between the fuel source 40 and the intake port 4110 of the pump 411 and/or on the discharge conduit 412, between the discharge port 4112 of the pump 411 and a fuel consuming member.
- the secondary circuit 4132 of the heat exchanger 413 is connected to a lubricating oil circuit and the secondary circuit 4142 of the additional heat exchanger 414 is connected to a cooling fluid circuit for an electric machine.
- the secondary circuit 4132 of the heat exchanger 413 is connected to a cooling fluid circuit for an electric machine and the secondary circuit 4142 of the additional heat exchanger 414 is connected to a lubricating oil circuit.
- the filter 415 can be positioned on the main duct 410 upstream of the heat exchanger 413 and the additional heat exchanger 414.
- the main circuit 41 further comprises a restriction 416 arranged at the delivery duct 412 and configured to control the fuel flow delivered by the pump 411. More specifically, the restriction 416 is configured to generate line losses (or pressure losses), of a thermal nature, within the delivery duct 412, which makes it possible to adjust the fuel flow within the duct connecting the delivery duct 412 to the injectors of the combustion chamber 24.
- the restriction 416 may be a variable section valve controlled by a servovalve.
- the fuel control system 4 further comprises a recirculation circuit 42.
- the recirculation circuit 42 comprises a secondary conduit 421 and a regulating valve 422.
- the recirculation circuit 42 is arranged to take from the delivery conduit 412, by means of the secondary conduit 421, fuel delivered by the delivery port 4112 of the pump 411 and reinject this taken fuel into the primary circuit 4131 of the heat exchanger 413 and/or into the primary circuit 4141 of the additional heat exchanger 414.
- the regulating valve 422 (or “bypass valve” according to English terminology) is mounted on the secondary conduit 421 of the recirculation circuit 42.
- the regulating valve 422 is configured to regulate the flow rate of the fuel circulating via the secondary conduit 421 into the primary circuit 4131 of the heat exchanger 413 and/or into the primary circuit 4141 of the additional heat exchanger 414.
- the regulating valve 422 is controlled by the control device 43.
- the regulating valve 422 is further configured to regulate the flow rate of fuel discharged through the discharge port 4112 of the pump 411 in the event of failure of the control member 4113 and/or the control device 4114.
- the recirculation circuit 42 then functions as an overflow of the discharge conduit 412 in order to prevent too high a fuel flow rate from supplying the combustion chamber 24.
- the regulating valve 422 therefore preferably has a dual function. On the one hand, it allows modulation of the fuel flow circulating within the primary circuit 4131, 4141, the heat exchanger 413, and/or the additional heat exchanger 414. On the other hand, it preferably allows regulation of the fuel flow circulating within the primary circuit 4131, 4141, the heat exchanger 413, and/or the additional heat exchanger 414. within the discharge conduit 412 and sent to the combustion chamber 24, in the event of failure of the control member 4113 and/or the control device 4114.
- the recirculation circuit 42 makes it possible to increase the flow rate of fuel circulating within the primary circuit 4131, 4141, the heat exchanger 413, and/or the additional heat exchanger 414. Such an increase therefore improves the heat transfer between the fuel and the heat transfer fluid.
- the control device 43 is configured to control the regulating valve 422 as a function of a temperature of the heat transfer fluid circulating in the secondary circuit 4132, 4142, of the heat exchanger 413 and/or of the additional heat exchanger 414, of a fuel flow rate at the inlet 4133, 4143, of the primary circuit 4131, 4141, of the heat exchanger 413 and/or of the additional heat exchanger 414, and/or of a pressure difference at the terminals of the regulating valve 422.
- control device 43 can also be configured to control the regulating valve 422 as a function of the fuel flow circulating within the delivery conduit 412 and sent to the combustion chamber 24, in the event of failure of the control member 4113 and/or the control device 4114.
- the presence of the regulating valve 422 in the recirculation circuit 42 makes it possible to modulate the flow rate of fuel circulating within the primary circuit 4131, 4141, the heat exchanger 413, and/or the additional heat exchanger 414 according to the thermal cooling requirements of the heat transfer fluid and no longer only according to the fuel supply requirements of the combustion chamber 24. Furthermore, controlling the regulating valve 422 according to the flow rate of fuel circulating within the delivery pipe 412 makes it possible to overcome a failure of the control member and/or the control device 4114 and thus avoid excessive fuel transmission to the combustion chamber 24.
- a fuel regulation method can be implemented, in particular using a fuel regulation system 4.
- the method first implements a sampling E1 of a portion of the fuel, discharged through the discharge port 4112 of the pump 411, thanks to the recirculation circuit 42.
- the recirculation circuit 42 carries out, by means of the secondary conduit 421, an injection E2 within the primary circuit 4131, 4141, the heat exchanger 413 and/or the additional heat exchanger 414 of the fuel previously taken.
- the regulating valve 422 implements a modulation E3 of the flow rate of fuel injected into the primary circuit 4131, 4141 of the heat exchanger 413 and/or the additional heat exchanger 414, so as to increase the heat transfer between, on the one hand, the fuel circulating in the primary circuit 4131, 4141 of the heat exchanger 413 and/or the additional heat exchanger 414 and, on the other hand, the heat transfer fluid circulating in the secondary circuit 4132, 4142 of the heat exchanger 413 and/or the additional heat exchanger 414.
- the regulating valve 422 can implement a regulation step E4 of the fuel flow circulating within the delivery conduit 414 and sent to the combustion chamber 24, in particular in the event of failure of the control member 4113 and/or the control device 4114.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480037845.XA CN121263594A (zh) | 2023-06-05 | 2024-06-05 | 燃料控制系统 |
| EP24734951.7A EP4720487A1 (fr) | 2023-06-05 | 2024-06-05 | Système de régulation de carburant |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2305615 | 2023-06-05 | ||
| FR2305615A FR3149349A1 (fr) | 2023-06-05 | 2023-06-05 | Système de régulation de carburant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024252095A1 true WO2024252095A1 (fr) | 2024-12-12 |
Family
ID=88068748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2024/050721 Ceased WO2024252095A1 (fr) | 2023-06-05 | 2024-06-05 | Système de régulation de carburant |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4720487A1 (fr) |
| CN (1) | CN121263594A (fr) |
| FR (1) | FR3149349A1 (fr) |
| WO (1) | WO2024252095A1 (fr) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4696156A (en) * | 1986-06-03 | 1987-09-29 | United Technologies Corporation | Fuel and oil heat management system for a gas turbine engine |
| GB2508530A (en) * | 2011-08-08 | 2014-06-04 | Snecma | Method for estimating the temperature of the fuel leaving a turbomachine exchanger |
| EP3179075A1 (fr) * | 2015-12-08 | 2017-06-14 | General Electric Company | Système de gestion thermique pour turbine à gaz |
| US20180016024A1 (en) * | 2016-07-12 | 2018-01-18 | United Technologies Corporation | Electric heating for fuel system components |
| FR3104641A1 (fr) * | 2019-12-17 | 2021-06-18 | Safran Aircraft Engines | Circuit d’alimentation en carburant d’une turbomachine, turbomachine et aéronef ayant celui-ci |
-
2023
- 2023-06-05 FR FR2305615A patent/FR3149349A1/fr active Pending
-
2024
- 2024-06-05 WO PCT/FR2024/050721 patent/WO2024252095A1/fr not_active Ceased
- 2024-06-05 CN CN202480037845.XA patent/CN121263594A/zh active Pending
- 2024-06-05 EP EP24734951.7A patent/EP4720487A1/fr active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4696156A (en) * | 1986-06-03 | 1987-09-29 | United Technologies Corporation | Fuel and oil heat management system for a gas turbine engine |
| GB2508530A (en) * | 2011-08-08 | 2014-06-04 | Snecma | Method for estimating the temperature of the fuel leaving a turbomachine exchanger |
| EP3179075A1 (fr) * | 2015-12-08 | 2017-06-14 | General Electric Company | Système de gestion thermique pour turbine à gaz |
| US20180016024A1 (en) * | 2016-07-12 | 2018-01-18 | United Technologies Corporation | Electric heating for fuel system components |
| FR3104641A1 (fr) * | 2019-12-17 | 2021-06-18 | Safran Aircraft Engines | Circuit d’alimentation en carburant d’une turbomachine, turbomachine et aéronef ayant celui-ci |
Also Published As
| Publication number | Publication date |
|---|---|
| CN121263594A (zh) | 2026-01-02 |
| FR3149349A1 (fr) | 2024-12-06 |
| EP4720487A1 (fr) | 2026-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11781484B2 (en) | Secondary fuel flow demand fuel pumping system | |
| FR3028888A1 (fr) | Dispositif de refroidissement pour une turbomachine alimente par un circuit de decharge | |
| US12276333B2 (en) | Gearbox assembly lubrication system for a turbine engine | |
| US12228042B1 (en) | Lubrication system for a turbine engine | |
| FR3144222A1 (fr) | Systèmes de combustion d’aéronef | |
| FR3144210A1 (fr) | Conditions de fonctionnement de turbine à gaz | |
| EP4463621B1 (fr) | Turbomoteur a cycle récupéré | |
| US12560101B2 (en) | Lubrication system for a turbine engine | |
| EP4502345A1 (fr) | Système de lubrification pour moteur à turbine | |
| CN121084614A (zh) | 用于飞行器的发动机系统 | |
| US12442314B2 (en) | Lubrication system for a turbine engine | |
| EP4720487A1 (fr) | Système de régulation de carburant | |
| CA2839248C (fr) | Architecture double corps de turbomoteur avec compresseur haute pression lie a la turbine basse pression | |
| FR3145018A1 (fr) | Système de régulation de carburant | |
| FR3132931A1 (fr) | Système de régulation de carburant | |
| FR3149644A1 (fr) | Système de régulation de carburant | |
| US12460561B2 (en) | Lubrication system for a turbine engine | |
| FR3133407A1 (fr) | Système de régulation de carburant | |
| US12486803B2 (en) | Gas turbine engine system with fuel driven turbine | |
| FR3133408A1 (fr) | Système de régulation de carburant | |
| FR3152829A1 (fr) | Circuit de dégivrage d’un bec de séparation de turbomachine | |
| WO2025078763A1 (fr) | Procede de rechauffage du carburant d'un systeme d'alimentation en carburant d'une turbomachine | |
| WO2025257505A1 (fr) | Ensemble propulsif pour aeronef comprenant deux circuits d'huile distincts | |
| FR3162472A1 (fr) | Ensemble comprenant un boitier, un circuit d’huile et un circuit de carburant | |
| WO2025125751A1 (fr) | Module pour une turbomachine comprenant un circuit d'alimentation en huile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 24734951 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: CN202480037845X Country of ref document: CN |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2024734951 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2024734951 Country of ref document: EP Effective date: 20260105 |
|
| ENP | Entry into the national phase |
Ref document number: 2024734951 Country of ref document: EP Effective date: 20260105 |
|
| ENP | Entry into the national phase |
Ref document number: 2024734951 Country of ref document: EP Effective date: 20260105 |
|
| WWP | Wipo information: published in national office |
Ref document number: 2024734951 Country of ref document: EP |