EP4490039A1 - Ensemble propulsif pour un aeronef - Google Patents
Ensemble propulsif pour un aeronefInfo
- Publication number
- EP4490039A1 EP4490039A1 EP23714233.6A EP23714233A EP4490039A1 EP 4490039 A1 EP4490039 A1 EP 4490039A1 EP 23714233 A EP23714233 A EP 23714233A EP 4490039 A1 EP4490039 A1 EP 4490039A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- type
- downstream
- downstream stator
- blades
- blade
- 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.)
- Pending
Links
Classifications
-
- 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
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/16—Blades
- B64C11/18—Aerodynamic features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
-
- 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
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/10—Aircraft characterised by the type or position of power plants of gas-turbine type
- B64D27/12—Aircraft characterised by the type or position of power plants of gas-turbine type within, or attached to, wings
-
- 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
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/10—Aircraft characterised by the type or position of power plants of gas-turbine type
- B64D27/14—Aircraft characterised by the type or position of power plants of gas-turbine type within, or attached to, fuselages
-
- 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
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/40—Arrangements for mounting power plants in aircraft
- B64D27/402—Arrangements for mounting power plants in aircraft comprising box like supporting frames, e.g. pylons or arrangements for embracing the power plant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
- F04D29/544—Blade shapes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/563—Fluid-guiding means, e.g. diffusers adjustable specially adapted for elastic fluid pumps
-
- 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
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D2027/005—Aircraft with an unducted turbofan comprising contra-rotating rotors, e.g. contra-rotating open rotors [CROR]
Definitions
- the present disclosure relates to the field of longitudinal axis aeronautical thrusters comprising (at least) two annular rows of non-ducted blades, one upstream, the other downstream, along the longitudinal axis.
- the aeronautical propellant may comprise (at least) a heat engine, in particular a turbomachine, turboshaft, turbojet, turbofan, and/or (at least) an electric motor, and/or (at least) a hydrogen engine, and /or (at least) a hybrid engine: thermal and/or electric and/or hydrogen.
- a heat engine in particular a turbomachine, turboshaft, turbojet, turbofan, and/or (at least) an electric motor, and/or (at least) a hydrogen engine, and /or (at least) a hybrid engine: thermal and/or electric and/or hydrogen.
- a turbomachine with a “non-ducted” fan is a type of turbomachine in which the fan (or propeller) extends in outside the engine casing (or nacelle), unlike conventional turbomachines (of the “Turbofan” type) in which the fan is ducted.
- An example of such a turbomachine is shown in Figure 1.
- the turbomachine 10 comprises a hub 12, defining the engine casing, and on which is mounted an annular row of non-ducted upstream blades 14 and an annular row of non-ducted downstream blades 16 which are spaced from one another along an axis longitudinal X of the turbomachine 10.
- the annular row of upstream blades 14 and the annular row of downstream blades 16 respectively define an upstream propeller and a downstream propeller.
- the orientation qualifiers such as “longitudinal”, “radial” or “circumferential”, are defined by reference to the longitudinal axis X of the turbomachine 10.
- the relative qualifiers “upstream” and “downstream” are defined one relative to the other with reference to the flow of gases in the turbomachine 10 along the longitudinal axis X.
- the turbomachine 10 comprises, from upstream to downstream inside the engine casing, a ( or compressor(s) 2, at least one combustion chamber 4, one (or more) turbine(s) 6 and at least one exhaust nozzle 8.
- the annular row of downstream stator blades 16 is centered on the longitudinal axis USF type configuration makes it possible to exploit, through the downstream propeller, the gyration energy of the air flow coming from the upstream propeller.
- the efficiency of the turbomachine 10 is thus improved, in particular compared to a conventional turbomachine comprising a single rotating propeller.
- the unducted upstream rotor blades 16 are rotated around the longitudinal axis X by the turbine(s) 6 which itself drives the compressor(s). s) 2.
- the turbomachine 10 generally includes a speed reduction box (“gearbox” in English) in order to decouple the rotational speed of the turbines 6 relative to the rotational speed of the upstream propeller.
- the turbomachine 10 can have a so-called “pusher” configuration in which the annular row of upstream rotor blades 14 and the annular row of downstream stator blades 16 are located at a downstream end portion of the turbomachine 10 ( configuration shown in Figure 1), or the turbomachine 10 can have a so-called “puller” configuration in which the annular row of upstream rotor blades 14 and the annular row of downstream stator blades 16 are located at an end portion upstream of the turbomachine 10.
- the annular row of upstream rotor blades 14 and the annular row of downstream stator blades 16 can surround a section of the compressor(s) 2 of the turbomachine or the speed reduction unit.
- the annular row of upstream blades 14 and the annular row of downstream stator blades 14 can surround a section of the turbine(s) 6 of the turbomachine 10.
- the upstream air flow perceived by the turbomachine 10 is not parallel to the longitudinal axis upstream 14 vary according to the position around the longitudinal axis X of the upstream rotor blade 14 during its rotation around the longitudinal axis
- the incidence of the air flow perceived by the turbomachine 10 is modified by the upstream propeller in a heterogeneous manner around the longitudinal axis X. Consequently, the aerodynamic load applied to each of the downstream stator blades 16 differs according to the position around the longitudinal axis landing and takeoff phases.
- An aeronautical thruster with a longitudinal axis comprising a hub, an annular row of upstream non-ducted rotor blades and an annular row of downstream non-ducted stator blades, the annular row of upstream rotor blades and the annular row of blades.
- downstream stator blades being spaced from one another along the longitudinal axis, in which the annular row of downstream stator blades comprises:
- each downstream stator blade of the first type being located around the longitudinal axis in a first angular sector around the longitudinal axis, each downstream stator blade of the first type being wedged fixed, - at least one downstream stator blade of a second type, each downstream stator blade of the second type being located around the longitudinal axis outside said first angular sector, each downstream stator blade of the second type being with variable pitch.
- Each downstream stator blade of the second type can be rotated around a respective timing axis to change the angle of incidence of the air flow on the downstream stator blade of the second type.
- the rotational adjustment of each downstream stator blade of the second type around the respective setting axis can be carried out as a function of the incidence operating phase of the aeronautical propeller (i.e. in particular landing phase and/or take-off phase), and/or depending on the air flow conditions taken locally at the level of the downstream stator blade.
- the local air flow conditions at the level of each downstream stator blade may depend, depending on the position of the downstream stator blade around the longitudinal axis, the wake of the upstream rotor blades and/or the presence of elements of structure of an aircraft on which the aeronautical propeller is mounted (mast, fuselage, wing, slat, flaps, etc.). This makes it possible, on the one hand, to reduce the noise level emitted by the aeronautical propeller, and on the other hand, to improve the aerodynamic performance of the annular row of downstream stator blades.
- the annular row of upstream rotor blades is movable in rotation around the longitudinal axis.
- the annular row of downstream stator blades is locked in rotation around the longitudinal axis.
- the annular row of downstream stator blades is therefore fixed around the longitudinal axis. In other words, the downstream stator blades are not rotated around the longitudinal axis.
- non-ducted used in reference to the upstream rotor blades and the downstream stator blades indicates that the upstream rotor blades and the downstream stator blades are not surrounded by a nacelle, unlike conventional aeronautical thrusters in which the fan is streamlined inside a nacelle.
- the annular row of upstream rotor blades and the annular row of downstream stator blades can respectively define an upstream propeller and a downstream propeller.
- the annular row of downstream stator blades can be a rectifier.
- Each blade (upstream and/or downstream) can extend radially.
- Each blade can extend between a radially internal end, this being located at the level of (that is to say closest to) the hub of the aeronautical propeller, and a radially internal end. external.
- the radially internal end can be, longitudinally, at the level of a leading edge of the blade or at the level of the setting axis of the blade considered.
- the radially internal end is also called the “root” of the blade.
- a position of each blade around the longitudinal axis can be identified by the position around the longitudinal axis of the radially internal end of the respective blade.
- the radially outer end of each blade is the opposite end of the radially inner end of the blade.
- the radially outer end may be the free end of the blade.
- the radially internal end and the radially external end of each of the blades can be radially aligned and/or at the same longitudinal position. It cannot be excluded that the radially inner end and the radially outer end of each of the blades may be longitudinally and/or circumferentially offset relative to each other.
- the position of each of the blades (upstream and/or downstream) around the longitudinal axis can be expressed according to an angular position around the longitudinal axis.
- the angular position of each of the blades (upstream and/or downstream) can be located in relation to a time dial (here seen from the upstream for example) whose angular positions at 12 o'clock, 3 o'clock, 6 o'clock and 9 o'clock are positioned in a conventional manner .
- the angular position at 12 o'clock is therefore positioned vertically upwards in relation to the longitudinal axis.
- the angular position at 6 o'clock is positioned vertically downward in relation to the longitudinal axis.
- the angular position at 3 o'clock is positioned horizontally to the right in relation to the longitudinal axis.
- the angular position at 9 o'clock is positioned horizontally to the left in relation to the longitudinal axis.
- An axis extending radially passing through the angular positions at 12 o'clock and 6 o'clock is thus perpendicular to an axis extending radially passing through the angular positions at 3 o'clock and 9 o'clock.
- Absolute position qualifiers such as the terms “top”, “bottom”, “left”, “right”, etc., or relative position, such as the terms “above”, “below”, “superior”, “lower”, etc., and orientation qualifiers, such as the terms “vertical” and “horizontal” can be considered in an operational state of the aeronautical propellant, typically when it is installed on an aircraft placed on the ground.
- the axis passing through the angular positions at 12 o'clock and at 6 o'clock extends in the direction of the gravity field, i.e. vertically.
- the angular position of each blade can be defined by an angle measured around the longitudinal axis positively clockwise relative to the angular position at 12 o'clock.
- the angle can be measured between an axis perpendicular to the longitudinal axis of the aeronautical propeller passing through the radially inner end (or the radially outer end) of the downstream stator blade and the axis passing through the positions angular at 12 o'clock and 6 o'clock.
- the angular position of a blade located at the angular position at 12 o'clock can be defined by an angle equal to 0°
- the angular position of a blade located at the angular position at 3 o'clock can be defined by an angle equal to 90 °
- the angular position of a blade located at the angular position at 6H can be defined by an angle equal to 180° (or equivalently to -180°)
- the angular position of a blade located at the angular position at 9H can be defined by an angle equal to 270° (or equivalently to - 90°).
- Each blade has a radially external radius.
- the radially outer radius of a blade can be considered as the radial distance from the longitudinal axis of the radially outer end of the blade. In other words, this is the maximum radius of the blade.
- the maximum radially external radius among the annular row of upstream rotor blades corresponds to the radially external radius of the upstream propeller.
- Each upstream rotor blade can have an identical radially external radius. In this case, the radially external radius of each upstream rotor blade corresponds to the radially external radius of the upstream propeller.
- the maximum radially external radius among the annular row of downstream stator blades corresponds to the radially external radius of the downstream propeller.
- Each downstream stator blade can have an identical radially external radius.
- the radially external radius of each downstream stator blade corresponds to the radially external radius of the downstream propeller.
- the annular row of stator blades may comprise two stator blades (possibly circumferentially consecutive) which have a radially external radius different from one another.
- the annular row of stator blades may comprise two stator blades (possibly circumferentially consecutive) which have a radially internal radius different from one another.
- Each blade (upstream and/or downstream) can have an aerodynamic profile.
- each blade may comprise a stack of sections in the radial direction.
- a stacking line can be defined which passes through the center of gravity of each section of the blade. It is not excluded that the stacking line of one of the blades or of several blades forms a non-linear curve. In a particular case, the stacking line of one of the blades or of several blades can extend radially in a rectilinear manner.
- Each section extends in a respective section plane which is perpendicular to the radial direction of extension of the corresponding blade.
- Each section may comprise a leading edge upstream and a trailing edge downstream between which extend an intrados line and an extrados line.
- Each section can define an aerodynamic profile.
- Each section may include a chord defined by a straight portion connecting the leading edge to the trailing edge.
- the leading edge and the trailing edge of all the sections of the stack of sections can respectively form, for each blade, a leading edge and a trailing edge of the blade.
- the intrados line and the extrados line of all the sections of the stack of sections can respectively form, for each blade, an intrados face and an extrados face of the downstream stator blade .
- the intrados face and the extrados face can be, for each of the downstream stator blades, positioned relative to each other in the same direction in the circumferential direction.
- Each stator blade (of the first and second type) has a respective wedging axis.
- the timing axis of each downstream stator blade can be included in a plane perpendicular to the longitudinal axis. In other words, the timing axis of each downstream stator blade can extend in a direction whose longitudinal component is zero.
- the timing axis of each downstream stator blade can extend radially. It cannot be excluded that the timing axis comprises a radial component and/or a longitudinal component and/or a circumferential component.
- the pitch angle of each downstream stator blade can correspond to the angle formed between, on the one hand, a first axis which is defined by the intersection between the section plane of a reference section among the stack of sections of the blade and a plane perpendicular to the longitudinal axis (which may include the setting axis of the downstream stator blade), and on the other hand, the chord of the reference section of the downstream stator blade .
- the angle can be measured on the upstream side of the plane perpendicular to the longitudinal axis.
- the angle can be measured positively in a direction going from the first axis to the chord of the reference section, and more particularly in a direction coinciding with the direction going from the intrados line to the extrados line.
- a first downstream stator blade can be said to be “closed-pitch” relative to a second downstream stator blade when it has a pitch angle less than the pitch angle of the second downstream stator blade, preferably at least least 0.1°, more preferably at least 1°.
- a first downstream stator blade can be said to be “open-pitch” relative to a second downstream stator blade when it has a pitch angle greater than the pitch angle of the second downstream stator blade, preferably d at least 0.1°, more preferably at least 1°.
- Each downstream stator blade of the second type can be pivotally mounted around the respective wedging axis which extends in a direction which comprises at least one radial component.
- the aeronautical propeller may further comprise means for driving each of the downstream stator blades of the second type independently or together in rotation around the respective timing axis.
- the aeronautical propeller may comprise means for driving together each of the downstream stator blades of the second type which are arranged in a second angular sector around the longitudinal axis, distinct from the first angular sector, in rotation around the axis of respective setting.
- each downstream stator blade of the second type can be connected, at its radially internal end, to a wedging arm which is adapted to rotate around the wedging axis of the downstream stator blade of the second type.
- each downstream stator blade can be located at the radially internal end of the downstream stator blade.
- the reference section of each downstream stator blade can be located, on the corresponding downstream stator blade, at a radial distance from the longitudinal axis which corresponds to 75% of the radially external radius of the corresponding downstream stator blade.
- the reference section of each downstream stator blade can be located, on the downstream stator blade, at a radial distance from the longitudinal axis which corresponds to 75% of the radially external radius of the downstream stator blade which presents the radius radially minimal external among the annular row of downstream stator blades.
- the aeronautical propeller can comprise between 2 and 25 upstream rotor blades.
- the aeronautical propeller can include between 2 and 25 downstream stator blades.
- the aeronautical propeller can comprise between 1 and 6 downstream stator blades of the first type.
- the aeronautical propeller may preferably comprise 2 downstream stator blades of the first type.
- the number of upstream rotor blades may be different from the number of downstream stator blades. This makes it possible to reduce the number of upstream rotor blades which are simultaneously positioned circumferentially around the longitudinal axis facing longitudinally one of the downstream stator blades. Thus, this reduces the number of wakes of upstream rotor blades which interact simultaneously on the downstream stator blades. The noise emitted by the thruster is then reduced.
- the number of upstream rotor blades may be greater than the number of downstream stator blades.
- Each downstream stator blade constitutes a source of noise emission, thus a reduced number of downstream stator blades makes it possible to further reduce the noise level emitted by the propeller.
- the solidity of the annular row of downstream stator blades can be less than or equal to 3 over all of the radial dimension of each downstream stator blade.
- the solidity is less than or equal to 1 at a radially external end of each downstream stator blade.
- the solidity of the annular row of upstream rotor blades can be less than or equal to 3 on the entire radial dimension of each upstream rotor blade.
- the solidity is less than or equal to 1 at the level of a radially external end of each upstream rotor blade.
- the ratio between, on the one hand, the distance in the longitudinal direction separating a median plane of the annular row of upstream rotor blades and a median plane of the annular row of downstream stator blades, and on the other hand, the diameter of the aeronautical propellant can vary between 0.01 and 0.8, preferably between 0.1 and 0.5.
- the median plane of each annular row of blades can be normal to the longitudinal axis.
- the median plane of each annular row of blades can be the plane containing the pitch axis of each of the blades of the corresponding annular row.
- the median plane of each annular row of blades can be the plane containing the pitch axis of at least one of the blades of the corresponding annular row.
- the diameter of the aeronautical propeller can be defined as being twice the radially external radius of the upstream propeller.
- the trailing edge of each of the blades of the upstream annular row is located longitudinally upstream of a leading edge of each of the blades of the downstream annular row.
- the hub can be axisymmetric around the longitudinal axis.
- the first angular sector can extend over an angular range less than or equal to 180°, preferably less than or equal to 120°, more preferably less than or equal to 60°.
- At least two downstream stator blades of the first type can have an identical pitch angle. This simplifies the manufacturing of the aeronautical propellant.
- Each downstream stator blade of the first type can have an identical pitch angle.
- At least two downstream stator blades of the first type can have a different pitch angle. Said two downstream blades of the first type can be circumferentially consecutive.
- the difference between the pitch angle of two downstream stator blades of the first type can be less than 120°, preferably less than 60°.
- the difference between the pitch angle of two circumferentially consecutive downstream stator blades of the first type may be less than 45°, preferably less than 15°.
- the pitch angle of each downstream stator blade of the first type can be determined as a function of the angular position of the downstream stator blade of the first type around the longitudinal axis, in particular according to a linear, parabolic, sinusoidal law, logarithmic, or exponential.
- Each downstream stator blade of the first type can have identical dimensional characteristics. This simplifies the manufacturing of the aeronautical propellant. At least two downstream stator blades of the first type may have identical dimensional characteristics. It is understood that for each section of one of the two downstream stator blades, there exists a corresponding section of the other among the two downstream stator blades which is arranged at the same radial distance from the longitudinal axis and which has the same aerodynamic profile.
- At least two downstream stator blades of the first type may have different dimensional characteristics. It is understood that for each section of one of the two downstream stator blades, there exists a corresponding section of the other among the two downstream stator blades which is arranged at the same radial distance from the longitudinal axis and which has a profile different aerodynamics.
- the annular row of downstream stator blades may comprise a first set and a second set of downstream stator blades of the first type, each downstream stator blade of the first type of the first set having identical first dimensional characteristics and each downstream stator blade of the first type of the second set having identical second dimensional characteristics.
- At least two downstream stator blades have identical dimensional characteristics on an upstream end portion which extends longitudinally over a relative chord length of between 2% and 50%, preferably between 10% and 30%. .
- there exists a corresponding section of the other among the two downstream stator blades which is arranged at the same radial distance from the longitudinal axis and which presents the same aerodynamic profile over a relative chord length of the section between 2% and 50%, preferably between 10% and 30%.
- At least two downstream stator blades of the second type can have a different pitch angle. Said two downstream blades of the second type can be circumferentially consecutive. At least two downstream stator blades of the second type can have an identical pitch angle.
- the difference between the pitch angle of two downstream stator blades of the second type can be less than 120°, preferably less than 60°.
- the difference between the pitch angle of two circumferentially consecutive downstream stator blades of the second type may be less than 20°, preferably less than 15°.
- the difference between the pitch angle of two circumferentially consecutive downstream stator blades of the second type may be less than the difference between the pitch angle of two circumferentially consecutive downstream stator blades of the first type.
- the pitch angle of each downstream stator blade of the second type can be determined as a function of the angular position of the downstream stator blade of the second type around the longitudinal axis, in particular according to a linear, parabolic, sinusoidal law, logarithmic, or exponential.
- Each downstream stator blade of the second type may have a pitch angle different from the pitch angle of the circumferentially adjacent downstream stator blades of the second type. This makes it possible to reduce the correlation of noise sources and therefore makes it possible to reduce the noise level emitted by the aeronautical propeller.
- Each downstream stator blade of the second type can have identical dimensional characteristics.
- the annular row of stator blades may comprise a first group of downstream stator blades of the second type which each have a first pitch angle and a second group of downstream stator blades of the second type which each have a second pitch angle different from the first pitch angle. wedging.
- the first group of downstream stator blades of the second type and the second group of downstream stator blades of the second type may each comprise at least two circumferentially adjacent downstream stator blades of the second type.
- a propulsion assembly for an aircraft, the propulsion assembly comprising an aeronautical propellant as described above and a pylon for fixing the aeronautical propellant to the aircraft, the pylon extending according to one direction comprising at least one radial component from a radially internal end by which the pylon is connected to the hub of the aeronautical propeller, the first angular sector being is centered on a longitudinal median plane of the pylon.
- the pylon may comprise a leading edge and a trailing edge between which extend on each side in the circumferential direction an extrados face and an intrados face, the extrados face and the d face.
- the lower surface of the pylon being, at least on an upstream part of the pylon, arranged circumferentially on each side of a radial plane defined by the longitudinal axis and a radial axis passing, at least in part, through the leading edge of the pylon , the annular row of downstream stator blades of the aeronautical propeller comprising:
- first group comprising one or more downstream blade(s) of the first type which each have a downstream end located circumferentially on the same side as the extrados face of the pylon with respect to the radial plane, the first group comprising at least the downstream stator blade of the first type which is closest circumferentially to the radial plane and whose downstream end is located circumferentially on the same side as the extrados face of the pylon with respect to the radial plane,
- a second group comprising one or more downstream blade(s) of the first type which each have a downstream end located circumferentially on the same side as the intrados face of the pylon with respect to the radial plane, the second group comprising at least the downstream stator blade of the first type which is closest circumferentially to the radial plane and whose downstream end is located circumferentially on the same side as the intrados face of the pylon with respect to the radial plane.
- Each downstream stator blade of the first type of the first group can be in a closed setting configuration relative to the downstream stator blades of the first type of the second group.
- Such an arrangement makes it easier to bypass the air flow around the pylon, thus reducing a rise in pressure distortion between the pylon and the downstream stator blades of the first type, and avoiding separation of the boundary layers and the formation of recirculation zones on the downstream stator blades of the first type which would increase aerodynamic losses and noise levels.
- the pylon may have a shape which does not have an aerodynamic profile.
- the pylon may have a symmetrical shape with respect to a longitudinal plane (ie which includes at least the longitudinal axis).
- each downstream stator blade of the first type of the second group is in an open-wedge configuration relative to the downstream stator blades of the first type of the first group.
- each downstream stator blade of the first type of the first group can be in the closed pitch configuration relative to the downstream stator blades of the second type and each downstream stator blade of the first type of the second group can be in the open pitch configuration relative to the blades.
- downstream stators of the second type are downstream stators of the second type.
- the pylon can be connected to one of the downstream stator blades so as to form a unitary aerodynamic assembly. This reduces the drag forces linked to the pylon.
- the pylon can be positioned around the axis of rotation at an angular position at 12 o'clock or 6 o'clock around the longitudinal axis of the aeronautical propeller. Such a configuration allows the attachment of the aeronautical propellant under or on the wing of the aircraft.
- the pylon can be positioned around the axis of rotation at an angular position at 3 o'clock or 9 o'clock around the longitudinal axis of the aeronautical propeller. Such a configuration allows the attachment of the aeronautical propellant at the level of a rear part of a fuselage of the aircraft.
- the pylon can be arranged longitudinally, in whole or in part, downstream of the annular row of downstream stator blades.
- the pylon can be arranged circumferentially, in whole or in part, between two circumferentially adjacent downstream stator blades of the first type.
- an aircraft comprising an aeronautical propellant as described above or a propulsion assembly as described above.
- a method of using the aeronautical propeller as described above or the propulsion assembly as described above comprising adjusting the pitch angle of each downstream stator blade of the second type depending on an operating phase of incidence of the aeronautical propellant.
- An incidence operating phase can be characterized by one or more of the following characteristics:
- the propulsion assembly comprises a high-lift device (slat, flap) in an at least partially deployed state;
- the altitude of the propulsion unit is less than or equal to 5000 m;
- the slope of the trajectory of the propulsion assembly is between -1° and -10° (landing angle of attack phase) or between 1° and 20° (takeoff angle of attack phase);
- the propulsion assembly is attached to an aircraft whose angle of attack (i.e. the angle between the forward speed and the main axis of a fuselage of the aircraft) is between 0° and 10° (landing angle of attack phase) or between 0° and 15° (takeoff angle of attack phase).
- angle of attack i.e. the angle between the forward speed and the main axis of a fuselage of the aircraft
- takeoff angle of attack phase i.e. the angle between the forward speed and the main axis of a fuselage of the aircraft
- the method may include a reading of one or more of the preceding characteristics and a transmission of the characteristic(s) in the form of data to a digital regulation system (for example an interface between a cockpit and the propeller , called “Full Authority Digital Engine Control”, also called “FADEC”).
- a digital regulation system for example an interface between a cockpit and the propeller , called “Full Authority Digital Engine Control”, also called “FADEC”.
- the determination of the pitch angle of each downstream stator blade of the second type can be carried out by controlling said data, in particular by the digital regulation system.
- Figure 1 is a partial schematic sectional view of a turbomachine with an unducted fan according to the prior technique
- Figure 2 is a partial schematic view of a turbomachine with an unducted fan according to the present description
- Figure 3 includes Figure 3a which is a schematic view of a downstream stator blade of the turbomachine of Figure 2 and Figure 3b which is a schematic view of the downstream stator blade Figure 3 in the section plane III- lll;
- Figure 4 includes Figures 4a and 4b which are respectively a schematic perspective view and a schematic sectional view of an annular row of stator blades downstream of the turbomachine of Figure 2;
- Figure 5 is a circumferentially extended schematic partial view of a first configuration of the annular row of downstream stator blades of Figure 4;
- Figure 6 includes Figures 6a to 6c which each represent a graph illustrating a variant of the first configuration of the annular row of downstream stator blades of Figure 5;
- Figure 7 is a circumferentially extended schematic partial view of a second configuration of the annular row of downstream stator blades of Figure 4;
- Figure 8 includes Figures 8a and 8b which are each a circumferentially extended schematic partial view of a variant of a third configuration of the annular row of downstream stator blades of Figure 4;
- Figure 9 includes Figure 9a which is a circumferentially extended schematic partial view of a fourth configuration of the annular row of downstream stator blades of Figure 4 and Figure 9b which represents a detail of embodiment of the fourth configuration of the annular row of downstream stator blades;
- Figure 2 represents a propulsion assembly for an aircraft which comprises a turbomachine 10 of longitudinal axis level of a wing of the aircraft.
- the pylon 18 can be adapted to fix the turbomachine 10 at the level of a fuselage, in particular rear, of the aircraft.
- the orientation qualifiers such as “longitudinal”, “radial” or “circumferential”, are defined with reference to the longitudinal axis X of the turbomachine 10.
- the relative qualifiers “upstream” and “downstream” are defined one with respect to the other with reference to the flow of gases in the turbomachine 10 along the longitudinal axis X.
- the turbomachine 10 comprises a hub 12.
- the hub 12 is here axisymmetric around the longitudinal axis 16 non-streamlined.
- the annular row of upstream rotor blades 14 and the annular row of downstream stator blades 16 are spaced from one another along the longitudinal axis downstream stator blades 16 indicates that the upstream rotor blades 14 and the downstream stator blades 16 are not surrounded by a nacelle, unlike conventional turbomachines 10 in which the fan is shrouded inside a nacelle.
- the annular row of upstream rotor blades 14 is movable in rotation around the longitudinal axis downstream stator blades 16 is therefore fixed around the longitudinal axis X. In other words, the downstream stator blades 16 are not rotated around the longitudinal axis downstream stator 16 respectively define an upstream helix and a downstream helix.
- FIG 4 represents the annular row of downstream stator blades 16 and Figure 3 represents one of the downstream stator blades 16 in more detail.
- Each downstream stator blade extends radially between a radially internal end 20, the latter being located at the level of (that is to say closest to) the hub 12 of the turbomachine 10, and a radially external end 21.
- the radially internal end 20 is, longitudinally, at the level of a leading edge 22 of the blade.
- the radially internal end 20 is also called the “foot” of the blade.
- the radially outer end 21 of each downstream stator blade 16 is the opposite end of the radially inner end 20 of the blade.
- the radially external end 21 is the free end of the downstream stator blade 16.
- each of the downstream stator blades 16 around the longitudinal axis X is expressed according to an angular position around the longitudinal axis hourly (here considered seen from upstream for example) whose angular positions at 12 o'clock, 3 o'clock, 6 o'clock and 9 o'clock are positioned in a conventional manner.
- the angular position at 12 o'clock is therefore positioned vertically upwards relative to the longitudinal axis X.
- the angular position at 6 o'clock is positioned vertically downwards relative to the longitudinal axis the right with respect to the longitudinal axis to an axis extending radially passing through the angular positions at 3H and 9H.
- Absolute position qualifiers such as the terms “top”, “bottom”, “left”, “right”, etc., or relative position, such as the terms “above”, “below”, “superior”, “lower”, etc., and the orientation qualifiers, such as the terms “vertical” and “horizontal” can be considered in an operational state of the turbomachine 10, typically when it is installed on an aircraft placed on the ground .
- the axis passing by the angular positions at 12 o'clock and at 6 o'clock extends in the direction of the gravitational field, i.e. vertically.
- each downstream stator blade 16 is also defined by an angle 0 measured around the longitudinal axis
- the angle 0 can be measured between an axis perpendicular to the longitudinal axis downstream stator blade 16 and the axis passing through the angular positions at 12 o'clock and 6 o'clock.
- the angular position of a downstream stator blade 16 located at the angular position at 12 o'clock is defined by an angle 0 equal to 0°
- the angular position of a downstream stator blade 16 located at the angular position at 3 o'clock is defined by an angle 0 equal to 90°
- the angular position of a downstream stator blade 16 located at the angular position at 6H is defined by an angle 0 equal to 180° (or equivalently to -180°)
- a downstream stator blade 16 located at the angular position at 9 o'clock is defined by an angle 0 equal to 270° (or equivalently to -90°).
- Each downstream stator blade 16 has a radially external radius.
- the radially external radius of a blade is the radial distance to the longitudinal axis X of the radially external end 21 of the blade. In other words, this is the maximum radius of the blade.
- each downstream stator blade 16 has an identical radially external radius which thus corresponds to the radially external radius of the downstream propeller.
- each downstream stator blade 16 defines an aerodynamic profile.
- each downstream stator blade 16 comprises a stack of sections 30 in the radial direction. One of the sections 30 is shown in Figure 3b. Each section 30 extends in a respective section plane which is perpendicular to the radial direction of extension of the corresponding downstream stator blade 16. Each section 30 comprises a leading edge 31 upstream and a trailing edge 32 downstream between which extend an intrados line 33 and an extrados line 34. Each section 30 defines an aerodynamic profile .
- Each section 30 defines an aerodynamic profile .
- each downstream stator blade 16 has a respective AC timing axis. As visible in Figure 3a, the setting axis AC of each downstream stator blade 16 is here included in a plane perpendicular to the longitudinal axis X. In particular, the setting axis AC of each downstream stator blade 16 is extends radially in the example illustrated.
- the pitch angle y of each downstream stator blade 16 corresponds to the angle formed between, on the one hand, a first axis A1 which is defined by the intersection between the plane section of a reference section 30 among the stack of sections 30 of the downstream stator blade 16 and a plane perpendicular to the longitudinal axis on the other hand, the chord C of the reference section 30 of the downstream stator blade 16.
- the pitch angle is measured there on the upstream side of the plane perpendicular to the longitudinal axis X which includes the pitch axis AC of the blade downstream stator 16.
- the pitch angle is measured positively in a direction going from the first axis A1 to the chord C of the reference section 30, and more particularly in a direction coinciding with the direction going from the intrados line 33 towards extrados line 34.
- each downstream stator blade 16 is here located, on the corresponding downstream stator blade 16, at a radial distance from the longitudinal axis X which corresponds to 75% of the radially external radius of the downstream stator blade 16 corresponding.
- a first downstream stator blade 16 is said to be “closed-pitch” relative to a second downstream stator blade 16 when it has a pitch angle less than the pitch angle of the second downstream stator blade 16. Conversely, a first downstream stator blade 16 is said to be “open-pitch” relative to a second downstream stator blade 16 when it has a pitch angle greater than the pitch angle of the second downstream stator blade 16.
- the solidity of the annular row of downstream stator blades 16, defined as the ratio between the chord C, and the spacing in the circumferential direction between two circumferentially consecutive downstream stator blades 16, can be less than or equal to 3 on the the entire radial dimension of each downstream stator blade 16. In particular, in a preferred embodiment, the solidity is less than or equal to 1 at a radially external end 21 of each downstream stator blade 16.
- the ratio between, on the one hand, the distance L in the longitudinal direction separating a median plane PAM of the annular row of upstream rotor blades 14 and a median plane PAV of the annular row of downstream stator blades, and on the other hand, the diameter D of the turbomachine 10 can vary between 0.01 and 0.8, preferably between 0.1 and 0.5.
- the median plane PAM, PAV of each annular row of blades is here normal to the longitudinal axis corresponding annular row.
- the diameter D of the turbomachine 10 corresponds here to the diameter of the upstream propeller.
- the trailing edge of each of the blades of the upstream annular row 14 is located longitudinally upstream of a leading edge 22 of each of the blades of the downstream annular row 16.
- the pylon 18 has a radially internal end 20 by which it is connected to the hub 12 of the turbomachine 10.
- the pylon 18 extends generally radially in that it extends in a direction comprising at least one radial component . It is not excluded that the pylon 18 extends in a direction also comprising a longitudinal component and/or a circumferential component. In the example of Figure 2, the pylon extends in a direction comprising a radial component and a longitudinal component.
- the pylon 18 comprises a leading edge 41 and a trailing edge 42 between which extend on each side in the circumferential direction an extrados face 44 and an intrados face 43.
- the extrados face 44 and the intrados face 43 of the pylon 18 are, at least on an upstream part of the pylon 18, arranged circumferentially on each side of a radial plane defined by the longitudinal axis X and a radial axis passing through the leading edge 41 of the radially internal end of the pylon 18.
- the pylon 18 has an aerodynamic profile.
- the pylon 18 is positioned around the axis of rotation at an angular position at 12 o'clock around the longitudinal axis fixing the turbomachine 10 under the wing of the aircraft.
- the pylon 18 is arranged longitudinally downstream of the annular row of downstream stator blades 16.
- the pylon 18 is arranged longitudinally partly downstream of the annular row of downstream stator blades 16.
- the pylon 18 is also arranged circumferentially, in part, between two circumferentially adjacent downstream stator blades 16.
- the annular row of downstream stator blades comprises:
- each downstream stator blade of the first type 16a being located around the longitudinal axis X in a first angular sector S1 around the longitudinal axis fixed, and
- each downstream stator blade of the second type 16b being located around the longitudinal axis variable.
- Each downstream stator blade of the second type 16b is pivotally mounted around the respective timing axis AC.
- the turbomachine 10 may include means for driving each of the downstream stator blades of the second type 16b independently or together in rotation around the respective AC timing axis. These means can be arranged radially inside the hub 12.
- each downstream stator blade of the second type 16b can be connected, at its radially internal end 20, to a wedging arm which is adapted to rotate around the AC timing axis of the downstream stator blade of the second type 16b.
- Each downstream stator blade of the second type 16b can thus be rotated around the respective timing axis AC to change the angle of incidence of the air flow on the downstream stator blade of the second type 16b.
- the rotational adjustment of each downstream stator blade of the second type 16b around the respective AC timing axis can be carried out as a function of the incidence of the turbomachine 10 and/or of the operating points which vary according to the operating phase of the aeronautical propeller (for example landing phase and/or take-off phase), and/or depending on the air flow conditions taken locally at the level of the downstream stator blade 16.
- the local air flow conditions at the level of each downstream stator blade may depend, depending on the position of the downstream stator blade of the second type 16b around the longitudinal axis an aircraft on which the turbomachine 10 is mounted (mast, fuselage, wing, slat, flaps, etc.). This allows, of a on the one hand, to reduce the noise level emitted by the turbomachine 10, and on the other hand, to improve the aerodynamic performance of the annular row of downstream stator blades 16.
- the annular row of stator blades comprises 4 downstream stator blades of the first type 16a.
- the first angular sector S1 is here centered on the angular position at 12 o'clock.
- the first angular sector S1 in which the stator blades of the first type 16a are arranged here extends over an angular range less than 120°.
- the annular row of stator blades also comprises 8 downstream stator blades of the second type 16b.
- the downstream stator blades of the second type 16b are each arranged in a second angular sector S2 which is distinct from the first angular sector S1.
- first angular sector S1 and the second angular sector S2 are complementary in that they extend over angular ranges whose sum is equal to 360°.
- the annular row of downstream stator blades comprises another plurality of stator blades of the first type (i.e. with fixed pitch) each located in a third angular sector around the longitudinal axis X which is distinct from the first angular sector S1 and the second angular sector S3.
- Figure 5 represents a first configuration of the annular row of downstream stator blades 16.
- each downstream stator blade of the first type 16a has an identical pitch angle. This simplifies the manufacturing of the propulsion assembly.
- the annular row of downstream stator blades comprises a first set E1 of downstream stator blades of the first type 16a and a second set E2 of downstream stator blades of the first type 16a.
- Each downstream stator blade of the first type 16a of the first set E1 has identical first dimensional characteristics (i.e. a first identical aerodynamic profile) and each downstream stator blade of the first type 16a of the second set E2 has identical second dimensional characteristics (i.e. a second profile identical aerodynamics).
- each downstream stator blade of the second type 16b has identical dimensional characteristics (i.e. an identical aerodynamic profile).
- FIG. 6a is a graph which illustrates a first variant of the first configuration of the annular row of downstream stator blades.
- the graph represents the pitch angle y of each of the downstream stator blades 16 as a function of the angle 0 associated with the circumferential angular position of the blade around the longitudinal axis.
- each downstream stator blade of the second type 16b whose angular position is defined by an angle 0 between 0° and 180° has a pitch angle y determined as a function of the angular position of the downstream stator blade of the second type 16b around the longitudinal axis X according to a linear law.
- the annular row of downstream stator blades comprises another downstream stator blade of the second type 16b positioned angularly around the longitudinal axis X at an angle - 0 and having an identical setting angle y.
- the difference between the pitch angle y of two downstream stator blades can be less than 120°, preferably less than 60°.
- the difference between the pitch angle y of two circumferentially consecutive downstream stator blades of the second type 16b may be less than 20°, preferably less than 15°.
- Figure 6b is a graph which illustrates a second variant of the first configuration of the annular row of downstream stator blades.
- the graph here also represents the pitch angle y of each of the downstream stator blades as a function of the angle 0 associated with the angular position of the blade.
- the pitch angle y of each downstream stator blade of the second type 16b is different from the pitch angle y of the other downstream stator blades of the second type, in particular so that the angle of timing y of each downstream stator blade of the second type 16b is adapted to the incidence of the turbomachine 10 or to the point of flight.
- each downstream stator blade of the second type 16b is different from the pitch angle y of the circumferentially adjacent downstream stator blade(s) of the second type. This makes it possible to reduce the correlation of the noise sources and therefore makes it possible to reduce the noise level emitted by the turbomachine 10.
- Figure 6c is a graph which illustrates a third variant of the first configuration of the annular row of downstream stator blades.
- the graph here also represents the pitch angle y of each of the downstream stator blades 16 as a function of the angle 0 associated with the circumferential angular position of the blade around the longitudinal axis.
- the pitch angle y of each downstream stator blade of the second type 16b is identical. This simplifies the design and makes the system for changing the timing of the downstream stator blades of the second type 16b more robust.
- Figure 7 represents a second configuration of the annular row of downstream stator blades.
- the pitch angle y of each blade downstream stator blade of the first type 16a is different from the pitch angle y of the other downstream stator blades of the first type 16a.
- This makes it possible to adapt certain dimensional characteristics of the stator blades of the first type 16a in order to ensure that the air flow can bypass the pylon without degrading the aerodynamic behavior (that is to say, without separations, without zones recirculation, etc.) around the stator blades of the first type 16a.
- This also makes it possible to reduce the noise level emitted by the turbomachine 10.
- the difference between the pitch angle y of two downstream stator blades of the first type 16a can be less than 120°, preferably less than 60°.
- the difference between the pitch angle y of two circumferentially consecutive downstream stator blades of the first type 16a may be less than 45°, preferably less than 15°.
- the difference between the pitch angle y of two circumferentially consecutive downstream stator blades of the second type 16b may be less than the difference between the pitch angle y of two circumferentially consecutive downstream stator blades of the first type 16a.
- each downstream stator blade of the first type 16a can be determined as a function of the angular position of the downstream stator blade of the first type 16a around the longitudinal axis X, in particular according to a linear law, parabolic, sinusoidal, logarithmic, or exponential.
- the annular row of downstream stator blades comprises:
- first group G1 comprising two circumferentially adjacent downstream blades of the first type 16a which each have a downstream end located circumferentially on the same side as the extrados face 44 of the pylon 18 with respect to the radial plane, the first group G1 comprising the stator blade downstream of the first type 16a which is closest circumferentially to the radial plane and whose downstream end is located circumferentially on the same side as the extrados face 44 of the pylon 18 with respect to the radial plane,
- each downstream stator blade of the first type 16a of the first group G1 is in a closed-pitch configuration relative to the downstream stator blades of the first type 16a of the second group G2.
- each downstream stator blade of the first type 16a of the second group G2 is in an open-wedge configuration relative to the downstream stator blades of the first type 16a of the first group G1.
- Such an arrangement makes it easier to bypass the flow around the pylon 18, thus reducing a rise in pressure distortion between the pylon 18 and the downstream stator blades of the first type 16a, and avoiding separation of the boundary layers and the formation of recirculation zones on the downstream stator blades of the first type 16a which would increase aerodynamic losses and noise levels.
- each downstream stator blade of the first type 16a has different dimensional characteristics (i.e. a different aerodynamic profile) from the other downstream stator blades.
- FIG. 8 represents a third configuration of the annular row of downstream stator blades 16.
- each downstream stator blade of the first type 16a has identical dimensional characteristics (i.e. an identical aerodynamic profile). This simplifies the manufacturing of the propulsion assembly.
- each downstream stator blade of the first type 16a may have an identical pitch angle y (FIG. 8a), or the pitch angle y of each downstream stator blade of the first type 16a may be different from the angle of timing y of one or more of the other downstream stator blades of the first type 16a ( Figure 8b).
- Figure 9 represents a fourth configuration of the annular row of downstream stator blades.
- the pylon 18 is connected to one of the downstream stator blades so as to form a unitary aerodynamic assembly. This reduces the drag forces linked to the pylon 18 and allows the integration of a downstream stator blade 16 at the angular position of the pylon 18.
- each downstream stator blade has identical dimensional characteristics (ie an identical aerodynamic profile) on an upstream end portion which extends longitudinally over a relative chord length C of between 5% and 50%.
- dimensional characteristics ie an identical aerodynamic profile
- each section 30 of one of the downstream stator blades there exists a corresponding section 30 of another among the downstream stator blades which is arranged at the same radial distance from the longitudinal axis presents the same aerodynamic profile over a relative length of chord C of section 30 of between 5% and 50%, preferably between 10% and 30%.
- the pylon 18 also has an upstream end portion having identical dimensional characteristics (i.e. an identical aerodynamic profile) to those of the identical upstream end portions of the downstream stator blades.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2202171A FR3133368B1 (fr) | 2022-03-11 | 2022-03-11 | Ensemble propulsif pour un aeronef |
| PCT/FR2023/050293 WO2023170357A1 (fr) | 2022-03-11 | 2023-03-03 | Ensemble propulsif pour un aeronef |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4490039A1 true EP4490039A1 (fr) | 2025-01-15 |
Family
ID=81648694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23714233.6A Pending EP4490039A1 (fr) | 2022-03-11 | 2023-03-03 | Ensemble propulsif pour un aeronef |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250188951A1 (fr) |
| EP (1) | EP4490039A1 (fr) |
| CN (1) | CN118973909A (fr) |
| FR (1) | FR3133368B1 (fr) |
| WO (1) | WO2023170357A1 (fr) |
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| US12448142B1 (en) | 2024-10-17 | 2025-10-21 | General Electric Company | Electric propulsion system for a flight vehicle |
| CN119426982B (zh) * | 2025-01-09 | 2025-05-27 | 中国航发商用航空发动机有限责任公司 | 一种发动机桨距角调节装置及调节方法 |
| US12571405B1 (en) | 2025-02-26 | 2026-03-10 | General Electric Company | Propulsor assembly for a turbine engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201114380D0 (en) * | 2011-08-22 | 2011-10-05 | Rolls Royce Plc | An aircraft propulsion system and a method of controlling the same |
| FR3025247B1 (fr) * | 2014-08-29 | 2016-11-11 | Snecma | Roue aubagee a calages variables |
| ES2835263T3 (es) * | 2016-12-20 | 2021-06-22 | Airbus Operations Sl | Sistema de propulsión rotativo de una aeronave |
| US11401824B2 (en) * | 2019-10-15 | 2022-08-02 | General Electric Company | Gas turbine engine outlet guide vane assembly |
| FR3112809B1 (fr) * | 2020-07-23 | 2022-07-29 | Safran Aircraft Engines | Module de turbomachine equipe d’une helice et d’aubes de stator supportees par des moyens de maintien et turbomachine correspondante |
-
2022
- 2022-03-11 FR FR2202171A patent/FR3133368B1/fr active Active
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2023
- 2023-03-03 WO PCT/FR2023/050293 patent/WO2023170357A1/fr not_active Ceased
- 2023-03-03 US US18/845,636 patent/US20250188951A1/en active Pending
- 2023-03-03 EP EP23714233.6A patent/EP4490039A1/fr active Pending
- 2023-03-03 CN CN202380032849.4A patent/CN118973909A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023170357A1 (fr) | 2023-09-14 |
| FR3133368A1 (fr) | 2023-09-15 |
| CN118973909A (zh) | 2024-11-15 |
| FR3133368B1 (fr) | 2024-08-02 |
| US20250188951A1 (en) | 2025-06-12 |
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