EP4452750A1 - Déclenchement à distance d'une extinction en zone feu d'un système propulsif - Google Patents
Déclenchement à distance d'une extinction en zone feu d'un système propulsifInfo
- Publication number
- EP4452750A1 EP4452750A1 EP22847604.0A EP22847604A EP4452750A1 EP 4452750 A1 EP4452750 A1 EP 4452750A1 EP 22847604 A EP22847604 A EP 22847604A EP 4452750 A1 EP4452750 A1 EP 4452750A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- extinguisher
- activation
- activation device
- control unit
- order
- 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
- B64D29/00—Power-plant nacelles, fairings or cowlings
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
- A62C3/08—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles in aircraft
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/04—Control of fire-fighting equipment with electrically-controlled release
-
- 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
- B64D45/00—Aircraft indicators or protectors not otherwise provided for
-
- 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
- F02C7/24—Heat or noise insulation
- F02C7/25—Fire protection or prevention
-
- 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
- B64D45/00—Aircraft indicators or protectors not otherwise provided for
- B64D2045/009—Fire detection or protection; Erosion protection, e.g. from airborne particles
Definitions
- the present invention relates to an assembly for an aircraft propulsion system, comprising a nacelle and a fire extinguisher mounted on the nacelle, as well as an aircraft comprising such an assembly.
- the present invention also relates to a method for activating an extinguisher adapted to be implemented by means of such an assembly.
- An aircraft conventionally comprises at least one propulsion system to provide propulsion.
- the propulsion system can be a turbomachine, for example a turbojet or a turboprop, or can be a hybrid or electric motor.
- the turbomachine comprises a fan, at least one compressor, a combustion chamber, at least one turbine, and a gas exhaust nozzle.
- the turbomachine may include a low pressure compressor and a high pressure compressor, and a high pressure turbine and a low pressure turbine.
- a turbojet engine can be a turbofan engine, in which the mass of air sucked in by the fan is divided into a primary flow, which passes through the at least one compressor, the combustion chamber and the at least one turbine, and a secondary flow, which is concentric with the primary flow.
- the propulsion system is housed in a nacelle.
- the nacelle is fixed to a pylon, or mast, which supports the propulsion system, the pylon itself being fixed under a wing of the aircraft.
- a nacelle 1 can comprise an air inlet upstream of the turbomachine 2, the upstream and the downstream being defined with respect to the direction of the gas flow in the turbomachine 2 in operation, a fan casing 15 surrounding the fan of the turbomachine 2, an intermediate casing at least partially surrounding a compressor of the turbomachine 2, and an internal fixed structure 11 (in English “IFS”: Internal Fixed Structure).
- the fixed internal structure 11 surrounds at least the combustion chamber of the turbomachine 2.
- the exhaust nozzle 23 of the turbomachine is located downstream of the fixed internal structure 11 .
- a fire zone of the propulsion system corresponds to a zone in which it is necessary to be able to extinguish a fire that breaks out there.
- a fire zone is thus defined by the possible presence of a flammable fluid (oil, kerosene, hydraulic oil, etc.) simultaneously with an ignition source (electrical circuit, hot parts, source of sparks, etc.).
- the fixed internal structure of the nacelle and the combustion chamber of the turbomachine can delimit a so-called “hot” fire zone.
- This hot fire zone is subjected to high temperatures during operation of the turbomachine, typically greater than 110° C., for example which can be around 250° C. or even 500° C., including in the absence of fire in the turbomachine. .
- the fan casing 15 of the nacelle and the fan define a so-called “cold” fire zone.
- This cold fire zone is subjected during operation of the turbomachine in the absence of fire to temperatures lower than those of the hot fire zone.
- extinguishing devices are conventionally mounted under the wing of the aircraft, close to the pylon on which the propulsion system is mounted, or directly under the pylon, so as to be carried by the pylon or by the wing.
- These extinguishing devices may consist of spherical pressurized gas cylinders, which resist the internal pressure by limiting the mass of the cylinder: for example, they may be cylinders distributed under the pylon and containing Halon, which is a bromotrifluoromethane gaseous agent.
- FIG. 2 illustrates such an extinguishing device comprising spherical pressurized gas cylinders 3′ mounted under the wing 500 of the aircraft, close to the pylon 600.
- extinguishing devices also include a control unit, mounted on the pylon or on the wing near the spherical pressurized gas cylinders, and connected to them by an electric cable.
- the pilot informed of the fire when the fire sensors detect a fire in the propulsion system, can trigger an extinction by sending a command from the cockpit to the control unit.
- the command is transmitted from the control unit to the spherical pressurized gas cylinders via the electric cable.
- the spherical pressurized gas cylinders sprinkle the fire zone affected by the fire.
- the extinguishing agent is injected through the upper part of the nacelle, in a position which may be relatively far from the fire to be extinguished.
- a large quantity of extinguishing agent must be injected in order to submerge the fire zone in order to extinguish the fire, which generates significant losses of extinguishing agent.
- Pipes can be put in place to convey the extinguishing agent from the cylinders to the fire zone(s) concerned by the fire, in order to inject the extinguishing agent as close as possible to the fire.
- Halon is a gas with a very high greenhouse effect, and therefore very polluting. It therefore tends to be replaced by other less polluting extinguishing agents, such as NOVEC 1230, also called FK-5-1 -12, which is a liquid agent which gasifies at the outlet of a spray nozzle.
- extinguishing devices are suitable for injecting a liquid extinguishing agent other than Halon through a pressurized syringe.
- document FR 3,077,989 A1 describes an extinguishing device comprising a storage tank for an extinguishing agent, a variable-volume chamber, a piston located between the tank and the variable-volume chamber, and a generator of gas configured to pressurize the extinguishing agent in order to distribute it outside the tank.
- these devices require an activation energy of the order of a few Watts. This activation energy triggers the ignition of the gas generator.
- the gas generator then injects a propellant gas into the variable volume chamber, causing the piston to move which tends to force the extinguishing agent out of the tank via the nozzle.
- the activation energy is supplied to the gas generator from the control unit via an electric cable which connects the control unit to the gas generator.
- extinguishing devices such as that described in document FR 3,060,652 A1, provide for smothering the fire in fire zones of a nacelle by constriction, using a gas generator adapted to move a wall extinguishing hose towards the fire area of the nacelle, in order to dispense with chemical extinguishing agents.
- document FR 3,041,936 A1 describes an extinguishing device comprising an extinguishing agent reservoir located at the upstream section or the middle section of the nacelle.
- the extinguishing agent can be released by the explosion of a pyrotechnic cartridge, generating pressurized gas. Nevertheless, the extinguishing device is then located far from the so-called "hot" fire zone of the nacelle, and the extinguishers are not configured to inject the extinguishing agent there. Consequently, this extinguishing device does not make it possible to effectively extinguish a fire breaking out in this hot fire zone.
- Extinguishing a fire in a hot fire zone would mean adding complex pipes to connect the extinguisher to the fixed internal structure of the nacelle.
- the extinguishing device itself could not be moved at the level of the fixed internal structure of the nacelle, because it has a limited resistance to high temperatures, and would not withstand the temperatures to which the hot fire zone is subjected. from the nacelle.
- the extinguisher is then mounted on the nacelle, therefore remote from the control unit which is mounted on the pylon.
- the electrical cable that transmits the activation order from the control unit to the extinguisher connects the control unit mounted on the pylon to the extinguisher mounted on the nacelle. Consequently, this extinguishing device complicates maintenance when the propulsion system and/or the nacelle must be dismantled. Indeed, the control unit mounted on the pylon is not impacted by the dismantling of the propulsion system, i.e. it remains in place during the dismantling of the propulsion system.
- the extinguisher since the extinguisher is mounted on the nacelle, it must be dismantled with the nacelle or the propulsion system. Therefore, the electrical cable that connects the control unit and the extinguisher must be disconnected when dismantling the propulsion system or a component of the propulsion system on which the extinguisher is mounted, then reconnected when reassembling at the end of the 'maintenance operation.
- a disconnected or incorrectly reconnected cable would pose significant safety problems, since it could make it impossible to take off or cause accidents by preventing the triggering of an extinction.
- This extinguishing device therefore adds complexity to the maintenance operation, in that it requires a step of disconnecting the cable, a step of connecting the cable, and a step of verifying the correct connection of the cable at the end of the operation. 'maintenance operation. In addition, this extinguishing device creates risks for the safety of passengers.
- An objective of the present invention is to propose an assembly adapted to ensure extinguishing in a fire zone of a propulsion system, which does not complicate the maintenance operations of the propulsion system and does not degrade the safety of the extinction.
- the invention relates to an assembly for an aircraft propulsion system, comprising:
- a nacelle extending around a longitudinal axis and adapted to be arranged around the propulsion system, said nacelle comprising an internal face adapted to delimit with an external face of the propulsion system a fire zone;
- an extinguisher configured to extinguish a fire in the fire zone, the extinguisher comprising a tank adapted to contain an extinguishing agent, and a spray nozzle configured to expel the extinguishing agent out of the tank and into the fire zone ;
- control unit adapted to transmit a control order to the activation device
- the activation device being adapted to receive the control order transmitted by the control unit and to transmit an activation order to the extinguisher in response to receiving the control order, said activation order being suitable for activating the extinguisher so as to cause the expulsion of the extinguishing agent through the nozzle
- the assembly being characterized in that that the extinguisher is mounted on the nacelle, and in that it further comprises at least one of the following elements for transmitting the control order from the control unit to the activation device:
- the wireless communication means between the control unit and the activation device comprises at least one of the following elements: a means of communication by radio signal, for example of the Wi-Fi type, Wireless Avionics Intra-Communications , and/or RFID; a means of communication by light signal, for example of the laser type, Visible light communication, Li-Fi, and/or opto-electronic system; a wave communication means, for example of the microwave type, said wave being adapted to be transmitted to the structure of the nacelle;
- control order transmission element is a wireless communication means and is further configured to determine whether the control unit and the activation device are within communication range;
- the extinguisher further comprises a variable volume chamber, a piston located between the reservoir and the variable volume chamber, and a gas generator configured to inject a propellant gas in the variable-volume chamber, said injection of propellant gas being able to generate a movement of the piston to pressurize the extinguishing agent;
- the transmission element includes a cable
- the activation device includes the gas generator
- the cable connects the control unit and the extinguisher gas generator
- the assembly comprises several extinguishers, the activation device being suitable for selectively activating one or more of the extinguishers of the assembly, for example by means of: different elements for transmitting the activation order depending on the extinguishers , different activation order transmission frequencies depending on the extinguishers, and/or different identifiers depending on the extinguishers;
- the activation order transmitted by the activation device to the extinguisher comprises a wave having an energy greater than or equal to an activation energy of the extinguisher
- the activation order transmitted by the activation device to the extinguisher comprises a wave having an energy strictly lower than an activation energy of the extinguisher, and the activation device further comprises a source of local energy adapted to activate the extinguisher in response to receipt of the activation order;
- the assembly also includes a pylon, the nacelle being fixed to the pylon.
- the invention relates to an aircraft comprising an assembly according to the first aspect, a propulsion system, a wing, and a pylon fixed under the wing of the aircraft, the nacelle being fixed to the pylon.
- control unit is mounted on the pylon.
- the invention relates to a method for activating an extinguisher adapted to be implemented by means of an assembly according to the first aspect, said method comprising the following steps:
- Figure 1a is an exploded view of a nacelle and a propulsion system of an aircraft according to the prior art.
- Figure 1b is a side view of a nacelle and of a propulsion system of an aircraft according to the prior art.
- Figure 2 already commented on, is a wire perspective view of an extinguisher assembly for an aircraft according to the prior art.
- FIG. 3 is a schematic side view of an assembly according to one embodiment of the invention comprising two pairs of two extinguishers adapted to be activated by optical fiber, and of a propulsion system.
- FIG. 4 is a schematic side view of an assembly according to one embodiment of the invention comprising two pairs of two extinguishers adapted to be activated by wireless communication, and of a propulsion system.
- Figure 5 is a schematic side view of an extinguisher of an assembly according to one embodiment of the invention, adapted to be activated by a local energy source.
- Figure 6 is a schematic side view of a fire extinguisher of an assembly according to one embodiment of the invention, adapted to be activated by an aircraft energy source.
- Figure 7 is a schematic side view of an extinguisher of an assembly according to one embodiment of the invention, mounted on an internal face of a fixed internal structure of the nacelle.
- the assembly comprises:
- a nacelle 1 extending around a longitudinal axis and adapted to be arranged around the propulsion system 2, said nacelle 1 comprising an internal face 12 adapted to delimit with an external face of the propulsion system 2 a fire zone 100, 200; - an extinguisher 3 designed to extinguish a fire in the fire zone 100, 200, the extinguisher 3 comprising a tank adapted to contain an extinguishing agent, and a spray nozzle 36 configured to expel the extinguishing agent out of the tank and in the fire zone 100, 200;
- control unit adapted to transmit a control order to the activation device 81
- the activation device 81 being adapted to receive the control order transmitted by the control unit and to transmit an activation order to the extinguisher 3 in response to the reception of the control order, said activation order being suitable for activating the extinguisher 3 so as to cause the expulsion of the extinguishing agent through the nozzle 36.
- the assembly is characterized in that the extinguisher 3 is mounted on the nacelle 1, and in that it further comprises at least one of the elements for transmitting the control order from the control unit to the activation device 81 following:
- the propulsion system can be a turbomachine, for example a turbojet or a turboprop, or can be a hybrid or electric motor.
- the upstream and the downstream are defined with respect to the propulsion system, in particular with respect to the normal flow direction of the gas through the turbomachine.
- the longitudinal axis along which the nacelle 1 mainly extends corresponds to an axis of the propulsion system, in particular to an axis of rotation of the fan of the turbomachine.
- a radial axis is an axis perpendicular to the longitudinal axis and passing through it.
- a transverse axis is an axis perpendicular to the longitudinal axis and not passing through it.
- a longitudinal direction, respectively a radial and transverse direction corresponds to the direction of the longitudinal axis, respectively of the radial and transverse axis.
- inner and outer are used with reference to a radial direction such that the inner part or face of an element is closer to the longitudinal axis than the outer part or face of the same element.
- the turbomachine may for example be a turbojet or a turboprop.
- the turbomachine comprises a fan, at least one compressor, a combustion chamber, at least one turbine, and a gas exhaust nozzle.
- the turbomachine may include a low pressure compressor and a high pressure compressor, and a high pressure turbine and a low pressure turbine.
- a turbojet engine can be a turbofan engine, in which the mass of air sucked in by the fan is divided into a primary flow which passes through the at least one compressor, the combustion chamber and the at least one turbine, and a flow secondary which is concentric with the primary flow.
- the primary flow circulates in a primary vein Vp and the secondary flow circulates in a secondary vein Vs.
- the propulsion system 2 is housed in a nacelle 1 .
- the fan can therefore be shrouded.
- the nacelle 1 is fixed to a pylon 600, or mast, which supports the propulsion system 2, said pylon 600 being fixed under a wing 500 of the aircraft.
- the nacelle 1 can comprise an air inlet adapted to be arranged upstream of the turbomachine 2, a fan casing 15 adapted to surround the fan, an intermediate casing adapted to surround at least one compressor of the turbomachine 2, and a structure fixed internal structure 11 (in English “IFS”: Internal Fixed Structure) adapted to surround at least the combustion chamber of the turbomachine 2.
- the fixed internal structure 11 can also surround all or part of the compressor and/or turbine stages of the turbomachine 2.
- the intermediate casing can be located in the immediate extension of the fixed internal structure 11 .
- the gas exhaust nozzle 23 of the turbomachine 2 is located downstream of the fixed internal structure 11 .
- a fire zone 100, 200 of the propulsion system 2 corresponds to a zone in which it is necessary to be able to extinguish a fire that would break out there.
- a fire zone 100, 200 is thus defined by the possible presence of a flammable fluid (oil, kerosene, hydraulic oil, etc.) simultaneously with an ignition source (electrical circuit, hot parts, source of sparks, etc.). ).
- a so-called "hot" fire zone 200 of a nacelle 1 of a turbomachine is delimited by an internal face 12 of the fixed internal structure 11 and an external face of the combustion chamber of the turbomachine 2, as illustrated in the figure 1 b already commented.
- This hot fire zone 200 extends upstream as far as the partition of the central intermediate casing of the turbomachine 2 and downstream as far as the annular ventilation outlet constituted by the rear part of the fixed internal structure 11 of the nacelle 1 and the external part of the nozzle 23.
- This hot fire zone 200 is subjected to high temperatures during normal operation of the turbomachine 2, that is to say in the absence of fire, typically above 110° C., for example which can be around 250°C or even 500°C.
- a so-called "cold" fire zone 100 of a nacelle 1 of a turbomachine is delimited by an internal face of the fan casing 15 and/or of the intermediate an external face of the fan and/or the compressor.
- the cold fire zone 100 is subjected to normal operation of the turbomachine 2, that is to say in the absence of fire, at temperatures lower than those of the hot fire zone 200.
- the extinguisher 3 of the assembly described above is mounted on the nacelle 1, in particular on an internal face 12 of the nacelle 1, and is therefore carried by the nacelle 1, and not by the wing 600 or the pylon 500 as in the prior art.
- the extinguisher 3 can in particular be mounted inside the nacelle 1 .
- the extinguisher 3 no longer clutters up the space at the level of the pylon 500, which makes it possible to optimize its positioning and its dimensions with more flexibility.
- the extinguisher 3 is mounted on the nacelle 1, close to the fire zone 100, 200, or even in the fire zone 100, 200. This makes it possible to position the nozzle 36 in the fire zone 100, 200. Thus, the agent Extinguishing agent is expelled through nozzle 36 directly into the fire zone 100, 200, without the need for long, complex and heavy pipes to distribute the extinguishing agent from the extinguisher tank 3 to the fire zone 100 , 200, and without loss of extinguishing agent between the injection point and the fire zone 100, 200. Thus, the extinguishing efficiency is improved due to the mounting of the extinguisher 3 on the nacelle 1 .
- the set can be used to put out a fire in any fire zone 100, 200 of the pod 1 of the pro system, in particular can be used to put out a fire in the cold fire zone 100 or in the zone hot fire 200 from nacelle 1 of a turbomachine.
- the control unit is mounted on an element external to the nacelle 1 and located at a distance from the nacelle 1.
- the control unit can for example be mounted on the pylon 500 or in the cockpit.
- the activation device 81 can be mounted for example on the pylon 500, or on the nacelle 1.
- An activation device 81 mounted on the nacelle 1 makes it possible not to have to connect or disconnect transmission elements between the device activation 81 and the extinguisher 3 when the nacelle 1 or the propulsion system 2 is disassembled or assembled.
- the transmission of the control order and/or the activation order between the control unit and the extinguisher 3 is carried out by a cable, and the assembly further comprises a system for detecting a disconnected state of the cable.
- the cable can for example be an electric cable, or an optical fiber.
- the control unit can then communicate with the activation device 81, in particular can transmit the control order to the activation device 81, by an electric or light signal.
- the cable is disconnected, it does not allow communication to be established between the control unit and the activation device 81.
- the assembly according to the first embodiment makes it possible to maintain the same level of safety, to limit the complexity of the maintenance operation, and to improve the effectiveness of the extinction, compared to an extinguisher 3 mounted on the pylon 500.
- the control unit when it is mounted on the pylon 500 is not impacted by the dismantling of the propulsion system 2, that is to say that it remains in place during the dismantling of the propulsion system 2.
- the extinguisher 3 being mounted on the nacelle 1, it must be dismantled with the nacelle 1 or the propulsion system 2.
- the cable which connects the control unit and the extinguisher 3 must be disconnected during disassembly of the propulsion system 2 or of a component of the propulsion system 2 on which the extinguisher 3 is mounted, then reconnected during reassembly at the end of the maintenance operation.
- Verification of the correct connection of the cable is carried out by the detection system, which automatically alerts the user when the cable is disconnected, for example that the operator has forgotten to reconnect it, or has reconnected it incorrectly, after the operation of maintenance. Consequently, the complexity of the maintenance operation is limited to the fact of disconnecting and reconnecting the cable, but does not also require verification of the correct connection of the cable at the end of the maintenance operation.
- this extinguishing device makes it possible to maintain the same level of passenger safety, since the risk of incorrect connection of the cable is eliminated due to the presence of the detection system. Finally, extinguishing efficiency is improved by the fact that the extinguisher 3 is mounted on the nacelle 1 .
- the transmission of the control order and/or of the activation order between the control unit and the extinguisher 3 is carried out by the wireless communication means.
- the assembly according to the second embodiment makes it possible to facilitate the maintenance of the aircraft, to maintain the same level of safety for the passengers and to improve the effectiveness of the extinction, compared to an extinguisher 3 mounted on the pylon 500. Indeed, the extinguishing efficiency is improved due to the fact that the extinguisher 3 is mounted on the nacelle 1.
- the connection between the pylon 500 and the nacelle 1 is eliminated, since the order of control is transmitted remotely from the control unit, if necessary mounted on the pylon 500, to the activation device 81.
- One or more, or even all, of the elements of the assembly can be the test of fire.
- these elements can be fireproof due to their intrinsic design, for example their material and/or their internal design, or due to the protections against the fire environment added to these elements.
- the assembly remains functional even if a fire breaks out in the propulsion system 2, during and after the fire.
- the nacelle 1 can comprise an outer face 13 radially opposite to the inner face 12.
- the outer face 13 of the nacelle 1 can be adapted to delimit an air flow space on the outside, such as a portion of vein secondary Vs of the turbomachine 2 or a flow of ambient air outside the aircraft.
- air in particular fresh air, circulates in contact with and outside the outer face 13 of the nacelle 1 .
- the extinguisher 3, illustrated by way of non-limiting example in FIGS. 5 to 7, may also comprise a variable-volume chamber 32, a piston 33 located between the reservoir 31 and the variable-volume chamber 32, and a generator of gas 34 configured to inject a propellant gas into the variable-volume chamber 32, said injection of propellant gas being able to generate a movement of the piston 33 to pressurize the extinguishing agent.
- the extinguisher 3 may comprise a substantially cylindrical body 37 delimiting the reservoir 31 and the variable-volume chamber 32, and housing the piston 33.
- the body 37 of the extinguisher 3 comprises a substantially cylindrical body wall, said body wall being closed at one end by a disc-shaped base wall.
- the base wall, the body wall 37 and the piston 33 together delimit the reservoir 31 containing the extinguishing agent.
- An orifice can be formed in the base wall of the body 37 of the extinguisher 3, for example in a central position of said base wall.
- the orifice is connected to the spray nozzle 36, either directly or through a supply pipe 35 from the tank 31.
- the extinguishing agent contained in the tank 31 is expelled from the tank 31 via the orifice when the piston 33 puts the extinguishing agent under pressure.
- the piston 33 may comprise a disc-shaped body, adapted to be moved in translation along an axis of the cylinder of the body 37 of the extinguisher 3, by a pressure difference between the tank 31 and the variable volume chamber 32.
- the gas generator 34 forms an extinguishing agent propulsion device.
- the gas generator 34 can be housed in the substantially cylindrical body 37 of the tank 31, be attached to the variable-volume chamber 32 and open directly into the variable-volume chamber 32, so that the gas is generated directly in the chamber. variable volume 32.
- the gas generator 34 can be activated, or turned on, when an extinction is desired.
- An activation of the extinguisher 3 can correspond to an ignition of the gas generator 34.
- the ignition requires supplying the gas generator 34 with an activation energy, which is generally of the order of a few Watts.
- variable-volume chamber 32 into which the propellant gas is injected is delimited by the substantially cylindrical body wall of the extinguisher 3, the piston 33, and a partition wall with the gas generator 34.
- a volume of the chamber at variable volume 32 can vary between a zero volume, the piston 33 then being adjacent to the separation wall with the gas generator 34, in contact with said separation wall, and the volume of the reservoir 31 being maximum, and a volume corresponding to a volume of the reservoir 31, the piston 33 then being adjacent to the base wall of the body 37 of the extinguisher 3, in contact with said base wall, and the volume of the reservoir 31 being zero.
- the gas generator 34 When the gas generator 34 is activated, or ignited, it generates a generation of propellant gas in the variable-volume chamber 32, which leads to the volume of the variable-volume chamber 32 increasing as the propellant gas is released. generated, by increasing the pressure in the variable volume chamber 32.
- the movement of the piston 33 under the pressure of the propellant gas propels the extinguishing agent out of the tank 31 and towards the nozzle 36 of spray.
- the extinguishing agent can then pass through the supply pipe 35 until it reaches the nozzle 36.
- the spray nozzle 36 allows the spraying of the extinguishing agent in the fire zone 100, 200, in a jet spray 38.
- the spray jet 38 from the nozzle 36 is a jet of the extinguishing agent, and allows the vaporization and dissemination of the extinguishing agent in gaseous or two-phase form in the fire zone 100, 200.
- the extinguishing agent can be NOVEC 1230, also called FK-5-1 -12.
- NOVEC is a liquid agent which is atomized at the outlet of the nozzle 36 and gasifies at ambient temperature (20° C.).
- the Air NOVEC mixture of the quenching flow reaching saturation leads to the formation of a mist of liquid droplets of NOVEC in the quenching flow saturated with NOVEC gas.
- the nozzle 36 can inject at low temperature (for example at -30° C.) a NOVEC 1230 in the form of droplets and in gaseous form, in the fire zone 100, 200.
- the extinguisher 3 can be mounted in a radially internal position with respect to the internal face 12 of the nacelle 1, that is to say directly at the level of the fire zone 100, 200.
- the extinguisher 3, in particular the tank 31 of the extinguisher 3, can be mounted on the nacelle 1 via an extinguisher support 51.
- the extinguisher can be mounted for example on the fixed internal structure 11, the fan casing 15, and/or the intermediate casing of the nacelle 1 of the propulsion system 2.
- the extinguisher 3 of the assembly is designed to extinguish a fire in the cold fire zone 100 of the turbomachine 2.
- the extinguisher 3 can then be mounted on the fan casing 15 or on the casing intermediate of the nacelle 1, more precisely can be mounted on an internal face 12 of the fan casing 15 or of the intermediate casing of the nacelle 1 of the nacelle 1, that is to say at the level of the fan or of a compressor of the turbomachine 2.
- the extinguisher 3 is thus mounted in the cold fire zone 100 that it is designed to protect against fire.
- the operation of the extinguisher 3 is thus optimized and makes it possible in particular to reduce the length of the supply pipes for the extinguishing agent, or even to eliminate them.
- the extinguisher 3 being integrated as close as possible to the starting points of the fire to be extinguished, it can extinguish the fire at its birth, which contributes to reducing the quantity of extinguishing agent to be used to extinguish a fire declaring in the cold fire zone 100.
- the assembly may further comprise a thermal protection 4 covering the internal face 12 of the fan casing 15 or of the intermediate casing at the level of the cold fire zone 100, and the extinguisher 3 can be mounted between the thermal protection 4 and the fan casing 15 or the intermediate casing of the nacelle 1, in order to benefit from the protection of the thermal protection 4.
- the extinguisher 3 of the assembly is designed to extinguish a fire in the hot fire zone 200 of the turbomachine 2.
- the assembly then comprises in addition to a thermal protection 4 covering the internal face 12 of the fixed internal structure 11 of the nacelle 1 at the level of the hot fire zone 200.
- the thermal protection 4 can correspond to a wall consisting of a thermally insulating coating, and located in a radially more internal position than the internal face 12.
- the extinguisher 3, in particular the tank 31 of the extinguisher 3, can then be mounted on an internal face 12 of the fixed internal structure 11 of the nacelle 1, between the thermal protection 4 and the internal face 12 of the fixed internal structure 11 of the nacelle 1, that is to say at the level of the combustion chamber of the turbomachine 2.
- the thermal protection 4 is configured to at least partially delimit an enclosure adapted to house all or part of the extinguisher 3.
- the enclosure is located at the level of the hot fire zone 200 and is adapted to surround the extinguisher 3, so as to protect it from the high temperatures of the hot fire zone 200.
- the supply pipe 35 or the nozzle 36 passes through the thermal protection A, so that the extinguishing agent is expelled directly into the hot fire zone 200.
- the integration of the extinguisher 3 thus takes into account the limited resistance of the extinguisher 3 to high temperatures, and thus allows the correct operation of the extinguisher 3 in the case where the latter is used to extinguish a fire in the hot fire zone 200, without requiring any additional protection element.
- the extinguisher 3 is integrated within the very hot fire zone 200 which it is designed to protect from fire. The operation of the extinguisher 3 is thus optimized and makes it possible in particular to reduce the length of the supply pipes for the extinguishing agent, or even to eliminate them.
- the extinguisher 3 being integrated as close as possible to the starting point of the fire to be extinguished, it can extinguish the fire at its birth, which contributes to reducing the quantity of extinguishing agent to be used to extinguish a fire declaring in the 200 hot fire zone.
- the first exemplary embodiment and the second exemplary embodiment are compatible, in that the assembly can comprise one or more extinguisher(s) 3 suitable for extinguishing a fire in the cold fire zone 100 of the nacelle 1, and /or one or more extinguisher(s) 3 suitable for extinguishing a fire in the hot fire zone 200 of the nacelle 1 .
- a ventilation inlet and a ventilation outlet can be formed in the internal face 12 of the nacelle 1 so that, during operation of the propulsion system 2, a ventilation flow flows in the fire zone 100, 200 between the ventilation inlet and ventilation outlet. Indeed, any fire zone 100, 200 of a propulsion system 2 must be ventilated.
- the nozzle 36 can be located in the fire zone 100, 200 and in the ventilation flow between the ventilation inlet and the ventilation outlet. Thus, the nozzle 36 is adapted to expel the extinguishing agent so that the expelled extinguishing agent mixes with the ventilation flow to form a flow in the fire zone 100, 200 which makes it possible to optimize extinguishing the fire.
- the assembly uses the positioning of the nozzle 36 in the existing ventilation flow and the fact that the extinguisher 3 is mounted on the nacelle 1 to optimize the injection of the extinguishing agent and thus maximize the efficiency 3 fire extinguisher against the fire.
- the homogeneity of the flow of the extinguishing agent in the fire zone 100, 200 is improved. Extinguishing agent losses are thus limited.
- a position and orientation of the nozzle 36 in the fire zone 100, 200 and in the ventilation flow between the ventilation inlet and the ventilation outlet can be chosen so as to effectively shape the ventilation flow by the jet.
- spray 38 of extinguishing agent in order to optimize the flow of the extinguishing agent in the fire zone 100, 200. This makes it possible to reduce the quantity of extinguishing agent necessary to carry out an extinction in the fire zone 100, 200.
- the transmission element comprises the cable, in particular the electric cable, connecting the control unit and the activation device 81 , and the assembly further comprises the system for detecting a disconnected state of said cable, in particular of said electric cable.
- Said detection system can be adapted to automatically detect a disconnected state of the cable and to automatically alert the user in the event of a disconnected state of the detected cable.
- the assembly may comprise several activation devices 81, each activation device 81 being adapted to activate one or more respective extinguishers 3.
- Each activation device 81 is connected to the control unit by at least one cable, in particular by at least one electrical cable.
- the set of electrical cables connecting the activation devices 81 to the control unit forms an electrical harness.
- the transmission element comprises the wireless communication means.
- the control unit then comprises at least one wireless communication means suitable for transmitting the control command.
- the activation device 81 comprises at least one receiver adapted to receive the control order transmitted by the control unit, and a transmitter adapted to transmit the activation order to the extinguisher 3 in response to the reception of the control order.
- the wireless communication means may comprise any element capable of transmitting the control command from the control unit to the activation device 81.
- the control command may in particular comprise a wave adapted to be received by the receiver of the device 81, the transmitter of the activation device 81 being adapted to generate, depending on the control order received, an activation order for the extinguisher 3.
- the receiver of the activation device 81 can be any element capable of receiving the control command transmitted by the wireless communication means.
- the wireless communication means between the control unit and the activation device 81 can comprise at least one of the following elements:
- radio signal for example of the Wi-Fi, Wireless Avionics Intra-Communications (WAIC), and/or RFID type;
- - a means of communication by light signal, for example of the laser type, Visible light communication (VLC), Li-Fi, and/or opto-electronic system;
- a wave communication means for example of the microwave type, said wave being a structural wave adapted to be transmitted to the structure of the nacelle 1 .
- the receiver of the activation device 81 can comprise at least one of the following elements:
- a receiver of a radio signal for example of the Wi-Fi, Wireless Avionics IntraCommunications (WAIC), and/or RFID type;
- a receiver of a light signal for example of the optical fiber type, Visible light communication (VLC), Li-Fi, photoelectric sensor, and/or opto-electronic system;
- VLC Visible light communication
- Li-Fi Li-Fi
- photoelectric sensor for example of the optical fiber type
- opto-electronic system for example of the optical fiber type, Visible light communication (VLC), Li-Fi, photoelectric sensor, and/or opto-electronic system
- a receiver of a structural wave for example of the microwave type, for example of the generator type by piezoelectric element.
- the wireless communication means between the control unit and the activation device 81 comprises a transmitter respectively of a radio signal, of a light signal, or of a structural wave
- the device of activation 81 can comprise a receiver respectively of a radio signal, of a light signal, or of a structural wave.
- the transmitter 83 of the activation device 81 can be any element capable of transmitting the activation order intended for the extinguisher 3.
- the transmitter 83 of the activation device 81 can comprise at least one of the elements transmission of the activation order from the activation device 81 to the following extinguisher 3:
- the transmitter 83 of the activation device 81 can comprise at least one of the following elements:
- a transmitter of a radio signal for example of the Wi-Fi, Wireless Avionics IntraCommunications (WAIC), and/or RFID type;
- a transmitter of a light signal for example of the laser type, Visible light communication (VLC), Li-Fi, photoelectric sensor, and/or opto-electronic system;
- VLC Visible light communication
- Li-Fi Li-Fi
- photoelectric sensor for example of the laser type, Li-Fi, photoelectric sensor, and/or opto-electronic system
- the means of communication from the activation device 81 to the extinguisher 3 can comprise at least one of the following elements:
- a cable 82 such as an electric cable or an optical fiber 82, connecting the activation device 81 to the extinguisher 3, if necessary with a connector with automatic connection and disconnection;
- radio signal for example of the Wi-Fi, Wireless Avionics Intra-Communications (WAIC), and/or RFID type;
- VLC Visible light communication
- Li-Fi Li-Fi
- opto-electronic system type for example of the Visible light communication (VLC), Li-Fi, and/or opto-electronic system type
- a wave communication means for example of the microwave type, said wave being a structural wave adapted to be transmitted to the structure of the nacelle 1 .
- Wireless communication means between the activation device 81 and the extinguisher 3 make it possible to limit the wiring present in the nacelle 1, in particular in view of the restrictive environment in which this wiring is installed.
- the transmitter 83 of the activation device 81 can in particular be adapted to transmit to the extinguisher 3 an activation order having an energy greater than or equal to an activation energy of the extinguisher 3, for example by means of a wireless communication means, or a cable 82 such as an electric cable or an optical fiber 82.
- the extinguishing device 81 is then advantageously mounted on the nacelle 1, for example near the unit of control or even within the control unit, and communicates with the extinguisher 3 by a wireless communication means of the WAIC or microwave type suitable both for activating the extinguisher 3 and for supplying the energy to activation.
- the set can include a wireless receiver 84, for example mounted on the extinguisher
- the wireless receiver 84 of the extinguisher 3 can comprise a receiver of a radio signal, for example of the Wi-Fi, Wireless Avionics Intra-Communications (WAIC), and/or RFID type.
- the assembly may comprise a receiver of a light wave transmitted by optical fiber 82, for example mounted on the extinguisher 3, adapted to receive the light energy transmitted by the optical fiber 82 connecting the device to activation 81 and the gas generator 34 of the extinguisher 3, and to activate the gas generator 34 of the extinguisher 3 accordingly.
- the activation device 81 may comprise at least one resonant circuit, for example mounted on the extinguisher 3, for example an RFID antenna or a tuned antenna, which transforms the wave emitted by the activation device 81 into a spark in the generator of gas 34, thus igniting the gas generator 34.
- the means of wireless communication between the control unit and the activation device 81 can be further configured to determine if the control unit and the activation device 81 are within communication range.
- the control unit includes an additional transmitter and the activation device 81 includes an additional receiver.
- the additional transmitter and the additional receiver are adapted to establish a link between them, if necessary to communicate with each other, when they are located at a distance less than a predetermined distance from each other.
- a predetermined distance can be greater than or equal to a distance between the control unit, if necessary mounted on the pylon 500, and the activation device 81, if necessary mounted on the nacelle 1, when the system propulsion system 2 is mounted on the pylon 500 and in the nacelle 1.
- the additional transmitter and the additional receiver are adapted to establish a link between them when the control unit is mounted on the propulsion system, if necessary on the pylon 500, and that the activation device 81 is mounted on the nacelle 1, the propulsion system 2 being mounted on the pylon 500 and in the nacelle 1. Conversely, when the nacelle 1 and the propulsion system 2 are disassembled , the activation device 81 is moved away from the control unit by a distance greater than the predetermined distance. The link between the additional transmitter and the additional receiver can then no longer be established, and the wireless communication means between the control unit and the activation device 81 can then alert the user accordingly.
- the wireless communication means can be configured to check, when the propulsion system 2 and the nacelle 1 are raised at the end of the maintenance operation, that the activation device 81 and the control unit are within communication range.
- the wireless communication between the control unit and the activation device 81 is as reliable as communication by cable, which makes it possible to secure the extinguishing.
- the activation order transmitted by the activation device 81 to the extinguisher 3 can comprise a wave having a higher energy or equal to an activation energy of the extinguisher 3.
- the activation energy of the extinguisher 3 is then supplied by the aircraft, in particular by the electrical network of the aircraft.
- the activation order emitted by the activation device 81 is then a high-energy signal, that is to say that the signal corresponding to the activation order is sufficiently energetic to directly ignite the extinguisher 3 remotely, without a local energy source 85 being necessary, as illustrated by way of non-limiting example in FIG. 6.
- control order transmitted by the control unit can also comprise a wave having an energy greater than or equal to an activation energy of the extinguisher 3.
- the activation device 81 can redistribute the power of the control command to each or to a selection of extinguisher(s) 3 separately.
- the activation order transmitted by the activation device 81 to the extinguisher 3 can comprise a wave having a strictly lower energy to an activation energy of the extinguisher 3.
- the activation order transmitted by the activation device 81 is then a low energy signal.
- said wireless communication means is then of low power, therefore low in energy.
- the control order sent by the control unit can also include a wave having an energy strictly lower than an activation energy of the extinguisher 3.
- the activation device 81 if necessary integrated into the extinguisher 3, then comprises a local energy source 85 suitable for activating the extinguisher 3 in response to the reception of the order to activation, as illustrated by way of non-limiting example in Figure 5.
- the activation order is transmitted from the transmitter 83 of the activation device 81 to the local energy source 85.
- Said source of local energy 85 is adapted to generate, in response to receiving the activation order, a wave having an energy greater than or equal to the activation energy of the extinguisher 3.
- the local energy source 85 is adapted to transmit this wave, that is to say to supply the activation energy, to the extinguisher 3, in particular to the gas generator 34 of the extinguisher 3, that is to say to bring the power required to ignite the gas generator 34.
- the activation energy of the extinguisher 3 is therefore supplied by the local energy source 85.
- the local energy source 85 can be located near or in the extinguisher 3.
- the local energy source 85 can be an energy recovery device.
- the local energy source 85 can comprise at least one of the following sources: a battery, an accumulator, a capacitor, a vibration recovery system of the propulsion system 2 such as a generator by piezoelectric elements, a generator of thermoelectric energy (TEG).
- TOG thermoelectric energy
- the thermoelectric energy generator is adapted to generate electrical energy from the thermal gradients naturally present in the area where the local energy source 85 is mounted.
- the local energy source 85 is completely autonomous.
- the presence of the local energy source 85 makes it possible to dismantle and raise the nacelle 1 without having to reconnect the activation device 81 when it is mounted on the nacelle 1, or to use energy from the aircraft.
- the assembly may further comprise an energy storage device adapted to store energy collected by the local energy source 85.
- the energy storage device may be a battery, a supercapacitor, etc.
- the energy storage device is adapted to store an energy greater than or equal to the activation energy of the extinguisher 3.
- the release of energy by the energy storage device causes the activation of the extinguisher 3.
- the presence of the energy storage device, coupled with the local energy source 85, makes it possible to increase the availability of energy.
- the activation device 81 comprises the gas generator 34.
- the activation device 81 is carried by each extinguisher 3.
- the control command issued by the control unit is then transmitted from the control unit directly to the gas generator 34, and is adapted to activate the extinguisher 3 accordingly.
- the control order comprises a wave having an energy greater than or equal to an activation energy of the extinguisher 3
- the control order therefore the activation energy
- the energy of the control order causes the ignition of the gas generator 34, therefore the activation of the extinguisher 3.
- the wave of the control command may correspond to an electric current which has sufficient energy to ignite the gas generator 34, the control command being transmitted from the control unit directly to the generator of gas 34 by the electric cable which then connects the control unit and the gas generator 34 of the extinguisher 3.
- the activation device 81 can be an activation device 81 separate from the gas generator 34. control order is then transmitted from the control unit to the activation device 81.
- the activation device 81 is adapted to activate the extinguisher 3 in response to the reception of the control order, by the transmission to extinguisher 3 of the activation order.
- the activation device 81 can be mounted on the extinguisher 3. Alternatively, the activation device 81 can be mounted remotely from the extinguisher 3 and be adapted to activate the extinguisher 3 by means of wireless communication. between the activation device 81 and the extinguisher 3, the electric cable, or the optical fiber 82 connecting the activation device 81 and the extinguisher 3, as described above.
- One or more activating device(s) 81 can be present, for example only one activating device 81 can be present, so that the activating device 81 forms a centralized system, for example example mounted on the pylon 500 or on the nacelle 1, which distributes, in response to a control order issued by the control unit, one or more activation order(s) to one or more extinguisher(s) 3 mounted on the nacelle 1.
- activation devices 81 can be present, they can if necessary be disassembled separately from each other.
- the means of wireless communication between the control unit and the activation device 81 is a laser which produces a light signal on the pilot's order.
- the means of wireless communication between the activation device 81 and the extinguisher 3 is a bundle of optical fibers 82 which connects the activation device 81 to the extinguisher 3, more precisely to the gas generator 34 of the extinguisher 3, as shown by way of non-limiting example in FIG. 3.
- the optical fibers 82 receive the light signal from the laser, and use it to ignite the gas generator 34.
- the fiber laser interface is ensured by a lens which ensures minimum loss at the interface.
- the light signal emitted by the laser can have an energy strictly lower than the activation energy of the extinguisher 3, in which case a local energy source 85 is necessary to activate the extinguisher 3.
- the laser is then only sufficiently powerful to transmit the control order to the activation device 81 comprising the local energy source 85, and the local energy source 85 activates the extinguisher 3 by transmitting the activation order, on reception of the control order.
- the laser used as a means of communication has an energy which remains relatively low.
- the light signal emitted by the may have an energy greater than the activation energy of the extinguisher 3, the laser being a high-power laser, in which case the light signal from the laser transmitted by the optical fiber 82 suffices. to activate the extinguisher 3, in particular is sufficient to trigger the ignition of the gas generator 34.
- the wireless communication means between the control unit and the activation device 81 and/or the wireless communication means between the activation device 81 and the extinguisher 3 is a high-power, short-range microwave transmitter, the emitted microwave having an energy greater than the activation energy of the extinguisher 3.
- the nacelle 1 acts as a waveguide in a confined environment and avoids external leaks, the microwaves being transmitted in the fire zone 100, 200 power plant or under the fan cowl 1.
- the activation device 81 which includes the gas generator 34, in particular which may correspond to the gas generator 34, is thus capable simply by recovering the energy transmitted by the control unit, to activate the extinguisher 3, without any local energy source 85 being necessary.
- the set may comprise several extinguishers 3, the control unit being adapted to selectively activate one or more of the extinguishers 3 of the set.
- the control unit can be used to centrally trigger one or more extinguishings, simultaneously or successively.
- the control unit therefore makes it possible to control the extinguishers 3 autonomously and separately, for example according to the zone and/or the extent of the fire.
- the control unit therefore makes it possible to sequence the extinguishings, in order to be able to carry out several consecutive and independent extinguishings, i.e. to be able to use the extinguishing device in a desynchronized manner.
- the assembly may comprise at least a pair of two extinguishers 3 configured to expel the extinguishing agent at the same predetermined injection point, that is to say in the immediate vicinity of the point of predetermined injection.
- the control unit is suitable for activating each extinguisher 3 independently of the other on each extinguishing request.
- the extinguishers 3 can be activated sequentially so that two injections of extinguishing agent can be carried out consecutively and independently of each other at the request of the pilot for each pair of extinguishers 3.
- the 3 extinguishers can be configured to expel the extinguishing agent at several predetermined injection points spaced apart from each other.
- the extinction of a fire can be optimized according to the location of the fire and/or the magnitude of the fire.
- the assembly may comprise four pairs of extinguishers 3 in the same fire zone 100, 200 adapted to expel the extinguishing agent at the level of four predetermined injection points distributed in and/or around the fire zone 100, 200.
- the set can thus comprise four pairs of extinguishers 3 in the hot fire zone 200, and/or four pairs of extinguishers 3 in the cold fire zone 100.
- the set can comprise a total of sixteen extinguishers 3.
- One extinguisher 3 of each couple can be activated during an extinction in a given fire zone 100, 200 .
- the set allows for example to carry out two extinguishings in the cold fire zone 100 and two extinguishings in the hot fire zone 200.
- the activation device 81 can be adapted to selectively activate one or more of the extinguishers 3 of the set, in particular according to the control order received, for example by means of:
- the activation device 81 can distribute the single control order transmitted by the control unit to a selection of one or more extinguisher(s) 3 among the extinguishers present in the fire zone 100, 200 concerned. Such selective activation makes it possible to manage a plurality of extinguishers 3 mounted on the nacelle 1 independently.
- the control unit can be adapted to transmit a radio signal and/or a light signal and/or a structural wave.
- the activation device 81 is suitable for receiving the radio signal and/or the light signal and/or the structural wave emitted by the control unit, and for consequently activating a first selection of extinguisher(s) 3 in response to the radio signal received and/or a second selection of extinguisher(s) 3 in response to the light signal received and/or a third selection of extinguisher(s) 3 in response to the structural wave received.
- each activation device 81 being adapted to receive the radio signal or the light signal or the structural wave emitted by the control unit, and to activate a selection accordingly. extinguisher(s) 3 associated with the activation device 81.
- the activation device 81 can comprise several resonant devices each associated with a selection of extinguisher(s) 3. Each resonant device is adapted to be excited by the activation order at a particular frequency range and different from an excitation frequency range of the other resonant devices of the activation device 81.
- each activation device 81 can comprise at least one identifier, each identifier being associated with a selection of extinguisher(s) 3.
- the identifier can be a digital code, an RFID identifier, or other.
- the activation order contains the wave suitable for activating the selection of extinguisher(s) 3, and information concerning the identifier of the selection of extinguisher(s) 3 to activate, so that the activation device 81 selectively activates the selection of extinguisher(s) 3 corresponding to the identifier sent by the control unit.
- the control unit and/or the activation device 81 can be adapted to transmit the activation order and/or the control order to only some of the cables, in particular cables electric connecting the control unit to each of the extinguishers 3.
- the control unit and/or the activation device 81 can be adapted to transmit the activation order and/or the control order to only some of the cables, in particular cables electric connecting the control unit to each of the extinguishers 3.
- the interface of the control unit with the aircraft system can be unchanged, which allows total interchangeability or replacement of an old assembly by an assembly as described above with regard to the aircraft control system.
- An aircraft may comprise an assembly as described below, a propulsion system 2, a wing 600, and a pylon 500 fixed under the wing 600 of the aircraft.
- the propulsion system 2 is housed in the nacelle 1, the nacelle 1 is fixed to the pylon 500.
- the control unit can be mounted on the pylon 500.
- a method for activating an extinguisher 3 adapted to be implemented by means of an assembly as described above comprises the following steps:
- the step of detecting the disconnected state of said cable is carried out before the transmission step.
- the method described above has the same advantages as the assembly described above.
- control order and/or the activation order can be transmitted by:
- - a radio signal for example of the Wi-Fi, Wireless Avionics Intra-Communications (WAIC), and/or RFID type
- - a light signal for example of the laser type, Visible light communication (VLC), Li-Fi, and/or opto-electronic system; and or
- a wave for example of the microwave type, said wave being adapted to be transmitted to the structure of the nacelle 1 .
- the method may further comprise a step consisting in determining, by the means of wireless communication between the control unit and the activation device 81 , whether the control unit and the activation device 81 are within range. communication.
- the method may comprise a step of selective activation of one or more extinguisher(s) 3 of the assembly by the activation device 81 , for example by means of:
- the activation order transmitted by the activation device 81 to the extinguisher 3 can comprise a wave having an energy greater than or equal to an activation energy of the extinguisher 3.
- the activation order transmitted by the activation device 81 to the extinguisher 3 can comprise a wave having an energy strictly lower than an activation energy of the extinguisher 3, the activation of the extinguisher 3 then being performed by a local energy source of the activation device 81 in response to receipt of the activation order.
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2114237A FR3130750A1 (fr) | 2021-12-22 | 2021-12-22 | Déclenchement à distance d’une extinction en zone feu d’un système propulsif |
| PCT/FR2022/052460 WO2023118746A1 (fr) | 2021-12-22 | 2022-12-21 | Déclenchement à distance d'une extinction en zone feu d'un système propulsif |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4452750A1 true EP4452750A1 (fr) | 2024-10-30 |
Family
ID=80786260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22847604.0A Pending EP4452750A1 (fr) | 2021-12-22 | 2022-12-21 | Déclenchement à distance d'une extinction en zone feu d'un système propulsif |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250050148A1 (fr) |
| EP (1) | EP4452750A1 (fr) |
| CN (1) | CN118574772A (fr) |
| FR (1) | FR3130750A1 (fr) |
| WO (1) | WO2023118746A1 (fr) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3041936B1 (fr) | 2015-10-02 | 2018-08-17 | Airbus Operations | Systeme propulsif d'aeronef comportant au moins un reservoir anti-incendie |
| FR3060652B1 (fr) | 2016-12-21 | 2019-08-23 | Arianegroup Sas | Nacelle pour turboreacteur d’aeronef equipee d’un dispositif d’extinction de feu |
| US11439854B2 (en) * | 2017-08-17 | 2022-09-13 | The Boeing Company | Common array mounting bottles engineered for reuse |
| FR3077989B1 (fr) | 2018-02-20 | 2021-11-19 | Arianegroup Sas | Extincteur d'incendie |
| DE102018222162A1 (de) * | 2018-12-18 | 2020-06-18 | Rolls-Royce Deutschland Ltd & Co Kg | Belüftungs- und Löschvorrichtung für ein Gasturbinentriebwerk |
-
2021
- 2021-12-22 FR FR2114237A patent/FR3130750A1/fr active Pending
-
2022
- 2022-12-21 WO PCT/FR2022/052460 patent/WO2023118746A1/fr not_active Ceased
- 2022-12-21 EP EP22847604.0A patent/EP4452750A1/fr active Pending
- 2022-12-21 CN CN202280089863.3A patent/CN118574772A/zh active Pending
- 2022-12-21 US US18/723,071 patent/US20250050148A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3130750A1 (fr) | 2023-06-23 |
| WO2023118746A1 (fr) | 2023-06-29 |
| US20250050148A1 (en) | 2025-02-13 |
| CN118574772A (zh) | 2024-08-30 |
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