Snecma

Safran Aircraft Engines

Bruno Robert Gaully

Baptiste Benoit Colotte

Cedrik Djelassi

Maurice Georges Vernochet

Christophe Javelot

Amaury Olivier

Jerome Guy Roger Sebaa

Cecile Marot

Michel Andre Bouru

Damien Bonneau

Jean Pierre Galivel

Jean-Michel Roux

Thomas Lepage

Yves Emprin

Vincent Cabret

Brice Andre

Darragh McGrath

Julien Ricordeau

Alexandra Riou

Thierry Poix

Jean Pierre Elie Galivel

Ismail Sylla

Virginie Ayrault

Cecile Valerie Marie Cointe

Michael Dinsart

Jean-Albert Paul Marc Robert

Baptiste Benoít Colotte

Germain Michel Emmanuel Bertho

Oil system for a turbomachine, making it possible to continue the supply of oil to the pieces of equipment of the turbomachine in case of occurrence of a fire within the turbomachine, including an oil circuit, at least one oil-consuming piece of equipment, supplied by the oil circuit, a pumping unit, including at least one speed-pilotable electrically driven pump, supplying the oil circuit, and an electronic control unit, configured to pilot the electrically driven pump, wherein the electronic control unit includes two separate logics of piloting the electrically driven pump, and wherein the electronic control unit is configured to pilot the electrically driven pump according to the first logic by default and to switch to the second logic in case of receipt of a signal representative of the presence of a fire or of an overheating.

Oil system for a turbine engine

A method of adjusting a fuel flow rate in a turbine engine propelling an aircraft, including: obtaining a first estimate of a flow rate of fuel injected into a combustion chamber of the turbine engine propelling an aircraft and as delivered by a fuel metering device of the turbine engine; obtaining a second estimate of the fuel flow rate, which second estimate is more accurate than the first estimate for at least one range of fuel flow rate values and being delivered by an estimator device having a flow meter; and adjusting the fuel flow rate threshold value with help of a difference evaluated between the first estimate and the second estimate, the threshold value being for use in an open loop for regulating the turbine engine.

Method and device for adjusting a threshold value of a fuel flow rate

A method and a device for determining, in real time, the flow rate of air collected from an aircraft engine by a system for collecting air from the engine, including an acquisition device for acquiring at successive times measurements of physical quantities in respect of temperature, pressure and pressure loss, specific for the air collection system, a computing device for evaluating at each current time of the successive times a first current estimation of the flow rate of air collected from the aircraft engine on the basis of the physical quantity measurements, the acquisition device for acquiring at the current time a minimum current air flow rate data item defined on the basis of a predetermined flow rate tables, the computing device for hybridising, at the current time, the first current air flow rate estimation and the minimum current air flow rate data item to form a second current air flow rate estimation.

Method and system for determining the flow rate of air collected from an aircraft engine

The invention relates to a method for monitoring the operation of a fuel circuit shut-off valve comprising an LPSOV, a flow regulator, the shut-off valve,

Method for monitoring a fuel circuit shut-off valve

A device for ventilating and electrically powering a computer of an engine of an aircraft, the device including a feed mechanism feeding air to a proximity of the computer and a fan connected to a drive mechanism and configured to generate a stream of air for ventilating the computer. The fan is mounted in the air feed mechanism, and the drive mechanism includes an electrical machine configured to operate as a motor for driving the fan, and as a generator for powering the computer, a rotor of the machine when operating as a generator being driven by the fan, which is itself driven by a stream of air flowing in or leaving the air feed mechanism.

Device for ventilating and supplying electrical power to an aircraft engine computer

An aircraft turbine engine including at least one spool rotating at speed Nand a monitoring system including: a regulating module including at least one regulation measurement channel to obtain a measurement of the speed Nand a mechanism to compare the obtained speed measurement with a thrust setpoint to provide a thrust status; and a module for engaging a protection function of UHT or ATTCS type of the turbine engine. The turbine engine further includes a system for protection against overspeed to prevent ejection of high-energy debris outside the turbine engine, the protection system including at least one overspeed measurement channel to obtain an overspeed of the rotating spool of the turbine engine. The engagement module compares at least one overspeed obtained with at least one reference speed defined according to the protection function to be engaged, to engage the protection function according to results of the comparison.

Turbomachine comprising a monitoring system comprising a module for engaging a protection function of the turbomachine and monitoring method

A device for controlling positioning of variable-geometry equipment of a turbomachine, including a computer, an actuator of variable geometry driven by the computer, and a drive train, the actuator including moving parts including a sensor for measuring its elongation, the drive train being connected at one of its ends to a point of attachment of the moving parts and at another end to a point of attachment of the equipment, the point of attachment moving under action of the actuator along a travel limited by an end stop and the drive train being elastically deformable under the action of the actuator when the point of attachment is against the end stop. An elongation instruction supplied by the computer to the moving parts is defined as a difference with respect to the value of the elongation of the moving parts that corresponds to contact between the point of attachment and the end stop.

Device and method for positioning variable-geometry equipment for a turbomachine, using a relative-measurement jack

A method controlling a clearance between tips of blades of a turbine rotor of a gas turbine aircraft engine and a ring-shaped turbine shroud of a housing surrounding the blades, the method including: controlling flow and/or temperature of air directed toward the housing according to an estimate of the clearance, the estimate of the clearance is determined upon start-up of the aircraft engine, according to a temperature measured by a temperature sensor including a sensitive element positioned in a free space of the aircraft engine.

Method for controlling the clearance at the tips of blades of a turbine rotor

A method of controlling a turbine engine, including: measuring a first temperature by a first temperature sensor; measuring a second temperature by a second temperature sensor; estimating a third temperature modeling the first temperature; and determining at least one control setpoint for at least one piece of variable-geometry equipment of the engine, as a function of the measured first temperature. The first sensor presents a time constant longer than a time constant of the second sensor. The method further detects ingestion of water or hail as a function of a drop in the measured second temperature; and when water or hail ingestion is detected, determines the control setpoint as a function of the estimated third temperature.

Method of controlling a turbomachine

The device comprises first means for determining a pressure value relative to the pressure at the outlet of a precooler of an air bleed system and second means for calculating the air bleed level using this pressure value, said first means comprising means for calculating a first pressure value at the outlet of the precooler, using the pressure measured by a sensor, means for receiving a pressure measured by a second sensor, which represents a second pressure value at the outlet of the precooler and means for selecting one of said first and second pressure values, which is then transmitted to said second means for calculating said air bleed level.

Method and device for determining the air bleed on an aircraft turbojet engine

A method and device producing a setpoint signal representing a flow rate of fuel that a metering unit having a slide valve is to supply to a fuel injection system of a combustion chamber in a turbine engine, the position of the valve depending on the setpoint signal. The method: obtains a first signal representing a measurement as delivered by a flow meter of a flow rate of fuel injected into the chamber; evaluates a second signal representing the flow rate of fuel injected into the chamber based on a measurement of the position of the valve; estimates a third signal representative of the measurement delivered by the flow meter by applying a digital model of the flow meter to the second signal; and produces the setpoint signal by adding a compensation signal to the first signal, the compensation signal obtained by subtracting the third signal from the second signal.

Method and a device for producing a setpoint signal

A control of a fuel metering device for a turbine engine as a function of a weight flow rate setpoint includes responding to at least one validity criterion to select a weight flow rate from among: a weight flow rate calculated as a function of a position signal; a weight flow rate calculated as a function of the position signal and of at least one temperature measurement signal; a weight flow rate calculated as a function of the position signal and of at least one permittivity measurement signal; a weight flow rate calculated as a function of the position signal, of at least one temperature measurement signal, and of at least one permittivity measurement signal; and a weight flow rate calculated as a function of a temperature measurement signal, of a permittivity measurement signal, and of a volume flow rate measurement signal.

Control of a fuel metering device for turbomachine

A device for measuring a compressor inlet temperature in a primary stream flow passage of a bypass turbojet. The device includes an airtight hollow structure forming a connection arm of an intermediate casing of the turbojet and configured to pass radially through a flow passage for the primary stream and a flow passage for a secondary stream of the turbojet, the connection arm including at least one inlet air orifice opening out into the primary stream flow passage at an inlet of a compressor and at least one air outlet orifice leading to a zone of the turbojet in which surrounding pressure is less than pressure in the primary stream flow passage at the inlet of the compressor; and a temperature probe having its sensitive element arranged inside the connection arm.

Device for measuring temperature in a primary stream flow passage of a bypass turbojet

A method to correct a current measurement of pressure of a gas stream delivered during a mission by a sensor in the engine. The method includes: estimating a drift error affecting the sensor on the basis of a difference existing between: (1) a calibration measurement of the pressure of the gas stream as delivered by the sensor in the engine, and (2) an atmospheric pressure measurement delivered by a sensor of the aircraft presenting accuracy greater than that of the sensor in the engine; these measurements being performed while the sensor in the engine and the sensor of the aircraft are subjected to same surrounding atmospheric pressure; and subtracting the estimated drift error from the current measurement.

Method and a device for correcting a measurement of the pressure of a gas stream flowing in an aircraft engine

A manual mechanical drive to a high pressure sub assembly of a turbojet during endoscopic inspection of the high pressure turbine is provided. A coupling element suitable for coupling with an external actuator such as a crank handle is fitted on the axis of an alternator that is normally driven mechanically via the high pressure sub assembly, thereby providing a coupling suitable for driving said high pressure sub assembly.

Growing community of inventors

Marolles en Hurepoix, France

Bruno Robert Gaully