Snecma

Safran Aircraft Engines

Jean-Michel Roux

Anthony Bernard Germain Lafitte

Cedrik Djelassi

Bruno Robert Gaully

Frédéric Jean-Bernard Pouzadoux

Julien Alexis Louis Ricordeau

Alexandre Anfriani

Jean-Frederic Pierre Joseph Bruhat

Frederic Jean-Bernard Pouzadoux

Darragh McGrath

Beatrice Nathalie Bois

Francois Julienne

Nicolas Courtiade

Frederic Pouzadoux

Florent Till

Frédéric Pouzadoux

Béatrice Nathalie Bois

Jean-Frédéric Pierre Joseph Bruhat

Darragh Mcgrath

A method for simulating the distribution of blades on a turbomachine disc includes: providing blade configurations, each being associated with a blade and including at least one measurement of a balancing parameter measured on the associated blade; and searching for and selecting a bladed-disc distribution combining the configurations of blades supplied with positions on the disc, the bladed disc distribution encouraging the attainment of at least one criterion defined according to a predetermined cost function dependent on the balancing parameter measurements, and the searching and selecting being performed by successive iterations.

Method for simulating the distribution of blades on a turbomachine disc

The invention relates to a method () for manufacturing a turbomachine fan comprising a plurality of blades mounted on a disc extending along a longitudinal axis, said method comprising the following steps of: &#x2014;measuring () at least one structural parameter of each of the blades in the cold state, and, for each of the blades, estimating () at least one structural parameter in operation relating to a blade from the structural parameter(s) measured on said blade in the cold state, &#x2014;determining () an optimal sequence of the blades around the disc from the structural parameters estimated in operation for each of the blades, and &#x2014;mounting () the blades on the disc in the optimal sequence thus determined.

Method for manufacturing a turbomachine fan having a reduced noise level at multiple rotational frequencies of said turbomachine

A method for reducing the noise level generated by a fan of a turbomachine including a plurality of vanes, said method further including, when the turbomachine is operating and under given flight conditions, the following steps measuring an operational pitch angle for each of the vanes, calculating an offset between the operational pitch angle of each of the vanes and a predetermined reference pitch angle for the given flight conditions so as to produce a controlled noise level at multiple rotation frequencies of the fan, correcting the orientation of the vanes so as to compensate their operational pitch angles depending on the offsets thus calculated.

Method for reducing the noise level of a turbomachine fan

A turbojet fan blade in which a leading edge presents a sweep angle greater than or equal to +28&#xb0; in a portion of the blade that is situated at a radial height lying in a range of 60% to 90% of a total radial height of the blade measured from its root towards its tip, and the leading-edge sweep angle presents a difference of less than 10&#xb0; between a minimum sweep angle measured at a radial height of minimum sweep angle situated in the portion of the blade lying in a range of 20% to 90% of the radial height of the blade, and a sweep angle measured at a radial height that is 10% greater than the radial height of minimum sweep angle.

Turbojet fan blade

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

Growing community of inventors

Moissy-Cramayel, France

Jean-Michel Roux