Gec Alsthom Transport Sa

Centre National De La Recherche Scientifique

UniversitÉ De Poitiers

Snecma

Socpra Sciences Et Genie S.e.c.

Ensma

Safran Aircraft Engines

Yves Gervais

Gilles Mariaux

Alexandre Alfred Gaston Vuillemin

Peter Jordan

Patrice Masson

Maxime Koenig

Alain Berry

Pierre Comte

Anthony Gerard

Michel Besombes

Jean-Laurent Peube

Herve Girard

Pierre Andre

Alain Guinot

Gerard Mineaud

The invention relates to a rear casing for a turbine engine comprising a primary body generating a primary flow () to be ejected through a primary nozzle (), said rear casing () being shaped so as to be positioned downstream from the primary body and to define, on the inside of the turbine engine, the path followed by the primary flow downstream from the primary nozzle (). The tail cone is characterised in that it comprises a connection to a system for supplying a pressurised gas and at least one perforation () for injecting the pressurised gas through the perforation and into the primary flow. The casing preferably comprises at least one means for rotating same about the axis of rotation of the mobile elements of the primary body.

Tail cone for a microjet rotary turbine engine

A method and apparatus for reducing a selected tonal noise generated by a fan operating in a non-uniform flow by locating at least one obstruction in the non-uniform flow such that the at least one obstruction generates a noise that is out of phase with the selected tonal noise. The noise generated by the at least one obstruction interferes with the selected tonal noise, thus reducing the selected tonal noise. It is also contemplated to use additional obstructions to reduce other tonal noises generated by the fan.

Method and apparatus for controlling tonal noise from subsonic fans

A regulating apparatus and a regulating method for regulating the internal pressure P.sub.i of a ventilated, closed volume subjected to variations in external pressure P.sub.e, the apparatus including at least two compensation circuits enabling the intake air flow rate q.sub.1 and the extraction air flow rate q.sub.2 to be adjusted in real time so that the difference between these two flow rates algebraically compensates for the leakage flow rate q.sub.f, and maintains the internal pressure P.sub.i inside the volume at a constant level.

Method and apparatus for regulating the internal pressure of a

Apparatus and method for preventing sudden changes of pressure in

The invention relates to a device for eliminating sudden changes of pressure in a ventilated or air-conditioned vehicle, the device comprising: a detector for detecting changes in the pressure outside the vehicle and delivering signals representative of said changes; closure means for closing an outside air suction duct and an inside air rejection duct; a control unit receiving the signals from the detector and controlling closure of the ducts above a first determined rate of change in outside pressure, said unit also controlling re-opening of the ducts after said change in outside pressure has fallen below a second determined rate; and means for balancing the inside pressure and the outside pressure by a controlled flow of air between the outside and the inside of the vehicle, said means constraining the pressure inside the vehicle to change as a function of time at less than a set rate.

Method and apparatus for eliminating sudden changes of pressure inside

Growing community of inventors

Poitiers, France

Yves Gervais