Turbopropeller

A turbopropeller is a power unit. The engine (driving) involves a Hélice multipales (the engine) (8) via a transmission, the Réducteur (9). It is particularly adapted to the Avion S of which cruising speed lies between 300 and 600 km/h such as for example new the Airbus A400M. Beyond this speed, the aerodynamic fall of output of the propeller (transonic or supersonic flow pares blade of it) led to prefer the reaction engine or " réacteur".

This type of GMP (power unit) is also assembled on ships seeking a power ratio/high weight (yachts of luxury, warships, auxiliary engines at high speed for certain NGV).

Operation

  1. the pre propeller (A) compresses the air admitted in the air intake.
  2. the air is compressed by the compressors (C).
  3. It is then introduced into the combustion chamber, there it is mixed with the pulverized fuel.
  4. an ignition system starts the Combustion of the gas mixture.
  5. the kinetic energy of gases at the exit of the Combustion chamber (D) is used in three ways.
It is used for:
  • To actuate the Turbine S (E) which involve the compressing S (C) and the electric generators.
  • To actuate the turbine (E) which actuates the reducer (B), even actuating the propeller to him (the reducer transforms speed high with weak couple of low speed with strong couple).
  • To provide a push to the plane by the exhaust of gases in the conduit (F).

  • FOOT-NOTE (Etymology):
the French term turbopropeller is in fact derived from the English word turboprop composed of turbo and propeller (propeller) and which means driving with propeller literally driven by a turbine (there are thus traction and push known as residual). French name is thus unsuitable if one wants to be completely rigorous since all Turbomachine ensuring a propulsion should be called thus. As for saying " a turbopulseur" to indicate a plane been driven by such engines, it is a Métonymie which does not pose any problem with a linguist or a quidam, but becomes for engineer purist a dangerous heresy in a pure state.

See also: Propulsion of the aircraft

See too

Article on the Turbojet S

External bonds

Articles on the propulsions with reaction in “Avion.legendaire.Free.fr”

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