The engine of the Eurofighter Typhoon is composed of 15 modules constructed by the Eurojet Consortium made up of Avio (Italy), Rolls-Royce (UK), MTU Aero Engines (Germany) and ITP (Spain).
Avio looks after the entire low-pressure turbine system, sub-divided into stator and rotor modules (inclusive of the low-pressure shaft), the accessory drive train, the afterburner system, and the Air/Oil systems of the major parts of the accessories that equip the turbojet.
Avio also deals with the management and assembly of the complete engine, as well as the MRO of the engine and the 15 modules for the Italian Armed Forces.
Avio has a 21% share in the engine.
Low-Pressure Turbine
Avio is responsible for the whole system, sub-divided into stator and rotor modules (including the low-pressure shaft). The production of the single-stage turbine required the most recent technologies for both its mechanical and aerodynamic design, and the use of materials (“single-crystal” rotor blades). Besides carrying out the straightening of the high-pressure flow through a stage of airfoils, the stator vane is the rear engine support, which has two rear bearings of the high- and low-pressure shafts. |
Assembly and Engine Testing
EJ200 is a twin-shaft axial flow turbofan with a three-stage low-pressure compressor, a five-stage high-pressure compressor, led respectively by a single-stage low-pressure turbine and a single-stage high-pressure turbine. The combustion chamber is of an annular type with 20 spray burners. |
Accessory Drive Train
The main body, made from a single casting in magnesium, is connected to the accessories by light alloy adaptors. The gearbox drives the engine accessories (combined oil pump, main fuel pump, tank with rotating basket, afterburner pump, air/oil separator and hydraulic pump) through six shafts, while the seventh supplies mechanical power to the Aircraft Mounted Accessories Drive (AMAD). |
Combustion Chamber and Afterburner
Avio is responsible for the entire afterburner system downstream from the fuel control valve and light alloy lines, fuel spray control, injectors, flame stabiliser, noise suppresser and heat shields. The geometry of the afterburner was conceived so that it reduces combustion instability, while resisting the extreme operating temperatures, and cools the flaps of the engine exhaust nozzle.
The main function of the afterburner is to mix the cold bypass and main turbine streams. The control system ensures balanced throttle setting and thrust from the afterburner. |
Other Components
Avio is responsible for most of the accessories that equip the turbojet, including the variable nozzle servo-control system (HPGU and actuators), components of the oil system and ignition system (HEIU and spark plugs). Moreover, Avio is continuously involved with partner suppliers in developing new monitoring systems of the engine functionality and performance. |
