AIR-FUEL MIX INJECTION SYSTEM IN AN AIRCRAFT TURBOMACHINE COMBUSTION CHAMBER, COMPRISING A PERFORATED AIR INJECTION HOLES VENTURI

摘要

In order to improve the atomization process of the fuel, the invention relates to an injection system (18) of a mixture of air - fuel into a combustion chamber of a turbomachine of the aircraft, the injection system comprising, successively, from upstream to downstream, a sliding crossmember (26) intended to receive the head (82) of a fuel injector (80), a venturi (27), then a mixer bowl (28), the injection system also comprises an air swirler (24) provided with a first series of blades (30) for introducing air into an annular channel (64) is delimited internally by the venturi (27) and opening toward the downstream end into the mixer bowl (28). According to the invention, the venturi (27) is multiperforated.