Fuel injecting system for e.g. annular direct flow combustion chamber of turboprop engine of aircraft, has air passage channels formed with holes, where air flow delivered through holes is utilized to clean up head of fuel injector

摘要

The system has a support unit (140) for supporting a head of a fuel injector, and two annular coaxial rows of air passage channels arranged downstream of the support unit. The channels are formed with holes (170, 172), where air flow delivered through holes is turned to interior of a venturi to clean up the head of the fuel injector to avoid return of flame toward the injector. The holes are inclined axially at an angle ranging between 50 and 80 degree.