Patent ID: 9605594
Date: 2017-03-28
CPC Classifications: F02C,F23D,F23R

Claim:
1. A fuel injection device for an annular combustion chamber of a turbine engine, the device comprising: a pilot circuit continuously feeding an injector opening out into a first Venturi; a multipoint circuit intermittently feeding injection orifices formed in a front face of an upstream annular chamber of a second Venturi that is coaxial about the first Venturi; and an annular ring mounted in the annular chamber and including fuel-passing orifices opening out into the injection orifices, wherein each of the fuel-passing orifices formed in the annular ring includes a zone of small cross-section extended at least downstream or upstream by a portion of increasing cross-section, and wherein the pilot circuit includes a circuit for cooling the annular ring, and further comprising a gap interposed between a front face of the annular ring and a front face of the annular chamber for thermally protecting the front face of the annular ring.