INJECTION SYSTEM FOR A COMBUSTION CHAMBER OF A TURBINE ENGINE, COMPRISING AN ANNULAR WALL HAVING A CONVERGENT INNER CROSS-SECTION Russian patent published in 2018 - IPC F02C7/22 F23R3/28 

FIELD: machine building.

SUBSTANCE: invention mainly relates to a system for injecting air and fuel mixture for the annular combustion chamber bottom of a turbine engine, comprising at least two devices for injecting fuel, among which are central injector (26) and peripheral annular injector (43) arranged around said central injector (26), and inner annular air intake channel (71), into which central injector (26) leads, such as to allow mixing the fuel from central injector (26) and the air taken into inner annular channel (71), and at least one outer annular air intake channel (30), enabling said mixture to be enriched with air and the pilot combustion area to be stabilized. Inner annular channel (71) and at least one said outer annular channel (30) are separated by intermediate annular wall (70) extending around central injector (26) and having inner convergent cross-section (70a). Inner annular channel (71) is devoid of a gimlet enabling a gyration movement to be generated. Annular combustion chamber and a turbine engine are also presented.

EFFECT: invention provides the improved fuel combustion control by obtaining a more homogeneous combustion of the pilot combustion zone core, and also improves the fuel spraying and evaporation control.

9 cl, 6 dwg