Method for performing combustion

A method for operating a combustion chamber of an axial flow rotary machine, the combustion chamber extending axially and having a pilot zone extending in an axially oriented direction having at least one means for injecting zone extending in an axially oriented direction having at least one means for injecting swirling columns of gases including means of injecting swirling columns of fuel and oxidizer fluid into the axially extending pilot zone and burning the columns of fuel and oxidizer fluid, and, having a divergent outer wall in a main zone immediately adjacent to the pilot zone, the divergent outer wall in the main zone having a plurality of injectors having means for injecting swirling streams of gases in the low power and high power operative conditions, which comprises:

• burning the fuel and oxidizer fluid in the combustion chamber while flowing the gases in the axial direction including the step of forming a plurality of circumferentially spaced swirling columns of gases which extend to the downstream end of the pilot zone and into the main zone;
• impacting these turbulent streams of swirling gases with a plurality of circumferentially swirling streams of gases in the main zone extending from the divergent outerwall that are angled inwardly toward the turbulent streams at low power and high power operative conditions, the swirling gases in the main zone containing only air at low power operative conditions and air and fuel at high power operative conditions.