BURNER Russian patent published in 2012 - IPC F23R3/34 

FIELD: heating.

SUBSTANCE: burner for gas-turbine engine includes burner housing, in which the above burner is enclosed, and which has upstream and downstream end parts, which are opposite in axial direction. Auxiliary combustion chamber is located on upstream end of burner. Auxiliary combustion chamber is equipped with fuel and air for fuel combustion to form the flow of unblocked concentration of radicals on unbalanced level and heat from auxiliary combustion zone, which is directed downstream along axial line of auxiliary combustion chamber through the throat at outlet of auxiliary combustion chamber. Multiple sections of refractory burner arch envelope the outlet of auxiliary combustion chamber and protrude from it in the downstream direction. External section of refractory arch, which has larger diameter than that of internal section of refractory arch, protrudes to larger downstream distance than internal refractory arch. The main combustion space is restricted after auxiliary combustion chamber in the flow direction with end parts of refractory arch. The main combustion space is formed with possibility of retaining in it of the main flame and recirculation zone for direction of flow of free radicals back to the front deceleration point at the outlet of auxiliary combustion chamber. At least the first channel made in the form of ring-shaped space between upstream section of refractory arch and the closest downstream section of refractory arch provides air and fuel supply to the main flame in the combustion space.

EFFECT: stabilisation of combustion process of partially pre-formed poor mixtures is provided.

15 cl, 9 dwg