BOTTOM OF COMBUSTION CHAMBER WITH VENTILATION Russian patent published in 2011 - IPC F23R3/16 F23R3/60 

FIELD: engines and pumps.

SUBSTANCE: combustion chamber of gas-turbine engine includes bottom in which several air supply and fuel injection devices are installed, each of which includes bowl and deflector, which are installed along the main axis; deflector forms thermal protective screen located around the above bowl expanding in gas flow direction. Deflector includes annular part. Boundary surface between bowl and deflector is located on the above annular part. At least some part of boundary surface is oriented in the direction of front end of annular part in gas flow direction. Annular cavity is provided between deflector and annular part after the boundary surface. In annular part there are the first holes outgoing opposite the edge of chamber bottom, which is in contact with deflector for maintaining air circulation from inlet to outlet in annular part. The air leaving the first holes immediately blows some part of deflector, which is in contact with the end of chamber bottom.

EFFECT: invention allows cooling the combustion chamber bottom and maintaining bottom temperature below critical value during operation of combustion chamber.

17 cl, 7 dwg