Combustion chamber flaps

Most modern combustion chambers are of annular, or tubular-ring construction. The burner devices are arranged in a circular array with respect to the longitudinal axis of the combustion chamber body. In order to close the front end of the combustion chamber, flaps are provided. The outlet end of each burner is fixed in the flap body.

The spacer between the inner wall of the damper and the outer mounting flange creates an annular channel for air to pass into the premixing path. The air passes through the annulus and then reverses direction and enters the combustion chamber, mixing with the fuel again.

Diffusers are mounted on the outlet edge of the flaps, which are designed to increase the cross-sectional area along the axial length. The diffuser also causes a reduction of air velocity in the annular channel. This solution also reduces air pressure losses and maintains the efficiency of the combustion chamber as a whole.