Combustion device having a distribution plenum

摘要

The combustion device includes a burner, a combustion chamber downstream of the burner, a lance projecting into the burner for fuel and air injection, and a plenum that at least partly houses the burner. The plenum is connected to the inside of the lance to supply an oxidiser to it.

主权项

1. A combustion device comprising:
a burner, a combustion chamber downstream of the burner, a lance projecting into the burner for fuel and air injection, and a main distribution plenum, an inner plenum, and an outer plenum that houses the inner plenum and the burner, the inner plenum connected to the burner to supply air to the burner, the outer plenum connected to the lance to supply air to the lance, the main distribution plenum configured to supply air received from a compressor bleed to the outer plenum at a first flow rate, the inner plenum at a second flow rate that is greater than the first flow rate, a first row of turbine vanes downstream of the combustion chamber and an outlet plenum configured to supply air received from the main distribution plenum to outlet guide vanes upstream of the burner; wherein the main distribution plenum, inner plenum and outer plenum are configured such that a pressure at which air is fed to the lance is higher than a pressure within the inner plenum.