Combustor system

An apparatus comprising:

• a gas turbine engine combustion area;
• a plenum in fluid communication with the combustion area, the plenum having an exit aperture configured to convey bypass air to the combustion chamber;
• and
• a cover moveable from an open position to a closed position and capable of being moved to a selectable position between and including the open position and the closed position, wherein the amount of bypass air that is conveyed to the combustion area is dependent upon the selectable position of the cover.

A method comprising:

• capturing an inlet flow stream of a gas turbine engine;
• bypassing a portion of the inlet flow stream;
• combusting a fuel/air mixture within a first combustor positioned intermediate a compressor and a turbine of the gas turbine engine;
• metering a portion of the bypassed inlet flow stream into a second combustor downstream of a turbine by moving a meter valve;
• and
• auto igniting a mixture of the bypassed portion of the inlet flow stream, a fuel, and a product of combustion from the first combustor.