Patent ID: 8622687

Claim:
A method of operating a compressor comprising the steps of: operating a front block compressor of an adaptive core engine to increase pressure of a fluid to a first pressure ratio in a high-power mode operation; operating a rear block compressor of the adaptive core engine coupled to the front block compressor such that the front block compressor and the rear block compressor operate at the same physical speed; driving the front and rear block compressors with a high pressure turbine; closing a rear block stator vane such that flow of the fluid into the rear block compressor is substantially cut off except for a purge flow during a high-power mode operation; keeping a blocker door opened such that substantially all of the fluid pressurized by the front block compressor flows through a bypass passage during the high-power mode operation; and flowing all of the fluid from the front and the rear block compressors into a combustor of the adaptive core engine upstream of a high pressure turbine of the adaptive core engine.