Patent ID: 6938404

Claim:
A supercharged gas turbine engine comprising: an open-cycle core gas turbine engine for generating shaft power output, said core gas turbine engine includes a multi-stage compressor, a first stage of the multi-stage compressor being a rotary ram compressor; a supercharger for supercharging intake air of the core engine, wherein said supercharger includes a rotary ram-in compressor and a turbine, and wherein said turbine has variable-area nozzle assembly and is driven by gases discharged from the core engine; operator controlled means for elective partial bleeding of the gases discharged from the core engine and supplied to the supercharger's turbine; at least one pressure sensor for detecting the degree of rise in the pressure of air supplied by the supercharger's compressor; means for adjusting the area of the nozzles of the supercharger's turbine according to the detected degree of rise in the air pressure; and means for adjusting the rate of fuel supply to the core engine according to the pressure level of air supplied by the supercharger's compressor.