Gas turbine power plant

Claim 1

COMBINED TURBO-JET AND RAM-JET POWER PLANT HAVING A FLOW DUCT WHICH IS PROVIDED IN FLOW SERIES WITH AN AIR INTAKE PASSAGE, COMPRESSOR MEANS, PRIMARY COMBUSTION EQUIPMENT, TURBINE MEANS, AND REHEAT COMBUSTION EQUIPMENT; A BY-PASS DUCT WHOSE UPSTREAM END COMMUNICATES WITH THE COMPRESSOR MEANS SO AS TO RECEIVE PART OF THE AIR WHICH HAS BEEN COMPRESSED THEREIN, THE BY-PASS DUCT BY-PASSING THE PRIMARY COMBUSTION EQUIPMENT AND THE TURBINE MEANS, AND THE DOWNSTREAM END OF SAID BY-PASS DUCT HAVING AT LEAST ONE OPENING WHICH COMMUNICATES WITH SAID FLOW DUCT UPSTREAM OF THE REHEAT COMBUSTION EQUIPMENT; MEANS FOR VARYING THE EFFECTIVE AREA OF SAID OPENING; A SUPPLEMENTARY AIR DUCT WHICH IS ARRANGED TO RECEIVE RAM AIR FROM THE AIR INTAKE PASSAGE; AND A VALVE DEVICE THROUGH WHICH THE SUPPLEMENTARY AIR DUCT SELECTIVELY COMMUNICATES WITH THE BY-PASS DUCT, SO AS TO SUPPLY THE RAM AIR THERETO, SAID VALVE DEVICE HAVING A FIRST OPERATIVE POSITION FOR RAM-JET OPERATION IN WHICH RAM AIR PASSES FROM THE SUPPLEMENTARY AIR DUCT TO THE BYPASS DUCT AND THEREFROM TO THE REHEAT COMBUSTION EQUIPMENT AND A SECOND OPERATIVE POSITION FOR TURBO-JET OPERATION IN WHICH THE FLOW OF RAM AIR FROM THE SUPPLEMENTARY AIR DUCT INTO THE BY-PASS DUCT IS BLOCKED.