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    Gas turbine and method of operating it
    4.
    发明专利
    Gas turbine and method of operating it 未知

    公开(公告)号：GB2289939A

    公开(公告)日：1995-12-06

    申请号：GB9509194

    申请日：1995-05-05

    Applicant: ABB RESEARCH LTD

    Inventor： CHYOU YAU-PIN ,  SATTELMAYER THOMAS ,  PETERSENIOR

    IPC: F23R3/54

    Abstract: In order to provide a gas turbine which is suitable for higher pressure and temperature ratios and has improved thermal efficiency, a short overall length and minimised NOx-emissions, a diffuser (6) leading into an exhaust-gas bend (5) is attached to the high-pressure turbine (2) of a gas turbine (1) formed with two combustion stages. At least one fuel lance (8) fastened in the pressure casing (7) of the gas turbine (1) reaches into the other end of the exhaust-gas bend (5). The exhaust-gas bend (5) leads into the second combustion chamber (4) designed as a reversal combustion chamber. Following the latter is a nozzle (9) connected to the low-pressure turbine (3). In such a gas turbine (1), the velocity of the exhaust gases (14) is retarded after they are discharged from the high-pressure turbine (2) and their flow direction is changed by 180 DEG and fuel (15) is injected in the same flow direction. The resulting combustion mixture (16) is directed into the second combustion chamber (4) and the flow direction is changed again by 180 DEG . The combustion mixture (16) is swirled there, ignited and burnt, and the exhaust gas (18) is expanded in the low-pressure turbine (3).

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