摘要 |
<P>PROBLEM TO BE SOLVED: To improve the performance of both an axial flow turbine part and an exhaust diffuser. <P>SOLUTION: In the exhaust diffuser 60 for the gas turbine which is connected to the downstream of a final stage moving blade 51 of an axial turbine part 50 using a combustion gas as a working fluid and has an annular space surrounded by an inner peripheral wall part 61 and an outer circumferential wall part 62, an inlet part of the inner peripheral wall part 61 directly connected to the final stage moving blade 51 is defined as a fixed wall part having an upheaval part 61a upheaved in the main flow side of the combustion gas flowing out from the axial turbine part 50. The upheaval part 61a is shaped so as to be erected toward the main flow side at a prescribed initial erecting angle θ in the most upstream side of the inlet part and to reach a prescribed upheaval height H while gradually decreasing the erecting angle along the stream of the main flow from the initial erecting angle θ. <P>COPYRIGHT: (C)2012,JPO&INPIT |