Movement territory for secondary heat exchanger room of gas turbine

摘要

As for this invention, the first guide vane line the secondary heat exchanger room (1) and the low pressure turbine being the gas turbine which it has (2), the aforementioned first guide vane line, on the description above the secondary heat exchanger room is arranged immediately on downstream side, the secondary heat exchanger room (1) the boundary section outside, is formed with radial by one external wall segment (4) at least, we to be fixed with one where this external wall segment with outside is arranged in radial support element (5) at least, the hot gas (3) the passage indirect, at least one guide vane support section (8) at least fixingOutside being done, the platform (6) being soon, inside the territory in the guide vane line, we have adjoined to radial with outside, and the external wall segment (4) and the outer part platform (6) inside the entrance territory between, width of the range 1 - 25mm it possesses (B) in axial direction, the cavity which was formed almost by the gap which has extended to radial (9) it regards the gas turbine which is provided. As for the gas turbine by this invention, especially, one step element (22,22 ' and 22 ) is arranged at least inside the entrance territory, features that just 10% the aforementioned width has decreased at least one which has almost extended vertically with this step element, the cavity (9) vis-a-vis the direction of the hot gases style inside step section (28) in at least.