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А.Ф. Третьяков
12
Features of manufacturing technology for turbine blades
with effusion cooling
© A.F. Tretyakov
Bauman Moscow State Technical University, Moscow, 105005, Russia
The article describes
a turbine blade front edge sweat cooling system. The system pro-
vides cooling gas output onto the surface and enhances thermal protection. To implement
the method of turbine blade cooling it is necessary to develop processes of manufacturing
the porous material sheets with the desired properties, stamping and consolidating the
membrane with turbine blade housing. The article presents the results of engineering
developments and experimental research of the possibility of using the porous meshed
material for the turbine blade cooling system in high temperature combined-cycle plants
with superheated steam. Technological processes of manufacturing porous meshed mate-
rial sheets by vacuum hot-rolling the steel 12X18H10T with variable permeability, bend-
ing when membrane shaping on the profile of the turbine blade leading edge, and brazing
the membrane to the blade body are developed. The results of mechanical and thermal
tests have shown that the developed technology of manufacturing turbine blades with
effusion cooling ensures cooling method efficiency and eliminate the possibility of pene-
trating hot gas through the porous membrane into the inner cavity of the blade.
Keywords:
steam and gas turbine, blade, effusion cooling, steam, porous meshed materi-
al, rolling, bending, brazing.
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