Pregled bibliografske jedinice broj: 55873
Improved Cooling fo Gas Turbine Blades
Improved Cooling fo Gas Turbine Blades // Thermal Sciences 2000 / Bergles, Arthur E. ; Golobič, Iztok (ur.).
Ljubljana: ASME Inetnational - ZSITS, 2000. str. 459-466 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
CROSBI ID: 55873 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Improved Cooling fo Gas Turbine Blades
Autori
Ruševljan, Miroslav ; Guzović, Zvonimir ; Josipović, Jasenko
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Thermal Sciences 2000
/ Bergles, Arthur E. ; Golobič, Iztok - Ljubljana : ASME Inetnational - ZSITS, 2000, 459-466
Skup
The ASME-ZSITS International Thermal Science Seminar 2000
Mjesto i datum
Bled, Slovenija, 11.06.2000. - 14.06.2000
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
gas turbine blades; improved cooling
Sažetak
Improved cooling of typical internally air-cooled gas turbine vanes and blades is proposed, with the intention of reducing temperature gradients within the blade material. Inside and/or outside blade surfaces are covered with the graphite foil, which has an anisotropic heat conductivity, as well as with the protective metal foil. It is supposed that the good contact heat transfer between the blade material and the graphite foil can be assured by vacuum. On the rotor blades, artificial roughening of internal surfaces can compensate the low strength of the graphite foil, but with external surfaces the problem is more complex. Numerical calculations of temperature distribution, performed for typical heat transfer conditions, show advantages of applying the graphite foil with anisotropic heat conductivity. Temperature gradients are substantially reduced by applying the graphite foil on the inside and/or outside surfaces of the turbine blade, compared to the turbine blade of the same geometry but without the graphite foil. When applied to cooling passages, the graphite foil can reduce local concentrations of the heat flux, and thus the cooling-air consumption can also be reduced. Although there are technological problems that have to be solved to enable a successful application of this new approach to the cooling of vanes and blades, its potential in reducing temperature gradients within the turbine blade material, simplifying the cooling channels geometry, and thus the reduction of the cooling air flow rate and the pressure drop, seems to be worth of investigation.
Izvorni jezik
Engleski
Znanstvena područja
Strojarstvo
