High pressure turbines are subjected to high temperature flow exiting the combustion chamber. This paper presents a reliable method for a conjugate heat transfer (CHT) procedure using different interface treatments. Indeed, a coupled approach is used to properly capture the transient heat load variations at the interface and have a better estimatio...
The high pressure (HP) turbine is subject to high temperature inlet flow non-uniformities resulting from the combustion chamber. This paper presents a new fluid-solid interface treatment for conjugate heat transfer (CHT) applied to two configurations of interest in the design of high pressure turbine blades to accurately estimate the temperature in...
Improvement of the calcium-magnesium aluminosilicate (CMAS) infiltration mitigation concept in thermal barrier coatings (TBC) requires fundamental data on thermochemical reaction involving rare-earth oxide candidate as ZrO2 alloying element. This study investigates, through a model approach, Gd2O3 dissolution at 1200 °C in a synthetic model CAS mel...
Environmental/thermal barrier coatings (E/TBCs) of yttria partially stabilised zirconia (YSZ), gadolinium zirconate (GZO) and a combination of Y2SiO5 and GZO were applied on a Nb/Nb5Si3-based alloy with the nominal composition of Nb-25Ti-8Hf-2Cr-2Al-16Si (at%). A B-containing M7Si6-based (M=Ti, Nb, Fe, Cr) layer produced by pack cementation was use...
L’objectif de ce travail de thèse est de mettre en place une simulation thermo-mécanique couplée d’une aube revêtue permettant de modéliser l’écaillage de la barrière-thermique qui survient dans les conditions de service de l’aube. La barrière thermique est un revêtement isolant déposé à la surface du substrat monocristallin base Nickel AM1 constit...
Developing thermal barrier coatings operating at higher temperature and/or for very long durations (commercial aircraft applications) is one of the technological and economical challenges for engine manufacturers. This includes the search for (i) low thermal conductivity, high thermal stability and CMAS resistant ceramic top coat, and (ii) alternat...
Thermal barrier coatings are used to protect blades and vanes in the hot sections of gas turbines. They consist of a thick porous ceramic layer deposited on an alumina forming metallic bond coat in contact with the nickel-based superalloy substrate. They are designed to prolong the components lifetimes or to increase gas temperature, and therefore ...
Germany
Available from TIB Hannover: DtF QN1(94,36) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische Informationsbibliothek / SIGLE / Forschungszentrum Juelich GmbH (Germany). Projekttraeger Neue Materialien und Chemische Technologien (NMT); Bundesministerium fuer Bildung und Forschung, Berlin (Germany) / DE / Germany
