Advanced High Temperature Turbine Seals Materials and Designs

Smarsly, Wilfried; Zheng, Nihua; Buchheim, Cláudia Sofia de Andrade Redondo Murilhas; Nindel, C.; Silvestro, Claudio; Sporer, D.; Tuffs, M.; Schreiber, K.A.; Langlade-Bomba, C.; Andersen, Olaf; Goehler, H.; Simms, N.J.; McColvin, G.

doi:10.4028/www.scientific.net/msf.492-493.21

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…The elements are sealed with a thin layer of impermeable and opaque coating. Such high-temperature ceramic sealings have been proposed for applications in hypersonic engine components and gas turbines [41] and ceramic microreactors [42]. Gases are distributed and collected from the porous ceria through hollow cylindrical inlet and outlet zones inside the reactive element, referred to as inlet and outlet channels, respectively.…”

Section: Problem Statementmentioning

confidence: 99%

Transient heat and mass transfer analysis in a porous ceria structure of a novel solar redox reactor

Chandran

Bader

Lipiński

2015

International Journal of Thermal Sciences

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a b s t r a c tThermal transport processes are numerically analyzed for a porous ceria structure undergoing reduction in a novel redox reactor for solar thermochemical fuel production. The cylindrical reactor cavity is formed by an array of annular reactive elements comprising the porous ceria monolith integrated with gas inlet and outlet channels. Two configurations are considered, with the reactor cavity consisting of 10 and 20 reactive elements, respectively. Temperature dependent boundary heat fluxes are obtained on the irradiated cavity wall by solving for the surface radiative exchange using the net radiation method coupled to the heat and mass transfer model of the reactive element. Predicted oxygen production rates are in the range 40e60 mmol s À1 for the geometries considered. After an initial rise, the average temperature of the reactive element levels off at 1660 and 1680 K for the two geometries, respectively. For the chosen reduction reaction rate model, oxygen release continues after the temperature has leveled off which indicates that the oxygen release reaction is limited by chemical kinetics and/or mass transfer rather than by the heating rate. For a fixed total mass of ceria, the peak oxygen release rate is doubled for the cavity with 20 reactive elements due to lower local oxygen partial pressure.

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Section: Problem Statementmentioning

confidence: 99%

Transient heat and mass transfer analysis in a porous ceria structure of a novel solar redox reactor

Chandran

Bader

Lipiński

2015

International Journal of Thermal Sciences

View full text Add to dashboard Cite

show abstract

“…These are manufactured from high-temperature alloys, such as Hastelloy X and Haynes 214, N07214 [94]. The honeycomb is manufactured from thin metal foil with thicknesses in the range 70-130 μm.…”

Section: Honeycomb and Hole-slot Sealsmentioning

confidence: 99%