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  • V tepelném režimu skořepinových forem, vyrobených metodou vytavitelného modelu se, významně uplatňuje přestup tepla sáláním, případně konvekcí do okolního prostředí, zatímco podíl tepla, akumulovaného formou je méně významný. U skořepin dochází ke vzájemnému osálávání stěn a vznikají nesymetrické tepelné toky směrem do osy stromečků a směrem vně. Rozboru tepelných poměrů se dosud věnovalo málo pozornosti a k dispozici nejsou ani ověřené termofyzikální parametry pro numerickou simulaci. Experimentálním měřením byly zjišťovány teplotní poměry při odlévání a tuhnutí modelové soustavy válcových odlitků různých průměrů, umístěných na prstencovém vtoku. Pomocí termočlánků byly měřeny průběhy teplot v jednotlivých odlitcích a ve stěnách skořepin. Odlévaným materiálem byla slitina N155 na bázi železa a niklu. Experimentálně zjištěné údaje byly použity jako signifikantní teploty při následné numerick (cs)
  • In the thermal regime of ceramic shell moulds made by the lost wax process the role of heat transfer by radiation or convection into the surrounding environment is significant while the portion of heat accumulated in the mould is less important. In ceramic shells the walls are mutually irradiated and there appear non-symmetrical heat flows in the direction of the axis of clusters and out of the clusters. Heat relations have up to now received little attention and no verified thermo-physical parameters are available for numerical simulation. Experimental measuring was used to establish the heat relations during casting and solidification of a model system of cylindrical castings of different diameters, which were placed on a ring gate. Thermocouples were used to measure the temperature behaviour in individual castings and in the walls of ceramic shells. The casting material was the N155 alloy based on iron, nickel and cobalt. The experimentally established data were used as significant temperatures in
  • In the thermal regime of ceramic shell moulds made by the lost wax process the role of heat transfer by radiation or convection into the surrounding environment is significant while the portion of heat accumulated in the mould is less important. In ceramic shells the walls are mutually irradiated and there appear non-symmetrical heat flows in the direction of the axis of clusters and out of the clusters. Heat relations have up to now received little attention and no verified thermo-physical parameters are available for numerical simulation. Experimental measuring was used to establish the heat relations during casting and solidification of a model system of cylindrical castings of different diameters, which were placed on a ring gate. Thermocouples were used to measure the temperature behaviour in individual castings and in the walls of ceramic shells. The casting material was the N155 alloy based on iron, nickel and cobalt. The experimentally established data were used as significant temperatures in (en)
Title
  • Thermal Processes in Pouring into Ceramic Shells and their Numerical Solution
  • Tepelné procesy při odlévání do skořepinových forem a jejich numerické řešení (cs)
  • Thermal Processes in Pouring into Ceramic Shells and their Numerical Solution (en)
skos:prefLabel
  • Thermal Processes in Pouring into Ceramic Shells and their Numerical Solution
  • Tepelné procesy při odlévání do skořepinových forem a jejich numerické řešení (cs)
  • Thermal Processes in Pouring into Ceramic Shells and their Numerical Solution (en)
skos:notation
  • RIV/00216305:26210/08:PU75715!RIV09-MPO-26210___
http://linked.open...avai/riv/aktivita
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  • P(FT-TA3/072)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
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  • 399893
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  • RIV/00216305:26210/08:PU75715
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  • thermal transport, shell moulds, solidification, (en)
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  • [3F34B379EABF]
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  • Opatija
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  • 8th International Foundrymen Conference
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  • Jaroš, Michal
  • Šikula, Ondřej
  • Šustek, Petr
  • Hrbáček, Karel
  • Joch, Antonín
  • Kováč, Marek
  • Roučka, Jaromír
http://linked.open...vavai/riv/typAkce
http://linked.open.../riv/zahajeniAkce
number of pages
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  • Universita Zagreb
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  • 978-953-7082-06-2
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  • 26210
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