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Numerical solution of transonic flow of steam with non-equilibrium phase change using typical and simplified method

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F18%3A00320336" target="_blank" >RIV/68407700:21220/18:00320336 - isvavai.cz</a>

  • Výsledek na webu

    <a href="https://ac.els-cdn.com/S0096300317303454/1-s2.0-S0096300317303454-main.pdf?_tid=c80d0421-d73f-4459-8fd1-b404258c23b5&acdnat=1522056861_241db426c430ab4a433d99c95732fd22" target="_blank" >https://ac.els-cdn.com/S0096300317303454/1-s2.0-S0096300317303454-main.pdf?_tid=c80d0421-d73f-4459-8fd1-b404258c23b5&acdnat=1522056861_241db426c430ab4a433d99c95732fd22</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.amc.2017.05.044" target="_blank" >10.1016/j.amc.2017.05.044</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Numerical solution of transonic flow of steam with non-equilibrium phase change using typical and simplified method

  • Popis výsledku v původním jazyce

    Simulation of transonic flow of steam with phase changes represents rather complex problem. One has to consider several simplifications to obtain a flow model, which is computationally adequate. Typical current simulations are based on the solution of transport equations for the mixture and additional transport equations for the liquid phase. The creation of new droplets and the growth of already existing droplets is included in the form of source terms, which require a special treatment for time integration. The aim of this paper is to compare an alternative simplified method with a typical method. The alternative simplified method uses no additional transport equations and the non-equilibrium phase change is included in a form of switch from the meta-stable state to the equilibrium state, i.e. switch from the zero to the equilibrium wetness. Although this simplified method cannot provide details about droplet size, it can still be interesting tool for the early steps of the turbine design. Both methods are based on the numerical solution of governing equations using a finite volume method. The advantages and disadvantages of simplified method with respect to typical method are discussed and demonstrated on simulations of flow in nozzle and turbine cascades.

  • Název v anglickém jazyce

    Numerical solution of transonic flow of steam with non-equilibrium phase change using typical and simplified method

  • Popis výsledku anglicky

    Simulation of transonic flow of steam with phase changes represents rather complex problem. One has to consider several simplifications to obtain a flow model, which is computationally adequate. Typical current simulations are based on the solution of transport equations for the mixture and additional transport equations for the liquid phase. The creation of new droplets and the growth of already existing droplets is included in the form of source terms, which require a special treatment for time integration. The aim of this paper is to compare an alternative simplified method with a typical method. The alternative simplified method uses no additional transport equations and the non-equilibrium phase change is included in a form of switch from the meta-stable state to the equilibrium state, i.e. switch from the zero to the equilibrium wetness. Although this simplified method cannot provide details about droplet size, it can still be interesting tool for the early steps of the turbine design. Both methods are based on the numerical solution of governing equations using a finite volume method. The advantages and disadvantages of simplified method with respect to typical method are discussed and demonstrated on simulations of flow in nozzle and turbine cascades.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    20303 - Thermodynamics

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/EF16_019%2F0000826" target="_blank" >EF16_019/0000826: Centrum pokročilých leteckých technologií</a><br>

  • Návaznosti

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Ostatní

  • Rok uplatnění

    2018

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název periodika

    APPLIED MATHEMATICS AND COMPUTATION

  • ISSN

    0096-3003

  • e-ISSN

    1873-5649

  • Svazek periodika

    319

  • Číslo periodika v rámci svazku

    February

  • Stát vydavatele periodika

    US - Spojené státy americké

  • Počet stran výsledku

    11

  • Strana od-do

    499-509

  • Kód UT WoS článku

    000415906200039

  • EID výsledku v databázi Scopus

    2-s2.0-85019926879