Numerical Simulation of Non-equilibrium Condensation of Steam in Turbine Flows

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Numerical Simulation of Non-equilibrium Condensation of Steam in Turbine Flows

Popis výsledku v původním jazyce

The paper describes numerical simulation of transonic flow of steam with non-equilibrium condensation in turbines. Simulations are based on a single-fluid model for mixture of vapor and droplets. The thermodynamic properties of steam are considered in form of perfect gas model and the real gas model of IAPWS for metastable region. All simulations have been performed using in-house developed finite volume codes. Non-equilibrium condensation is modeled by additional transport equations for liquid phase “moments”. These equations contain also nucleation and droplet growth source terms. Alternative condensation model, which approximates the non-equilibrium behavior by a “switch” from zero to equilibrium wetness is also presented. The latter model is intended rather for axisymmetric flow code using coarse structured grid. Its usability for turbine cascade flow simulations is discussed.

Název v anglickém jazyce

Numerical Simulation of Non-equilibrium Condensation of Steam in Turbine Flows

Popis výsledku anglicky

The paper describes numerical simulation of transonic flow of steam with non-equilibrium condensation in turbines. Simulations are based on a single-fluid model for mixture of vapor and droplets. The thermodynamic properties of steam are considered in form of perfect gas model and the real gas model of IAPWS for metastable region. All simulations have been performed using in-house developed finite volume codes. Non-equilibrium condensation is modeled by additional transport equations for liquid phase “moments”. These equations contain also nucleation and droplet growth source terms. Alternative condensation model, which approximates the non-equilibrium behavior by a “switch” from zero to equilibrium wetness is also presented. The latter model is intended rather for axisymmetric flow code using coarse structured grid. Its usability for turbine cascade flow simulations is discussed.

Druh

O - Ostatní výsledky

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

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