Numerical Solution of 2D Wet Steam Flow with Non-equilibrium Condensation and Real Thermodynamics
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F15%3A00234304" target="_blank" >RIV/68407700:21220/15:00234304 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1063/1.4912347" target="_blank" >http://dx.doi.org/10.1063/1.4912347</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.4912347" target="_blank" >10.1063/1.4912347</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Numerical Solution of 2D Wet Steam Flow with Non-equilibrium Condensation and Real Thermodynamics
Popis výsledku v původním jazyce
An approach to modeling of wet steam flow with non-equilibrium condensation phenomenon is presented. The first part of our flow model is homogeneous Euler system of transport equations for mass, momentum and total energy of wet steam (mixture). The additional second part describes liquid phase via non-homogeneous system of transport equations for moments of droplets number distribution function and relies on corrected classical nucleation theory. Moment equations are closed by linearization of droplet growth rate model. All necessary relations for thermodynamic properties of steam are provided by IAPWS set of equations. However, properties of condensate are simply modeled by liquid saturation data. Two real equations of state are implemented. Recently developed CFD formulation for entropy (does not require iteration process) and so-called IAPWS special gas equation for Helmholtz energy (one iteration loop is necessary). Flow model is validated on converging-diverging supersonic nozzle with Barschdorff geometry. Simulations were performed by in-house CFD code based on finite volume method and stiff character of equations was solved by symmetrical time operator splitting. Achieved results satisfactorily agreed with experimental data.
Název v anglickém jazyce
Numerical Solution of 2D Wet Steam Flow with Non-equilibrium Condensation and Real Thermodynamics
Popis výsledku anglicky
An approach to modeling of wet steam flow with non-equilibrium condensation phenomenon is presented. The first part of our flow model is homogeneous Euler system of transport equations for mass, momentum and total energy of wet steam (mixture). The additional second part describes liquid phase via non-homogeneous system of transport equations for moments of droplets number distribution function and relies on corrected classical nucleation theory. Moment equations are closed by linearization of droplet growth rate model. All necessary relations for thermodynamic properties of steam are provided by IAPWS set of equations. However, properties of condensate are simply modeled by liquid saturation data. Two real equations of state are implemented. Recently developed CFD formulation for entropy (does not require iteration process) and so-called IAPWS special gas equation for Helmholtz energy (one iteration loop is necessary). Flow model is validated on converging-diverging supersonic nozzle with Barschdorff geometry. Simulations were performed by in-house CFD code based on finite volume method and stiff character of equations was solved by symmetrical time operator splitting. Achieved results satisfactorily agreed with experimental data.
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
BK - Mechanika tekutin
OECD FORD obor
—
Návaznosti výsledku
Projekt
—
Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2015
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2014 (ICNAAM-2014)
ISBN
978-0-7354-1287-3
ISSN
0094-243X
e-ISSN
—
Počet stran výsledku
4
Strana od-do
-1
Název nakladatele
AIP Conference Proceedings
Místo vydání
New York
Místo konání akce
Rhodes, Greece
Datum konání akce
22. 9. 2014
Typ akce podle státní příslušnosti
WRD - Celosvětová akce
Kód UT WoS článku
000355339700042