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