About: A computationally efficient and accurate numerical representation of thermodynamic properties of steam condensing steam flow in steam turbines

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About: A computationally efficient and accurate numerical representation of thermodynamic properties of steam condensing steam flow in steam turbines Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Mathematical modeling of the non-equilibrium condensing transonic steam flow in the complex 3D geometry of a steam turbine is a demanding problem both concerning the physical concepts and the required computational power. Available accurate formulations of steam properties IAPWS-95 and IAPWS-IF97 require much computation time. For this reason, the modelers often accept the unrealistic ideal-gas behavior. Here we present a computation scheme based on a piecewise, thermodynamically consistent representation of the IAPWS-95 formulation. Density and internal energy are chosen as independent variables to avoid variable transformations and iterations. On the contrary to the previous Tabular Taylor Series Expansion Method, the pressure and temperature are continuous functions of the independent variables, which is a desirable property for the solution of the differential equations of the mass, energy, and momentum conservation for both phases. Mathematical modeling of the non-equilibrium condensing transonic steam flow in the complex 3D geometry of a steam turbine is a demanding problem both concerning the physical concepts and the required computational power. Available accurate formulations of steam properties IAPWS-95 and IAPWS-IF97 require much computation time. For this reason, the modelers often accept the unrealistic ideal-gas behavior. Here we present a computation scheme based on a piecewise, thermodynamically consistent representation of the IAPWS-95 formulation. Density and internal energy are chosen as independent variables to avoid variable transformations and iterations. On the contrary to the previous Tabular Taylor Series Expansion Method, the pressure and temperature are continuous functions of the independent variables, which is a desirable property for the solution of the differential equations of the mass, energy, and momentum conservation for both phases. (en)
Title	A computationally efficient and accurate numerical representation of thermodynamic properties of steam condensing steam flow in steam turbines A computationally efficient and accurate numerical representation of thermodynamic properties of steam condensing steam flow in steam turbines (en)
skos:prefLabel	A computationally efficient and accurate numerical representation of thermodynamic properties of steam condensing steam flow in steam turbines A computationally efficient and accurate numerical representation of thermodynamic properties of steam condensing steam flow in steam turbines (en)
skos:notation	RIV/61388998:_____/11:00367960!RIV12-AV0-61388998
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GAP101/11/1593), P(IAA200760905), P(LA09011), Z(AV0Z20760514)
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Hrubý, Jan
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav termomechaniky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	183725
http://linked.open...ai/riv/idVysledku	RIV/61388998:_____/11:00367960
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	steam turbine; equation of state; computational fluid dynamics (en)
http://linked.open.../riv/klicoveSlovo	steam turbine computational fluid dynamics equation of state
http://linked.open...ontrolniKodProRIV	[340DA95D34E9]
http://linked.open...v/mistoKonaniAkce	Jičín
http://linked.open...i/riv/mistoVydani	Liberec
http://linked.open...i/riv/nazevZdroje	International Conference Experimental Fluid Mechanics 2011
http://linked.open...in/vavai/riv/obor	BJ
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	1 (xsd:int)
http://linked.open...vavai/riv/projekt	Investigation of non-equilibrium steam condensation: A new approach Thermophysical properties of water in unexplored, technologically significant regions International collaboration in the research of the properties of water and aqueous mixtures in the framework of IAPWS
http://linked.open...UplatneniVysledku	2011
http://linked.open...iv/tvurceVysledku	Hrubý, Jan
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open.../riv/zahajeniAkce	2011-11-22 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Complex dynamical systems in thermodynamics, fluid and solid mechanics
number of pages	10 (xsd:int)
http://purl.org/ne...btex#hasPublisher	TU Liberec
https://schema.org/isbn	978-80-7372-784-0

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