Název: A computationally efficient and accurate numerical representation of thermodynamic properties of steam condensing steam flow in steam turbines
Autoři: Hrubý, Jan
Typ dokumentu: Příspěvky z konference
Konference/Akce: Experimental Fluid Mechanics 2011, Jičín (CZ), 2011-11-22 / 2011-11-25
Rok: 2011
Jazyk: eng
Abstrakt: 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.
Klíčová slova: computational fluid dynamics; equation of state; steam turbine
Číslo projektu: CEZ:AV0Z20760514 (CEP), IAA200760905 (CEP), GAP101/11/1593 (CEP), LA09011 (CEP)
Poskytovatel projektu: GA AV ČR, GA ČR, GA MŠk
Zdrojový dokument: International Conference Experimental Fluid Mechanics 2011, ISBN 978-80-7372-784-0

Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0006693

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-80942


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference