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  • This work deals with a numerical solution of 2D transonic flow of a mixture composed of vapor and liquid phase (droplets). The flow of the mixture is modelled by the Euler or Navier-Stokes equations. The whole spectra of droplets is described by the Hill's approximation. Governing equations are closed by the equation for the pressure. Due to a big differences between time scales of convection-diffusion and condensation phenomena a particular version of a fractional step method with the different time steps for individual sub-problems has been developed. The convection-diffusion part is solved by finite volume cell-vertex method based on the Lax-Wendroff scheme with artifical viscosity terms. The condensation part is solved by the two-stage Runge-Kutta method. Comparison of numerical results with experimental data for Barschdorff convergent-divergent nozzle is provided. Numerical results of 2D flow in an axial turbine are discussed.
  • This work deals with a numerical solution of 2D transonic flow of a mixture composed of vapor and liquid phase (droplets). The flow of the mixture is modelled by the Euler or Navier-Stokes equations. The whole spectra of droplets is described by the Hill's approximation. Governing equations are closed by the equation for the pressure. Due to a big differences between time scales of convection-diffusion and condensation phenomena a particular version of a fractional step method with the different time steps for individual sub-problems has been developed. The convection-diffusion part is solved by finite volume cell-vertex method based on the Lax-Wendroff scheme with artifical viscosity terms. The condensation part is solved by the two-stage Runge-Kutta method. Comparison of numerical results with experimental data for Barschdorff convergent-divergent nozzle is provided. Numerical results of 2D flow in an axial turbine are discussed. (en)
  • Tato práce se zabývá numerickým řešením 2D transsonického proudění směsi páry a kapaliny (kapek) . Proudění směsi je popsáno Eulerovými nebo Navierovými-Stokesovými rovnicemi. Celé spektrum kapek je popsáno pomocí Hillovy aproximace. Výchozí rovnice jsou uzavřeny rovnicí pro tlak. Kvůli velkým rozdílům v časových měřítkách konvekce-difuze a kondenzace byla vyvinuta metoda založená na metodě rozkladu operátoru. Část konvekce-difuze je řešena metodou konečných objemů cell-vertex založenou na Laxově-Wendroffově schématu s přidanou umělou vazkostí. Část kondenzace je řešena pomocí Rungovy-Kuttovy dvoustupňové metody. Srovnání numerických výsledků s experimentálními daty je provedeno pro Barschdorffovu dýzu. Dále jsou diskutovány numerické výsledky 2D proudění v turbínové mříži. (cs)
Title
  • Numerical Solution of Transonic Flow with Condensation
  • Numerical Solution of Transonic Flow with Condensation (en)
  • Numerické řešení transsonického proudění s kondenzací (cs)
skos:prefLabel
  • Numerical Solution of Transonic Flow with Condensation
  • Numerical Solution of Transonic Flow with Condensation (en)
  • Numerické řešení transsonického proudění s kondenzací (cs)
skos:notation
  • RIV/68407700:21220/05:02110518!RIV06-GA0-21220___
http://linked.open.../vavai/riv/strany
  • 55 ; 55
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  • P(GA101/05/2536)
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  • 533554
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  • RIV/68407700:21220/05:02110518
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  • condensation; finite volume method; fractional step method; two-phase flow (en)
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  • [63B938065F2C]
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  • Praha
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  • Praha
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  • The 16th International Symposium on Transport Phenomena
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  • Fořt, Jaroslav
  • Halama, Jan
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number of pages
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  • České vysoké učení technické v Praze
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  • 80-86786-04-8
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  • 21220
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