Počet záznamů: 1  

Numerical modeling of two-phase transonic flow

  1. 1. 0330946 - UT-L 2011 RIV NL eng J - Článek v odborném periodiku
    Halama, Jan - Benkhaldoun, F. - Fořt, Jaroslav
    Numerical modeling of two-phase transonic flow.
    Mathematics and Computers in Simulation. Roč. 80, č. 88 (2010), s. 1624-1635 ISSN 0378-4754
    Grant ostatní:GA ČR(CZ) GA201/08/0012
    Výzkumný záměr: CEZ:AV0Z20760514
    Klíčová slova: two-phase flow * condensation * fractional step method
    Kód oboru RIV: BK - Mechanika tekutin
    Impakt faktor: 0.812, rok: 2010

    Our work is aimed at the development of numerical method for the modeling of transonic flow of wet steam including condensation/evaporation phase change. We solve a system of PDE's consisting of Euler or Navier-Stokes equations for the mixture of vapor and liquid droplets and transport equations for the integral parameters describing the droplet size spectra. Numerical method is based on a fractional step technique due to the stiff character of~source terms, i.e. we solve separately the set of homogenous PDE's by the finite volume method and the remaining set of ODE's either by explicit Runge-Kutta or implicit Euler method. The finite volume method is based on the Lax-Wendroff scheme with conservative artificial dissipation terms for structured grid. We also note result achieved by recently developed finite volume method with VFFC scheme. We discuss numerical results of steady and unsteady two-phase transonic flow in 2D nozzle, 2D and 3D turbine cascade and 2D turbine stage with moving rotor cascade.
    Trvalý link: http://hdl.handle.net/11104/0176604