Numerical modeling of two-phase transonic flow

0330946 - ÚT 2011 RIV NL eng J - Journal Article
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. E-ISSN 1872-7166
Grant - others:GA ČR(CZ) GA201/08/0012
Program: GA
Institutional research plan: CEZ:AV0Z20760514
Keywords : two-phase flow * condensation * fractional step method
Subject RIV: BK - Fluid Dynamics
Impact factor: 0.812, year: 2010
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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.
Permanent Link: http://hdl.handle.net/11104/0176604