Abstract
Unsteady 3-D flows through two-stage stator-rotor cascade channels in a model turbine are numerically investigated. Compressible Nervier-Stokes equations are solved by the fourth-order compact MUSCL TVD scheme, Roe's approximate Riemann solver, and the LU-SGS scheme. The SST-model is used for evaluating the eddy-viscosity. Condensate mass fractions, and condensate mass generation ratio which result from heterogeneous condensation and homogeneous condensation obtained by the 3-D calculations are compared with each other to examine influences of condensation on the flow. Finally, the differences between condensation structures resulting from heterogeneous condensation and homogeneous condensation are examined.
