Numerical simulation of turbine cascade flow with blade-fluid heat exchange

The work deals with the numerical simulation of turbulent flow through turbine cascades including heat exchange between fluid and blades. The numerical algorithm couples an implicit AUSM finite volume solver for fluid flow and a finite element solver for heat conduction inside the blade. Several k-omega turbulence models are applied. The eddy diffusivity assumption is used for turbulent heat flux computation. The influence of inlet boundary conditions for turbulence models is discussed. A case of failure of eddy diffusivity turbulent heat flux with common value of turbulent Prandtl number Pr-t = 0.91 is presented, where remedy is achieved by lowering the magnitude of Prt. (C) 2011 Elsevier Inc. All rights reserved.