4335 RANS Analyses of Heat Transfer on Turbine Blades
Details
The present paper reports on bench-mark tests of Reynolds averaged Navier-Stokes (RANS) calculations of turbine blade heat transfer. Two sets of the bench-mark problems for the linear eddy-viscosity models with various modifications are solved by three dimensional steady-state calculation. The original models tested are the one-equation model by Spalart and Allmaras, the k-ε model and the k-ω model. One of the bench-mark problems, simulating a previous wind tunnel test, is prediction of local heat transfer coefficient on a stationary blade in a single cascade. Another one is estimation of local blade temperature by conjugate heat transfer calculation simulating an internal-cooling blade in a gas turbine. Computational results present that the k-ω model bounded by turbulence time scale and the shear stress transport (SST) model with the modified k production term reasonably simulate the measurements.
