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NUMERICAL SIMULATION OF THE ENDWALL HEAT TRANSFER IN THE LANGSTON CASCADE

DOI: 10.1615/ICHMT.2009.HeatTransfGasTurbSyst.400
8 pages

Alexander M. Levchenya
Department of Aerodynamics, Peter the Great St.Petersburg Polytechnic University, Polytechnicheskaya, 29, St.Petersburg, 195251, Russia

Evgueni M. Smirnov
Department of Hydro- and Aerodynamics at the Saint-Petersburg Polytechnic University, Polytechnicheskaya, 29, St. Petersburg, 195251, Russia

Dmitry K. Zaytsev
Department of Aerodynamics, St. Petersburg State Polytechnic University, Russia

要約

Complex three-dimensional turbulent flow and heat transfer in a large-scale turbine blade cascade is simulated using Wilcox k-omega and Menter SST turbulence models. The simulation results are compared with each other and with experimental data. The computed flow field and the endwall heat transfer are shown to be rather sensitive to the turbulence model, especially for the case of a thicker inlet boundary layer. For this case, the SST model yields a reasonable prediction of the flow and pressure losses, whereas k-omega model results in a simplified structure of secondary flows because of excessive level of the eddy viscosity. The endwall heat transfer is predicted satisfactory in the leading part of the passage; downstream of the blades the measured distribution of the heat transfer coefficient is not reproduced in the solution.

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