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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

LARGE EDDY SIMULATION APPLIED TO INTERNAL FORCED-CONVECTION COOLING OF GAS-TURBINE BLADES

Get access (open in a dialog) DOI: 10.1615/IHTC11.1320
pages 565-570

摘要

Heat transfer in an orthogonally rotating rib-roughened square duct was numerically simulated by using the fourth order finite difference method. In order to investigate the effect of the Coriolis force on the turbulence, the large eddy simulation was performed with a dynamic subgrid scale model. The present results clearly showed the high correlation between shear stress and heat transfer coefficients in an instantaneous field. The rotation caused the larger peripheral variation both in shear stress and heat transfer. As compared to the stationary smooth duct case, the friction coefficient and the overall Nusselt number were increased by the factor of 5.7 and 2.1, respectively. In addition to these factors, the present numerical results agreed well with the experimentally observed characteristics.