Large Eddy Simulation of Transonic Turbulent Flow Over an Airfoil Using a Shock Capturing Scheme with Zonal Embedded Mesh
TOHOKU UNIV SENDAI (JAPAN) INST OF FLUID SCIENCE
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In this study, large eddy simulationLES of transonic flow around the NACA 0012 airfoil is performed accounting for the Leonard stress terms, the cross-stress terms and the subgrid-scaleSGS Reynolds stress terms as the scale-similarity model at a free stream Mach number of 0.8, a Reynolds number of 9x10 exp 6 and an angle of attack of 2.26 degrees. An upwind finite volume formulation is used for the discretization of compressible spatial-filtered Navier-Stokes equations. To exclude excessive numerical damping due to the shock-capturing scheme, a hybrid method which uses linear combination of the third order upwind scheme and the TVD scheme is employed. To reduce the total number of grid points, zonal embedded mesh is employed in the present LES analysis, in which a computational domain is decomposed near the wall-boundary. In the ease represented here, it is shown that the statistical values in the turbulent boundary layer with shockturbulence interaction is able to be estimated, and characteristics are clarified on the statistic of the turbulence.
- Fluid Mechanics