Wall-resolved large eddy simulation over NACA0012 airfoil

The work presented here forms part of a project on Large-Eddy Simu lation (LES) of aeroengine aeroacoustic interactions. In this paper we concentrate on LES of near-field flo w over an isolated NA CA0012 airfo il at zero angle of attack with Re c=2e 5 . The pred icted unsteady pressure/velocity field is used in an analytically-based scheme for far-field trailing edge noise prediction. A wall resolved implicit LES or so-callednumerical Large Eddy Simu lation (NLES) approach is emp loyed to resolve streak-like structure in the near-wall flow regions. The mean and RMS velocity and pressure profile on airfoil surface and in wake are validated against experimental data and computational results fro m other researchers. The results of the wall-resolved NLES method are very encouraging. The effects of grid-refinement and h igher-order nu merical scheme on the wall-resolved NLES approach are also discussed.

[1]  Paul G. Tucker,et al.  Turbulence modelling of problem aerospace flows , 2006 .

[2]  S. Ghosal.  An Analysis of Numerical Errors in Large-Eddy Simulations of Turbulence , 1996 .

[3]  Lars Davidson,et al.  Large Eddy Simulation of the Flow Around an Airfoil , 2001 .

[4]  William N. Dawes.  Detached-eddy simulation of transonic flow past a fan-blade section , 2009 .

[5]  Paul G. Tucker,et al.  Wall-Resolved LES and Zonal LES of Round Jet Impingement Heat Transfer on a Flat Plate , 2011 .

[6]  P. Moin,et al.  A further study of numerical errors in large-eddy simulations , 2003 .

[7]  M. Strelets,et al.  Al A A 2001-0879 Detached Eddy Simulation of Massively Separated Flows , 2001 .

[8]  P. Roe.  Approximate Riemann Solvers, Parameter Vectors, and Difference Schemes , 1997 .

[9]  Garcia Sagrado,et al.  Boundary layer and trailing edge noise sources , 2008 .

[10]  Paul G. Tucker,et al.  LES of Impingement Heat Transfer on a Concave Surface , 2010 .

[11]  Miguel R. Visbal,et al.  Implicit Large Eddy Simulation of Low Reynolds Number Flow Past the SD7003 Airfoil , 2008 .

[12]  Nigel Peake,et al.  Grid-Refined LES Predictions for Fan-OGV Broadband Noise , 2009 .

[13]  Howard P. Hodson,et al.  Experimental Investigation Into Trailing Edge Noise Sources , 2006 .

[14]  Philippe R. Spalart,et al.  Detached-eddy simulation of an airfoil at high angle of attack , 1999 .

[15]  Nigel Peake,et al.  Large eddy simulations for fan-OGV broadband noise prediction , 2008 .

[16]  B. V. Leer,et al.  Towards the ultimate conservative difference scheme V. A second-order sequel to Godunov's method , 1979 .

[17]  M. Strelets.  Detached eddy simulation of massively separated flows , 2001 .

[18]  F. Fahy,et al.  Mechanics of flow-induced sound and vibration , 1989 .

[19]  Neil D. Sandham,et al.  Large Eddy Simulation of Flow Around an Airfoil Near Stall , 2010 .

[20]  Per-Olof Persson,et al.  Implicit Large Eddy Simulation of Transitional Flows Over Airfoils and Wings , 2009 .

[21]  F. Grinstein,et al.  Recent Progress on MILES for High Reynolds Number Flows , 2002 .

[22]  A. U.S.,et al.  Implicit Large Eddy Simulation of Transitional Flows Over Airfoils and Wings , 2009 .

[23]  Ting Wang,et al.  Separated-Flow Transition: Part 1 — Experimental Methodology and Mode Classification , 1998 .

[24]  S. Pope.  Ten questions concerning the large-eddy simulation of turbulent flows , 2004 .

[25]  Paul G. Tucker,et al.  Computation of Unsteady Internal Flows , 2001 .

[26]  Andrey Garbaruk,et al.  Further Steps in LES-Based Noise Prediction for Complex Jets , 2006 .

[27]  C. Bogey,et al.  Direct Noise Computation of the Turbulent Flow Around a Zero-Incidence Airfoil , 2008 .

[28]  P. Sagaut,et al.  Large Eddy Simulation of Flow Around an Airfoil Near Stall , 2002 .