Aerodynamic and acoustic analysis of an extruded airfoil with a trailing edge device using Detached Eddy Simulation with a Discontinuous Galerkin method

In this paper the Discontinuous Galerkin (DG) method is applied for the simulation of an airfoil with a small trailing edge device (TED). The method discretizes the Reynoldsaveraged Navier-Stokes (RANS) equations including the Spalart-Allmaras turbulence equation, which can be extended easily to a Detached Eddy Simulation (DES) model. As the DG method is a high-order method, the turbulent length scale is adapted with the polynomial degree of the basis function to take the cell interior into account. This adaptation is validated on two examples, a backward facing step and a circular cylinder. The acoustic evaluation of the TED case is carried out in a post-processing step with a Ffowcs WilliamsHawkings (FW-H) method. A comparison to wind tunnel tests and a standard finite volume (FV) method for both the aerodynamic results and the acoustic results is presented.

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