Aerodynamic and Acoustic Simulations of Thick Flatback Airfoils Employing High Order DES Methods,Advanced Theory and Simulations

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Aerodynamic and Acoustic Simulations of Thick Flatback Airfoils Employing High Order DES Methods
Advanced Theory and Simulations ( IF 2.9 ) Pub Date : 2022-05-12 , DOI: 10.1002/adts.202200129
Galih Bangga ₁ , Ferdinand Seel ₁ , Thorsten Lutz ₁ , Timo Kühn ₂

Affiliation

The results of high fidelity aerodynamic and acoustic computations of thick flatback airfoils are reported in the present paper. The studies are conducted on a flatback airfoil having a relative thickness of 30% with the blunt trailing edge thickness of 10% relative to chord. Delayed Detached-Eddy Simulation (DDES) approaches in combination with high order (5th) flux discretization WENO (Weighted Essentially Non-Oscillatory) and

l^{2} R o e $l^{2}Roe$

Riemann solver are employed. Two variants of the DES length scale calculation methods are compared. The results are validated against experimental data with good accuracy. The studies provide guideline on the mesh and turbulence modeling selection for flatback airfoil simulations. The results indicate that the wake breakdown is strongly influenced by the spanwise resolution of the mesh, which directly contributes to the prediction accuracy especially for drag force and noise emission. The Reynolds normal stress