Flow and noise predictions around tandem cylinders using DDES approach with SU2

Abstract

© 2019, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.Flow and noise predictions of the tandem cylinder benchmark are performed using the open-source computational fluid dynamics code (CFD) Stanford University Unstructured (SU2). The numerical results were obtained using the Delayed Detached Eddy Simulation (DDES) approach with the new shear-layer adapted sub-grid length scale (SGS) for faster transition between RANS and LES. The Ffowcs Williams–Hawkings (FWH) analogy is used to propagate the pressure fluctuations to the farfield. Both flow and noise results are compared with experimental measurements from the Basic Aerodynamic Research Tunnel (BART) and Quiet Flow Facility (QFF) at NASA Langley Research Center. The compressible simulations are carried out on the mandatory 2-D grid from the ATAAC project with a spanwise extension of 3.0D, two different spanwise discretization were used to analyze the discretization effect. The comparison shows that the shear-layer adapted (∆SL A) is less grid dependent and more accurate than the standard (∆max) SGS.