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Simple Improvements in the SST-DES Formulation for Mild Aerofoil Trailing-Edge Separation

  • Xiangyu WangEmail author
  • Dong Li
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 130)

Abstract

We present an improved Detached Eddy Simulation (DES) based on the SST turbulence model, WAD SST-DES, for accelerating the Large Eddy Simulation (LES) development in mixing layers. Similar to WAD-DES based on the SA turbulence model proposed by Wang and Qin, the formulation of Yoshizawa’s k-equation-like subgrid model in LES zones in the original SST-DES is rewritten as a standard one to end the previous turbulence transfer in the interface between the RANS and LES regions, and the numerical results for flow around A-aerofoil show that these improvements efficiently weaken the influence of the grey area while delaying the RANS at the boundary, in a manner similar to DDES. In addition, we discuss the influence of several coefficients in the improved SST-DES; these coefficients may play a very important role in the final simulation results.

Keywords

Large Eddy Simulation Turbulent Viscosity Detach Eddy Simulation Thick Boundary Layer Delay Detach Eddy Simulation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.School of AeronauticsNorthwestern Polytechnical UniversityXi’anChina

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