Numerical Simulation of Supersonic Separated Flow over Inclined Backward-Facing Step Using RANS and LES Methods

A description of two methods for simulation of the flow around complex test configurations is considered. One method implements a well-known approach to solving the Reynolds-averaged Navier-Stokes equations with a closing differential turbulence model. Another method is based on scale-resolving wall-modelled LES approach (WMLES). The classical problem of the flow around the inclined backward-facing step with the generation of expansion waves, intensive shock waves and separated flow zones is considered. A comparison of computational and experimental data is done. The physics of the flow is described. The accuracy of the both approaches is evaluated.

[1]  S. M. Bosnyakov,et al.  Experience of validation and tuning of turbulence models as applied to the problem of boundary layer separation on a finite-width wedge , 2016 .

[2]  W. El-askary.  Simulation of supersonic turbulent flow in the vicinity of an inclined backward-facing step , 2011 .

[3]  D. Knight,et al.  Advances in CFD prediction of shock wave turbulent boundary layer interactions , 2003 .

[4]  Yufeng Yao,et al.  Direct numerical simulation of supersonic turbulent flows around a tandem expansion-compression corner , 2015 .

[5]  P. Spalart,et al.  A hybrid RANS-LES approach with delayed-DES and wall-modelled LES capabilities , 2008 .

[6]  F. Menter.  ZONAL TWO EQUATION k-w TURBULENCE MODELS FOR AERODYNAMIC FLOWS , 1993 .

[7]  Ugo Piomelli,et al.  Large-eddy simulation: achievements and challenges , 1999 .

[8]  A. P. Duben,et al.  Computational technologies for simulation of complex near-wall turbulent flows using unstructured meshes , 2014 .

[9]  Arthur Rizzi,et al.  Navier–Stokes solvers in European aircraft design , 2002 .

[10]  Pavel Alexeevisch Bakhvalov,et al.  Edge‐based reconstruction schemes for unstructured tetrahedral meshes , 2016 .

[11]  David S. Dolling,et al.  Fifty Years of Shock-Wave/Boundary-Layer Interaction Research: What Next? , 2001 .

[12]  Numerical simulation of the transonic turbulent flow around a wedge-shaped body with a backward-facing step , 2016 .

[14]  Philippe R. Spalart,et al.  Synthetic Turbulence Generators for RANS-LES Interfaces in Zonal Simulations of Aerodynamic and Aeroacoustic Problems , 2014 .

[15]  L. Cambier,et al.  elsA - An efficient object-oriented solution to CFD complexity , 2002 .

[16]  John Evans,et al.  Efficient Computation of 3D-Flows for Complex Configurations with the DLR-TAU Code , 1999 .

[17]  B. Chaouat.  The State of the Art of Hybrid RANS/LES Modeling for the Simulation of Turbulent Flows , 2017, Flow, turbulence and combustion.

[18]  A. Duben,et al.  Numerical investigation of the deflector effect on the aerodynamic and acoustic characteristics of turbulent cavity flow , 2017 .