RANS Prediction of Aerodynamic Characteristics of CRM-HL Configuration Using OpenFOAM for the HLPW-5

This paper presents the results of numerical simulations obtained during the work of the RANS Technology Research Group (RANS-TFG) (subgroup R-004) within the framework of the High Lift Prediction Workshop 5. The computational simulations were performed using the open source CFD code Open FOAM and the required meshes were generated using ICEM CFD software and Siemens Star-CCM+ code, which are capable of generating high quality structured/unstructured grids compatible with the Open FOAM platform. Group R-004 was focused on two major studies: Test case 1, the verification case for a pre-stall angle of attack considering a wing-body configuration and Test case 2, the configuration build-up study with gradual increase of geometry complexity by adding horizontal tail, vertical tail, fairings, slats and slat tracks, flaps and finally nacelle-pylons. The agreement of RANS simulations results with experimental data as the complexity of the geometry increases is assessed along with the residuals convergence and sufficient grid independence. RANS simulation results are presented and discussed showing the presence of static aerodynamic hysteresis for Test Case 1 and Test Case 2.2, which exhibit two different flow separation patterns at the same angle of attack.