JAXA’s Results of Fixed Grid RANS Simulations for the Fourth High Lift Prediction Workshop

This paper summarizes the Japan Aerospace Exploration Agency’s studies for the fourth AIAA CFD High Lift Prediction Workshop test cases. An unstructured grid Reynolds-Averaged Navier-Stokes CFD flow solver, TAS-code, is used to perform fully-turbulent flow simulations with variants of Spalart-Allmaras turbulence model. The verification study of the turbulence model of test case 3 in the flow solver is performed. Computations for flap deflection study of test case 1 are performed on two series of unstructured grids provided by the workshop organizing committee and a self-generated unstructured grid using an unstructured grid generator, MEGG3D, for comparisons. Grid convergence studies of test case 1 are performed on two series of committee-provided unstructured grids. Studies on different grid dependency and different version of Spalart-Allmaras turbulence models are performed on the Japan Aerospace Exploration Agency’s unstructured grid. Computations for CLmax study of test case 2 are performed on the Japan Aerospace Exploration Agency’s unstructured grid as the follow-on studies after workshop. The computational results are discussed by comparing with the experimental data.