Summary of JAXA Studies for the Second AIAA CFD High Lift Prediction Workshop Using Structured and Unstructured Mesh CFD

摘要

This paper summarizes JAXA studies using a structured grid solver UPACS and an unstructured grid solver TAS-code by JAXA for the second AIAA CFD High Lift Prediction Workshop (HiLiftPW-2) test cases and follow-on problems. Computations are performed for the grid convergence study of the test case 1 on a series of multi-block structured grids and a series of unstructured grids provided by the HiLiftPW-2 committee. The verification of the turbulence models of the test case 4 is also performed in UPACS. In this paper, the fallowings are mainly discussed using the test cases 1 and 4: (1) grid convergence studies for Spalart-Allmaras (SA) and shear stress transport (SST) turbulence models using UPACS, (2) change of grid convergence and predicted flow fields with and without a nonlinear quadratic constitutive relation (QCR) model for SA and SST turbulence models using UPACS including evaluation at higher angles of attack, (3) comparison studies using different solvers UPACS and TAS on different grid systems with and without the QCR model for the SA model.