TURBULENT TRANSONIC AIRFOIL FLOW SIMULATION USING A PRESSURE-BASED ALGORITHM

There are few successful computational reports for transonic airfoil now worked out with the pressure-based method. In this study, an advanced approach based on a pressure correction scheme is developed to solve the Reynolds-averaged Navier-Stokes equations for turbulent transonic now around the airfoil RAE 2822. An implicit numerical dissipation model is adopted to create a dissipation mechanism based on pressure gradients to damp the destabilizing numerical effects, without smearing the physical discontinuity at shocks. The standard k-epsilon turbulence closure with a near-wall one-equation model is used. The computational results are compared with experimental data. Several discretization schemes such as the second-order upwind, hybrid, and MUSCL schemes for convection terms are investigated. The computational results show that the proposed pressure-based method has a resolution comparable to, or better than, the traditional time-marching methods.