An aerodynamics simulation code for the Reynolds averaged Navier-Stokes (RANS) equations is developed using the spectral volume method for unstructured tetrahedral meshes. The turbulent viscosity is modeled by the Spalart-Allmaras (SA) one-equation model. The developed scheme is validated for turbulent flow over a flat plate and assessed for transonic flowfield over a wing compared with available CFD results. Then, the developed flow solver is applied to obtain complicated flows over high-lift devices. By comparing obtained results with the corresponding experimental data and the available numerical results, the capability to predict complicated flowfields has been favorably shown. And the applicability to large scale industrial problems has been also indicated.