NUMERICAL STUDY OF VORTEX-DOMINATED FLOWS FOR WINGS AT HIGH-INCIDENCE AND SIDESLIP

Three-dimensional viscous flows past a double-delta wing and a delta wing are numerically investigated. A computational method for calculating low-speed viscous flowfields is discussed. The time-iterative method uses an implicit upwind-relaxation finite difference algorithm with a nonsingular eigensystem to solve the preconditioned, three-dimensional, incompressible Navier-Stokes equations in curvilinear coordinates. An algebraic turbulence model is implemented to account for the eddy viscosity. The technique of local time stepping is incorporated to accelerate the rate of convergence to a steady-state solution. Computed results are compared with experimental data.