Parametric Study of Transient Spoiler Aerodynamics with Two-Equation Turbulence Models

Abstract

The transient response of an airfoil to a rapidly deploying spoiler is numerically investigated using the turbulent compressible Navier-Stokes equations in two dimensions. The algebraic Baldwin-Lomax model, Wilcox k-omega model, and shear stress transport k-omega turbulence models were used to calculate the unsteady separated flow due to the rapid spoiler deployment. The spoiler motion relative to a stationary airfoil is treated using an overset grid bounded by a dynamic domain-dividing line, which has been devised by the authors. The adverse effects of the spoiler influenced by the spoiler location and the hinge gap are expounded. The numerical results are in reasonably good agreement with the existing experimental data.