Parametric study of transient spoiler aerodynamics with two-equation turbulence models

The transient response of an airfoil to a rapidly deploying spoiler is nume rically investigated using the turbulent compressible Navier-Stokes equatio ns in two dimensions. The algebraic Baldwin-Lomax model, Wilcox k-omega mod el, and shear stress transport k-omega turbulence models were used to calcu late the unsteady separated flow due to the rapid spoiler deployment. The s poiler motion relative to a stationary airfoil is treated using an overset grid bounded by a dynamic domain-dividing line, which has been devised by t he authors. The adverse effects of the spoiler influenced by the spoiler lo cation and the hinge gap are expounded. The numerical results are in reason ably good agreement with the existing experimental data.