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

The transient response of an airfoil to a rapidly deploying spoiler is numerically investigated using theturbulent compressibleNavier ‐Stokesequationsintwodimensions.ThealgebraicBaldwin ‐Lomaxmodel,Wilcox k‐!model, andshearstresstransport k‐!turbulencemodelswereusedtocalculatetheunsteadyseparatede owduetotherapid spoilerdeployment. The spoiler motion relative to a stationary airfoil istreated using an overset grid bounded by a dynamic domain-dividing line, which hasbeen devised by theauthors. The adverse effects of the spoiler ine uenced by the spoiler location and the hinge gap are expounded. The numerical results are in reasonably good agreement with the existing experimental data.

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