Title of article :
Numerical study of two-dimensional heaving airfoils in ground effect
Author/Authors :
Liang، نويسنده , , Hui and Wang، نويسنده , , Xijun and Zou، نويسنده , , Li and Zong، نويسنده , , Zhi، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Abstract :
In this study, a potential-flow-based discrete vortex method is used to investigate heaving airfoils for a wing in ground effect (WIG) over a rigid surface and over progressive water waves. Three types of oscillations are analyzed, including forced harmonic oscillations over a rigid surface, harmonic oscillations over water waves and self-excited oscillations over water waves. In addition, the roll-up of the shed wake vortices is considered. Numerical results for unsteady airfoils with the three types of oscillations over a rigid surface and over incident water waves are presented. Satisfactory agreement with numerical results reported in the literature is documented. Interestingly, the phenomenon of water bump can be observed.
Keywords :
Unsteady motion , Wing in ground effect , Discrete vortex method , Roll-up , Water bump
Journal title :
Journal of Fluids and Structures
Journal title :
Journal of Fluids and Structures