Numerical Investigation on Flow Separation Control of Low Reynolds Number Sinusoidal Aerofoils

Jesline Joy, Imran H. Ibrahim, Tze How New
2016 46th AIAA Fluid Dynamics Conference   unpublished
The paper presents a computational analysis of the characteristics of a NACA 63 4 -021 aerofoil incorporated with sinusoidal leading-edge protuberances at Re = 14,000. The protuberances are characterized by an amplitude and wavelength of 12% and 50% of the aerofoil chord length respectively. An unsteady Reynolds Average Navier Stokes (RANS) analysis of the full-span aerofoils was carried out using Transition SST (Shear Stress Transport) turbulence model across five different angles-of-attack
more » ... A). Comparisons with previous experimental results reported good qualitative agreements in terms of flow separation when the aerofoils are pitched at higher AOAs. Results presented here comprised of near-wall flow visualizations of the flow separation bubble at the peaks and troughs of the protuberances. Additionally, results indicate that the aerofoil with leading-edge protuberances displayed distinctive wall shear streamline and iso-contour characteristics at different span-wise positions. This implies that even at a low Reynolds number, implementations of these leading-edge protuberances could have positive or adverse effects on flow separation. I.
doi:10.2514/6.2016-3949 fatcat:vuztvrsqmveavilqqnduv7xvhi