Abstract
The three-dimensional structure of the reattached flow caused by synthetic jet actuation on an airfoil was investigated using surface flow visualization. Without active control, the flow was stalled with laminar boundary layer separation occurring near the leading edge. Tuft and oil visualization showed the shape and spanwise extent of the attached flow due to a finite span synthetic jet where the effect of excitation frequency and blowing ratio was the focus. For all excitation frequencies tested, a similar contraction of the spanwise extent of the attached flow towards the trailing edge was observed due to edge effects of the finite span jet. Increasing the blowing ratio was found to decrease the amount by which the attached flow contracted.
Graphical abstract
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Amitay M, Smith DR, Kibens V, Parekh DE, Glezer A (2001) Aerodynamic flow control over an unconventional airfoil using synthetic jet actuators. AIAA J 39(3):361–370
Boutilier MS, Yarusevych S (2012) Effects of end plates and blockage on low-Reynolds-number flows over airfoils. AIAA J 50(7):1547–1559
Buchmann N, Atkinson C, Soria J (2013) Influence of ZNMF jet flow control on the spatio-temporal flow structure over a NACA-0015 airfoil. Exp Fluids 54(3):1–14
Feero MA, Goodfellow SD, Lavoie P, Sullivan PE (2015) Flow reattachment using synthetic jet actuation on a low-Reynolds-number airfoil. AIAA J 53(7):2005–2014
Glezer A, Amitay M, Honohan AM (2005) Aspects of low- and high-frequency actuation for aerodynamic flow control. AIAA J 43(7):1501–1511
Goodfellow SD, Yarusevych S, Sullivan PE (2013) Momentum coefficient as a parameter for aerodynamic flow control with synthetic jets. AIAA J 51:623–631
Greenblatt D (2007) Dual location separation control on a semispan wing. AIAA J 45(8):1848–1860
Greenblatt D, Wygnanski IJ (2000) The control of flow separation by periodic excitation. Progr Aerosp Sci 36(7):487–545
Lissaman PBS (1983) Low-Reynolds-number airfoils. Ann Rev Fluid Mech 15:223–239
O’Meara M, Mueller T (1987) Laminar separation bubble characteristics on an airfoil at low Reynolds numbers. AIAA J 25(8):1033–1041
Packard NO, Thake MP Jr, Bonilla CH, Gompertz K, Bons JP (2013) Active control of flow separation on a laminar airfoil. AIAA J 51(5):1032–1041
Sahni O, Wood J, Jansen KE, Amitay M (2011) Three-dimensional interactions between a finite-span synthetic jet and a crossflow. J Fluid Mech 671:254–287
Sefcovic JA, Smith DR (2010) Proportional aerodynamic control of a swept divergent trailing edge wing using synthetic jets. In: 48th AIAA aerospace sciences meeting including the New Horizons Forum and Aerospace Exposition, p 92
Smith BL, Glezer A (1998) The formation and evolution of synthetic jets. Phys Fluids 10:2281
Troshin V, Seifert A (2013) Performance recovery of a thick turbulent airfoil using a distributed closed-loop flow control system. Exp Fluids 54(1):1–19
Acknowledgments
The authors graciously acknowledge financial support from the Natural Sciences and Engineering Research Council of Canada.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Feero, M.A., Lavoie, P. & Sullivan, P.E. Three-dimensional span effects of high-aspect ratio synthetic jet forcing for separation control on a low Reynolds number airfoil. J Vis 20, 45–51 (2017). https://doi.org/10.1007/s12650-016-0365-7
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12650-016-0365-7