Abstract
Proper Orthogonal Decomposition (POD) and Dynamic Mode Decomposition (DMD) are applied to the unsteady separated flow field over a NACA-0015 airfoil with periodic zero-net-mass-flux (ZNMF) jet forcing at the leading edge at an angle of attack \(\alpha = 18^\mathrm{{o}}\) and chord based Reynolds number of \(\mathrm{{Re}}= 3\times 10^4\). This study presents experimental data for the forced flow case and recovers the dominant coherent structures and temporal characteristics that describe the evolution of the velocity perturbation. The dominant frequencies are identified by the DMD eigenvalues and the corresponding spatial modes are compared to the dominant POD modes.
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References
Buchmann NA, Atkinson C, Soria J (2013) Influence of ZNMF jet flow control on the spatio-temporal flow structure over a NACA-0015 airfoil. Exp Fluids 54:1485
Greenblatt D, Wygnanski IJ (2000) The control of flow separation by periodic excitation. Prog Aerosp Sci 36:487–545
Hasselmann K (1988) PIPs and POPs: The reduction of complex dynamical systems using principle interaction and oscillating patterns. J Geophys Res 93(D9):11015–11021
Kitsios V, Cordier L, Bonnet J-P, Ooi A, Soria J (2011) On the coherent structures and stability properties of a leading-edge separated aerofoil with turbulent recirculation. J Fluid Mech 683:395–416
Kostas J, Soria J, Chong MS (2005) A comparison between snapshot pod analysis of piv velocity and vorticity data. Exp Fluids 38:146–160
Seifert A, Greenblatt D, Wygnanski IJ (2004) Active separation control: an overview of Reynolds and Mach numbers effects. Aerosp Sci Technol 8:569–582
Tuck A, Soria J (2008) Separation control on a NACA 0015 airfoil using a 2D micro ZNMF jet. Aircr Eng Aerosp Technol 80(2):175–180
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Buchmann, N.A., Kitsios, V., Atkinson, C., Soria, J. (2015). Investigation of Coherent Structures and Dynamics Using POD and DMD of a Separated Airfoil Subjected to ZNMF Jet Forcing. In: Theofilis, V., Soria, J. (eds) Instability and Control of Massively Separated Flows. Fluid Mechanics and Its Applications, vol 107. Springer, Cham. https://doi.org/10.1007/978-3-319-06260-0_4
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DOI: https://doi.org/10.1007/978-3-319-06260-0_4
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