Resolvent analysis of separated flow around a NACA0012 airfoil: Reynolds number effects
ORAL
Abstract
Resolvent analysis provides great insights for understanding flow unsteadiness and designing flow control techniques. In this study, we employ bi-global resolvent analysis to investigate the effects of Reynolds numbers from Re=600 to 23000 on separated flow over a NACA0012 airfoil. The base flow is obtained by direct numerical simulations and wall resolved large eddy simulations with averaging performed in time and the spanwise direction. Particular emphasis is placed on uncovering the influence of the Reynolds number on the response and forcing modes as well as the energy gain associated with different frequencies and spanwise wavelengths. Comparisons are made between the results from resolvent analysis and the unsteady flow characteristics extracted from the numerical simulations. We will also discuss our efforts on studying Reynolds number effects for three-dimensional flows around finite wing with triglobal resolvent analysis.
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Presenters
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Victoria Rolandi
University of California Los Angeles, University of California, Los Angeles
Authors
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Victoria Rolandi
University of California Los Angeles, University of California, Los Angeles
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Luke Smith
UCLA, University of California, Los Angeles
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Kunihiko Taira
UCLA, University of California, Los Angeles