Numerical simulations of self-sustained aeroelastic oscillations at low Reynolds numbers

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TypeArticle
Proceedings title28th Congress of the International Council of the Aeronautical Sciences 2012 (ICAS 2012)
Conference28th Congress of the International Council of the Aeronautical Sciences 2012, ICAS 2012, September 23-28, 2012, Brisbane, Australia
ISBN9781622767540
Volume1
Pages816825; # of pages: 10
SubjectAeroelastic oscillations; Degree of freedom; Limit cycle oscillations; Low Reynolds number; Low-Reaerodynamics; Self-sustained oscillations; Structural models; Two-degree-of-freedom; Aerodynamics; Airfoils; Computer simulation; Model structures; Reynolds number; Aeroelasticity
AbstractBy coupling a two-degree-of-freedom structural model with an in-house incompressible code, numerical simulations were performed for a NACA 0012 airfoil undergoing self-sustained oscillations. As observed in experiments, the numerical simulations confirmed the presence of the pitch-heave limit-cycle oscillations of the airfoil at transitional Reynolds numbers, as a result of the nonlinear low-Re aerodynamics. The computed results revealed that the pitch motion of the pitch-heave limit-cycle oscillations at Rec < 80,000 was mainly maintained by the pitching moment feeding energy from the flow to the airfoil, while the pitch motion is believed to be sustained through the coupling with the second degree of freedom in heave at Rec > 80,000. Both pitch and heave motions were bounded by the pitching moment at ultimate pitch angles to a limit-cycle oscillation.
Publication date
PublisherCurran Associates, Inc.
Linkhttp://www.icas.org/ICAS_ARCHIVE/ICAS2012/PAPERS/159.PDF
LanguageEnglish
AffiliationAerospace; National Research Council Canada
Peer reviewedYes
NPARC number21269999
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Record identifier207612ae-1b08-4e23-956e-e4ee8a6386a7
Record created2013-12-13
Record modified2016-05-09
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