| Link | http://www.icas.org/ICAS_ARCHIVE/ICAS2012/PAPERS/159.PDF |
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| Author | Search for: Yuan, Weixing1; Search for: Wang, Baoyuan1; Search for: Poirel, Dominique |
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| Affiliation | - National Research Council of Canada. Aerospace
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| Format | Text, Article |
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| Conference | 28th Congress of the International Council of the Aeronautical Sciences 2012, ICAS 2012, September 23-28, 2012, Brisbane, Australia |
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| Subject | Aeroelastic 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 |
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| Abstract | By 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. |
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| Publication date | 2012 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21269999 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 207612ae-1b08-4e23-956e-e4ee8a6386a7 |
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| Record created | 2013-12-13 |
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| Record modified | 2020-04-21 |
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