Numerical simulations of self-sustained aeroelastic oscillations at low Reynolds numbers
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Bibliographic record
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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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.009 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it