Unsteady aerodynamic performance of an airfoil with serpentine DBD plasma actuator
Bibliographic record
Abstract
Abstract This study experimentally investigates the effects of an optimized circular serpentine dielectric barrier discharge (DBD) plasma actuator on the unsteady aerodynamic performance of a NACA0012 airfoil. Wind-tunnel tests are conducted at low subsonic velocities, with Reynolds numbers ranging from 61 × 103–175 × 103. These tests include surface pressure measurements and velocity data collection using a hot-wire anemometer in the wake region. The study examines the influence of Reynolds number, pitching frequency, pitching amplitude, reduced frequency, and plasma actuation on dynamic stall behavior and flow reattachment. Results indicate that the serpentine DBD plasma actuator effectively delays dynamic stall by up to 2° by injecting 3D vortices into the near-wall flow. This energizes the boundary layer and stabilizes unsteady structures, leading to significant aerodynamic improvements. These include an increase of up to 11.5% in the maximum lift coefficient at Re = 131 × 103 and f = 1.5 Hz, as well as lift enhancements of up to 30.2% during the upstroke and 57% during the downstroke. Additionally, velocity measurements show that the plasma actuator delays and suppresses flow separation while enhancing reattachment.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 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) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".