Surface pressure and coherent structure evolution on an axially accelerated delta wing
Bibliographic record
Abstract
The flow field, forces, moments, and surface pressure of a NACA 0012 airfoil wing with triangular planform geometry undergoing steady and unsteady translations were measured as a model of a unmanned combat air vehicles encountering unsteady environments. To characterize the evolution of the flow field structures, a Lagrangian flow field analysis including the finite-time Lyapunov exponent (FTLE) was included. Results show that axial acceleration can induce flow reattachment at high angles of attack, and FTLE can indicate the reattachment and its location as it progresses along the wing chord. At such location, the relevant change in surface pressure distribution is also observed in the experimental data, as well as correlated fluctuations in lift, drag, and pitching moment. This augmented understanding of vorticity production, reorientation, and annihilation around and in the wake of complex three-dimensional bodies may provide critical insight for effective flow-control development on vehicles unsteady environments.
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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) | 0.000 | 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".