An Experimental Study of the Unsteady Wake of an Eppler-361 Airfoil
Bibliographic record
Abstract
A number of experimental measurements are carried out to study the unsteady wake of a pitching Eppler-361 airfoil. The flow field in the wake was measured by a hot-wire anemometry at the downstream distance from trailing edge of 0.25 chord. All data were taken at the mean angle of attack of 2.5 deg and the reduced frequency of 0.1. The amplitude of oscillations was varied from 8 to 15 degrees. The variation of instantaneous velocity in one cycle of oscillation for several vertical positions in the wake is investigated. Three different wake structures are found when the airfoil oscillates below the static stall angle. However, when the amplitude of oscillations is 15 deg (i.e., beyond the static stall), the wake structure appears to be the same in all positions. Therefore, it is concluded that the flow undergoes a large separation that covers the most parts of the wake. The effects of amplitude of pitching oscillations on the wake thickness and linear momentum defect are studied.
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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 | 0.001 |
| 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".