INVESTIGATION OF CHARACTERISTICS OF SHEAR LAYER: APPLICATION OF SYNTHETIC JET IN BACKWARD-FACING STEP FLOW FIELD
Bibliographic record
Abstract
The purpose of this research is to explore the two-dimensional backward-facing-step flow perturbed by a synthetic-jet actuator experimentally. The step was placed in a low-speed wind tunnel and the flow passage expansion ratio was 1.07. The Reynolds number was Reh = 1.18 × 104 based on the step height and the upstream velocity before the step edge. An electromagnetic loudspeaker was used to generate synthetic jet flows in the direction of the main flow through a slot of 1 mm in width. The peak value of the driven AC voltage was 8 V and the frequency varied in the range of 80–120 Hz. The velocity of the flow field was measured by hot wire anemometers. The distributions of averaged velocity, fluctuation intensity, and Reynolds stress were analyzed to understand the influences of the synthetic jet. The characteristic frequencies were also obtained. The size of the recirculation region was affected by the synthetic jet. The downstream reattached flow was more stable with the synthetic-jet perturbation.
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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".