Flow Direction Control using Circular Cylinder with Multi-slotted Tangential Blowing
Bibliographic record
Abstract
Jet technologies are sometimes used for boundary layer control, including the stall control of wings [1].Studies been conducted on circulation control wings (CCW), which utilize jet sheets to generate more lift [2].A CCW generates a high lift by blowing out jet sheets tangentially from slots on the negative-pressure side of the wing and increasing the circulation around the wing by utilizing the Coanda effect on the curved surface of the wing.The simplest form of a CCW is a circular cylinder with tangential blowing, and the lift can be controlled without changing the geometry by adjusting the momentum of the jet sheet [3].However, as most studies have focused primarily on the lift force characteristics, the knowledge necessary to apply circular cylinders with tangential blowing to the directional control of the already existing flow, such as in ductless ventilation, is lacking [4].In particular, the effect of the number of slots on the deflection characteristics of the flow remains largely unexplored [5].In this study, two types of circular cylinders with tangential blowing single-slot and double-slot were used to control the direction of the main jet, and their fundamental flow characteristics were elucidated.The double-slot type is expected to exhibit a self-cooling function similar to that of film cooling.The effects of the momentum coefficient C, the slot installation angle j, and the eccentricity of the columns with respect to the main jet on the jet deflection characteristics were mainly discussed through flow visualization and velocity measurements.The Reynolds number in this experiment was constant at 2.710 4 .The main results were that the deflection characteristics of the main jet applying the single-or double-slot types are different for identical momentum coefficients C.The jet deflection characteristics do not depend significantly on the eccentricity of the installed cylinder in the single-slot case, whereas in the double-slot case, the flow characteristics differ significantly depending on the eccentricity of the installed cylinder .
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How this classification was reachedexpand
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 | 0.000 |
| 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 teacher head, 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".