Spanwise Characteristics of High Aspect Ratio Synthetic Jets
Bibliographic record
Abstract
The spanwise characteristics, that is, the two dimensionality of two high-aspect-ratio, planar synthetic jets are investigated experimentally to evaluate their use as actuators for active flow control applications. The two jets, with different slit lengths, are generated through narrow axial slits on a cylinder by acoustical excitation at the cylinder terminations. Measurements of the mean and fluctuating velocities, as well as the phase of velocity fluctuations with respect to the excitation signal, are performed to study the effect of excitation frequency and amplitude on the steady and unsteady spanwise characteristics of the generated synthetic jet. The jet issuing from the long slit is found to exhibit large variations in the spanwise direction, in both its mean velocity and phase. These variations are also dependent on the level and frequency of acoustic excitation. For the short slit, the spanwise variations are substantially smaller. The test results indicate that the short slit is a favorable actuator for active control applications involving the generation of a planar synthetic jet with small spanwise variations. The long slit, however, may be useful for active control applications that require the inducement of large phase variations along the slit.
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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".