Control of Fluid-Structure-Sound Interaction Mechanisms by Means of Synthetic Jets
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Bibliographic record
Abstract
The effectiveness of feedback control technique in suppressing flow-excited oscillations is illustrated by considering several examples of fluid-structure-sound interaction mechanisms. These include impinging flow oscillations, flow-excited acoustic resonance, vortex-induced lock-in vibration and turbulent buffeting vibration. The control actuator in all examples consists of a synthetic jet issuing from a narrow slit positioned at the location of flow separation. The synthetic jet is generated by loudspeakers, which are activated by the signal of a sensor monitoring the system response. Different types of controllers are used to properly adjust the phase and the gain of the speaker signal with respect to those of system response. Different sensors are also employed to investigate the effect of sensor type on the control performance. The developed technique proved to be very effective; reducing the oscillation amplitudes by amounts reaching 35dB.
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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 it