Jet noise prediction using a fully unstructured large eddy simulation solver
Bibliographic record
Abstract
The grid is fully unstructured using only tetrahedral elements. Maximum cell sizes in the acoustic source area, namely the mixing layer and the transition region, allow capturing frequencies at least up to a Strouhal number (Sir) of 1.5. A finer meshing is done in the nozzle boundary layer in order to allow a natural transition to turbulence of the mixing layer at the nozzle exit. Acoustic sources data are collected on surfaces at about 1.5D from the jet in order to avoid dispersion and dissipation effects and limit the grid size. Acoustic prediction is then performed using the permeable surface formulation of the Ffowcs-Williams and Hawkings analogy implemented in the MCAAP code. Both aerodynamic and aeroacoustic results obtained on cold jets with and without nozzle geometry show good agreement with experiments.
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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".