Aeroacoustic Prediction of the Tonal Noise Radiated by a Ring Fan in Uniform Inlet Flow
Bibliographic record
Abstract
Aeroacoustic simulation of a ring rotor in presence of a uniform inlet ow is presented. An unsteady RANS simulation with a compressible solver is used to compute the ow eld and identify the acoustic sources on the rotor. The tip clearance recirculation shows upstream vortices that appear to impact the rotor blades creating the main source of unsteadiness. Since those vortices rotate at a lower speed than the rotor, the impact frequency implied is shown to be di erent than the blade passing frequency. Besides the aerodynamic simulation, the acoustic signature of this rotor is computed by propagating the noise sources located on the rotor surfaces using two methods: a Ffowcs-Williams & Hawkings analogy in the time-domain, as well as an analytical model in the frequencydomain based on the compact rotating dipole formulation. A comparison with experimental results con rms the aeroacoustic phenomena are well captured and properly propagated by the acoustic codes.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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".