Ice crystal trajectory simulations in the ICE-MACR compressor rig: fragmentation and melting dynamics
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Bibliographic record
Abstract
View Video Presentation: https://doi.org/10.2514/6.2022-3535.vid The current work deals with the numerical simulation of ice crystal trajectories within an experimental single stage compressor test rig. First, ice crystal trajectories and the associated fragmentation dynamics within the compressor stage are investigated for different rotor speeds. To this purpose, numerical simulations with two different fragmentation models are compared for cold conditions, i.e. with a sufficiently negative wet bulb temperature to totally inhibit melting. The comparison between the fragmentation models aims at assessing the capabilities of a recently proposed ice crystal fragmentation model with respect to a state of the art model. Both models show good agreement with experimental size distribution data as they reproduce the size reduction of the ice crystals with increasing rotational speed. In a second step, three experimental operating points with wet bulb temperatures raising from negative to positive values and respectively exhibiting no, significant and moderate melting, are simulated. Here, the comparison of numerical and experimental results highlights the strong sensitivity of the ice particles' melt ratio to inlet temperature variations, even by a few degrees.
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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