3D Density Field Measurements of Underexpanded Microjets from Rectangular Laval Nozzles by Twyman-Green Interferometers
Bibliographic record
Abstract
The free jet issued from a Laval nozzle of a design Mack number 1.5 with a square area of 1 mm2 at the exit is experimentally investigated to observe the flow characteristics of shock-containing microjets in which a Twyman-Green interferometer with a blue semiconductor laser is used and the reconstruction of the jet three-dimensional density field is performed by the convolution back-projection algorithm. It is found that the fine structure of the shock-containing microjet is quantitatively represented with the density contour plot at the streamwise cross-section including the jet centerline and the two-dimensional density field at the cross-section vertical with respect to the jet centerline just downstream of the nozzle exit shows the axis-switching phenomenon.
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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".