Design and Fabrication of Submillimeter Supersonic Wind Tunnels for Pressure Measurements
Bibliographic record
Abstract
A de Laval supersonic nozzle with a test section was designed as a microsupersonic wind tunnel and subjected to numerical and experimental analysis. The height and depth of the throat of the nozzle were 500 and 150 μm, respectively. A plenum chamber was added to the inlet of the supersonic nozzle and a reservoir was connected to the outlet of the test section to ensure a steady pressure condition during experiments. The microsupersonic wind tunnel was fabricated through microelectromechanical lithography, and a pressure-sensitive paint (PSP) was applied to acquire the pressure contours inside the microsupersonic wind tunnel at various pressure conditions. A divergent angle of 4 deg was added to the test section to resolve the viscous layer growing from the side walls and to ensure a steady flow during the measurements. A flow speed of Mach 1.6 was achieved with inlet and outlet pressures of 100 and 20 kPa, respectively. A circular cylinder model with a diameter of 50 μm was positioned at the exit of the test section to examine the flowfield. Because of the viscous effect, the shock wave cannot be identified but local high- and low-pressure regions could still be observed through PSP measurements.
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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 | 0.001 | 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".