Characterization of Temperature Sensitive Paint for Application in Hypersonic Ludwieg Tubes at the University of Tennessee
Why this work is in the frame
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Bibliographic record
Abstract
View Video Presentation: https://doi.org/10.2514/6.2022-1660.vid A fast-response temperature sensitive paint has been selected for use in the University of Tennessee Space Institute’s Ludwieg Tubes. The paint is based on a ruthenium complex called ru(phen) which produces fluorescence under ultraviolet excitation that correlates to temperature, with a response time suitable for hypersonic test facilities with sub-second steady state run times. This work presents benchtop characterization of the temperature sensitive paint and initial tests in the Mach 4 Ludwieg Tube. The luminescent intensity of the paint is observed at various surface temperatures produced by contact with heated air flows and compared to control measurements to establish accuracy and repeatability. Highly linear correlation between the luminescent signal and the control measurement is observed, demonstrating that the paint functions with the expected quality as reported in literature. Mach 4 flow experiments are conducted on a painted 6-degree half-angle cone with a cylindrical protruding shock generator, and thermal disturbances are successfully captured.
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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 | 0.001 | 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 it