Linear Burning Rate and Erosivity Properties of Nitrocellulose Propellant Formulations Plasticized by Glycidyl Azide Polymer and Nitroglycerine
Why this work is in the frame
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Bibliographic record
Abstract
Abstract The performance of the extruded cord geometry of nitrocellulose (NC) propellants plasticized by glycidyl azide polymer (GAP) and nitroglycerine (NG) has been evaluated using both closed and erosion vented vessel techniques in order to obtain the linear burning rate and the relative erosivity of these propellants. The closed vessel experiments performed at −46, 21 and 63 °C demonstrate that the measured maximum pressure is in accordance with the calculation obtained using the CHEETAH V2 thermochemical code. From the closed vessel analysis, the linear burning rates show that it is on average 89±3 % that of the 21 °C propellant when fired at −46 °C. and 112±4 % when fired at 63 °C. The addition of either GAP or NG increases the linear burning rate when compared to the neat NC formulation. Relative erosion data obtained in the erosion vented vessel are in agreement with the Arisawa‐Kimura models and it is found that the ratio of CO/CO 2 concentration in combustion gases is a better erosivity indicator than N 2 /CO ratio.
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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