Effect of Laval tube structure on performance of yarn suction gun for FDY
Why this work is in the frame
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Bibliographic record
Abstract
To elucidate the effect of Laval tube structure on the performance of yarn suction gun for FDY,the throat diameter and throat length of the Laval tube are determined by theoretical analysis of the fluid field of the yarn suction gun. By changing the converging angle of Laval tube α and the diverging angle of Laval tube β,yarn suction force F and mass flow rate of compressed air G of the yarn suction gun are measured,and the effects of α and β on the yarn suction efficiency η( η = F / G) are analyzed. The optimal Laval tube is the one with geometrical parameters of α = 90° and β = 6°. η can be raised through a rational α,with which the converging part of Laval tube accelerates airflow and makes the airflow develop into a strong swirling flow. A rational β contributes to not only acceleration of super-sonic swirling airflow in the diverging part of Laval tube but also low running resistance of air and yarn,thus enhances η. However,an over-large β results in a low η because it causes normal shock wave to occur early,which stops the air acceleration and leads to a great loss of kinetic energy.
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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 | 0.002 | 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 | 0.001 |
| 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