Experimental investigation of two-phase flow development through two-stage orifices
Why this work is in the frame
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Bibliographic record
Abstract
In this study, the effect of flow development length on two-stage flow orifices at an intermittent flow condition was investigated. Experiments were carried out for two-stage orifices with area ratio of 0.25–0.14 and with 1, 3, and 5D spacing between orifices. Also, experiments were carried out on single-stage orifices of the same area ratios under the same inlet flow conditions. The data suggested that restricting the flow in stages, with the smaller area of the restriction in the final stage, reduced the flow separation, enhance the mixing and improve flow development downstream as the spacing increased. Also, the total pressure drop of the two-stage orifice found to decrease as the spacing decreased especially at low gas superficial velocity. Finally, a new approach to correlate the total pressure drop was proposed and successfully implemented in order to determine the pressure drop multiplier of two-stage orifice with varying spacing.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 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