Study on the phase transition of high-speed natural gas flow in a nozzle by numerical method
Bibliographic record
Abstract
Supersonic swirling natural gas separation is a revolution in natural gas processing technology compared with traditional low-temperature separation technology.In the supersonic swirling separator,the supersonic low-temperature stream with small liquid droplets is formed when the natural gas passes through Laval nozzle and does adiabatic expansion.The phase transition in the nozzle is the key to the separation of natural gas.Based on the theory of phase transition,gas dynamics and the state equation of real gas,the mathematical model of high-speed natural gas flow with phase transition in Laval nozzle is established and the flow characteristics of the natural gas flow are investigated.The starting points of the phase transition and the mass ratio of condensed water to vapor at the outlet of the nozzle are calculated under different inlet conditions;the relations between the starting points of the phase transition and the mass ratio of condensed water to vapor and inlet pressure at constant inlet temperature are also analyzed.The results indicate that,the starting points of the phase transition move forward and the mass ratio of condensed water to vapor increases with the increase of the inlet pressure.The factors of influencing the normal operation of the separator are discussed and a method for predicting the normal operating pressure range of the supersonic swirling natural gas separator is established.
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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 | 0.000 | 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 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".