Simulation Study on Atomization Process of Pulsed Anti-riots Water Cannon with Laval Nozzle
Bibliographic record
Abstract
In this paper,we study the anti-riots water cannon optimal control problem.The high-pressure gas is as the driving force of anti-riots water cannon.Jet nozzle is the emission element of anti-riots water cannon.The laval nozzle are designed according to the jet structure of the police pulsed anti-riots water cannon.Coupling the VOF with LES model,we build the mathematic model and physical model of the nozzle,and use the OpenFOAM software to emulation the area near the nozzle.Through the research it was found that the laval nozzle can achieve good result on atomization effect and cannon-shot.At the same time,through the simulation and analysis of the area near laval nozzle from the sides of atomization form and angle,distribution of velocity.We established that field angle between 15° and 18° is more reasonable,as providing a reference for farther optimize of pulsed water cannon.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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 source (direct Gemma or distilled Codex), 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".