Cars and sample probe measurementsin two pilot-scale natural gas flames
Why this work is in the frame
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Bibliographic record
Abstract
The design of a reliable low-NO x burner requires a good understanding of the mixing between the fuel and air jets. This is true both for technologies using staging of the combustion air and for those using exhaust gas recirculation. Therefore, there is a need for detailed measurements in the near-burner region to validate the theories on which the burner technology is based and to better understand the processes involved in this region of the furnace. This article presents intrusive measurements of conventional combustion products (O 2 , CO 2 , CO, and NO x ) and mean and fluctuating components of temperature using a laser-based measurement system (CARS) in two natural gas flames produced by two commercially available burners. Based on these measurements, the burners are compared with respect to combustion performance. The low-NO x burner produced similar amounts of NO x compared to the other burner. The reason for this is found in the differences in the fluctuating component of gas temperature in the flames from these burners. The low-NO x burner is shown to have broad temperature profiles resulting in much larger regions where the temperature is above the 1800 K limit for NO x formation compared to the high-NO x burner.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| 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