Effects of End Plates and Blockage on a Low Reynolds Number Airfoil Experiment
Bibliographic record
Abstract
The e ects of end plates and blockage on low Reynolds number airfoil experiments are explored through measurements on a NACA 0018 airfoil model at a chord Reynolds number of 100,000. Consistent with previous studies on the use of end plates on circular cylinder models, it is found that end plates signi cantly improve the mean spanwise uniformity of the ow and that mean quantities measured on the center-span plane are least sensitive to end plate spacing for spacings greater than roughly seven times the projected model height. It is shown that the end plate con guration a ects vortex shedding characteristics and disturbance ampli cation in the separated shear layer. Blockage e ects are investigated by comparing measurements before and after adaptive-wall test section streamlining for solid blockage ratios of between 4 and 8%. The results reveal errors in lift coe cients due to blockage as high as 9% of the maximum lift coe cient and 3.5% error in the wake vortex shedding frequency.
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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".