Numerical Investigation of Wall Mounting Effects in Semi-Span Wind-Tunnel Tests
Bibliographic record
Abstract
In this paper, the effects of installing an aircraft half-model on a sidewall of a wind tunnel are investigated. Three-dimensional RANS computations are performed on a geometry representative of an actual modern widebody airliner. The influence of a non-metric spacer, introduced between the half-model and the sidewall, is studied. The study focuses on the effects of the spacer presence on the lift coefficient and the pressure distribution around the model. Computational results show a significant change of the flow field in the case of the half-span installation compared to the full-span case. Unlike several previous investigations showing that the lift usually increases with increasing spacer height, the present study shows that the influence of the spacer is strongly dependent on the Mach number and the angle of attack. It is also found that changing the spacer height may have positive impact on the correlation between semi-span and full-span results for the lift coefficient at specific Mach numbers and angles of attack, while also negatively affecting the correlations of the same coefficient for other flow conditions.
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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 | 0.001 | 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 | 0.000 |
| 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".