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Experimental Study on Effect of Wavelength and Amplitude of Wavy Ground on a NACA 0012 Airfoil

2019· article· en· W2947008718 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueJournal of Aerospace Engineering · 2019
Typearticle
Languageen
FieldEngineering
TopicAerodynamics and Fluid Dynamics Research
Canadian institutionsMcGill University
Fundersnot available
KeywordsAirfoilPitching momentNACA airfoilAerodynamic centerLift (data mining)AmplitudeMechanicsGround effect (cars)Lift-to-drag ratioWavelengthLift coefficientPhysicsAerodynamicsReynolds numberDragLift-induced dragAngle of attackOpticsComputer scienceThermodynamics

Abstract

fetched live from OpenAlex

The effect of wavelength and amplitude of a sinusoidal wavy ground on the aerodynamics and flowfield of a NACA 0012 airfoil at low Reynolds numbers was investigated experimentally. The results show that, regardless of wave length and amplitude, the periodic variation in the sectional lift and pitching moment persisted, and that the smaller wavy ground distance the larger lift and pitching moment became. The pitching moment also had an opposite trend to the lift. The maximum and minimum lift always occurred at wave peak and valley, respectively. The maximum and minimum lift and pitching moment increased drastically with increasing wave amplitude while depended weakly on the wave length. However, the change in the drag force over the wavy ground was found to be nonmonotonic.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.537
Threshold uncertainty score0.796

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.006
GPT teacher head0.241
Teacher spread0.235 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it