Large-Eddy Simulation of a Linear Compressor Cascade with Tip Flow: Effects of the Moving Endwall on the Aerodynamics
Bibliographic record
Abstract
A wall-resolved compressible Large-Eddy Simulation of a linear compressor cascade with a moving end-wall has been performed with the high-order unstructured solver AVBP in order to study the effects of the wall motion on the tip-leakage flow aerodynamics. The cascade is composed of eight controlled diffusion airfoils with a tip-gap of 1.6% chord and a pitch-to-chord ratio of 0.925. The inflow Mach number is 0.07 and the Reynolds number based on the chord is 3:88 106. The moving end-wall moves in the pitchwise direction with a velocity magnitude that is 90.8% of the freestream inflow velocity. The main fluid-dynamic structures as the Tip-Leakage Vortex (TLV) and the wake have been resolved. Finally, a comparison between the current case and a previous simulation with a stationary end-wall has been done in order to investigate the effects of the wall motion in details. The TLV is flattened and entrained by the wall motion, resulting in a modified trajectory of the vortex. Moreover, this is characterized by lower turbulent kinetic energy. The aerodynamic comparison between the two cases sets the stage for a consistent aeroacoustic analysis.
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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".