Oblique viscous–inviscid free interaction on the lee-side of an inclined slab delta in hypersonic flow
Bibliographic record
Abstract
Near wakes and cross-flow separation in hypersonic flows have important implications for the effective design and engineering of next-generation flight vehicles, reentry capsules, and propulsion systems. The present work utilizes numerical simulations of a Mach 10 slab delta at a moderate angle of attack in adiabatic, cold wall, and slip wall flow in order to reconcile the cross-flow vortex formation with free-interaction processes observed on primitive shapes and capsules. Validation of the simulation methodology is performed by comparing with experimental data from the literature for pressure and Stanton number distributions. First, the work shows that a boundary layer separation is not required to form a cross-flow recirculation flow pattern. This indicates that the flow reversal leading to the rotating flow is related to gasdynamic phenomena, rather than being a result of boundary layer separation alone. Subsequently, simulation results are used to examine the mechanisms of viscous–inviscid interaction leading to separation. The work demonstrates that despite substantially changing pressure and local skin friction along the delta wing, the separation process obeys a nearly self-similar free-interaction process over a large portion of the body. A free-interaction parameter modified to account for the momentum balance in the direction of the leading edge is presented and demonstrates the predictability of this interaction at various stations along the delta. These results and observations demonstrate that past work on near-wake free interactions is more general than previously shown and confirms and builds on early work in the literature.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".