Force and Moment Measurements on a Generic Finned Missile with Nose-Mounted Micro-Structures
Bibliographic record
Abstract
A multi-disciplinary project was undertaken at DRDC Valcartier with the objective of developing a control actuation system that could be embedded in the structure of a missile to provide measurable control authority through boundary layer and vortex manipulation. The ultimate goal of the project being to improve the strike accuracy of maneuvering munitions using alternative aerodynamic control methodologies. Using nose-mounted micro-∞ow efiectors, it was shown experimentally and computationally in earlier publications by the authors that signiflcant side force could be generated at moderate angles-of-attack and for supersonic ∞ow on a flnless generic missile conflguration. These results proved very useful in better understanding the nature of the problem and in explaining the ∞ow physics associated with the phenomena. However, the ultimate objective of this project is to demonstrate the use of micro-structures as a means to enhance the yaw control of missile. Thus, a study was performed on a realistic missile conflguration having four flns mounted in a cruciform conflguration. As part of this new phase for the project, additional wind tunnel force measurements were carried out on a flnned cone cylinder having an aspect ratio of 13 and a diameter of 30mm. The aim of this study was to evaluate the relative importance of the aerodynamic forces generated through vortex manipulation using square-edged rectangular micro-∞ow efiectors mounted at distance of 0.84 caliber from the nose tip with respect to those generated by conventional control surfaces. The results show that the efiect of the various ∞ow efiector conflgurations on the generated side force is similar to what was observed for the flnless missile conflguration. However, the relative importance of the side force generated in relation to the normal force is reduced as expected due to the presence of the flns.
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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 | 0.002 | 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 | 0.000 |
| 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".