| Autor: |
Jeffrey P. Slotnick, Anthony J. Sclafani, John C. Vassberg, Thomas H. Pulliam |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
30th AIAA Applied Aerodynamics Conference. |
| DOI: |
10.2514/6.2012-2919 |
| Popis: |
The OVERFLOW computational fluid dynamics code is used to simulate a high lift flow field about the NASA Trap Wing wind tunnel model with the goal of better understanding bracket and boundary layer transition effects on prediction of aerodynamic loads. This study is a continuation of the 1 AIAA CFD High Lift Prediction Workshop analysis. Following a set of lessons learned from the workshop, improvements in grid and flow solver inputs are first implemented to establish a new baseline dataset for a bracket-off configuration analyzed with a fully turbulent boundary layer. Brackets are added to the grid system and regions of laminar flow are modeled using two approaches: 1) Spalart-Allmaras (SA) turbulence model coupled with fixed transition and 2) Shear Stress Transport (SST) turbulence model coupled with the Langtry-Menter -Re transition model. The findings suggest that the effects of brackets and transition on computed lift are nearly equal in magnitude and opposite in sign up to an angle-of-attack of 21. Comparisons with experiment are made using results from the LaRC 14x22 wind tunnel test including velocity probe data. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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