Further Developments to a Local Correlation Based Roughness Model for Boundary Layer Transition Prediction Article Swipe
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· 2015
· Open Access
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· DOI: https://doi.org/10.2514/6.2015-1232
A study has been conducted to improve the correlations within a computational roughness amplification model implemented in the unsteady RANS solver OVERFLOW-2. The model extends the Langtry-Menter transition model by introducing an additional scalar field roughness amplification quantity, Ar. This additional variable and transport equation allows non-local effects of surface roughness to be accounted for downstream of rough sections. Initially the model was not equipped to account for the influence of a strong local pressure gradient and experiments have shown discrepancies compared to predictions from the model. Accordingly, the model has been reformulated to include the effects of localized pressure gradients. Additionally included are suggestions for accounting for changes in roughness density. With the equations governing the roughness model recast, the model has been calibrated using the results from the companion experimental study performed at Texas A&M University. An overview of the experimental campaign is provided along with results of the roughness amplification model applied to the configurations tested.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.2514/6.2015-1232
- OA Status
- green
- Cited By
- 13
- References
- 39
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W2322609245