| Autor: |
Nikolas S. Zawodny, D. Douglas Boyd, Douglas M. Nark |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
53rd AIAA Aerospace Sciences Meeting. |
| DOI: |
10.2514/6.2015-0741 |
| Popis: |
Application of previously formulated semi-analytical models for the prediction of broadband noise due to turbulent rotor wake interactions and rotor blade trailing edges is performed on the historical baseline F31/A31 contra-rotating open rotor configuration. Simplified two-dimensional blade element analysis is performed on cambered NACA 4-digit airfoil profiles, which are meant to serve as substitutes for the actual rotor blade sectional geometries. Rotor in-flow effects such as induced axial and tangential velocities are incorporated into the noise prediction models based on supporting computational fluid dynamics (CFD) results and simplified in-flow velocity models. Emphasis is placed on the development of simplified rotor in-flow models for the purpose of performing accurate noise predictions independent of CFD information. The broadband predictions are found to compare favorably with experimental acoustic results. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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