| Autor: |
Lutz Taubert, Israel Wygnanski, Nathaniel J. Lucas, Michael A. McVeigh, Rene Woszidlo |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
4th Flow Control Conference. |
| Popis: |
Experiments aimed at delaying flow separation through discrete jets pointing in the direction of streaming and sweeping side-to-side along the span were conducted on two airfoils, a NACA0015 and a V-22 airfoil with and without deflected trailing edge flaps. The results indicated substantial drag reduction and lift increase at moderately low inputs of mass and momentum. Additional experiments were carried out on a semi-span V-22 wingnacelle combination and they too provided an increase in L/D of approximately 60%, even with the presence of nacelle drag and induced drag. The effectiveness of the sweeping jets on reducing the download force acting on a V-22 powered model in hover was also examined. A 29% reduction in download was realized using the embedded sweeping jets. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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