| Autor: |
Hamid Johari, Charles Henoch, Derrick Custodio |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. |
| DOI: |
10.2514/6.2012-54 |
| Popis: |
A series of water-tunnel experiments were conducted to determine the effect of sinusoidal leading-edge protuberances on the aerodynamic characteristics of finite span wings. The models consisted of seven rectangular planform wings, two swept-leading-edge wings, and two wings with a planform resembling humpback-whale flippers. All models had an underlying NACA 634-021 profile with protuberance amplitudes of 0.025–0.12 times the chord length. The models were examined at Reynolds numbers up to 4.5×105 and angles of attack up to 30 deg. The lift and drag coefficients were nearly independent of Reynolds numbers above 3.6×105. Specific rectangular-planform models had appreciably greater lift coefficients over a limited angle-of-attack range when compared to the baseline model. However, with the exception of the planform that resembled the humpback-whale flipper, the lift-to-drag ratio of all leading-edge modified models was comparable to or less than the equivalent baseline model. The flipper model had a slight... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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