| Autor: |
Beerinder Singh, Manikandan Ramasamy, Inderjit Chopra, J. Gordon Leishman |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. |
| DOI: |
10.2514/6.2005-2293 |
| Popis: |
Results were obtained for several high frequency tests conducted on biomimetic, flapping-pitching wings. The wing mass was found to have a significant influence on the maximum frequency of the mechanism because of a high inertial power requirement. All the wings tested showed a decrease in thrust at high frequencies. In contrast, for a wing held at 90◦ pitch angle, flapping in a horizontal stroke plane with passive pitching caused by aerodynamic and inertial forces, the thrust was found to be larger. To study the effect of passive pitching, the biomimetic flapping mechanism was modified with a passive torsion spring on the flapping shaft. Results of some tests conducted with different wings and different torsion spring stiffnesses are shown. A soft torsion spring led to a greater range of pitch variation and produced more thrust at slightly lower power than with the stiff torsion spring. Some flow visualization images have also been obtained using the passive pitching wings. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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