Dynamic interference of two anti-phase flapping foils in side-by-side arrangement in an incompressible flow
| العنوان: | Dynamic interference of two anti-phase flapping foils in side-by-side arrangement in an incompressible flow |
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| المؤلفون: | Z. L. Sun, H. L. Tong, J. J. Tao, Yan Bao, H. B. Zhu, D. Zhou, Zhangli Peng |
| المصدر: | Physics of Fluids. 29:033601 |
| بيانات النشر: | AIP Publishing, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Fluid Flow and Transfer Processes, Physics, Leading edge, Mechanical Engineering, Computational Mechanics, Mechanics, Wake, Condensed Matter Physics, 01 natural sciences, Kármán vortex street, 010305 fluids & plasmas, Vortex, 010101 applied mathematics, symbols.namesake, Mechanics of Materials, Drag, Incompressible flow, 0103 physical sciences, symbols, Flapping, Strouhal number, 0101 mathematics |
| الوصف: | A two-dimensional computational hydrodynamic model is developed to investigate the propulsive performance of a flapping foil system in viscous incompressible flows, which consists of two anti-phase flapping foils in side-by-side arrangement. In the simulations, the gap between the two foils is varied from 1.0 to 4.0 times of the diameter of the semi-circular leading edge; the amplitude-based Strouhal number is changed from 0.06 to 0.55. The simulations therefore cover the flow regimes from negligible to strong interference in the wake flow. The generations of drag and thrust are investigated as well. The numerical results reveal that the counter-phase flapping motion significantly changes the hydrodynamic force generation and associated propulsive wake. Furthermore, the wake interference becomes important for the case with a smaller foil-foil gap and induces the inverted Benard von Karman vortex streets. The results show that the hydrodynamic performance of two anti-phase flapping foils can be significantly different from an isolated pitching foil. Findings of this study are expected to provide new insight for developing hydrodynamic propulsive systems by improving the performance based on the foil-foil interaction. |
| تدمد: | 1089-7666 1070-6631 |
| DOI: | 10.1063/1.4978301 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::8f930a8f32d25cbef60e9605e4bb6b5d https://doi.org/10.1063/1.4978301 |
| رقم الانضمام: | edsair.doi...........8f930a8f32d25cbef60e9605e4bb6b5d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10897666 10706631 |
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| DOI: | 10.1063/1.4978301 |