Flapping dynamics of inverted flags in a side-by-side arrangement
| Autor: | Hyung Jin Sung, Jaeha Ryu, Sung Goon Park |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Leading edge Mechanical Engineering Geometry 02 engineering and technology Immersed boundary method Condensed Matter Physics 01 natural sciences Displacement (vector) 010305 fluids & plasmas Physics::Fluid Dynamics 020303 mechanical engineering & transports Amplitude 0203 mechanical engineering 0103 physical sciences Flapping Trailing edge Potential flow Flag (geometry) |
| Zdroj: | International Journal of Heat and Fluid Flow. 70:131-140 |
| ISSN: | 0142-727X |
| Popis: | Two side-by-side inverted flags in a uniform flow were simulated using the immersed boundary method. An energy harvesting system consisting of the two inverted flags was analyzed, and the flapping motions of the flags were investigated with consideration for the flow-mediated interactions between them. The flapping motions of the flags were determined from the spanwise gap distance between the trailing edges of the two flags. In-phase and out-of-phase flapping motions were observed by varying the gap distance and the initial configuration. The relative spanwise displacement of the leading edge from the trailing edge, the strain energy, and the flapping frequency was examined as a function of the gap distance and the bending rigidity. The large peak-to-peak amplitude was induced by placing an additional inverted flag. The large mean strain energy was achieved due to the intensified flapping motions of each flag. The vortical structures produced by the inverted flags, along with the pressure and velocity distributions along the center line were explored for different gap distances. |
| Databáze: | OpenAIRE |
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