Effect of Asymmetric Feathering Angle on the Aerodynamic Performance of a Flyable Bionic Flapping Wing Rotor
Effect of Asymmetric Feathering Angle on the Aerodynamic Performance of a Flyable Bionic Flapping Wing Rotor
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DOI：
10.2139/ssrn.4187482
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发表时间：
2023-03
期刊：
影响因子：
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通讯作者：
Si Chen;Le Wang;Jie Hu;Shijun Guo;Mingbo Tong;Yuanyuan He
中科院分区：
文献类型：
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作者：
Si Chen;Le Wang;Jie Hu;Shijun Guo;Mingbo Tong;Yuanyuan He
本文对不同扑翼幅度(−20°~50°，−50°~20°，−35°~35°)的扑翼旋翼气动特性进行了实验和数值研究。为了完成实验测试，本文设计了一台重18.7g的FWR。根据实验和数值计算的结果，在相同的输入电压下，与零平均冲程情况相比，正平均冲程和负平均冲程情况下具有更高的转速。尽管负的平均冲程角有助于产生更高的转速，但负的平均冲程角的情况往往会产生最小的升力功率比。另一方面，具有正平均冲程角度的情况往往具有最大的升力功率比(大约是零平均冲程角度情况下的1.25倍和负平均冲程角度情况下的1.6倍)。上述研究表明，采用正平均冲程角可以为进一步提高仿生翼型的气动性能提供一种有效的解决方案。
The current study involves an experimental as well as numerical study on the aerodynamic behavior of a flapping-wing rotor (FWR) with different feathering amplitudes (−20°–50°, −50°–20°, and −35°–35°). In order to fulfil the experimental test, an FWR which weighs 18.7 g is designed in this manuscript. According to the experimental and numerical results, it was observed that, compared with the cases under a zero average stroke angle, the cases under a positive average stroke angle or negative average stroke angle share a higher rotary speed given the same input voltage. Despite the fact that the negative average stroke angle would facilitate the generation of a higher rotary speed, the negative average stroke angle cases tend to generate the smallest lift-to-power ratio. On the other hand, the cases with a positive average stroke angle tend to share the largest lift-to-power ratio (about 1.25 times those of zero average stroke angle cases and about 1.6 times those of negative average stroke angle cases). The above study indicates that the application of a positive average stroke angle can provide an effective solution to further increase the aerodynamic performance of a bio-inspired FWR.