两个自由飞行的鹰蛾(Manduca sexta)的功率-速度关系呈U形

2019/12/02   下载量： 0 次

方案摘要

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应用领域 航空航天
检测样本 航空
检测项目
参考标准 暂无

采用德国LaVision公司的时间分辨3D3C层析粒子成像测速系统（TRTOMO- PIV)对两个自由飞行的鹰蛾(Manduca sexta)的功率-速度关系进行了测量分析。

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A flying animal can minimize its energy consumption by choosing an optimal flight speed depending on the task at hand. Choice of flight speed can be predicted by modelling the aerodynamic power required for flight, and this tool has previously been used extensively in bird migration research. For insects, however, it is uncertain whether any of the commonly used power models are useful, as insects often operate in a very different flow regime from vertebrates. To investigate this, we measured aerodynamic power in the wake of two Manduca sexta flying freely in a wind tunnel at 1–3.8 ms21, using tomographic particle image velocimetry (tomo-PIV). The expended power was similar in magnitude to that predicted by two classic models. However, the most ubiquitously used model, originally intended for vertebrates, failed to predict the sharp increase in power at higher speeds, leading to an overestimate of predicted flight speed during longer flights. In addition to measuring aerodynamic power, the tomo-PIV systemyielded a highly detailed visualization of the wake,which proved to be significantly more intricate than could be inferred from previous smoke trail- and two-dimensional-PIV studies.

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北京欧兰科技发展有限公司
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