一种利用局部动量亏损进行仿生皮肤空气动力学性能优化的新方法

2019/08/12   下载量: 0

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应用领域 医疗/卫生
检测样本 其他
检测项目
参考标准 暂无

采用LaVison的DaVis8.4软件平台和三台CMOS相机(Photron FastCAM SA1, 1 MegaPixel, 构成一套时间分辨3D3C抖盒子测量系统,并利用该系统对仿生皮肤的空气动力学性能进行了实验研究

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    A new approach is introduced to evaluate the potential drag reduction by skin suit design
in speed sport. The approach relies upon local flow information measured in the wake of a cyclist mannequin. Lagrangian Particle Tracking is employed to measure the distribution of time-average streamwise velocity in a cross-plane of 30 × 100 cm2 behind the stretched leg of the rider at a range of Reynolds numbers (0.4 × 105 < Re < 2.4 × 105). The expected Reynolds number effect is observed: a general wake narrowing at increasing speed. Unexpected local effects are also identified, which may be due to local variations in geometry of the rider’s leg. The conservation of momentum within a control volume containing the leg is used showing that the aerodynamic drag of the rider’s leg can be decreased by application of surface roughness. This outcome is validated by repeated measurements using zigzag tape on the legs’ surface.

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