Marine Applications of the Biomimetic Humpback Whale Flipper
Marine Applications of the Biomimetic Humpback Whale Flipper
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DOI：
10.4031/mtsj.45.4.1
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发表时间：
2011-07-01
影响因子：
0.8
通讯作者：
Howle, Laurens E.
中科院分区：
文献类型：
--
作者：
Fish, Frank E.;Weber, Paul W.;Howle, Laurens E.
仿生方法通过将技术从自然技术转移到工程系统来寻求技术进步。座头鲸翼状鳍状肢的形态具有潜在的海洋应用价值。与传统水翼的笔直前沿不同，座头鲸的鳍状肢有许多正弦形的圆形突起，称为结节，这些突起沿着前沿周期性地排列。结节的存在改变了翼状表面上的水流，在结节之间产生了漩涡。这些漩涡与结节上方的流动相互作用，加速流动，帮助维持部分附着的边界层。与常规机翼的失速后状态相比，这种流体动力效应可以将失速延迟到更大的攻角，增加升力，减少阻力。由于座头鲸在海洋环境中的功能类似于一些工程海洋系统的雷诺制度，使用结节有可能提高翼状结构的性能。用于海洋技术的结节的具体应用包括帆船桅杆、风扇、螺旋桨、涡轮机和操纵面，如舵、潜水机、稳定器、扰流板和龙骨。
The biomimetic approach seeks technological advancement through a transfer of technology from natural technologies to engineered systems. The morphology of the wing-like flipper of the humpback whale has potential for marine applications. As opposed to the straight leading edge of conventional hydrofoils, the humpback whale flipper has a number of sinusoid-like rounded bumps, called tubercles, which are arranged periodically along the leading edge. The presence of the tubercles modifies the water flow over the wing-like surface, creating regions of vortex generation between the tubercles. These vortices interact with the flow over the tubercle and accelerate that flow, helping to maintain a partially attached boundary layer. This hydrodynamic effect can delay stall to higher angles of attack, increases lift, and reduces drag compared to the post-stall condition of conventional wings. As the humpback whale functions in the marine environment in a Reynolds regime similar to some engineered marine systems, the use of tubercles has the potential to enhance the performance of wing-like structures. Specific applications of the tubercles for marine technology include sailboat masts, fans, propellers, turbines; and control surfaces, such as rudders, dive planes, stabilizers, spoilers, and keels.