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首页> 外文期刊>Bioinspiration & biomimetics >Algorithmic-driven design of shark denticle bioinspired structures for superior aerodynamic properties
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Algorithmic-driven design of shark denticle bioinspired structures for superior aerodynamic properties

机译：鲨鱼初型生物悬浮结构的算法驱动设计，用于卓越空气动力学性能

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摘要

All engineering systems that move through fluids can benefit from a reduction in opposing forces, or drag. As a result, there is a significant focus on finding new ways to improve the lift-to-drag ratios of systems that move through fluids. Nature has proven to be an extremely beneficial source of inspiration to overcome current technical endeavors. Shark skin, with its low-drag riblet structure, is a prime example of an evolutionary design that has inspired new implementations of drag reducing technologies. Previously, it has been shown that denticles have drag reducing properties when applied to airfoils and other surfaces moving through fluids. Researchers have been able to mimic the structure of shark skin, but minimal work has been done in terms of optimizing the design of the denticles due to the large number of parameters involved. In this work, we use a combination of computational fluid dynamics simulations and optimization methods to optimize the size and shape of shark skin denticles in order to decrease drag. Results show that by changing the size, shape, and orientation of the denticles, the boundary layer can be altered, and thereby reduce drag. This research demonstrates that denticles play a similar role as vortex generators in energizing the boundary layer to decrease drag. These mechanisms, along with the fundamental knowledge gained through the study of these drag reducing structures can be applied to a vast number of fields including aeronautical, oceanic, and automotive engineering.
机译：通过流体移动的所有工程系统都可以从相反的力量减少或拖动中受益。因此，有重点是寻找新的方法来改善通过流体移动的系统的提升比率。自然已被证明是克服目前的技术努力的极其有益的灵感来源。鲨鱼皮，具有低拖曳式Riblet结构，是一种进化设计的主要示例，它激发了阻力减少技术的新实现。以前，已经表明，当施加到翼型和移动通过流体的其他表面时，牙本柱在施加到翼型和其他表面时具有减小性能。研究人员已经能够模仿鲨鱼皮的结构，但由于涉及的数量的参数优化牙本来的设计，已经完成了最小的工作。在这项工作中，我们使用计算流体动力学模拟和优化方法的组合来优化鲨鱼皮下牙髓的尺寸和形状，以减少阻力。结果表明，通过改变牙本来的尺寸，形状和方向，可以改变边界层，从而减少阻力。该研究表明，牙本丛在激励边界层中的涡流发生器来减少涡流时起着类似的作用。这些机制以及通过研究这些阻力减少结构的基本知识可以应用于包括航空，海洋和汽车工程的广大领域。

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