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用于减阻的激光烧蚀仿生周期性阵列鱼鳞表面

Laser Ablating Biomimetic Periodic Array Fish Scale Surface for Drag Reduction.

作者信息

Chen Dengke, Zhang Bowen, Zhang Haifeng, Shangguan Zheng, Sun Chenggang, Cui Xianxian, Liu Xiaolin, Zhao Zehui, Liu Guang, Chen Huawei

机构信息

College of Transportation, Ludong University, Yantai 264025, China.

Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai, Yantai 264006, China.

出版信息

Biomimetics (Basel). 2024 Jul 7;9(7):415. doi: 10.3390/biomimetics9070415.

DOI:10.3390/biomimetics9070415
PMID:39056856
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11274741/
Abstract

Reducing resistance to surface friction is challenging in the field of engineering. Natural biological systems have evolved unique functional surfaces or special physiological functions to adapt to their complex environments over centuries. Among these biological wonders, fish, one of the oldest in the vertebrate group, have garnered attention due to their exceptional fluid dynamics capabilities. Fish skin has inspired innovation in reducing surface friction due to its unique structures and material properties. Herein, drawing inspiration from the unique properties of fish scales, a periodic array of fish scales was fabricated by laser ablation on a polished aluminum template. The morphology of the biomimetic fish scale surface was characterized using scanning electron microscopy and a white-light interfering profilometer. Drag reduction performance was measured in a closed circulating water tunnel. The maximum drag reduction was 10.26% at a Reynolds number of 39,532, and the drag reduction performance gradually decreased with an increase in the distance between fish scales. The mechanism of the biomimetic drag reduction surface was analyzed using computational fluid dynamics. Streamwise vortices were generated at the valley of the biomimetic fish scale, replacing sliding friction with rolling friction. These results are expected to provide a foundation for in-depth analysis of the hydrodynamic performance of fish and serve as new inspiration for drag reduction and antifouling.

摘要

在工程领域，降低表面摩擦阻力具有挑战性。几个世纪以来，自然生物系统进化出了独特的功能表面或特殊的生理功能，以适应其复杂的环境。在这些生物奇迹中，鱼类作为脊椎动物中最古老的物种之一，因其卓越的流体动力学能力而备受关注。鱼皮因其独特的结构和材料特性，激发了在降低表面摩擦方面的创新。在此，受鱼鳞独特特性的启发，通过激光烧蚀在抛光铝模板上制备了周期性排列的鱼鳞。使用扫描电子显微镜和白光干涉轮廓仪对仿生鱼鳞表面的形态进行了表征。在封闭循环水洞中测量了减阻性能。在雷诺数为39532时，最大减阻率为10.26%，并且随着鱼鳞间距的增加，减阻性能逐渐下降。使用计算流体动力学分析了仿生减阻表面的机理。在仿生鱼鳞的谷底产生了流向涡旋，将滑动摩擦替换为滚动摩擦。这些结果有望为深入分析鱼类的流体动力学性能提供基础，并为减阻和防污提供新的灵感。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/bcefdcc8c834/biomimetics-09-00415-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/0a1803f2fbdc/biomimetics-09-00415-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/bf3afcaee0b5/biomimetics-09-00415-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/9064c894d825/biomimetics-09-00415-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/ced5492c30f5/biomimetics-09-00415-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/79634ea62844/biomimetics-09-00415-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/4d78cfa979d2/biomimetics-09-00415-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/e9f51d607f24/biomimetics-09-00415-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/945c4683fa35/biomimetics-09-00415-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/2c5880632264/biomimetics-09-00415-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/bcefdcc8c834/biomimetics-09-00415-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/0a1803f2fbdc/biomimetics-09-00415-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/bf3afcaee0b5/biomimetics-09-00415-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/9064c894d825/biomimetics-09-00415-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/ced5492c30f5/biomimetics-09-00415-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/79634ea62844/biomimetics-09-00415-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/4d78cfa979d2/biomimetics-09-00415-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/e9f51d607f24/biomimetics-09-00415-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/945c4683fa35/biomimetics-09-00415-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/2c5880632264/biomimetics-09-00415-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c8/11274741/bcefdcc8c834/biomimetics-09-00415-g010.jpg

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Transition delay using biomimetic fish scale arrays.采用仿生鱼鳞阵列实现过渡延迟。
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