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仿生荷叶微结构表面的制备及其减阻性能

Preparation of a bionic lotus leaf microstructured surface and its drag reduction performance.

作者信息

Wang Huan, Luo Guihang, Chen Lei, Song Yuqiu, Liu Cuihong, Wu Liyan

机构信息

College of Engineering, Shenyang Agricultural University Shenyang 110866 P. R. China

Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University Changchun 130022 P. R. China.

出版信息

RSC Adv. 2022 Jun 6;12(26):16723-16731. doi: 10.1039/d2ra01495e. eCollection 2022 Jun 1.

DOI:10.1039/d2ra01495e
PMID:35754903
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9169552/
Abstract

Reducing machinery surface friction resistance can improve the efficiency of energy utilization. The lotus leaf, as everyone knows, has a strong capacity for self-cleaning and hydrophobicity. In this paper, the bionic surface of the lotus leaf was prepared in large-area, and its drag reduction performance was studied by both numerical simulation and experimental analysis. Experimental results showed that the maximum drag reduction rate of the bionic surface was 6.29% which appeared at a velocity of 3 m s. The contact state between liquid and bionic surface changed from Cassie state to Wenzel state with the increase of water flow velocity. The surface free energies of the bionic surface and smooth surface were 1.09 mJ m and 14.26 mJ m, respectively. In the droplet rolling experiment, the water droplet was a hemisphere when it rolled on the smooth surface, while it was an ellipsoid on the bionic surface. This study provides a theoretical basis for the structural design of bionic drag reduction surfaces, which are expected to be applied in underwater vehicles.

摘要

降低机械表面摩擦阻力可提高能源利用效率。众所周知，荷叶具有很强的自清洁和疏水性。本文大面积制备了荷叶仿生表面，并通过数值模拟和实验分析研究了其减阻性能。实验结果表明，仿生表面的最大减阻率为6.29%，出现在流速为3 m/s时。随着水流速度的增加，液体与仿生表面的接触状态从Cassie状态转变为Wenzel状态。仿生表面和平滑表面的表面自由能分别为1.09 mJ/m²和14.26 mJ/m²。在水滴滚动实验中，水滴在光滑表面滚动时呈半球形，而在仿生表面上呈椭球形。该研究为仿生减阻表面的结构设计提供了理论依据，有望应用于水下航行器。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/371430b6e215/d2ra01495e-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/2e82558e526f/d2ra01495e-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/53d5e6a57b91/d2ra01495e-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/c49146af84bd/d2ra01495e-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/0f15e7f1aca5/d2ra01495e-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/3b56615e39e1/d2ra01495e-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/d6e72efb87d6/d2ra01495e-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/f1489f1f9b60/d2ra01495e-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/4355e46f7079/d2ra01495e-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/f90c02aa1664/d2ra01495e-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/371430b6e215/d2ra01495e-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/2e82558e526f/d2ra01495e-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/53d5e6a57b91/d2ra01495e-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/c49146af84bd/d2ra01495e-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/0f15e7f1aca5/d2ra01495e-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/3b56615e39e1/d2ra01495e-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/d6e72efb87d6/d2ra01495e-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/f1489f1f9b60/d2ra01495e-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/4355e46f7079/d2ra01495e-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/f90c02aa1664/d2ra01495e-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0765/9169552/371430b6e215/d2ra01495e-f10.jpg

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Droplet rolling angle model of micro-nanostructure superhydrophobic coating surface.微纳结构超疏水涂层表面液滴滚动角度模型。
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Drag reduction mechanism of Paramisgurnus dabryanus loach with self-lubricating and flexible micro-morphology.
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泥鳅具有自润滑和灵活微观形貌的减阻机制。
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