Study on the Drag Reduction Characteristics of the Surface Morphology of Paramisgurnus dabryanus Loach

The drag reduction design of underwater vehicles is of great significance to saving energy and enhancing speed. In this paper, the drag reduction characteristics of Paramisgurnusdabryanus loach was explored using 3D ultra-depth field microscopy to observe the ar...

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Autores principales:	Liyan Wu, Jiaqi Wang, Guihang Luo, Siqi Wang, Jianwei Qu, Xiaoguang Fan, Cuihong Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	<i>Paramisgurnus</i> <i>dabryanus</i> loach scales microscopic morphology drag reduction characteristics bionic design Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/d25e53e0ef0b4566815146e26bfdec51
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id	oai:doaj.org-article:d25e53e0ef0b4566815146e26bfdec51
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spelling	oai:doaj.org-article:d25e53e0ef0b4566815146e26bfdec512021-11-25T17:16:26ZStudy on the Drag Reduction Characteristics of the Surface Morphology of <i>Paramisgurnus dabryanus</i> Loach10.3390/coatings111113572079-6412https://doaj.org/article/d25e53e0ef0b4566815146e26bfdec512021-11-01T00:00:00Zhttps://www.mdpi.com/2079-6412/11/11/1357https://doaj.org/toc/2079-6412The drag reduction design of underwater vehicles is of great significance to saving energy and enhancing speed. In this paper, the drag reduction characteristics of <i>Paramisgurnus</i><i>dabryanus</i> loach was explored using 3D ultra-depth field microscopy to observe the arrangement of the scales. Then, a geometric model was established and parameterized. A simulated sample was processed by computer numerical control (CNC) machining and tested through using a flow channel bench. The pressure drop data were collected by sensors, and the drag reduction rate was consequently calculated. The test results showed that the drag reduction rate of a single sample could reach 23% at a speed of 1.683 m/s. Finally, the experimental results were verified by numerical simulation and the drag reduction mechanism was explored. The boundary layer theory and RNG <i>k</i>-ε turbulence model were adopted to analyze the velocity contour, pressure contour and shear force contour diagrams. The numerical simulation results showed that a drag reduction effect could be achieved by simulating the microstructure of scales of the <i>Paramisgurnus</i><i>dabryanus</i> loach, showing that the results are consistent with the flow channel experiment and can reveal the drag reduction mechanism. The bionic surface can increase the thickness of boundary layer, reduce the Reynolds number and wall resistance. The scales disposition of <i>Paramisgurnus</i><i>dabryanus</i> loach can effectively reduce the surface friction, providing a reference for future research on drag reduction of underwater vehicles such as ships and submarines.Liyan WuJiaqi WangGuihang LuoSiqi WangJianwei QuXiaoguang FanCuihong LiuMDPI AGarticle<i>Paramisgurnus</i> <i>dabryanus</i> loachscalesmicroscopic morphologydrag reduction characteristicsbionic designEngineering (General). Civil engineering (General)TA1-2040ENCoatings, Vol 11, Iss 1357, p 1357 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	<i>Paramisgurnus</i> <i>dabryanus</i> loach scales microscopic morphology drag reduction characteristics bionic design Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	<i>Paramisgurnus</i> <i>dabryanus</i> loach scales microscopic morphology drag reduction characteristics bionic design Engineering (General). Civil engineering (General) TA1-2040 Liyan Wu Jiaqi Wang Guihang Luo Siqi Wang Jianwei Qu Xiaoguang Fan Cuihong Liu Study on the Drag Reduction Characteristics of the Surface Morphology of <i>Paramisgurnus dabryanus</i> Loach
description	The drag reduction design of underwater vehicles is of great significance to saving energy and enhancing speed. In this paper, the drag reduction characteristics of <i>Paramisgurnus</i><i>dabryanus</i> loach was explored using 3D ultra-depth field microscopy to observe the arrangement of the scales. Then, a geometric model was established and parameterized. A simulated sample was processed by computer numerical control (CNC) machining and tested through using a flow channel bench. The pressure drop data were collected by sensors, and the drag reduction rate was consequently calculated. The test results showed that the drag reduction rate of a single sample could reach 23% at a speed of 1.683 m/s. Finally, the experimental results were verified by numerical simulation and the drag reduction mechanism was explored. The boundary layer theory and RNG <i>k</i>-ε turbulence model were adopted to analyze the velocity contour, pressure contour and shear force contour diagrams. The numerical simulation results showed that a drag reduction effect could be achieved by simulating the microstructure of scales of the <i>Paramisgurnus</i><i>dabryanus</i> loach, showing that the results are consistent with the flow channel experiment and can reveal the drag reduction mechanism. The bionic surface can increase the thickness of boundary layer, reduce the Reynolds number and wall resistance. The scales disposition of <i>Paramisgurnus</i><i>dabryanus</i> loach can effectively reduce the surface friction, providing a reference for future research on drag reduction of underwater vehicles such as ships and submarines.
format	article
author	Liyan Wu Jiaqi Wang Guihang Luo Siqi Wang Jianwei Qu Xiaoguang Fan Cuihong Liu
author_facet	Liyan Wu Jiaqi Wang Guihang Luo Siqi Wang Jianwei Qu Xiaoguang Fan Cuihong Liu
author_sort	Liyan Wu
title	Study on the Drag Reduction Characteristics of the Surface Morphology of <i>Paramisgurnus dabryanus</i> Loach
title_short	Study on the Drag Reduction Characteristics of the Surface Morphology of <i>Paramisgurnus dabryanus</i> Loach
title_full	Study on the Drag Reduction Characteristics of the Surface Morphology of <i>Paramisgurnus dabryanus</i> Loach
title_fullStr	Study on the Drag Reduction Characteristics of the Surface Morphology of <i>Paramisgurnus dabryanus</i> Loach
title_full_unstemmed	Study on the Drag Reduction Characteristics of the Surface Morphology of <i>Paramisgurnus dabryanus</i> Loach
title_sort	study on the drag reduction characteristics of the surface morphology of <i>paramisgurnus dabryanus</i> loach
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d25e53e0ef0b4566815146e26bfdec51
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Study on the Drag Reduction Characteristics of the Surface Morphology of <i>Paramisgurnus dabryanus</i> Loach

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