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使用空间相关性分析研究肋条和超疏水表面在节能方面的作用。

The Roles of Riblet and Superhydrophobic Surfaces in Energy Saving Using a Spatial Correlation Analysis.

作者信息

Liu Chunye, Wang Wene, Hu Xiaotao, Fang Juan, Liu Fulai

机构信息

Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China.

School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.

出版信息

Nanomaterials (Basel). 2023 Feb 26;13(5):875. doi: 10.3390/nano13050875.

DOI:10.3390/nano13050875
PMID:36903754
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10005212/
Abstract

Riblet and superhydrophobic surfaces are two typical passive control technologies used to save energy. In this study, three microstructured samples-a micro-riblet surface (RS), a superhydrophobic surface (SHS), and a novel composite surface of micro-riblets with superhydrophobicity (RSHS)-were designed to improve the drag reduction rate of water flows. Aspects of the flow fields of microstructured samples, including the average velocity, turbulence intensity, and coherent structures of water flows, were investigated via particle image velocimetry (PIV) technology. A two-point spatial correlation analysis was used to explore the influence of the microstructured surfaces on coherent structures of water flows. Our results showed that the velocity on microstructured surface samples was higher than that on the smooth surface (SS) samples, and the turbulence intensity of water on the microstructured surface samples decreased compared with that on the SS samples. The coherent structures of the water flow on microstructured samples were restricted by length and structural angles. The drag reduction rates of the SHS, RS, and RSHS samples were -8.37 %, -9.67 %, and -17.39 %, respectively. The novel established RSHS demonstrated a superior drag reduction effect and could improve the drag reduction rate of water flows.

摘要

肋条和超疏水表面是两种典型的用于节能的被动控制技术。在本研究中，设计了三种微结构样品——微肋条表面（RS）、超疏水表面（SHS）以及具有超疏水性的新型微肋条复合表面（RSHS），以提高水流的减阻率。通过粒子图像测速（PIV）技术研究了微结构样品流场的各个方面，包括水流的平均速度、湍流强度和相干结构。采用两点空间相关性分析来探究微结构表面对水流相干结构的影响。我们的结果表明，微结构表面样品上的速度高于光滑表面（SS）样品上的速度，并且微结构表面样品上水流的湍流强度相比于SS样品有所降低。微结构样品上水流的相干结构受到长度和结构角度的限制。SHS、RS和RSHS样品的减阻率分别为-8.37%、-9.67%和-17.39%。新建立的RSHS表现出卓越的减阻效果，并且能够提高水流的减阻率。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/2062ffd61d6a/nanomaterials-13-00875-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/45c7d35dfc93/nanomaterials-13-00875-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/1de61cd5f651/nanomaterials-13-00875-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/ff9bdea8dd7c/nanomaterials-13-00875-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/f694ffad5517/nanomaterials-13-00875-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/f988fcdb473f/nanomaterials-13-00875-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/0c7becfd1f1d/nanomaterials-13-00875-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/2062ffd61d6a/nanomaterials-13-00875-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/45c7d35dfc93/nanomaterials-13-00875-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/1de61cd5f651/nanomaterials-13-00875-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/ff9bdea8dd7c/nanomaterials-13-00875-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/f694ffad5517/nanomaterials-13-00875-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/f988fcdb473f/nanomaterials-13-00875-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/0c7becfd1f1d/nanomaterials-13-00875-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2349/10005212/2062ffd61d6a/nanomaterials-13-00875-g007.jpg

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J Colloid Interface Sci. 2016 Jul 15;474:206-15. doi: 10.1016/j.jcis.2016.04.019. Epub 2016 Apr 16.
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