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Underwater anti-drag surface with gas production and capture alternating structure and preparation method of underwater anti-drag surface

A gas alternating and gas technology, which is applied in the field of underwater drag reduction surface and preparation with alternating structure of gas production and gas capture, can solve problems such as large energy consumption, and achieve the effects of low cost, uniform and stable gas generation, and continuous self-supply.

Active Publication Date: 2022-03-15
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to continuously feed a large amount of air, which consumes a lot of energy.

Method used

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  • Underwater anti-drag surface with gas production and capture alternating structure and preparation method of underwater anti-drag surface
  • Underwater anti-drag surface with gas production and capture alternating structure and preparation method of underwater anti-drag surface
  • Underwater anti-drag surface with gas production and capture alternating structure and preparation method of underwater anti-drag surface

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Effect test

Embodiment 1

[0037] Such as Figure 1~3 As shown, an underwater drag reducing surface with alternating structure of gas production and gas capture, the drag reducing surface includes a substrate, the substrate is electrolyzed in a solution, the substrate is used as a cathode, and the solution can produce a solution of a gas, and a gas is generated at said substrate;

[0038] The solution may be an alkaline solution, such as potassium hydroxide solution, which generates hydrogen gas at the substrate during electrolysis.

[0039] The solution may be a neutral solution, such as sodium sulfate solution, which generates hydrogen gas at the substrate during the electrolysis process.

[0040] Described substrate is copper-nickel porous foam film 1 (as figure 2 Shown), the copper-nickel porous foam film 1 is fixed with a plurality of biaxially oriented polypropylene films (BOPP) 2, and there is a gap between two adjacent biaxially oriented polypropylene films 2, and the biaxially oriented polyp...

Embodiment 2

[0047] Such as Figure 1~3 As shown, a preparation method of an underwater drag-reducing surface with an alternating structure of gas production and gas capture, including:

[0048] (1) Cut the pure copper sheet into a rectangle of 15mm×10mm×0.2mm, polish it with 1000#, 2000#, 3000# sandpaper until it is bright, and use it as a working electrode.

[0049] (2) NiSO with 0.5~1.0M (mol / L) 4 ·6H 2 O, 0.01~0.05M CuSO 4 ·5H 2 O, 1.5-2.0M H 2 SO 4 , 1~1.5M HCL is used as the electrolyte, a cylindrical platinum wire with a diameter of 0.5mm is used as the counter electrode, 3M KCL is used as the reference electrode, and 1~2A / cm 2 Electrochemical deposition of three systems was carried out on the working electrode with a current density of 100-150 s to obtain a copper-nickel porous foam film 1 with a pore size of 60-100 μm and a thickness of 50-100 μm (such as figure 2 shown), which is used as the substrate for underwater drag reduction and self-generation of gas.

[0050] (3)...

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Abstract

The invention provides an underwater drag reduction surface with a gas production and capture alternating structure and a preparation method thereof, the drag reduction surface comprises a substrate, when the substrate is electrolyzed in a solution, the substrate serves as a cathode, the solution is a solution capable of producing gas during electrolysis, and the gas is produced at the substrate; the substrate is a copper-nickel porous foam film, a plurality of biaxially oriented polypropylene films are fixed on the substrate, a gap is formed between two adjacent biaxially oriented polypropylene films, the biaxially oriented polypropylene films are used for capturing bubbles formed by the gas, and the plurality of bubbles form an air curtain. According to the invention, the copper-nickel porous foam film is used as a working electrode for electrolysis in the electrolyte to realize self gas production, the biaxially oriented polypropylene film realizes gas capture, the captured bubbles form a gas curtain, and the resistance of the fluid to the navigation body is reduced.

Description

technical field [0001] The invention relates to the technical field of underwater drag-reducing surfaces, in particular to an underwater drag-reducing surface with an alternating structure of gas production and capture and a preparation method thereof. Background technique [0002] According to theoretical calculations, under the condition of constant power and energy, if the resistance is reduced by 10%, the cruising speed and range of the underwater vehicle can be increased by about 3.57% at the same time. Therefore, as a way to save energy consumption, research on underwater drag reduction is imperative. [0003] Research on drag reduction can be traced back to the 1930s, but the initial research work was mainly to reduce surface roughness, and the implicit assumption was that the smoother the surface, the lower the drag. Until 1990, researchers uncovered the mystery that dewdrops can roll on lotus leaves, that is, the "lotus leaf effect". The surface of the lotus leaf ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B9/60C25B11/03C25B11/046C25B1/04
CPCC25B9/60C25B11/03C25B11/046C25B1/04Y02E60/36Y02T70/10
Inventor 张晋管仁国王雪娇张美林杨洲范龙毅
Owner DALIAN JIAOTONG UNIVERSITY
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