CN108358156A - A kind of compound small rib structure of automatically cleaning pneumatic drag reduction micro-nano - Google Patents
A kind of compound small rib structure of automatically cleaning pneumatic drag reduction micro-nano Download PDFInfo
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- CN108358156A CN108358156A CN201711485905.2A CN201711485905A CN108358156A CN 108358156 A CN108358156 A CN 108358156A CN 201711485905 A CN201711485905 A CN 201711485905A CN 108358156 A CN108358156 A CN 108358156A
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- China
- Prior art keywords
- small rib
- drag reduction
- automatically cleaning
- rib structure
- riblet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B3/00—Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
- B81B3/0064—Constitution or structural means for improving or controlling the physical properties of a device
- B81B3/0067—Mechanical properties
- B81B3/007—For controlling stiffness, e.g. ribs
Abstract
The invention discloses a kind of compound small rib structures of automatically cleaning pneumatic drag reduction, belong to MEMS (MEMS) technical field.The structure includes：Surface has width in 30 microns of small rib structures below, and all small rib structures are parallel to each other along direction of extension.Whole surface has been evenly distributed the coarse nanoscale structures of low-surface-energy.The complex function with automatically cleaning, fluid drag-reduction can be achieved.The beneficial effects of the invention are as follows：The development that whirlpool is flowed to by inhibition reduces the inside and outside momentum-exchange of near wall, reduces viscous resistance.Has certain automatically cleaning ultra-hydrophobicity.The present invention is on the basis of extracting the drag reduction groove structure and lotus leaf surface automatically cleaning mastoid process structure of shark placoid scale, structure is carried out simplified and compound, devise a kind of new composite construction, super-hydrophobic synaptic structure is manufactured in the small rib structure upper surface of drag reduction so that the composite construction has pneumatic drag reduction, self-cleaning function simultaneously.
Description
Technical field
The present invention relates to a kind of compound riblet knots of automatically cleaning pneumatic drag reduction micro-nano being based on MEMS (MEMS) technology
Structure.
Background technology
Research shows that the viscous resistance of large-scale subsonic aircraft, the water surface or submarine navigation device accounts for the exhausted big portion of its drag overall
Point, therefore, how to reduce the viscous resistance of this kind of aircraft is the important research direction of drag reduction.It facts have proved by boundary layer
Laminar flow and turbulent closure scheme control technology, which reduce viscous resistance, has preferable engineer application potentiality.It is realized by changing surface texture
Boundary layer turbulence control be a very promising technical route in above-mentioned technology, wherein study it is most commonly used be derived from it is imitative
The riblet drag reduction technology of sharkskin.
Since 1979 or so, using beautiful, De Deng developed countries as multiple research teams of representative carried out largely about
The research of riblet drag reduction.The study found that the placoid scale of the regular distribution in the surface of shark, being formed in skin surface has enamel
Ridge, every placoid scale on piece has along the V-arrangement or U-shaped very low power for flowing to marshalling, makes the entire turbulence variation in boundary layer
Relative smooth surface smaller, it is possible to reducing the resistance of entire aircraft.
With Patent No. CN102343674A, entitled《Composite anti-drag covering with flexible wall and imitative sharkskin very low power
Production method》It is entitled with Patent No. CN102145567A《Bionic, drag-reducing membrane material based on shark skin surface and basal body structure
And preparation method thereof》A series of patents to represent are to imitate sharkskin very low power structure by the flexibility of biological template of sharkskin
The design and production method of covering.Although such methods can reappear the composite construction feature of biological structure surface complexity,
Do not have self-cleaning function, resistance reducing performance is easy to lose after contaminated.
It is entitled with patent No. CN103881120A in order to realize self-cleaning function《A kind of imitative lotus leaf super-hydrophobic automatic cleaning
The preparation method on surface》It is entitled with patent No. CN101691466A《A kind of preparation of spherical protuberances micro-structure surface anti-fouling material
Method》For a series of patents of representative, the lower structural material of surface energy can be made, can effectively realize self-cleaning surface function,
Although the performance for having underwater drag reduction may be taken into account, do not have the function of pneumatic drag reduction substantially.
Therefore, it allows riblet drag reduction technology to have self-cleaning function while keeping pneumatic drag reduction performance as possible, is small
Rib drag reduction technology is applied to one of the critical issue of engineering practice.
Invention content
The purpose of the present invention is：In order to solve original riblet technology pneumatic drag reduction and self-cleaning function cannot be provided simultaneously with
Problem proposes a kind of compound small rib structure of automatically cleaning pneumatic drag reduction micro-nano.
The characteristics of structure includes：Surface has width in 30 microns of small rib structures below, and all small rib structures edges are stretched
Open up that direction is parallel to each other, spacing between riblet is 15 to 25 times of small rib width, and the height of riblet is that 0.3 times of its width arrives
1 times；The arrangement mode of small rib structure can be continuous (as shown in Figure 1), and small rib structure has gap but gap arrangement is one
On straight line (as shown in Figure 2), small rib structure have gap but gap arrangement not point-blank (as shown in Figure 3).In addition,
It is evenly distributed nanoscale cynapse coarse structure on the top of all small rib structures.Substrate material layer upper surface can be smooth
Plane or smooth waved surface.
The beneficial effects of the invention are as follows：
From microcosmic aerodynamic angle, in addition to small rib structure itself, there should not be more knots in material surface
Structure, otherwise meaningless increase gas-solid contact area is easy instead increases resistance.In order to introduce the super-hydrophobic performance of automatically cleaning, we
It imitates the nanoscale synaptic structure of lotus leaf by only being introduced in riblet structure top end and realizes, and allow synaptic structure and riblet knot
Structure combines together.Wherein since nanoscale synaptic structure is only in riblet structure top end, so small rib structure still can inhibit to flow
Development to whirlpool, broken whirlpool drag reduction, and the synaptic structure array introduced, since nano level coarse structure becomes gas-solid contact area
Cause increasing inhibition effect to be not obvious greatly, therefore automatically cleaning and resistance reducing performance can be taken into account.Therefore, the shark shield that the present invention designs
The completely new composite construction that squama groove structure is merged with lotus leaf surface synaptic structure so that the composite construction has simultaneously pneumatically to be subtracted
Resistance, self-cleaning function solve the problems, such as the contaminated rear performance loss of existing its drag reduction structures of riblet drag reduction technology.
Description of the drawings
Fig. 1 is the sectional view of the compound small rib structure of single automatically cleaning pneumatic drag reduction micro-nano
Fig. 2 is the specific implementation 1 compound riblet structure top view of automatically cleaning pneumatic drag reduction micro-nano of case in embodiment
Fig. 3 is the specific implementation 2 compound riblet structure top view of automatically cleaning pneumatic drag reduction micro-nano of case in embodiment
Fig. 4 is the specific implementation 3 compound riblet structure top view of automatically cleaning pneumatic drag reduction micro-nano of case in embodiment
Specific implementation method
Specific embodiment one：
Riblet structure width is 30 microns, and all small rib structures are parallel to each other along direction of extension, and the spacing between riblet is
15 times of small rib width, the height of riblet are 0.3 times of its width, and the arrangement mode of small rib structure is continuous.All small
The top of rib structure is evenly distributed nanoscale cynapse coarse structure.Substrate material layer upper surface is smooth flat, such as Fig. 2 institutes
Show.
Specific embodiment two：
Riblet structure width is 25 microns, and all small rib structures are parallel to each other along direction of extension, and the spacing between riblet is
25 times of small rib width, the height of riblet are 1 times of its width, and small rib structure has gap but gap arrangement is in straight line
On.It is evenly distributed nanoscale cynapse coarse structure on the top of all small rib structures.Substrate material layer upper surface is smooth
Plane, as shown in Figure 3.
Specific embodiment three：
Riblet structure width is 28 microns, and all small rib structures are parallel to each other along direction of extension, and the spacing between riblet is
20 times of small rib width, the height of riblet are 1 times of its width, and small rib structure has gap but gap arrangement is in straight line
On.It is evenly distributed nanoscale cynapse coarse structure on the top of all small rib structures.Substrate material layer upper surface is smooth
Plane, as shown in Figure 4.
Claims (2)
1. a kind of compound small rib structure of automatically cleaning pneumatic drag reduction, which is characterized in that surface has width below small at 30 microns
Rib structure, all small rib structures are parallel to each other along direction of extension, and the spacing between riblet is 15 to 25 times of small rib width, riblet
Height be 0.3 times to 1 times of its width；The arrangement mode of small rib structure is continuous or small rib structure has gap still
Gap arrangement is point-blank or small rib structure has a gap but gap arrangement not point-blank；In all riblets
The top of structure is evenly distributed nanoscale cynapse coarse structure.
2. a kind of compound small rib structure of automatically cleaning pneumatic drag reduction as described in claim 1, it is characterised in that the base material
Layer upper surface is smooth flat or smooth waved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711485905.2A CN108358156A (en) | 2017-12-29 | 2017-12-29 | A kind of compound small rib structure of automatically cleaning pneumatic drag reduction micro-nano |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711485905.2A CN108358156A (en) | 2017-12-29 | 2017-12-29 | A kind of compound small rib structure of automatically cleaning pneumatic drag reduction micro-nano |
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| CN108358156A true CN108358156A (en) | 2018-08-03 |
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| CN201711485905.2A Pending CN108358156A (en) | 2017-12-29 | 2017-12-29 | A kind of compound small rib structure of automatically cleaning pneumatic drag reduction micro-nano |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11766822B2 (en) | 2019-08-20 | 2023-09-26 | 3M Innovative Properties Company | Microstructured surface with increased microorganism removal when cleaned, articles and methods |
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| CN101758864A (en) * | 2010-01-14 | 2010-06-30 | 浙江大学 | Bionic non-smooth surface film with pneumatic drag reduction effect |
| US20110177288A1 (en) * | 2008-08-01 | 2011-07-21 | Bharat Bhushan | Hierarchical structures for superhydrophobic surfaces and methods of making |
| CN102886923A (en) * | 2012-10-23 | 2013-01-23 | 吉林大学 | Coupling bionic structure for improving erosion resistance of mechanical moving part surface |
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| CN103180059A (en) * | 2010-10-28 | 2013-06-26 | 3M创新有限公司 | Engineered surfaces for reducing bacterial adhesion |
| US20140242345A1 (en) * | 2013-02-28 | 2014-08-28 | Samsung Electronics Co., Ltd. | Composition for nano-composite layer with superhydrophobic surfaces, nano-composite layer with superhydrophobic surfaces formed therefrom, and preparing method thereof |
| CN107164746A (en) * | 2017-04-27 | 2017-09-15 | 武汉科技大学 | The preparation method on drag reduction copper surface |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110177288A1 (en) * | 2008-08-01 | 2011-07-21 | Bharat Bhushan | Hierarchical structures for superhydrophobic surfaces and methods of making |
| CN101758864A (en) * | 2010-01-14 | 2010-06-30 | 浙江大学 | Bionic non-smooth surface film with pneumatic drag reduction effect |
| CN103153841A (en) * | 2010-07-27 | 2013-06-12 | 加利福尼亚大学董事会 | Method and device for restoring and maintaining superhydrophobicity under liquid |
| CN103180059A (en) * | 2010-10-28 | 2013-06-26 | 3M创新有限公司 | Engineered surfaces for reducing bacterial adhesion |
| CN102886923A (en) * | 2012-10-23 | 2013-01-23 | 吉林大学 | Coupling bionic structure for improving erosion resistance of mechanical moving part surface |
| CN103043595A (en) * | 2012-12-14 | 2013-04-17 | 于晓勇 | Mildew proof antibacterial material with bionic micrometer structure surface and preparation method thereof |
| US20140242345A1 (en) * | 2013-02-28 | 2014-08-28 | Samsung Electronics Co., Ltd. | Composition for nano-composite layer with superhydrophobic surfaces, nano-composite layer with superhydrophobic surfaces formed therefrom, and preparing method thereof |
| CN107164746A (en) * | 2017-04-27 | 2017-09-15 | 武汉科技大学 | The preparation method on drag reduction copper surface |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11766822B2 (en) | 2019-08-20 | 2023-09-26 | 3M Innovative Properties Company | Microstructured surface with increased microorganism removal when cleaned, articles and methods |
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Application publication date: 20180803 |