CN106985766B - Self-adaptive biomimetic non-smooth surface film with pneumatic drag reduction function - Google Patents
Self-adaptive biomimetic non-smooth surface film with pneumatic drag reduction function Download PDFInfo
- Publication number
- CN106985766B CN106985766B CN201710154496.1A CN201710154496A CN106985766B CN 106985766 B CN106985766 B CN 106985766B CN 201710154496 A CN201710154496 A CN 201710154496A CN 106985766 B CN106985766 B CN 106985766B
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- CN
- China
- Prior art keywords
- smooth surface
- surface unit
- unit carrier
- convex closure
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/04—External Ornamental or guard strips; Ornamental inscriptive devices thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/02—Construction details of vehicle bodies reducing air resistance by modifying contour ; Constructional features for fast vehicles sustaining sudden variations of atmospheric pressure, e.g. when crossing in tunnels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D37/00—Stabilising vehicle bodies without controlling suspension arrangements
- B62D37/02—Stabilising vehicle bodies without controlling suspension arrangements by aerodynamic means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
Abstract
The invention discloses a kind of self-adaptive biomimetic non-smooth surface films with pneumatic drag reduction function.It includes matrix, variable height Non-smooth surface unit, Non-smooth surface unit carrier, intracavitary pressure liftable device, speed data collection device, controller.Several apertures are provided on Non-smooth surface unit carrier, there is a variable height Non-smooth surface unit Nian Jie with Non-smooth surface unit carrier sealing in each aperture, form convex closure, Non-smooth surface unit carrier edge is Nian Jie with matrix border sealing, closed inflating cavity is formed between the two, intracavitary pressure liftable device is used to adjust the air pressure of inflating cavity, the pad pasting is pasted onto passenger car, commercial vehicle or bullet train surface by the present invention, the pad pasting can adjust the height of convex closure according to real-time speed, so as to which body drag coefficient is effectively reduced.
Description
Technical field
The present invention relates to it is a kind of reduce product aerodynamic drag fexible film, especially for the passenger car run at high speed,
The self-adaptive biomimetic non-smooth surface film with pneumatic drag reduction function of commercial vehicle and bullet train.
Background technique
According to statistics from the Traffic Management Bureau of the Ministry of Public Security, by the end of the year 2016, national vehicle guaranteeding organic quantity is up to 2.9 hundred million, wherein automobile
1.94 hundred million.
Aerodynamic drag directly affects the power performance and the economy performance of automobile.As petroleum, natural gas and coal etc. can not be again
The raw energy is on the verge of exhaustion, and the ownership of automobile continues to increase, and reducing aerodynamic drag increasingly seems important.
Related data shows automobile speed V=60km/h, and aerodynamic drag accounts for about the 40% of drag overall, when V is close to 160km/
When h, drag overall is mainly caused by aerodynamic drag.If reducing by 0.03 averagely with automobile pneumatic resistance coefficient to calculate, garage
It sails fuel consumption per hundred kilometers and saves 2%, it is assumed that hundred kilometers of vehicle fuel consumption rate lOL/ averagely travels 10000 kilometers every year, and oil price is about
For 6 yuan/L, calculated according to car ownerships 1.94 hundred million in 2016, it is annual to save over ten billion RMB.
Improving fuel economy by reducing pneumatic drag coefficient is highly effective means.Researcher is meeting knot
Under the premise of structure, riding comfort require, vehicle body is developed using low-resistance " bluff body " as far as possible；It is each local pneumatic excellent to focus on vehicle body
Change design；Under the premise of meeting automobile function requirement, the exposed attachment element of vehicle body, the necessary exposed attaching of vehicle body are reduced as far as possible
Part streamlining；Underbody fairing as smooth as possible, or be completely covered.Aerodynamic drag system is reduced from shape-designing
Several research is highly developed, is difficult to make a breakthrough.
The deep proof of bionic non-smooth surface Research of Drag Reduction is pneumatic to reduce by pasting Non-smooth surface film in bodywork surface
The method of resistance coefficient has feasibility.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of self-adaptive biomimetic with pneumatic drag reduction function
Non-smooth surface film.
What the purpose of the present invention was achieved through the following technical solutions:
A kind of self-adaptive biomimetic non-smooth surface film with pneumatic drag reduction function, including matrix, several variable heights
Non-smooth surface unit, Non-smooth surface unit carrier, intracavitary pressure liftable device, speed data collection device, controller are opened on Non-smooth surface unit carrier
There are several apertures, there is that a variable height Non-smooth surface unit is Nian Jie with Non-smooth surface unit carrier sealing in each aperture, is formed
Convex closure, Non-smooth surface unit carrier edge is Nian Jie with matrix border sealing, and closed inflating cavity, intracavitary air pressure liter are formed between the two
Drop device is used to adjust the air pressure of inflating cavity, speed data collection device and controller collection at being mounted on pad pasting, the variable height
Non-smooth surface unit is lower than the material of 100MPa using elasticity modulus, if rubber, PVC0.007 are plasticized, Non-smooth surface unit carrier and base
Body is all made of the material that elasticity modulus is higher than 1GPa, such as high pressure polyethylene, polypropylene.
In above-mentioned technical proposal, the aperture on the Non-smooth surface unit carrier is in regularly arranged.
The height H of the variable height Non-smooth surface unit convex closure can be to change in 0.2-10mm in range.
The working principle of the pad pasting is as follows:
Speed data collection device acquisition vehicle current vehicle speed is simultaneously transmitted to controller, decides whether after being handled by controller to inflation
Cavity inflation/deflation, to adjust the height of Non-smooth surface unit convex closure.
For the convex closure of different materials, gas in convex closure height H and inflating cavity can be obtained by way of testing in advance
The corresponding relation data of pressure, and store that data in controller, the foundation as controller control convex closure height H.
Further, the height of variable height Non-smooth surface unit can change with changes in vehicle speed.The non-light of variable height
The height of sliding unit convex closure can be specifically calculated by the following formula:
Wherein, V is the real-time speed of automobile, VyFor preset speed threshold value, 80km/h, H are such as taken1To preset
Convex closure height initial value, take 4-6mm, K is the constant for eliminating speed unit, and usually taking 60-80km/h, H is vehicle
The height of convex closure when speed is V.
Pneumatically subtract the beneficial effects of the present invention are: sticking the present invention on passenger car, commercial vehicle or bullet train surface and having
Body drag coefficient can be effectively reduced in the self-adaptive biomimetic non-smooth surface film of resistance function.
Detailed description of the invention
Fig. 1 is the schematic diagram of convex closure height dimension and film structure in the present invention.
Fig. 2 is the structural schematic diagram of convex closure.
Fig. 3 is the control principle drawing of variable convex closure height.
Specific embodiment
The invention will now be described in detail with reference to the accompanying drawings, and the objects and effects of the present invention will be more apparent.
The present invention has the self-adaptive biomimetic non-smooth surface film of pneumatic drag reduction function, it includes matrix, variable-volume
Non-smooth surface unit, Non-smooth surface unit carrier, inflating cavity, intracavitary pressure liftable device, speed signal receiver, controller.Structure
As shown in Figure 1, variable height Non-smooth surface unit 2 uses the lesser nonmetallic materials of rigidity, elasticity modulus especially can be used and be lower than
The material of 100MPa, if rubber, PVC0.007 are plasticized, Non-smooth surface unit carrier 3 and matrix 1 are then biggish nonmetallic using rigidity
The material that elasticity modulus is higher than 1GPa especially can be used in material, such as high pressure polyethylene, polypropylene, the sealing bonding of Non-smooth surface unit 2
In each aperture of Non-smooth surface unit carrier 3, convex closure, the two Nian Jie with 1 edge seal of matrix of Non-smooth surface unit carrier 3 are formed
Between formed inflating cavity 4.
The height of variable height Non-smooth surface unit can change with the variation of air pressure size in inflating cavity.Such as Fig. 1 institute
Show, the height H of the convex closure is related with the size of air pressure in inflating cavity, and the variation range of its height is 0.2mm-10mm.
Driver can preset speed threshold value V before car engine according to driving conditionsy, and air pressure liter in transit chamber in advance
Drop device adjusts the size of air pressure in inflating cavity to control the elemental height H of convex closure1.As shown in Fig. 2, the convex closure formed is preferably in
Regularly arranged, preferred parameter is as follows: the convex closure center positioned at same row is away from L1=3mm-8mm, positioned at the convex closure center of same row
Away from L2=2mm-7mm.
The height of variable height Non-smooth surface unit can change with changes in vehicle speed.The height H of the convex closure will be with
The variation of speed and change, just started from automobile to automobile speed be less than vehicle velocity VyBefore, H=H1It remains unchanged.When driving conditions are prominent
It so changes, vehicle velocity V has significantly when rising and being stable at a certain vehicle speed intervals (such as 95-100km/h), intracavitary pressure liftable
Device will adjust reduce inflating cavity in air pressure come control reduce convex closure height H；Hereafter, if vehicle velocity V significantly decreases
And when being stable at a certain vehicle speed intervals (such as 85-90km/h), intracavitary pressure liftable device, which will adjust, increases air pressure in inflating cavity
To control the height H for increasing convex closure.
It is illustrated in figure 3 the control principle drawing of variable convex closure volume, when automobile just starts, system is initialized, and is driven
The vehicle velocity V that member passes through anticipation normally travelyTo set convex closure height initial value H1；Speed signal collector carries out speed real-time
Controller is acquired and communicates information to, as vehicle velocity V≤VyWhen, convex closure height keeps H1It is constant；When vehicle velocity V has on apparent
It rises and is stable at a certain vehicle speed intervals (Vy≤ V≤120km/h) when, pressure liftable device in driving chamber is reduced inflation sky by controller
Air pressure in chamber reduces the height H of convex closure to adjust；Hereafter, when vehicle velocity V significantly decreases and is stable at a certain vehicle speed intervals
When, pressure liftable device in driving chamber is increased the air pressure in inflating cavity to adjust the height H for increasing convex closure by controller, makes automobile
Aerodynamic drag under the speed in minimum.
Claims (3)
1. a kind of self-adaptive biomimetic non-smooth surface film with pneumatic drag reduction function, which is characterized in that including matrix (1),
Several variable height Non-smooth surface units (2), Non-smooth surface unit carrier (3), intracavitary pressure liftable device, speed data collection device, controller,
It is provided with several apertures on Non-smooth surface unit carrier (3), there is a variable height Non-smooth surface unit (2) and non-light in each aperture
Sliding unit carrier (3) sealing bonding, forms convex closure, and Non-smooth surface unit carrier (3) edge is Nian Jie with matrix (1) edge seal, and two
It is formed between person closed inflating cavity (4), intracavitary pressure liftable device is used to adjust the air pressure of inflating cavity (4), speed data collection device
With controller collection at being mounted on pad pasting, the variable height Non-smooth surface unit (2) is using elasticity modulus lower than 100MPa's
Material, Non-smooth surface unit carrier (3) and matrix (1) are higher than the material of 1GPa using elasticity modulus.
2. the self-adaptive biomimetic non-smooth surface film according to claim 1 with pneumatic drag reduction function, feature exist
In the aperture on the Non-smooth surface unit carrier (3) is in regularly arranged.
3. the self-adaptive biomimetic non-smooth surface film according to claim 1 with pneumatic drag reduction function, feature exist
In the height H variation range of described variable height Non-smooth surface unit (2) convex closure is 0.2-10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710154496.1A CN106985766B (en) | 2017-03-15 | 2017-03-15 | Self-adaptive biomimetic non-smooth surface film with pneumatic drag reduction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710154496.1A CN106985766B (en) | 2017-03-15 | 2017-03-15 | Self-adaptive biomimetic non-smooth surface film with pneumatic drag reduction function |
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| Publication Number | Publication Date |
|---|---|
| CN106985766A CN106985766A (en) | 2017-07-28 |
| CN106985766B true CN106985766B (en) | 2019-07-09 |
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| CN201710154496.1A Expired - Fee Related CN106985766B (en) | 2017-03-15 | 2017-03-15 | Self-adaptive biomimetic non-smooth surface film with pneumatic drag reduction function |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108454780B (en) * | 2018-04-24 | 2019-09-27 | 江苏科技大学 | A kind of adjustable damping device of surface parameter of imitative biological epidermis |
| CN113665607B (en) * | 2021-09-01 | 2023-01-06 | 中国海洋大学 | Bionic outer surface structure for reducing air resistance and noise in high-speed train |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19532998A1 (en) * | 1995-09-07 | 1997-03-13 | Daimler Benz Ag | Film for applying smooth surfaces to motor vehicle |
| CN105584542A (en) * | 2015-12-31 | 2016-05-18 | 浙江大学 | Coupling bionic non-smooth flexible surface pasted film with pneumatic drag reducing effect |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5839066B2 (en) * | 2014-03-19 | 2016-01-06 | 大日本印刷株式会社 | Decorative sheet and decorative member using the same |
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2017
- 2017-03-15 CN CN201710154496.1A patent/CN106985766B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19532998A1 (en) * | 1995-09-07 | 1997-03-13 | Daimler Benz Ag | Film for applying smooth surfaces to motor vehicle |
| CN105584542A (en) * | 2015-12-31 | 2016-05-18 | 浙江大学 | Coupling bionic non-smooth flexible surface pasted film with pneumatic drag reducing effect |
Non-Patent Citations (1)
| Title |
|---|
| 凹坑形仿生非光滑表面的减阻性能研究;赵军;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20090515(第5期);第30-34页 |
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| CN106985766A (en) | 2017-07-28 |
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