CN104908828A - Attachment for reducing resistance through air film and pressure difference of vehicle body, and wind resistance reducing method - Google Patents
Attachment for reducing resistance through air film and pressure difference of vehicle body, and wind resistance reducing method Download PDFInfo
- Publication number
- CN104908828A CN104908828A CN201510317359.6A CN201510317359A CN104908828A CN 104908828 A CN104908828 A CN 104908828A CN 201510317359 A CN201510317359 A CN 201510317359A CN 104908828 A CN104908828 A CN 104908828A
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- air
- cover body
- flow
- additional device
- pressure pump
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/82—Elements for improving aerodynamics
Abstract
The invention discloses an attachment for reducing resistance through an air film and the pressure difference of a vehicle body, and a wind resistance reducing method. The attachment is a cover body which is installed on the outer surface of the vehicle body and provided with a top wall and two side walls. The top wall and the two side walls of the cover body are composed of sandwich plates internally provided with a plurality of air chambers, and a plurality of permeation holes which face outside the cover body are formed in each air chamber; a high pressure air pump is arranged at the front end of the vehicle body and used for conveying the air flow to each air chamber from the front end of the cover body through a pipeline, the air flow is ejected out of the outer surface of the cover body through the permeation holes in the top wall and the two side walls of the cover body, and thus the air film is formed on the outer surface of the cover body. The air film is in contact with and mixed with the air flow in the outside, thus the speed difference between the air flow in the outside and the cover body is reduced, the speed gradient of the boundary layer outside the vehicle body is lowered, and the viscous force friction effect is decreased, so that the wind resistance in the process of the vehicle is reduced.
Description
Technical field
The present invention relates to vehicle energy saving drag reduction technology field, particularly relate to a kind of car body air layers reducing resistance and pressure reduction drag reduction additional device and reduce the method for windage.
Background technology
Van is that a kind of what have nearly cube compartment take transport as the vehicle of main application, has the features such as maneuverability, compartment spaciousness, sealingly secure, be widely used in the transport field of land transportation due to it.Based on van huge use radix in the world, if the air resistance that it is suffered in the process of moving effectively can be reduced, the fuel oil consumption saved will be very considerable, under the situation particularly day by day increased in current energy resource consumption, reduce the sustainable development of energy resource consumption to the mankind most important.Correlative study shows, when vehicle travels with certain speed, a big chunk power of driving engine is used to overcome air resistance, and especially based on pressure drag and viscous friction drag, and ratio increases with the increase of the non-streaming linear degree of vehicle.
Summary of the invention
The object of the invention is to the shortcoming and defect overcoming above-mentioned prior art, a kind of car body air layers reducing resistance and pressure reduction drag reduction additional device are provided and reduce the method for windage.Reduce van air viscosity friction force suffered in the process of moving and air pressure difference resistance, improve effective fuel utilization ratio of van.
The present invention is achieved through the following technical solutions:
An additional device for car body air layers reducing resistance and pressure reduction drag reduction, described additional device is a cover body 4 with a roof, two sidewalls being arranged on car body outside face;
The roof of this cover body 4 and two sidewalls are all that the sandwich plate having multiple air chamber 9 by inside is formed, and each air chamber 9 all offer multiple diffusing air-hole 7 towards cover body outside;
Described additional device also comprises a high-pressure pump 1, air-flow is flowed to each air chamber 9 by the first gas access 10 of cover body front end by pipeline 8 by high-pressure pump 1, air-flow ejects the outside face of cover body 4 by the roof of cover body 4 and the diffusing air-hole 7 of two sidewalls, and forms air film 6 at the outside face of cover body 4.
The rear end of described cover body 4, the aft end face of i.e. roof and two sidewalls is distributed with multiple jet groove, air-flow is delivered to each jet groove by the second gas access 11 of cover body 4 front end by described high-pressure pump 1, and air-flow is from jet groove ejection and in hull back formation negative pressure.Described jet groove is divided into water jacket 13 and inside groove 12, and water jacket 13 and wall normal direction are 10 ° of angles, and inside groove 12 is in 30 ° of angles.
Described each air chamber 9 axially extends along cover body 4, and air-flow is by diffusing air-hole 7 Vertical dimension cover body 4 outer jet.
The pipeline that described high-pressure pump 1 connects the first gas access 10 and the second gas access 11 is distributed with flow regulating valve 3 and multidirectional flow divider valve 2.
Described high-pressure pump 1 is positioned over the car header bits of car body.
The method that above-mentioned additional device reduces car body windage is as follows:
Vehicle travels, and high-pressure pump 1 is opened, and high-pressure pump 1 is by a part of pneumatic convey in the jet groove of cover body 4 rear end, and air-flow is ejected by jet groove, fills up tailstock difference of pressure, reduces the tensile stress caused vehicle body; Meanwhile, another part pneumatic convey is given each air chamber 9 by high-pressure pump 1, diffusing air-hole 7 Vertical dimension cover body 4 outer jet that air-flow is distributed by roof and two sidewalls of cover body 4, and form air film 6 at cover body 4 outside face, this air film 6 contacts with external air flow 5, mixes, and reduces the velocity contrast of itself and cover body 4, the boundary layer velocity gradient outside car body is reduced, force of cohesion rubbing effect weakens, thus reduces the windage in vehicle travel process.
The present invention, relative to prior art, has following advantage and effect:
1) this car body air layers reducing resistance and pressure reduction drag reduction additional device, only need pretend the outside face at van, does not need to change the design of former vehicle.
2) this car body air layers reducing resistance and pressure reduction drag reduction additional device, the high pressure air of vehicle head is extracted and is transported to afterbody zone of negative pressure, namely the impact decreasing higher-pressure region (car is first) again reduces the impact of zone of negative pressure (tailstock), and there is larger pressure energy due to higher-pressure region air, reduce the requirement to high-pressure pump power, effectively energy-conservation.
3) by the roof of cover body 4 and diffusing air-hole 7 jet-stream wind of two sidewalls to the outside face of cover body 4, and forming air film 6 at the outside face of cover body 4, the air-flow (low speed) that diffusing air-hole 7 oozes out mixes to realize viscous friction with external air flow (at a high speed) and subtracts.
4) vehicle produces amount of heat in travelling, and hot air has better effect than normal temperature air in air layers reducing resistance mode, vehicle can be helped to dispel the heat simultaneously.
5) jet groove of hull back is divided into water jacket 13 and inside groove 12, and water jacket 13 and wall normal direction are 10 ° of angles, and inside groove 12 is in 30 ° of angles.Make the zone of negative pressure of afterbody be elongated taper, the jet groove of different angles can make tailstock barometric distribution more even, effectively reduces the impact that zone of negative pressure is caused.
Accompanying drawing explanation
Fig. 1 is that cover body of the present invention is combined with car body and always schemes.
Fig. 2 is cover body front elevation of the present invention.
Fig. 3 is cover body cross section view of the present invention.
Fig. 4 is that the present invention invents described cover body backsight part sectional view.
Fig. 5 is air-flow flow graph in described cover body.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is more specifically described in detail.
Embodiment
As shown in Fig. 1 to 5.The invention discloses the additional device of a kind of car body air layers reducing resistance and pressure reduction drag reduction, this additional device is a cover body 4 with a roof, two sidewalls being arranged on car body outside face;
The roof of this cover body 4 and two sidewalls are all that the sandwich plate having multiple air chamber 9 by inside is formed, and each air chamber 9 all offer multiple diffusing air-hole 7 towards cover body outside;
Described additional device also comprises a high-pressure pump 1, air-flow is flowed to each air chamber 9 by the first gas access 10 of cover body front end by pipeline 8 by high-pressure pump 1, air-flow ejects the outside face of cover body 4 by the roof of cover body 4 and the diffusing air-hole 7 of two sidewalls, and forms air film 6 at the outside face of cover body 4.
The rear end of described cover body 4, the aft end face of i.e. roof and two sidewalls is distributed with multiple jet groove, air-flow is delivered to each jet groove by the second gas access 11 of cover body 4 front end by described high-pressure pump 1, and air-flow is from jet groove ejection and in hull back formation negative pressure.
Described jet groove is divided into water jacket 13 and inside groove 12, and water jacket 13 and wall normal direction are 10 ° of angles, and inside groove 12 is in 30 ° of angles.
Described each air chamber 9 axially extends along cover body 4, and air-flow is by diffusing air-hole 7 Vertical dimension cover body 4 outer jet.
The pipeline that described high-pressure pump 1 connects the first gas access 10 and the second gas access 11 is distributed with flow regulating valve 3 and multidirectional flow divider valve 2.
Described high-pressure pump 1 is positioned over the car header bits of car body.
When vehicle high-speed runs, headstock place and contacting external air also extrude, head air is driven to do high-speed motion, in short time, air changes high-speed motion into by static, produce immense pressure, simultaneously, the aerial high-speed motion of vehicle makes hull back region not have enough air to fill up, form negative pressure, hinder advancing of vehicle, after being placed in high-pressure pump 1 unlatching of vehicle head, the high pressure air of car body head is pumped in pipeline, by pipeline, gas is passed through the first gas access 10, second gas access 11, and flow regulating valve 3 on pipeline and multidirectional flow divider valve 2 flow to air chamber 9 and jet groove respectively.
The flow that the Throttle Valve Control air-flow preset by the first gas access 10 (air film line entry) place is sprayed from diffusing air-hole 7 keeps comparatively low flow velocity.The air-flow entered from the second gas access 11 (pressure reduction line entry) arrives hull back jet groove, flow to flowing as shown in Figure 5, under the low pressure effect of hull back air-flow, water jacket 13 sprays with 10 ° of angle afterbodys, fills up the difference of pressure at tailstock car place far away; The air-flow that inside groove 12 ejects sprays with 30 ° of angle hull backs, fills up the difference of pressure at the nearly car place of the tailstock.The jet groove of these two different angles is due to the difference of external pressure difference, automatically the flow velocity of institute's jet-stream wind can be regulated, jet groove afterbody distribution as shown in Figure 4, institute's jet-stream wind is filled with hull back zone of negative pressure with the shape of circular cone comparatively equably, the injected gas in zone of negative pressure is filled up, and reduces the tensile stress that vehicle body causes.
In air chamber 9 steady pressure effect under, gas slowly oozes out from diffusing air-hole 7, is distributed in the outside face of cover body, contact with extraneous high speed incoming flow, mix, reduce the velocity contrast of itself and vehicle body, thus the boundary layer velocity gradient outside car body is reduced, force of cohesion rubbing effect weakens.Discharge amount of heat when vehicle is in operation, the air of continuous heating vehicle head, oozes out gas and becomes hot air from normal temperature, and viscosity increases but density reduces, and obtains the better viscous computation effect of comparatively normal temperature air under combined action.
The method that this additional device reduces car body windage realizes by following steps:
Vehicle travels, and high-pressure pump 1 is opened, and high-pressure pump 1 is by a part of pneumatic convey in the jet groove of cover body 4 rear end, and air-flow is ejected by jet groove, fills up tailstock difference of pressure, reduces the tensile stress caused vehicle body; Meanwhile, another part pneumatic convey is given each air chamber 9 by high-pressure pump 1, diffusing air-hole 7 Vertical dimension cover body 4 outer jet that air-flow is distributed by roof and two sidewalls of cover body 4, and form air film 6 at cover body 4 outside face, this air film 6 contacts with external air flow 5, mixes, and reduces the velocity contrast of itself and cover body 4, the boundary layer velocity gradient outside car body is reduced, force of cohesion rubbing effect weakens, thus reduces the windage in vehicle travel process.
As mentioned above, just the present invention can be realized preferably.
Embodiments of the present invention are not restricted to the described embodiments; other are any do not deviate from Spirit Essence of the present invention and principle under do change, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. an additional device for car body air layers reducing resistance and pressure reduction drag reduction, is characterized in that: described additional device is a cover body (4) with a roof, two sidewalls being arranged on car body outside face;
The roof of this cover body (4) and two sidewalls are all that the sandwich plate having multiple air chamber (9) by inside is formed, and each air chamber (9) all offer multiple diffusing air-hole towards cover body outside (7);
Described additional device also comprises a high-pressure pump (1), air-flow is flowed to each air chamber (9) by the first gas access 10 of cover body front end by pipeline 8 by high-pressure pump (1), air-flow ejects the outside face of cover body (4) by the roof of cover body (4) and the diffusing air-hole (7) of two sidewalls, and forms air film (6) at the outside face of cover body (4).
2. additional device according to claim 1, it is characterized in that: the rear end of described cover body (4), the aft end face of i.e. roof and two sidewalls is distributed with multiple jet groove, air-flow is delivered to each jet groove by second gas access (11) of cover body (4) front end by described high-pressure pump (1), and air-flow is from jet groove ejection and in hull back formation negative pressure.
3. additional device according to claim 2, is characterized in that: described each air chamber (9) axially extends along cover body (4), and air-flow is by diffusing air-hole (7) Vertical dimension cover body (4) outer jet.
4. additional device according to claim 2, it is characterized in that: described jet groove is divided into water jacket (13) and inside groove (12), water jacket (13) and wall normal direction are 10 ° of angles, and inside groove (12) is in 30 ° of angles.
5. additional device according to any one of claim 1 to 4, is characterized in that: the pipeline that described high-pressure pump (1) connects the first gas access 10 and the second gas access (11) is distributed with flow regulating valve (3) and multidirectional flow divider valve (2).
6. additional device according to claim 5, is characterized in that: described high-pressure pump (1) is positioned over the car header bits of car body.
7. adopt additional device according to any one of claim 1 to 6 to reduce the method for car body windage, it is characterized in that comprising the steps:
Vehicle travels, high-pressure pump (1) is opened, and high-pressure pump (1) is by a part of pneumatic convey in the jet groove of cover body (4) rear end, and air-flow is ejected by jet groove, fill up tailstock difference of pressure, reduce the tensile stress that vehicle body is caused; Meanwhile, another part pneumatic convey is given each air chamber (9) by high-pressure pump (1), diffusing air-hole (7) Vertical dimension cover body (4) outer jet that air-flow is distributed by roof and two sidewalls of cover body (4), and form air film (6) at cover body (4) outside face, this air film (6) contacts with external air flow (5), mixes, reduce the velocity contrast of itself and cover body (4), boundary layer velocity gradient outside car body is reduced, force of cohesion rubbing effect weakens, thus reduces the windage in vehicle travel process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510317359.6A CN104908828A (en) | 2015-06-11 | 2015-06-11 | Attachment for reducing resistance through air film and pressure difference of vehicle body, and wind resistance reducing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510317359.6A CN104908828A (en) | 2015-06-11 | 2015-06-11 | Attachment for reducing resistance through air film and pressure difference of vehicle body, and wind resistance reducing method |
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| CN104908828A true CN104908828A (en) | 2015-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510317359.6A Pending CN104908828A (en) | 2015-06-11 | 2015-06-11 | Attachment for reducing resistance through air film and pressure difference of vehicle body, and wind resistance reducing method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105365905A (en) * | 2015-11-17 | 2016-03-02 | 马东升 | Surface air blowing system for ground vehicle |
| CN105398461A (en) * | 2015-11-17 | 2016-03-16 | 马东升 | Air blowing system for railway train surface |
| CN105424381A (en) * | 2015-12-02 | 2016-03-23 | 华南理工大学 | Speed-adjustable carriage body surface air-injection resistance-reduction generating device and testing method thereof |
| CN106184429A (en) * | 2016-09-30 | 2016-12-07 | 西北工业大学 | Automobile tail damping device based on trousers and Coanda jet effect |
| CN107839770A (en) * | 2016-09-18 | 2018-03-27 | 湖南工业大学 | A kind of bionical attachment device of car tail bottom shark fins and its mounting arrangements method |
| CN109649513A (en) * | 2019-01-17 | 2019-04-19 | 沈阳航空航天大学 | A kind of air film type drop resistance method for reducing bus driving resistance |
| CN110356424A (en) * | 2019-06-26 | 2019-10-22 | 同济大学 | Train surface windage resistance system is reduced with blowing method interference air-flow |
| CN110386156A (en) * | 2018-04-18 | 2019-10-29 | 宁波大艾激光科技有限公司 | Air layers reducing resistance system, method and bullet train |
| CN111184312A (en) * | 2020-01-14 | 2020-05-22 | 承德石油高等专科学校 | Drag reduction sports helmet based on micro-jet technology and manufacturing method thereof |
| CN112429024A (en) * | 2020-12-15 | 2021-03-02 | 北京艾丁勒格科技发展有限公司 | Method and device for reducing surface air resistance of high-speed train |
| CN110386156B (en) * | 2018-04-18 | 2024-04-23 | 宁波大艾激光科技有限公司 | Air film drag reduction system, method and high-speed train |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105365905A (en) * | 2015-11-17 | 2016-03-02 | 马东升 | Surface air blowing system for ground vehicle |
| CN105398461A (en) * | 2015-11-17 | 2016-03-16 | 马东升 | Air blowing system for railway train surface |
| CN105424381A (en) * | 2015-12-02 | 2016-03-23 | 华南理工大学 | Speed-adjustable carriage body surface air-injection resistance-reduction generating device and testing method thereof |
| CN107839770A (en) * | 2016-09-18 | 2018-03-27 | 湖南工业大学 | A kind of bionical attachment device of car tail bottom shark fins and its mounting arrangements method |
| CN106184429A (en) * | 2016-09-30 | 2016-12-07 | 西北工业大学 | Automobile tail damping device based on trousers and Coanda jet effect |
| CN110386156A (en) * | 2018-04-18 | 2019-10-29 | 宁波大艾激光科技有限公司 | Air layers reducing resistance system, method and bullet train |
| CN110386156B (en) * | 2018-04-18 | 2024-04-23 | 宁波大艾激光科技有限公司 | Air film drag reduction system, method and high-speed train |
| CN109649513A (en) * | 2019-01-17 | 2019-04-19 | 沈阳航空航天大学 | A kind of air film type drop resistance method for reducing bus driving resistance |
| CN109649513B (en) * | 2019-01-17 | 2020-12-15 | 沈阳航空航天大学 | Air film type resistance reducing method for reducing driving resistance of passenger car |
| CN110356424A (en) * | 2019-06-26 | 2019-10-22 | 同济大学 | Train surface windage resistance system is reduced with blowing method interference air-flow |
| CN111184312A (en) * | 2020-01-14 | 2020-05-22 | 承德石油高等专科学校 | Drag reduction sports helmet based on micro-jet technology and manufacturing method thereof |
| CN112429024A (en) * | 2020-12-15 | 2021-03-02 | 北京艾丁勒格科技发展有限公司 | Method and device for reducing surface air resistance of high-speed train |
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Application publication date: 20150916 |
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