CN105416418A - Synthetic jet car drag reduction device - Google Patents
Synthetic jet car drag reduction device Download PDFInfo
- Publication number
- CN105416418A CN105416418A CN201510905775.8A CN201510905775A CN105416418A CN 105416418 A CN105416418 A CN 105416418A CN 201510905775 A CN201510905775 A CN 201510905775A CN 105416418 A CN105416418 A CN 105416418A
- Authority
- CN
- China
- Prior art keywords
- pressure sensor
- flow
- synthesizing jet
- synthetic jet
- driving governor
- 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.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention provides a synthetic jet car drag reduction device. The synthetic jet car drag reduction device comprises a first pressure sensor arranged at the front end of a car head, a second pressure sensor arranged at the rear end of a car tail and a synthetic jet spraying device arranged on the top of a windshield. The synthetic jet spraying device comprises a synthetic jet cavity formed by a piezoelectric vibrating diaphragm and a synthetic jet spraying opening and a piezoelectric driver arranged on the outer side of the piezoelectric vibrating diaphragm; a drive controller is connected to the piezoelectric driver, the first pressure sensor is connected with an input circuit of the drive controller through a signal processing device, and the second pressure sensor is connected with a feedback circuit of the drive controller through the signal processing device; and the drive controller controls the piezoelectric driver to drive the piezoelectric vibrating diaphragm to vibrate so as to generate the synthetic jet by receiving signals detected by the first pressure sensor and/or second pressure sensor. Influences of small air resistance on car running are reduced through an active drag reduction manner, and automobile oil consumption is further reduced.
Description
Technical field
The present invention relates to automobile resistance-reducing equipment technical field, particularly a kind of synthesizing jet-flow automobile resistance-reducing device.
Background technology
Automobile in motion, needs to squeeze ambient air, is subject to stream pressure and forms vacuum before automobile, produces difference of pressure.In addition, between each layer of air and air and car surface also there is friction, add the interference in air flow etc. that cooled engine, room draught and car surface evagination part cause, just define air resistance.Air resistance includes pressure drag (also known as form resistance), induced drag, skin resistance (also known as friction drag), internal drag (also known as Inner eycle resistance) and interference drag composition.Air resistance is relevant with the frontal area of model, automobile.Air resistance is directly proportional to automobile driving speed, and when galloping, the numerical value of air resistance will significantly increase.Automobile will move just must overcome air resistance, and when resistance increases, the propulsive effort of automobile also must and then increase, and also will increase automobile power consumption and oil consumption.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of synthesizing jet-flow automobile resistance-reducing device that can reduce air resistance of automobile and then reduce oil consumption.
For solving the problems of the technologies described above, the invention provides a kind of synthesizing jet-flow automobile resistance-reducing device, comprise the first pressure sensor being located at headstock front end, be located at the second pressure sensor of tailstock rear end, and be located at the synthesizing jet-flow jetting system of tailstock glass top, described synthesizing jet-flow jetting system comprises the synthesizing jet-flow cavity be made up of piezoelectric vibration barrier film and synthesizing jet-flow spout, be located at the piezoelectric actuator outside piezoelectric vibration barrier film, described piezoelectric actuator is connected with driving governor, described first pressure sensor is connected by the input circuit of signal processor unit with described driving governor, described second pressure sensor is connected by the reactive circuit of described signal processor unit with described driving governor, described driving governor controls described piezoelectric actuator by the signal receiving described first pressure sensor and/or described second pressure sensor detection and drives described piezoelectric vibration vibrate to produce synthesizing jet-flow.
Described driving governor adopts Piezoelectric Ceramic controller, and described Piezoelectric Ceramic controller also comprises DC voltage booster circuit, ac converter circuit, filter circuit.
Described synthesizing jet-flow jetting system also comprises power supply, and the voltage of described power supply is 12V.
Described first pressure sensor is provided with center, headstock front end, and described second pressure sensor is located at tailstock back-end central.
Described synthesizing jet-flow spout opening direction upwards.
Principle of work of the present invention is: during running car, when first being travelled by the first pressure sensor measured automobiles being installed on headstock front end, air-flow is relative to wind speed during running car, the wind speed recorded is collected by signal processor unit, and by signal processor unit, wind velocity signal is delivered to driving governor as controling parameters, driving governor outputs signal to piezoelectric actuator according to real-time wind speed, controls piezoelectric actuator and drives piezoelectric vibration vibrate to produce jet; Make jet from the ejection of synthesizing jet-flow spout, be separated the air-flow of bodywork surface.
Closed loop control process of the present invention is: when the numerical value that the first pressure sensor detects is greater than the first numerical value, and driving governor controls piezoelectric actuator and drives piezoelectric vibration barrier film to produce synthesizing jet-flow, is separated the air-flow of bodywork surface; When the numerical value that second pressure sensor detects is less than or equal to second value, driving governor controls piezoelectric actuator and quits work, and also just stops producing synthesizing jet-flow; When the numerical value that second pressure sensor detects is greater than second value, driving governor controls piezoelectric actuator and drives piezoelectric vibration barrier film to produce stronger synthesizing jet-flow, to be separated stronger air-flow, reaches the effect reducing resistance.Wherein the setting of the first numerical value and second value sets by driving governor.
The present invention compared with prior art advantage is: 1, synthesizing jet-flow strengthens and is exaggerated the vortex structure of separated region, and this vortex structure, with high momentum, injects stall spot and stall spot air-flow can be impelled comparatively early attached again.2, for laminar flow, synthesizing jet-flow jetting system can impel boundary 1ayer to turn in advance under working in high frequency to twist, be separated because turbulent boundary layer is more difficult, so can postpone to be separated to Transitional And Turbulent Flow in advance.3, synthesizing jet-flow plays the effect of " any equivalent aerodynamic configuration " near synthesizing jet-flow spout, thus impact is separated with control.4, the present invention arranges the second pressure sensor in tailstock rear end is because afterbody flow field is comparatively complicated, flow field real-time change, the speed in flow field after synthesizing jet-flow changes can be recorded by the second pressure sensor, and the reactive circuit of driving governor is delivered to by signal processor unit, now flow field velocity size is judged according to the parameter set in driving governor, thus drive piezoelectric vibration to control every vibration of membrane to piezoelectric actuator further, realize closed loop control.
To sum up, synthesizing jet-flow automobile resistance-reducing device provided by the invention be the less air resistance of mode of initiatively drag reduction on the impact of running car, and then reduce automobile fuel consumption.And the present invention controls whole fairing by driving governor, realize stream field and carry out accurately measuring and control, the mode that this fairing have employed closed loop control further can realize the real-time control of stream field.And the effect that this device use only two pressure sensors, synthesizing jet-flow jetting system can realize shunt air resistance, compact, be easy to install, and cost is lower, can be widely used in transportation means field.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is the structural representation that the present invention is arranged on automobile;
Fig. 2 is the lateral plan that the present invention is installed on automobile;
Fig. 3 is annexation structural representation of the present invention.
Detailed description of the invention
As Figure 1-3, a kind of synthesizing jet-flow automobile resistance-reducing device provided by the invention, comprise the first pressure sensor 1 being located at headstock 9 front end, be located at the second pressure sensor 2 of the tailstock 10 rear end, and be located at the synthesizing jet-flow jetting system at tailstock glass 11 top, synthesizing jet-flow jetting system comprises the synthesizing jet-flow cavity 6 be made up of piezoelectric vibration barrier film 4 and synthesizing jet-flow spout 3, be located at the piezoelectric actuator 5 outside piezoelectric vibration barrier film 4, piezoelectric actuator 5 is connected with driving governor 7, first pressure sensor 1 is connected by the input circuit of signal processor unit 8 with driving governor 7, second pressure sensor 2 is connected by the reactive circuit of signal processor unit 8 with driving governor 7, driving governor 7 controls piezoelectric actuator 5 by the signal receiving the first pressure sensor 1 and/or the detection of the second pressure sensor 2 and drives piezoelectric vibration barrier film 4 to vibrate generation synthesizing jet-flow.
In the above-described embodiment, driving governor 5 adopts existing Piezoelectric Ceramic controller, Piezoelectric Ceramic controller also comprises DC voltage booster circuit, ac converter circuit, filter circuit, the data analysis that can gather the first pressure sensor 1 gathered and the second pressure sensor 2, process, and control according to analysis result the synthesizing jet-flow that piezoelectric actuator 5 drives piezoelectric vibration barrier film 4 vibration generation varying strength, automobile resistance is dropped to minimum, reach good motoring condition, reduce oil consumption.
In the above-described embodiment, synthesizing jet-flow jetting system also comprises power supply, and the voltage of power supply is 12V, in order to this power supply easy for installation can use the electric power system of automobile itself to power.
In the above-described embodiment, in order to make the data that detect more accurate, the first pressure sensor 1 is located at center, headstock front end, and the second pressure sensor 2 is located at tailstock back-end central, be located at center and more can accurately detect the flow velocity of air relative to automobile, improve and control levels of precision.
In order to make synthesizing jet-flow more obvious to air flow effect, drag-reduction effect is better, and in present embodiment, synthesizing jet-flow spout 3 opening direction upwards.
Principle of work of the present invention is: during running car, when first being travelled by the first pressure sensor measured automobiles being installed on headstock front end, air-flow is relative to wind speed during running car, the wind speed recorded is collected by signal processor unit, and by signal processor unit, wind velocity signal is delivered to driving governor as controling parameters, driving governor outputs signal to piezoelectric actuator according to real-time wind speed, controls piezoelectric actuator and drives piezoelectric vibration vibrate to produce jet; Make jet from the ejection of synthesizing jet-flow spout, be separated the air-flow of bodywork surface.
Above-mentioned embodiment is intended to casehistory the present invention and can be professional and technical personnel in the field's realization or use; modifying to above-mentioned embodiment will be apparent for those skilled in the art; therefore the present invention includes but be not limited to above-mentioned embodiment; any these claims or specification sheets of meeting describes; meet and principle disclosed herein and novelty, the method for inventive features, technique, product, all fall within protection scope of the present invention.
Claims (5)
1. a synthesizing jet-flow automobile resistance-reducing device, it is characterized in that, comprise the first pressure sensor being located at headstock front end, be located at the second pressure sensor of tailstock rear end, and be located at the synthesizing jet-flow jetting system of tailstock glass top, described synthesizing jet-flow jetting system comprises the synthesizing jet-flow cavity be made up of piezoelectric vibration barrier film and synthesizing jet-flow spout, be located at the piezoelectric actuator outside piezoelectric vibration barrier film, described piezoelectric actuator is connected with driving governor, described first pressure sensor is connected by the input circuit of signal processor unit with described driving governor, described second pressure sensor is connected by the reactive circuit of described signal processor unit with described driving governor, described driving governor controls described piezoelectric actuator by the signal receiving described first pressure sensor and described second pressure sensor detection and drives described piezoelectric vibration vibrate to produce synthesizing jet-flow.
2. a kind of synthesizing jet-flow automobile resistance-reducing device according to claim 1, it is characterized in that, described driving governor adopts Piezoelectric Ceramic controller, and described Piezoelectric Ceramic controller also comprises DC voltage booster circuit, ac converter circuit, filter circuit.
3. a kind of synthesizing jet-flow automobile resistance-reducing device according to claim 1, it is characterized in that, described synthesizing jet-flow jetting system also comprises power supply, and the voltage of described power supply is 12V.
4. a kind of synthesizing jet-flow automobile resistance-reducing device according to claim 1, it is characterized in that, described first pressure sensor is provided with center, headstock front end, and described second pressure sensor is located at tailstock back-end central.
5. a kind of synthesizing jet-flow automobile resistance-reducing device according to claim 1, is characterized in that, described synthesizing jet-flow spout opening direction upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510905775.8A CN105416418A (en) | 2015-12-09 | 2015-12-09 | Synthetic jet car drag reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510905775.8A CN105416418A (en) | 2015-12-09 | 2015-12-09 | Synthetic jet car drag reduction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105416418A true CN105416418A (en) | 2016-03-23 |
Family
ID=55495068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510905775.8A Pending CN105416418A (en) | 2015-12-09 | 2015-12-09 | Synthetic jet car drag reduction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105416418A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191442A (en) * | 2017-05-26 | 2017-09-22 | 北京顺风光热科技有限公司 | It is a kind of that the method and device of high-speed object air drag is reduced based on power ultrasonic |
| CN107559270A (en) * | 2017-09-08 | 2018-01-09 | 浙江大学 | Synthesizing jet-flow flat board turbulent flow drag reduction device |
| CN108168006A (en) * | 2017-12-26 | 2018-06-15 | 武汉大学 | Synthesizing jet-flow and the double solar walls ventilating systems supplied of thermoelectricity |
| CN108725606A (en) * | 2017-04-21 | 2018-11-02 | 通用汽车环球科技运作有限责任公司 | The method of vehicle and aerodynamic drag for reducing vehicle |
| CN115273448A (en) * | 2022-07-20 | 2022-11-01 | 岚图汽车科技有限公司 | Method for reducing pneumatic resistance of front and rear vehicles and front and rear vehicle system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2915169A1 (en) * | 2007-04-19 | 2008-10-24 | Renault Sas | AERODYNAMIC DEVICE FOR A MOTOR VEHICLE COMPRISING A MEMBRANE WHICH IS AT THE SAME OF ACTUATOR AND SENSOR. |
| FR2931440B1 (en) * | 2008-05-22 | 2010-11-12 | Renault Sas | METHOD FOR CONTROLLING A SET OF ACTUATORS THAT MODIFY AERODYNAMIC CHARACTERISTICS OF A MOTOR VEHICLE |
| CN104149863A (en) * | 2014-08-25 | 2014-11-19 | 朱晓义 | Energy-saving automobile |
| CN104554493A (en) * | 2014-12-22 | 2015-04-29 | 吉林大学 | Vehicle with flow spraying, drag reducing and flow guide structure |
| CN205186324U (en) * | 2015-12-09 | 2016-04-27 | 吉林大学 | Synthetic efflux car fairing |
-
2015
- 2015-12-09 CN CN201510905775.8A patent/CN105416418A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2915169A1 (en) * | 2007-04-19 | 2008-10-24 | Renault Sas | AERODYNAMIC DEVICE FOR A MOTOR VEHICLE COMPRISING A MEMBRANE WHICH IS AT THE SAME OF ACTUATOR AND SENSOR. |
| FR2931440B1 (en) * | 2008-05-22 | 2010-11-12 | Renault Sas | METHOD FOR CONTROLLING A SET OF ACTUATORS THAT MODIFY AERODYNAMIC CHARACTERISTICS OF A MOTOR VEHICLE |
| CN104149863A (en) * | 2014-08-25 | 2014-11-19 | 朱晓义 | Energy-saving automobile |
| CN104554493A (en) * | 2014-12-22 | 2015-04-29 | 吉林大学 | Vehicle with flow spraying, drag reducing and flow guide structure |
| CN205186324U (en) * | 2015-12-09 | 2016-04-27 | 吉林大学 | Synthetic efflux car fairing |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108725606A (en) * | 2017-04-21 | 2018-11-02 | 通用汽车环球科技运作有限责任公司 | The method of vehicle and aerodynamic drag for reducing vehicle |
| CN107191442A (en) * | 2017-05-26 | 2017-09-22 | 北京顺风光热科技有限公司 | It is a kind of that the method and device of high-speed object air drag is reduced based on power ultrasonic |
| CN107191442B (en) * | 2017-05-26 | 2023-11-03 | 哈尔滨龙声超声技术有限公司 | Method and device for reducing air resistance of high-speed object based on power ultrasound |
| CN107559270A (en) * | 2017-09-08 | 2018-01-09 | 浙江大学 | Synthesizing jet-flow flat board turbulent flow drag reduction device |
| CN107559270B (en) * | 2017-09-08 | 2023-11-14 | 浙江大学 | Synthetic jet flat turbulence damping device |
| CN108168006A (en) * | 2017-12-26 | 2018-06-15 | 武汉大学 | Synthesizing jet-flow and the double solar walls ventilating systems supplied of thermoelectricity |
| CN115273448A (en) * | 2022-07-20 | 2022-11-01 | 岚图汽车科技有限公司 | Method for reducing pneumatic resistance of front and rear vehicles and front and rear vehicle system |
| CN115273448B (en) * | 2022-07-20 | 2023-11-10 | 岚图汽车科技有限公司 | Method for reducing aerodynamic resistance of front and rear vehicles and front and rear vehicle system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105416418A (en) | Synthetic jet car drag reduction device | |
| JP6294358B2 (en) | Active modular aerodynamic drag reduction device | |
| CN101441138A (en) | Test method and system of train pneumatic performance simulation test apparatus | |
| US9254876B2 (en) | Apparatus for reducing vehicle aerodynamic drag | |
| CA2552028C (en) | Method of controlling an aircraft in flight, especially to reduce wake vortices | |
| CN101441136A (en) | Synchronous transmitting observe and control method and system of train pneumatic performance simulation test apparatus | |
| CN204895460U (en) | Automatic adjusting device of a remotely piloted vehicle windage | |
| CN207191044U (en) | A kind of unmanned speed-regulating device based on surface evenness | |
| CN106043279A (en) | Lane shift control system based on crosswind influences and control method of lane shift control system | |
| CN106092495A (en) | The measuring method of aircraft body resistance in wind tunnel test | |
| CN202364181U (en) | Automobile horn volume control device | |
| CN205186324U (en) | Synthetic efflux car fairing | |
| CN204989975U (en) | Self -driving car with driving safety ensures function | |
| WO2017103143A1 (en) | Method for optimizing a position of an air deflector guiding an airflow around a vehicle and an air guiding device | |
| CN213267695U (en) | Sprinkler capable of automatically avoiding pedestrians | |
| CN205059588U (en) | Self -driving car system of paddling | |
| KR101372431B1 (en) | Device for variable dimple type reducing the aerodynamic drag of high speed train | |
| Whitehead et al. | Interaction of synthetic jet propulsion with airfoil aerodynamics at low Reynolds numbers | |
| CN109229105A (en) | Driving assistance system and method | |
| CN104512224A (en) | Automobile skylight component | |
| CN206884753U (en) | A kind of automobile CAN speed limit control system | |
| EP2671784B1 (en) | Apparatus for reducing vehicle aerodynamic drag | |
| CN210882130U (en) | Obstacle deflector with sawtooth-shaped spoiler at rear end | |
| CN209700792U (en) | A kind of pneumatic noise reduction automobile A column device based on active vortex control | |
| CN207173754U (en) | Active variant automobile tail fin mechanism control system based on marmem |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160323 |