CN210526686U - Freight passenger car aerodynamic resistance reducing device for improving flow field by jet flow - Google Patents
Freight passenger car aerodynamic resistance reducing device for improving flow field by jet flow Download PDFInfo
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- CN210526686U CN210526686U CN201921203392.6U CN201921203392U CN210526686U CN 210526686 U CN210526686 U CN 210526686U CN 201921203392 U CN201921203392 U CN 201921203392U CN 210526686 U CN210526686 U CN 210526686U
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- passenger car
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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
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
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Abstract
The utility model discloses an aerodynamic drag reduction device of a freight passenger car for improving a flow field by using jet flow, which comprises a guide plate component, wherein the guide plate component comprises two sections of guide plates, namely a first guide plate and a second guide plate; the transmission assembly is in transmission connection with the guide plate assembly so as to drive the guide plate assembly to be unfolded away from the carriage in a turnover mode or closed towards the carriage in a turnover mode; the jet flow assembly comprises an air pump, an air outlet end of the air pump is communicated with an air guide pipe, and a jet opening of the air guide pipe extends to the joint of the first guide plate and the second guide plate; the inclination angle of the second guide plate to the horizontal plane is larger than that of the inclined section to the horizontal plane. The utility model discloses a fairing is whole to be annex device, and is with low costs, can reequip in the technique of the freight transportation passenger train among the prior art, need not to change the outfit to the vehicle, can not influence the goods and load to improve the disengagement zone flow field through the efflux, reduce aerodynamic drag by a wide margin, realize practicing thrift the energy consumption.
Description
Technical Field
The utility model relates to an automobile aerodynamic drag reduction technical field specifically is an aerodynamic drag reduction device who is applicable to heavy freight passenger train, utilizes the efflux to improve the air current flow field.
Background
In the large background of energy crisis, a heavy passenger car with a ground occupancy of only 1% consumes 17% of the total fuel. The data show that when the running speed of the freight passenger car exceeds 80km/h, the pneumatic resistance accounts for 50 percent of the total resistance, and the ratio of the pneumatic resistance is continuously increased as the running speed of the freight passenger car is increased. In the aerodynamic resistance, the pressure difference resistance takes an absolute dominance.
At present, the car body of the household car is continuously close to a streamline shape by continuously optimizing the pneumatic appearance, and the oil consumption is gradually reduced. However, due to the limitation of heavy freight passenger cars, the carriages are rectangular cuboids with the purpose of facilitating the cargo loading and transportation and causing huge aerodynamic resistance.
The tail part of the carriage is the most severely changed part of the freight passenger car, airflow flows through the tail part of the car and loses wall attachment suddenly, a huge wake separation area is formed at the tail part of the car, the area of the formed separation area is huge, the huge separation area generates serious speed loss, the tail part of the truck forms a huge low-pressure area, the head part of the truck is over against the airflow, and the airflow is decelerated and stagnated to form a high-pressure area. The combined action of the high-pressure area and the low-pressure area of the head and the tail of the vehicle generates huge pressure difference resistance, which is the key for generating pneumatic resistance.
The guide plate has the effect of guiding the airflow to turn, and the addition of the guide plate can reduce the area of the tail separation area, so that the pressure difference resistance is reduced. When the length of the guide plate is fixed, the larger the steering angle is, the more obvious the effect of reducing the area of the tail separation area is, but because of the existence of the inverse pressure gradient, when the corner of the guide plate is too large, the airflow still can be separated.
Based on the technical problems in the prior art, those skilled in the art need to develop a resistance reducing device capable of reducing aerodynamic resistance to reduce the oil consumption of a passenger car for heavy-duty passenger cars aiming at the problem of large aerodynamic resistance of the passenger car.
SUMMERY OF THE UTILITY MODEL
The utility model provides an aerodynamic drag reduction device which is suitable for a heavy freight passenger car and utilizes jet flow to improve an airflow field.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model discloses an use efflux to improve freight train aerodynamic drag reduction device in flow field, this drag reduction device is integrated in freight train carriage afterbody, its characterized in that, this drag reduction device includes:
the guide plate assembly comprises two sections of guide plates, namely a first guide plate and a second guide plate;
the transmission assembly is in transmission connection with the guide plate assembly so as to drive the guide plate assembly to be unfolded away from the carriage in a turnover mode or closed towards the carriage in a turnover mode;
the jet assembly comprises an air pump, an air outlet end of the air pump is communicated with an air guide pipe, and a jet opening of the air guide pipe extends to the joint of the first guide plate and the second guide plate;
the first guide plate is provided with an inclined section which extends downwards in an inclined way with the horizontal plane;
the second guide plate is of a structure which extends downwards in an inclined way relative to the horizontal plane;
the inclination angle of the second guide plate to the horizontal plane is larger than that of the inclined section to the horizontal plane.
Furthermore, an installation body is formed at one end, close to the carriage, of the first guide plate, and the installation body is integrally formed with a first part and a second part;
the first part is hinged with the carriage through a hinge, and the mounting body is rotatably connected with the carriage through the first part;
when the transmission assembly drives the guide plate assembly to be far away from the carriage to be overturned and unfolded, the second part is attached to the edge of the carriage.
Further, the deflector assembly is of an integrally formed structure;
the first guide plate is divided into a horizontal section extending horizontally and the inclined section extending downwards along the horizontal direction in an inclined mode;
the inclined section forms an inclined angle theta with the horizontal plane1，θ1Is 12 degrees to 15 degrees;
one end of the first guide plate, which is close to the second guide plate, is bent downwards to form a structural body, the structural body and the first guide plate surround to form a jet gas cavity, and an airflow port facing the second guide plate is reserved in the jet gas cavity;
the jet opening of the air entraining pipe leads jet gas out of the airflow opening;
the second guide plate and the first guide plate are integrally formed through the structural body;
the inclined angle formed by the second guide plate and the horizontal plane is theta2，θ2Is 35-40 degrees.
Furthermore, a first vertical body vertically extends downwards from the end part of the inclined section of the first guide plate, which is close to one end of the second guide plate, and a second vertical body vertically extends upwards from the end part of the structural body, which faces one end of the second guide plate;
the first vertical body and the second vertical body are close to each other and a gap is reserved, and the gap is the air flow opening;
the second guide plate is fixedly connected with the second vertical body.
Further, the transmission assembly comprises a motor, and an output end of the motor is hinged with a connecting rod;
a shaft seat is arranged at the joint of the first guide plate and the mounting body;
one end of the connecting rod, which is far away from the servo motor, is hinged with the guide plate assembly on the shaft seat.
Furthermore, three sets of the damping devices are integrated at the tail part of the freight passenger car, and the three sets of the damping devices are respectively integrated at the upper part and two sides of the tail part of the freight passenger car.
In the technical scheme, the utility model provides a pair of use efflux to improve freight transportation passenger train aerodynamic drag reduction device in flow field has following beneficial effect:
1. the whole damping device of the utility model is an accessory device, has low cost, can be modified on the technology of the freight passenger car in the prior art, does not need to change the vehicle, does not influence the loading of goods, improves the flow field of the separation area through jet flow, greatly reduces the aerodynamic resistance and realizes energy saving;
2. the utility model discloses a fairing passes through drive assembly and realizes all receiving and releasing of guide plate subassembly, can practice thrift the space when not suitable for.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is a schematic structural diagram of a freight passenger car aerodynamic drag reduction device for improving a flow field by using jet flow, which is disclosed by an embodiment of the utility model;
fig. 2 is the utility model discloses an application efflux improves freight passenger train aerodynamic drag reduction device's of flow field junction structure enlargedly of first guide plate and second guide plate.
Description of reference numerals:
1. the tail part of the carriage; 2. a first baffle; 3. a second baffle; 6. a structure body;
201. a horizontal segment; 202. an inclined section;
401. a first part; 402. a second section; 403. a hinge;
501. a connecting rod; 502. a shaft seat; 503. a slide rail;
601. an airflow port; 602. a first vertical body; 603. a second vertical body.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
See fig. 1-2;
the application efflux of this embodiment improves freight train aerodynamic drag reduction device in flow field, this drag reduction device integrate in freight train carriage afterbody 1, its characterized in that, this drag reduction device includes:
the guide plate assembly comprises two sections of guide plates, namely a first guide plate 2 and a second guide plate 3;
the transmission assembly is in transmission connection with the guide plate assembly so as to drive the guide plate assembly to be turned and unfolded away from the carriage or turned and closed towards the carriage;
the jet flow assembly comprises an air pump, an air outlet end of the air pump is communicated with an air guide pipe, and a jet opening of the air guide pipe extends to the joint of the first guide plate 2 and the second guide plate 3;
the first baffle 2 has an inclined section 202 extending obliquely downward from the horizontal plane;
the second guide plate 3 is in a structure which extends downwards and slantwise relative to the horizontal plane;
the angle of inclination of the second baffle 3 to the horizontal is greater than the angle of inclination of the inclined section 202 to the horizontal.
Specifically, the embodiment discloses an aerodynamic drag reduction device capable of being integrated at the tail of a carriage of a heavy goods passenger car, which mainly uses jet flow to destroy the low-pressure environment of a separation area at the tail part 1 of the carriage, so as to ensure that no large pressure difference exists between the tail part 1 of the carriage and the head of the carriage, and further realize the design purpose of reducing air resistance; the damping device mainly comprises a guide plate assembly, a transmission assembly and a jet assembly; the baffle assembly is different from the baffles used in the prior art, and the baffle assembly of the embodiment is formed into two sections of baffles, namely the first baffle 2 and the second baffle 3; in order to form the diversion of the airflow, the first diversion plate 2 and the second diversion plate 3 are both required to be arranged in an inclined manner relative to the horizontal plane, and meanwhile, the inclined angles of the first diversion plate 2 and the second diversion plate 3 relative to the horizontal plane are different; furthermore, the fairing of this embodiment has integrateed the fluidic subassembly between first guide plate 2 and second guide plate 3, the fluidic subassembly passes through the air pump and produces the efflux gas to guide the efflux gas to between first guide plate 2 and the second guide plate 3 through the bleed pipe, because this department forms low pressure separation zone easily, order about the air current through the efflux gas and flow towards second guide plate 3, and destroy the low pressure separation zone, finally reduced the pressure differential of carriage afterbody 1 and locomotive, realize reducing air resistance's purpose. In addition, in consideration of the storage problem, the guide plate assembly is designed into a structure capable of being stored, and the guide plate assembly is unfolded and closed through the transmission assembly, so that the space is saved.
In addition, the following are to be noted: the control of the jet flow assembly and the transmission assembly of the embodiment is from the interior of the freight passenger car, and the controller of the freight passenger car is used as the main controller of the jet flow assembly and the transmission assembly, so that a driver can control the jet flow assembly and the transmission assembly in a cab.
Preferably, in this embodiment, an installation body is formed at one end of the first baffle 2 close to the cabin, and the installation body is integrally formed with a first portion 401 and a second portion 402; the first part 401 and the second part 402 of the present embodiment are formed into a "Z" shaped integral structure through an intermediate structural member, and the first part 401 and the second part 402 are designed to provide a mounting structure for realizing the rotational connection of the baffle assembly;
the method specifically comprises the following steps:
the first part 401 is hinged with the carriage through a hinge 403, and the mounting body is rotatably connected with the carriage through the first part 401; the hinge mode that this embodiment chooseed for use is the hinge, can order about the installation body when hinge drive pivot rotates and rotate, and then the drive rotates rather than integrated into one piece's guide plate subassembly to this kind of connected mode forms the expansion or the closure that realize guide plate subassembly, is less than 70km/h at the speed of a motor vehicle or other and does not need to use when air water conservancy diversion to accomodate the guide plate wholly, has practiced thrift the space.
When the transmission assembly drives the baffle assembly to turn and unfold away from the car, the second portion 402 abuts against the edge of the car.
Preferably, the guide plate assembly in this embodiment is an integrally formed structure;
the first baffle 2 is divided into a horizontal section 201 extending horizontally and an inclined section 202 extending obliquely downwards along the horizontal direction;
the inclined section 202 forms an inclined angle theta with the horizontal plane1，θ1Is 12 degrees to 15 degrees;
one end of the first guide plate 2, which is close to the second guide plate 3, is bent downwards to form a structural body 6, the structural body 6 and the first guide plate 2 form a jet gas cavity in a surrounding manner, and an airflow port 601 facing the second guide plate 3 is reserved in the jet gas cavity;
the jet port of the bleed pipe leads out jet gas from the airflow port 601;
the second guide plate 3 and the first guide plate 2 are integrally formed through a structural body 6;
the second guide plate 3 forms an inclination angle theta with the horizontal plane2，θ2Is 35-40 degrees.
In addition, based on the disclosure of the above embodiment, the end of the inclined section 202 of the first baffle 2 near one end of the second baffle 3 extends vertically downward to form a first vertical body 602, and the end of the structural body 6 facing one end of the second baffle 3 extends vertically upward to form a second vertical body 603;
the first vertical body 602 and the second vertical body 603 are close to each other and have a gap reserved, and the gap is an air flow port 601;
the second guide plate 3 is fixedly connected with the second vertical body 603.
The concrete structure of the guide plate assembly is mainly introduced, and the guide plate assembly is integrally formed during prefabrication, so that the structural stability is good; one end of the first guide plate 2 close to the second guide plate 3 forms an inclined section 202 forming a certain angle with the horizontal plane, and the inclined section 202 and the second guide plate 3 can guide the gas at the position towards the rear lower part; and the horizontal segment 201 that first guide plate 2 kept away from 3 one end of second guide plate flushes with the carriage edge basically, can be better like this carry out the drainage to carriage afterbody 1 air current to guide the air current to the guide plate subassembly gradually, finally follow the surface flow direction vehicle rear lower place of guide plate subassembly.
Considering that the low-pressure separation region needs to be damaged by using a jet flow mode, a structural body 6 is formed between the first guide plate 2 and the second guide plate 3, the structural body 6 is formed in a bent mode to form a three-surface surrounding structure, the upper part of the structural body 6 is closed by the first guide plate 2, meanwhile, a gap is reserved between the first vertical body 602 and the second vertical body 603, and the gap is a jet flow port 601, when the jet flow component is assembled, the jet flow component comprises an air pump and a bleed air pipe, the air pump can be considered to be installed at any position of a vehicle or a damping device, but it needs to be ensured that the jet flow port of the bleed air pipe communicated with the air pump is located in the space surrounded by the structural body 6, the outlet air needing to comprise the jet flow port faces the air flow port 601, and finally the jet flow gas is driven to be ejected from the air flow port 601 and driven to flow, therefore, the low-pressure separation area at the position is damaged, and the pressure difference between the tail part 1 of the carriage and the head of the carriage is reduced.
Preferably, the transmission assembly in this embodiment includes a motor, and an output end of the motor is hinged with a connecting rod 501; a shaft seat 502 is arranged at the joint of the first guide plate 2 and the mounting body; one end of the connecting rod 501, which is far away from the servo motor, and the deflector assembly are hinged to the shaft seat 502.
The structure of the preferred transmission assembly is as follows: the motor chooses for use servo motor, and servo motor is fixed in the carriage outer wall, and the servo motor output links to each other with the lead screw, has a slider on the lead screw and can remove in the slide rail, and the slider is connected and is driven the guide plate subassembly and rotate on connecting rod 501. The driving assembly is only described in one structure, and the conventional mechanical structure is only required to satisfy the requirement of driving the diversion plate assembly to unfold and close, which is the applicable range of the fairing of the embodiment, so that the driving assembly in the embodiment can have various structures capable of realizing the above functions, and is not limited to the above structure.
Firstly, the transmission assembly is designed for realizing the unfolding and the closing of the guide plate assembly, the rotating shaft is a common structure in hinge joint, the rotating connection of the connecting rod 501 and the guide plate assembly is realized by utilizing the rotating shaft, and the swinging of the connecting rod 501 can drive the guide plate assembly to integrally swing downwards or upwards under the driving of the motor so as to form the unfolding or the closing. Certainly, the damping device in this embodiment is used as an accessory of a passenger car, and it may also be considered to be integrated in the car tail 1 of the passenger car in a detachable manner, that is, when damping is required, the car is parked and the damping device is installed at a designated position of the car tail 1, and when damping is not required, the damping device is removed as a whole and stored at the designated position. The structure of dismouting compares and rotates the structure of connection and just can be easier, only need design the mount pad in carriage afterbody 1 suitable position to utilize fasteners such as bolt to accomplish the assembly.
Preferably, in the embodiment, three sets of the damping device are integrated on the rear part 1 of the freight passenger car, and the three sets of the damping device are respectively integrated on the upper part and two sides of the rear part 1 of the freight passenger car.
The motor of this embodiment chooses for use servo motor, and it has the feedback function, belongs to the comparatively motor commonly used in automated control, and the nature controlled is better. When the vehicle speed reaches 70km/h, the air pump is opened, the airflow port 601 starts to jet flow to the rear of the vehicle along the second guide plate 3, at the moment, the vehicle main controller reads the running speed of the freight passenger car, so that the incoming flow air speed is judged, the output pressure of the air pump is further adjusted, and the whole set of device is in the best state by controlling the speed ratio of the main flow to the jet flow.
The jet flow of the drag reduction device mainly has two parts:
firstly, can improve the holistic pneumatic state of passenger train, compensate its aerodynamic configuration's not enough, reduce the aerodynamic resistance of truck.
Secondly, 1 efflux of passenger train carriage afterbody can play the effect that increases the thrust simultaneously, has reduced the drive power of vehicle to a certain extent.
However, the jet flow consumes a certain amount of power, so that the incoming flow speed needs to be monitored in real time, and the jet flow pressure needs to be regulated so as to optimize the ratio of the incoming flow speed to the incoming flow speed.
When the freight passenger car runs at low speed and high speed, the Reynolds numbers of the whole freight passenger car are large and are in a Reynolds self-molding area, and the flow is similar at low speed and high speed. The improvement of the resistance of the jet to the freight passenger car at this time can be considered to depend only on the ratio v1/v2 of the incoming flow speed v1 of the freight passenger car to the jet flow speed v2 and the ratio m1/m2 of the incoming flow rate m1 (the flow rate m1 facing the truck is 0.5 ρ v ^ 2A, A is the area facing the truck) to the jet flow rate m 2.
The tail guide plate is designed with an airflow port with the width of 8mm to jet backwards, namely, the velocity ratio in the application process is the only factor influencing jet flow to improve flow field efficiency. In the laboratory stage, by utilizing a similar principle, when the ratio of the inflow area to the jet area is 125, the income and consumption of the jet are comprehensively considered, the optimal speed ratio is 0.3-0.4, and the power consumption can be reduced by about 25% under the same state.
In the technical scheme, the utility model provides a pair of use efflux to improve freight transportation passenger train aerodynamic drag reduction device in flow field has following beneficial effect:
the whole damping device of the utility model is an accessory device, has low cost, can be modified on the technology of the freight passenger car in the prior art, does not need to change the vehicle, does not influence the loading of goods, improves the flow field of the separation area through jet flow, greatly reduces the aerodynamic resistance and realizes energy saving;
the utility model discloses a fairing passes through drive assembly and realizes all receiving and releasing of guide plate subassembly, can practice thrift the space when not suitable for.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (6)
1. Use efflux to improve freight train aerodynamic drag reduction device in flow field, this drag reduction device is integrated in freight train carriage afterbody (1), its characterized in that, this drag reduction device includes:
the guide plate assembly comprises two sections of guide plates which are respectively a first guide plate (2) and a second guide plate (3);
the transmission assembly is in transmission connection with the guide plate assembly so as to drive the guide plate assembly to be unfolded away from the carriage in a turnover mode or closed towards the carriage in a turnover mode;
the jet flow assembly comprises an air pump, an air outlet end of the air pump is communicated with an air guide pipe, and a jet opening of the air guide pipe extends to the joint of the first guide plate (2) and the second guide plate (3);
the first deflector (2) has an inclined section (202) extending obliquely downwards from the horizontal plane;
the second guide plate (3) is of a structure which extends downwards and slantwise relative to the horizontal plane;
the inclination angle of the second guide plate (3) to the horizontal plane is larger than that of the inclined section (202) to the horizontal plane.
2. The device for aerodynamic drag reduction of a passenger car by using jet flow to improve a flow field according to claim 1, characterized in that the first deflector (2) is formed with a mounting body at one end close to the carriage, and the mounting body is integrally formed with a first part (401) and a second part (402);
the first part (401) is hinged with a carriage through a hinge (403), and the mounting body is in rotary connection with the carriage through the first part (401);
when the transmission assembly drives the guide plate assembly to turn and unfold away from the carriage, the second part (402) is attached to the edge of the carriage.
3. The aerodynamic drag reduction device of a passenger car for improving a flow field by using jet flow as claimed in claim 2, wherein the baffle assembly is an integrally formed structure;
the first guide plate (2) is divided into a horizontal section (201) extending horizontally and an inclined section (202) extending downwards along the horizontal direction in an inclined mode;
the inclined section (202) forms an inclined angle theta with the horizontal plane1，θ1Is 12 degrees to 15 degrees;
one end of the first guide plate (2), which is close to the second guide plate (3), is bent downwards to form a structural body (6), the structural body (6) and the first guide plate (2) surround to form a jet gas cavity, and a gas flow port (601) facing the second guide plate (3) is reserved in the jet gas cavity;
the jet opening of the air entraining pipe leads jet gas out of the airflow opening (601);
the second guide plate (3) is integrally formed with the first guide plate (2) through the structural body (6);
the second guide plate (3) forms an inclination angle theta with the horizontal plane2，θ2The value is 35-40 degrees.
4. The device for aerodynamic drag reduction of a passenger car by jet flow improvement of a flow field according to claim 3, characterized in that the end of the inclined section (202) of the first deflector (2) near the end of the second deflector (3) extends vertically downwards to form a first vertical body (602), and the end of the structural body (6) facing the end of the second deflector (3) extends vertically upwards to form a second vertical body (603);
the first vertical body (602) and the second vertical body (603) are close to each other and have a gap reserved, and the gap is the air flow opening (601);
the second guide plate (3) is fixedly connected with the second vertical body (603).
5. The passenger car aerodynamic drag reduction device applying jet flow to improve a flow field according to claim 3, characterized in that the transmission assembly comprises a motor, and an output end of the motor is hinged with a connecting rod (501);
the joint of the first guide plate (2) and the mounting body is provided with a shaft seat (502);
one end of the connecting rod (501), which is far away from the servo motor, is hinged with the guide plate assembly on the shaft seat (502).
6. The passenger car aerodynamic drag reduction device for improving flow field by using jet flow according to any one of claims 1 to 5, characterized in that three sets of the drag reduction device are integrated on the rear part (1) of the passenger car body, and the three sets of the drag reduction device are respectively integrated on the upper part and two sides of the rear part (1) of the passenger car body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921203392.6U CN210526686U (en) | 2019-07-29 | 2019-07-29 | Freight passenger car aerodynamic resistance reducing device for improving flow field by jet flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921203392.6U CN210526686U (en) | 2019-07-29 | 2019-07-29 | Freight passenger car aerodynamic resistance reducing device for improving flow field by jet flow |
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| CN210526686U true CN210526686U (en) | 2020-05-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110282034A (en) * | 2019-07-29 | 2019-09-27 | 北京航空航天大学 | Improve the shipping car air force damping device in flow field using jet stream |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110282034A (en) * | 2019-07-29 | 2019-09-27 | 北京航空航天大学 | Improve the shipping car air force damping device in flow field using jet stream |
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