CN202190202U - Full condition vortex generator for vehicles - Google Patents
Full condition vortex generator for vehicles Download PDFInfo
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- CN202190202U CN202190202U CN2011202637463U CN201120263746U CN202190202U CN 202190202 U CN202190202 U CN 202190202U CN 2011202637463 U CN2011202637463 U CN 2011202637463U CN 201120263746 U CN201120263746 U CN 201120263746U CN 202190202 U CN202190202 U CN 202190202U
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- permanent magnet
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Abstract
The utility model discloses a full condition vortex generator for vehicles, comprising a casing, two permanent magnets, a vortex generating body and a metal coil, wherein an inlet end with a connecting flange and an outlet end with a connecting flange are arranged at the two ends of the casing; the two permanent magnets are positioned on two corresponding faces in the casing respectively, and the N pole of one permanent magnet corresponds to the S pole of the other permanent magnet to form a magnetic field in the casing; the vortex generating body is positioned at the longitudinal middle position in the casing near the entrance end; and the metal coil is positioned in the magnetic field, so that kinetic energy generated by fluid through Karman vortex street vibration is converted into electric energy. The full condition vortex generator for the vehicles is arranged between an engine air inlet pipe and an air filter, so that the full condition vortex generator not only can generate electricity on a moving vehicle but also can generate electricity when the vehicle is under the working condition of idle speed.
Description
Technical field
The present invention relates to a kind of TRT, especially a kind of device that utilizes Karman vortex street to produce alternating current, this device changes into electric energy with the kinetic energy that produces in the process fluid flow, and suitable vehicle uses comprising under the full operating mode of idling operation.
Background technology
When describing the motion of fluid (like air, water etc.), often use a dimensionless number, Reynolds number (Reynolds number), it has described the inertia force of fluid and the ratio of viscous force.The reynolds number Re of compressible fluid can represent with following formula,
Wherein, ρ, V
∞, μ represents the density of fluid respectively, speed and dynamic viscosity coefficient; L represents the characteristic length scales of object.When fluid was walked around the non-streamline object, owing to have adverse pressure gradient among the viscous boundary layer of body surface, surface boundary layer began to separate, and the development through certain hour in the tail at object rear, according to different Reynolds numbers, forms different flow patterns.A large amount of theories with experiment showed, in Reynolds number from 50 to 500 scopes, can form stablely, paired, alternately arrangement, that direction of rotation is opposite, constant spacing in tail the zone in, be the vortex of core with the laminar flow.Such flow pattern is called as Karman vortex street.Because the fluid force scholar Feng Kamen (1881～1963) of Germany takes the lead in this phenomenon has been carried out studying and gaining the name.Fig. 1 is that Karman vortex street forms sketch map.The structure of the vortex in the Karman vortex street can be explained with the principle of circular rector conservation.Promptly when a whirlpool when the boundary layer of bluff (or claim vortex generation body) comes off, the existence in the whirlpool that circular rector is opposite with it must be arranged.In reality,, fluid all can produce Karman vortex street when flowing through building, electric wire, bridge pier.The structure of the vortex in the Karman vortex street is stable, and the relation of vortex generation frequency and rate of flow of fluid is confirmed.Also use the characteristic that dimensionless group Strouhal number is described the flow field in the Karman vortex street always, Strouhal counts St and is defined as
Wherein, f is the shedding frequence of vortex, and its dependent variable as previously mentioned.The Strouhal number is generally fixed value 0.21.Thereby flow velocity can obtain through measuring the vortex shedding frequence.Widely used Karman vortex street flowmeter is exactly around this principle to process.
In the Karman vortex street at vortex generation body rear, vortex can be along coming flow path direction to move backward.Simultaneously because the existence of the circular rector of single vortex, this whirlpool can receive one with the incoming flow vertical direction on active force, i.e. lift.Thereby in Karman vortex street, fluid can receive the periodically active force of alternate on the direction vertical with coming flow path direction.According to active force and reaction force principle, fluid can produce also that the one-period sexual intercourse becomes, the active force vertical with coming flow path direction to this bluff, thereby object can vibrate coming to produce on the vertical direction of flow path direction.Should avoid the generation of this type phenomenon in some engineering practice, because this vibration can cause the tired of object and damage.For example U.S.'s tower Kerma (unit of kinetic energy) nullah bridge (Tacoma Narrow Bridge) wind is ruined accident and is promptly caused by Karman vortex street.
How utilizing the energy of this vibration of Karman vortex street generation to change into available energy, like electric energy, is the technical problem that the present invention solves.Designed a device among the present invention for this reason.The relative motion of air and vehicle it is placed in the vehicle of form, because can use the principle of Karman vortex street to generate electricity.When the idling operation of vehicle, stationary vehicle can't produce flowing of air.To this situation, the present invention has designed to the vortex street electric generator structure that is to use in the full operating mode of vehicle especially, is vehicle with full operating mode vortex street TRT.
Summary of the invention
The objective of the invention is to solve the problems of the technologies described above, and utilize the above-mentioned background technology, the kinetic energy that has produced when having designed a kind of can fluid being flowed changes into the device of electric energy, and can under the multi-state condition of vehicle, use, and comprises idling operation.
Karman vortex street TRT of the present invention is achieved through following technical proposals:
A kind of vehicle comprises with full operating mode vortex street generator, housing, and the two ends of said housing connect, and wherein an end is the arrival end that has flange, and an end has the port of export that is of flange; Permanent magnet lay respectively at two corresponding surfaces in the said housing, and a said permanent magnet N utmost point is extremely corresponding with another side permanent magnet S, in housing, forms magnetic field; Vortex generation body is positioned at housing; Wire coil is arranged in said magnetic field.
When fluid passes through vortex generation body, can produce Karman vortex street thereafter; Wire coil is regular cutting magnetic line under said Karman vortex street effect, and the magnetic flux that passes said wire coil is changed, and produces induced current.
In technique scheme; Said permanent magnet is arranged on the left and right sides corresponding surface of housing along housing bottom or top; The height h of said permanent magnet satisfies formula:
wherein H is the height of housing inner chamber, and L is the characteristic length of vortex generation body; Said wire coil is arranged on the said vortex generation body.
Wherein, The invention provides the execution mode of the elasticity vortex generation body of processing by the elasticity macromolecular material; About the two ends of said elasticity vortex generation body are fixedly installed on respectively on two corresponding surface permanent magnets or the housing, be in the upper end in magnetic field with the wire coil that is provided with on it.Said elasticity vortex generation body is elastomeric objects column, thin walled hollow, open at both ends, said wire coil be embedded on the inwall of said elasticity vortex generation body or uniform winding on the outer surface of said elasticity vortex generation body.
In technique scheme, the longitudinal section of said housing is preferably circle or rectangle or square or other polygons.
During use, this device is placed between the air inlet pipe and air filter of vehicle.The port of export that has adpting flange links to each other with air inlet pipe, and the arrival end that has adpting flange links to each other with the pipeline of air filter.Just this TRT is installed between original air inlet pipe of vehicle and the air filter.
The beneficial effect of Karman vortex street TRT of the present invention is:
Karman vortex street TRT of the present invention is through being provided with a vortex shedder in housing; The Karman vortex street that produces when fluid flows through causes the vibration of vortex generation body; Thereby drive or cause that the closed wire coil that is in the magnetic field moves together, because the vibration of the regularity of Karman vortex street makes the magnetic flux generating period property variation of passing closing coil; Thereby in wire coil, produce alternating current; The kinetic energy of Karman vortex street vibration is changed into electric energy, in vehicle that goes and static vehicle, all can use, use under the promptly full operating mode.
Secondly, this device has only several parts to form, and simple in structure, it is little to take up room, in light weight, and is low to using environmental requirement;
Description of drawings
Fig. 1 is the sketch map that Karman vortex street forms;
Among the figure, 1. come flow path direction, 2. vortex sounding body, 3. Karman vortex street.
Fig. 2 is vertical cross-sectional schematic of the Karman vortex street TRT of embodiment of the present invention;
Fig. 3 is that the A-A ' of Fig. 2 is to cross-sectional schematic;
Fig. 4 is the stereogram of Fig. 2;
Among the figure, 1. housing, 2. band adpting flange arrival end, the 3. permanent magnet N utmost point, 4. vortex generation body, 5. wire coil, the 6. permanent magnet S utmost point, the 7. port of export of band adpting flange, 11 apertures.
Embodiment
Mentality of designing of the present invention: in magnetic field, settle a wire coil, when closed wire coil is done the motion of cutting magnetic line in magnetic field, and let wire coil change, change even pass the magnetic flux of coil in the projected area of magnetic line of force direction.According to the law of electromagnetic induction, will produce electric current in the closed wire coil.According to this thinking; If pass to a wire coil that is placed in the fixing magnetic field to this power periodic, alternating direction that acts on the vortex generation body of the Karman vortex street in the background technology; Can make wire coil produce vibration; As long as guarantee that this periodic vibration has changed the magnetic flux that passes wire coil, then in wire coil, will produce alternating current.
If in the vehicle that goes, the relative motion meeting of air produces above-mentioned effect.Under the idling operation of vehicle, be static during vehicle, but the running of engine is appointed so can make and is produced flowing of air in the engine air inlet tube.Approach at use vortex street TRT under the multi-state of vehicle be the vortex street TRT is placed in air inlet pipe before.Like this, so long as engine running just has air to get into the housing of generator, generator just can be worked.Existing connected mode is in the vehicle, and the air inlet pipe front connects the pipeline of air filter.So one is used the approach of vortex street TRT under the full operating mode of vehicle be that the vortex street generator is placed between air inlet pipe and the air filter.
According to above-mentioned mentality of designing; Shown in Fig. 2 to 3, the present invention has given a kind of Karman vortex street TRT, comprises housing 1, two block permanent magnets (3; 6), vortex generation body 4 and wire coil 5, the two ends of housing 1 are provided with and have adpting flange arrival end 2 and have the adpting flange port of export 7; Two corresponding surfaces in the housing are respectively arranged with permanent magnet (3; 6), and the N utmost point of a permanent magnet 3 is extremely corresponding with the S of another side permanent magnet 6, thereby at two block permanent magnets (3; 6) form magnetic field in the middle of; Vertical centre position near the arrival end place in the housing is provided with vortex generation body 4, and when fluid passed through, it can produce Karman vortex street in the tail zone; Said wire coil 5 is arranged in the middle magnetic field of permanent magnet (3,6), and it is regular cutting magnetic line under said Karman vortex street effect, and the magnetic flux that passes said wire coil 5 is changed, and produces induced current.Two terminals of wire coil 5 are drawn through the aperture on the housing 11.Through embodiment and accompanying drawing, the present invention is further specified below:
Fig. 2 has provided vertical cross-sectional schematic (B-B ' that is Fig. 3 is to cutaway view) of the Karman vortex street TRT of embodiment of the present invention, Fig. 3 be the A-A ' of Fig. 2 to cutaway view, and Fig. 4 has provided the stereogram of Fig. 2.Can clearly be seen that from figure this device comprises the housing 1 with cause adpting flange arrival end 2 and the two ends perforation that has the adpting flange port of export 7, the longitudinal section of housing 1 is a rectangle; Two corresponding surfaces are provided with permanent magnet (3 along housing bottom about rectangular case 1 inside; 6), wherein the height h of two block permanent magnets (3,6) equals 1/2nd of housing 1 inner chamber height H; The N utmost point of permanent magnet 3 is extremely corresponding with the S of permanent magnet 6, and in the middle of permanent magnet 3 and permanent magnet 6, forms magnetic field; Upper end, said magnetic field is provided with Elastic Cylindrical vortex generation body, about the right ends of said Elastic Cylindrical vortex generation body 4 is stuck on the two corresponding surface housings 1.When fluid through elasticity vortex generation body, when on the vertical direction of fluid flow direction, producing vibration, cyclic deformation about elasticity vortex generation physical efficiency takes place in magnetic field.The outer surface of said elasticity vortex generation body 4 evenly is tied with wire coil 5, and the two-terminal of wire coil 5 is drawn from the aperture 11 on the housing 1.For guaranteeing not influence the proper flow direction of fluid, the outer surface that is tied with the elasticity vortex generation body 4 of wire coil 5 should be tried one's best smoothly.
As shown in Figure 3; Before this device placed engine air inlet tube, then air can get into housing 1 through the arrival end 2 that has flange, will produce Karman vortex street at its rear portion during through elasticity vortex generation body 4; Because the vortex generation body 4 in the present embodiment is an elasticity vortex generation body; Then Karman vortex street can cause elasticity vortex generation body 4 along on the incoming flow vertical direction deformation taking place, thereby drives wire coil 5 regular cutting magnetic line in the magnetic field in the middle of the permanent magnet (3,6); Because elasticity vortex generation body 4 is positioned in the magnetic field in the middle of the permanent magnet (3,6) on the horizontal direction of upper end, therefore; Under the dead-beat situation, pass the magnetic flux of wire coil 5 and fix, like Fig. 2; Shown in Figure 5, in the sealing area that is surrounded by wire coil, about two/part has magnetic flux to pass; And its generation under the Karman vortex street effect will cause that wire coil 5 parts that are wrapped in elasticity vortex generation body 4 depart from magnetic field when vibrating deformation up and down, get into magnetic field then; Cyclic variation; Thereby when making closed wire coil in magnetic field, the relative motion of cutting magnetic line take place,, thereby constantly produce the induced current that exchanges through the magnetic flux generating period property variation thereupon of closed wire coil.
In technique scheme, said elasticity vortex generation body is processed by the elasticity macromolecular material, like rubber; Rubber etc.; The shape of vortex generation body except that shown in Figure 2 cylindrical, also can be cross section and be rectangle, rhombus, trapezoidal etc. cylindricality, or other blunt forms; Said permanent magnet, can also be arranged on the left and right sides corresponding surface of housing along the housing top along housing bottom is provided with except that shown in Figure 2.Said elasticity vortex generation body is positioned at apart from arrival end and is not less than the 2L distance, thereby guarantees can play from arrival end to the passage the vortex generation body effect of water conservancy diversion, and incoming flow is kept evenly, steadily, behind vortex generation body, produces Karman vortex street.Wherein L represents the characteristic length of vortex generation body; Be the projected length size of the cross section of non-streamline object along the arrival end fluid flow direction; When the cross section of vortex generation body longshore current body direction is a bowlder, its characteristic length L is diameter of a circle (like Fig. 4), and as shown in Figure 8; When cross section when being trapezoidal, its characteristic length L is the longer base that vertical fluid flows to; When the cross section was rectangle, its characteristic length L was perpendicular to the rectangle length of side on the flow direction.The height h of said permanent magnet satisfies formula:
in the formula H be the height of housing inner chamber; L is the characteristic length of vortex generation body; Thereby guarantee when under the effect of elasticity vortex generation body at Karman vortex street deformation taking place; The motion of cutting magnetic line takes place in the wire coil above it thereupon; Guarantee that its magnetic flux changes thereupon, thereby produce induced current.Can uniform winding except that wire coil 5 as shown in Figure 4 on the outer surface of elasticity vortex generation body; When elasticity vortex generation body 4 is column, thin walled hollow, open at both ends; Wire coil 5 can also evenly be embedded on the inner surface of elasticity vortex generation body, makes the level and smooth inadequately and influence of fluid flow of its outer surface thereby avoid twining outer surface.
The prerequisite of utilizing this device to produce alternating current be must have fluid flow and also the Reynolds number of fluid should be in the Karman vortex street formation range.Because the air flow in the general air inlet pipe satisfies this condition.For example, speed air flow 2 meter per seconds in the air inlet pipe, the density of air and dynamic viscosity are respectively 1.2 kilograms per cubic meter and 1.8x10
-5Handkerchief second; 0.001 meter of the characteristic length scales of vortex generation body, the Reynolds number that then calculates according to formula (1) is 133.After Karman vortex street produced, vortex generation body received lift, F
L, its size is directly proportional with the length dimension of speed of incoming flow and object.According to static analytical methods and ignore the gravity of the object that vibrates, can obtain the lift that object receives at any time and the restoring force F of elasticity vortex generation body
SEquate,
F
L＝F
s (3)
According to Hooke's law, the stressed and distortion of elasticity vortex generation body can be expressed as linear dependence,
F
s＝k·dY (4)
Wherein, k is the linear deformation coefficient of elasticity vortex generation body, dY be object with the flow direction vertical direction on amount of movement.Can obtain from formula (3) and (4), this amount of movement does
DY also is the maximum amount of movement when considering the gravity of vibration object.Thereby this device be can be through selecting suitable elasticity vortex generation body parameter such as shape, deformation coefficient realize.Further dynamic analysis, the displacement y (t) that can the t in time that the object transverse vibration produces be changed is with following function representation,
y(t)＝A
0sin(2πf
et)， (6)
Wherein, A
0It is amplitude; f
eBe the frequency of oscillation of object, it can be equal or approaching with the shedding frequence of vortex according to the concrete condition in incoming flow flow field.
In the above-mentioned execution mode; When fluid flow direction was horizontal direction, Karman vortex street TRT of the present invention was the horizontal positioned operation, except that this occupation mode; TRT integral body after the installation can be used according to overturn any angle of fluid flow direction; Make vortex generation body become with ground any angle all can, only need to guarantee that the direction that fluid flows is parallel with housing, and the housing arrival end is placed use towards the direction of fluid origin.In addition; When fluid flow direction does not change; Can be that axle rotates 0 °～90 ° angles and uses with the fluid flow direction also, as when rotating 90 °, the vibration of the wire coil among the present invention receive the influence of vortex generation body and wire coil gravity with Karman vortex street TRT of the present invention.
Claims (7)
1. a vehicle comprises with full operating mode vortex street generator,
Housing, the two ends of said housing connect, and wherein an end is the arrival end that has flange, and an end has the port of export that is of flange; Permanent magnet lay respectively at two corresponding surfaces in the said housing, and a said permanent magnet N utmost point is extremely corresponding with another side permanent magnet S, in housing, forms magnetic field;
Vortex generation body is positioned at said housing;
Wire coil is arranged in said magnetic field.
2. vehicle according to claim 1 is with full operating mode vortex street generator; It is characterized in that; Said permanent magnet is arranged on the left and right sides corresponding surface of housing along housing bottom or top; The height h of said permanent magnet satisfies formula:
wherein H is the height of housing inner chamber, and L is the characteristic length of vortex generation body; Said wire coil is arranged on the said vortex generation body.
3. vehicle according to claim 2 is with full operating mode vortex street generator; It is characterized in that; The elasticity vortex generation body of said vortex generation body for being processed by the elasticity macromolecular material, the two ends of said elasticity vortex generation body are fixedly installed on respectively on obverse permanent magnet or the housing.
4. vehicle according to claim 3 is with full operating mode vortex street generator; It is characterized in that; Said elasticity vortex generation body is elastomeric objects column, thin walled hollow, open at both ends, said wire coil be embedded on the inwall of said elasticity vortex generation body or uniform winding on the outer surface of said elasticity vortex generation body.
5. vehicle according to claim 1 is characterized in that with full operating mode vortex street generator the longitudinal section of said housing is circle or polygon.
6. vehicle according to claim 1 is characterized in that with full operating mode vortex street generator the said arrival end that has flange is connected with the air filter of vehicle.
7. vehicle according to claim 1 is characterized in that with full operating mode vortex street generator the said port of export that has flange is connected with the air inlet pipe of vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202637463U CN202190202U (en) | 2011-07-25 | 2011-07-25 | Full condition vortex generator for vehicles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202637463U CN202190202U (en) | 2011-07-25 | 2011-07-25 | Full condition vortex generator for vehicles |
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| CN202190202U true CN202190202U (en) | 2012-04-11 |
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| CN2011202637463U Expired - Fee Related CN202190202U (en) | 2011-07-25 | 2011-07-25 | Full condition vortex generator for vehicles |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360000A (en) * | 2018-04-09 | 2019-10-22 | 上海汽车集团股份有限公司 | Direct-injection petrol engine air intake control method and control device |
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2011
- 2011-07-25 CN CN2011202637463U patent/CN202190202U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360000A (en) * | 2018-04-09 | 2019-10-22 | 上海汽车集团股份有限公司 | Direct-injection petrol engine air intake control method and control device |
| CN110360000B (en) * | 2018-04-09 | 2021-08-17 | 上海汽车集团股份有限公司 | Air intake control method for direct injection gasoline engine |
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Granted publication date: 20120411 Termination date: 20130725 |