CN105675248B - A kind of active rotation roughness element and application method for realizing turbulivity quantified controlling - Google Patents
A kind of active rotation roughness element and application method for realizing turbulivity quantified controlling Download PDFInfo
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- CN105675248B CN105675248B CN201610067543.4A CN201610067543A CN105675248B CN 105675248 B CN105675248 B CN 105675248B CN 201610067543 A CN201610067543 A CN 201610067543A CN 105675248 B CN105675248 B CN 105675248B
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- turbulivity
- roughness element
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- fan blade
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
Abstract
The present invention provides a kind of active rotation roughness element for realizing turbulivity quantified controlling, including, bearing and top component, bearing and top component pass through rotation axis vertical connection respectively, wherein, three curved fan blade are uniformly arranged in rotation axis, the top of fan blade is connected with top component, and the top of fan blade and bearing leave gap.And application method, including, in measured point, air velocity transducer and turbulivity sensor are set, by the feedback of turbulivity sensor, to control the rotating speed of motor, so as to obtain desired purpose turbulivity, measured point is in the lower part of building, wherein, when turbulivity is too small, control module sends signal for faster to motor；When turbulivity is excessive, control module sends reduce-speed sign to motor, so that, Accurate Determining turbulivity.
Description
Technical field
The invention belongs to Wind Engineering field, more particularly to a kind of active rotation roughness element for realizing turbulivity quantified controlling
And application method.
Background technology
Wind tunnel test is the main research means in Wind Engineering field, with the simulated experiment means of atmospheric boundary layer wind tunnel not
Atmospheric turbulance boundary layer, DIFFUSION IN TURBULENCE, tail and object grinding in terms of by wind resistance, dynamic response scheduling theory can only be carried out
Study carefully, and substantial amounts of application study can be carried out.
At present, the wind tunnel simulation of atmospheric boundary layer is for the wind load of building, and atmosphere pollution matter is spread and some rings
The research of border science even military project etc. has particularly important meaning, its analogy method also enjoys the concern of scholars.
In existing analogy method, active analogy method and passive simulation method two types can be roughly divided into.Passive simulation side
The principle of method is to carry out different degrees of blocking to wind field using specific device and wind field wind speed shear layer is occurred, and will be a small amount of
Kinetic energy is converted into the pulsating energy of turbulent flow, so as to fulfill the simulation to atmospheric boundary layer.It is commonly used in passive simulation method
Method is the combination of vortex generator, baffle and roughness element.Roughness element mainly apply in wind tunnel experiment it is near the ground it is upper as meadow,
Trees, building etc., can influence the turbulence intensity of wind near the ground.
The effect of roughness element is obstruction air flow, and because constituting turbulence vortex the boundary layer separation on its border or surface
Generator, since the scale of roughness element is smaller, so its effect is confined within certain height, but due to actual big
Gas boundary layer is exactly that bottom wind velocity gradient is big, and bottom turbulivity is big, and since the size of model is limited be subject to wind-tunnel blocking rate
System and can not possibly ratio it is very big, so the effect of bottom wind field is even more important in wind-tunnel, the effect of roughness element should not be underestimated.Generally
In the case of, the size of roughness element is the cube of 100 × 100 × 100mm, and orderly is arranged in front of test section.
CN101377447A discloses a kind of rough element apparatus with variable rotary-out type wind tunnel, it includes：Multiple roughness elements, perforate
Four tablet, lower tablet (or frame) and hinge critical pieces.It is characterized in that：Roughness element shape is a quarter cylindrical section, should
One straight flange of roughness element is hinged on plate with opening, another straight flange be hinged on be placed in it is parallel with it under plate with opening under
On tablet (or frame)；Plate with opening is concordant with wind-tunnel bottom plate to be fixedly mounted, and lower tablet (or frame) is moved just to a direction
Roughness element is screwed out from the upper surface of perforated panel, change the back-out amount of roughness element by varying the amount of movement of lower tablet, so that
Change the roughness of whole perforated panel, the air-flow near the ground of all kinds of simulation of atmospheric boundary layer can be formed in wind-tunnel.The device can
Quickly and easily to realize the step-less adjustment of height of roughness element.
CN204882029U discloses a kind of large scale and the wind field arrangement of high turbulent flow.It is included in hole body ground horizontal stroke
The several vertical wedges being evenly arranged to interval；One piece of sawtooth baffle is fixed with the bottom of wedge, is consolidated in the middle and upper part of wedge
It is connected with another piece of transverse baffle；Between wedge and the turntable of test chamber be equipped with number row roughness elements, roughness element for three kinds not
With the square of size, size is carried out according to test requirements document, dilute close different roughness element arranges conversion；On center of turntable is vertical
Side is provided with three-dimensional fluctuating wind speed instrument, and three-dimensional fluctuating wind speed instrument is fixed on the cross bar of lifting instrument, the spy of three-dimensional fluctuating wind speed instrument
Liftoff 10cm, face direction of flow, lifting instrument are arranged in a side of hole body；The three-dimensional fluctuating wind speed instrument is adopted with data
Collecting system connects.
Prior art generally existing problems with：1st, roughness element influences the turbulence intensity of wind near the ground little.2nd, it is coarse
Influence of the change of the size, spacing of member to turbulence intensity is little, not sensitive enough.3rd, roughness element simulation bottom turbulence intensity with
There is certain gap under actual conditions.
The content of the invention
In view of technical problem existing in the prior art, the active of turbulivity quantified controlling is realized the present invention provides a kind of
Roughness element and application method are rotated, roughness element is made to the form of similar fan, can be rotated.It is fixed in special bearing
On, by fan bar and the construction of bearing, ensure that it can only be rotated along specified direction, the rotation direction of adjacent two rows roughness element
Conversely.So, it can not only play the role of roughness element, but also incoming wind can be cut, increase the disorderly degree of wind, so as to increase
Big near surface turbulence intensity.
Specifically, the present invention is achieved through the following technical solutions：
A kind of active rotation roughness element for realizing turbulivity quantified controlling, including, bearing and top component, bearing and top
Portion's component respectively by rotation axis vertical connection, wherein, three curved fan blade, fan blade are uniformly arranged in rotation axis
Top be connected with top component, the top of fan blade and bearing leave gap.
Wherein, the height ratio of preferably height of roughness element and fan blade is preferably 10：7.
The specifically high 100mm of preferred roughness element, wherein the height of three curved fan blade is 70mm, bottom support bracket
Thickness is 20mm, and the gap of blade and bearing is 10mm.
In above-mentioned preferred solution, further preferred blade edge is 40mm, a diameter of 20mm of rotation axis from rotation axis；Bearing
For the cylinder of an a diameter of 100mm, inside is fan blade powered rotation, top component is by Motor Control
One a diameter of 100mm, thickness are the circular cover of 5mm.
The effect of upper fan blade is circumgyration incision incoming wind, increases the disorderly degree of wind；The effect of cover board be in order to
Prevent the updraft of the excessive generation of wind speed from destroying wind profile.
The fan blade controls rotating speed and direction of rotation by being connected with the motor at lower seat.
The direction of rotation of fan blade is controlled by controlling the current direction at lower seat.Another preferred solution is wind
Fan leaf can also fissure of displacement arrangement, each row control by motor.
The material of top rotation axis and fan blade is the PVC material of lightweight；Lower seat is wooden or metal material,
It is fixed on the ground with certain mass.
Another object of the present invention is to provide a kind of making for active rotation roughness element for realizing turbulivity quantified controlling
With method, including, set in measured point (preferably measured point is located at the lower part of building, away from ground 100mm) air velocity transducer and
Turbulivity sensor, by the feedback of turbulivity sensor, to control the rotating speed of motor, so as to obtain desired purpose turbulent flow
Degree, measured point is in the lower part of building.
Flow order is as follows：Turbulivity sensor → control module → motor.
Wherein, when turbulivity is too small, control module sends signal for faster to motor；When turbulivity is excessive, mould is controlled
Block sends reduce-speed sign to motor.
Beneficial effect of the invention relative to the prior art, including：
1st, the direction of rotation of fan can be limited, and makes the direction of rotation of the roughness element of two adjacent groups opposite；
2nd, the cutting of the directional rotating of roughness element and blade to incoming wind, can increase incoming lower part turbulence intensity；
3rd, different degrees of lower part turbulence intensity can be obtained by adjusting the rotating speed of fan.
Brief description of the drawings
Fig. 1 components are set and test flow chart
Fig. 2 roughness element front views
Fig. 3 fan blade configurations schematic diagrames
Fig. 4 bearing schematic diagrames
The coarse identical permutation top views of Fig. 5
The coarse identical permutation stereograms of Fig. 6
Fig. 7 roughness elements and building arrangement schematic diagram, mainly there is air velocity transducer in wherein measured point in the lower part of building
With turbulivity sensor
A kind of sequential flowcharts of work experiment of Fig. 8
Sequential flowchart is made in the experiment of Fig. 9 another kinds work
Embodiment
With reference to embodiment and attached drawing, the present invention is described in further detail, but the embodiment invented is not limited to
This.
Embodiment 1
As shown in Fig. 1,2,3 and 4, a kind of active rotation roughness element for realizing turbulivity quantified controlling, including, bearing and
Top component, bearing and top component respectively by rotation axis vertical connection, wherein, be uniformly arranged in rotation axis three it is curved
Fan blade, the top of fan blade are connected with top component, and the top of fan blade and bearing leave gap.
The high 100mm of roughness element, wherein the height of three curved fan blade is 70mm, bottom support bracket thickness is 20mm,
The gap of blade and bearing is 10mm.
In above-mentioned preferred solution, further preferred blade edge is 40mm, a diameter of 20mm of rotation axis from rotation axis；Bearing
For the cylinder of an a diameter of 100mm, inside is fan blade powered rotation, top component is by Motor Control
One a diameter of 100mm, thickness are the circular cover of 5mm.
The fan blade controls rotating speed and direction of rotation by being connected with the motor at lower seat.
The material of top rotation axis and fan blade is the PVC material of lightweight；Lower seat is wood materials, is had certain
Quality fixes it on the ground.
Embodiment 2
A kind of active rotation roughness element for realizing turbulivity quantified controlling as described in Example 1, wherein, it is different from
, fan blade can also fissure of displacement arrangement, each row control by motor.
Embodiment 3
Shown in Fig. 5,6 and 7, wherein, a kind of active rotation roughness element for realizing turbulivity quantified controlling of embodiment 1 according to
Secondary arrangement.
Embodiment 4
Shown in Fig. 5,6 and 7, wherein, a kind of active rotation roughness element for realizing turbulivity quantified controlling of embodiment 2 according to
Secondary arrangement.
Embodiment 5
As shown in Fig. 5,6 and 7, wherein, a kind of active rotation roughness element for realizing turbulivity quantified controlling of embodiment 1
It is arranged in order.
A kind of application method for the active rotation roughness element for realizing turbulivity quantified controlling is provided, including, in measured point
Air velocity transducer and turbulivity sensor are set, by the feedback of turbulivity sensor, to control the rotating speed of motor, so as to obtain
Desired purpose turbulivity, measured point is in the lower part of building.It is preferred that measured point is located at the lower part of building on the right side of Fig. 7, away from ground
Face 100mm.
Flow order is as follows：Turbulivity sensor → control module → motor.
Wherein, when turbulivity is too small, control module sends signal for faster to motor；When turbulivity is excessive, mould is controlled
Block sends reduce-speed sign to motor.
Embodiment 6
As shown in Fig. 5,6 and 7, wherein, a kind of active rotation roughness element for realizing turbulivity quantified controlling of embodiment 2
It is arranged in order.
A kind of application method for the active rotation roughness element for realizing turbulivity quantified controlling is provided, including, in measured point
Air velocity transducer and turbulivity sensor are set, by the feedback of turbulivity sensor, to control the rotating speed of motor, so as to obtain
Desired purpose turbulivity, measured point is in the lower part of building.It is preferred that measured point is located at the lower part of building on the right side of Fig. 7, away from ground
Face 100mm.
Flow order is as follows：Turbulivity sensor → control module → motor.
Wherein, when turbulivity is too small, control module sends signal for faster to motor；When turbulivity is excessive, mould is controlled
Block sends reduce-speed sign to motor.
Summarize：The curvature and length of fan blade can be adjusted by foregoing active rotation roughness element, obtains difference
The building lower part turbulence intensity of degree.
Above content is to combine the further details of explanation that specific preferred embodiment is the present invention, but not
Represent that the specific implementation of the present invention is limited to these explanations.For the those of ordinary skill that neck is restrained belonging to the present invention,
Without departing from the inventive concept of the premise, some simple deductions can also be made or replaced, be regarded as belonging to the present invention
Protection domain.
Claims (9)
1. a kind of active rotation roughness element for realizing turbulivity quantified controlling, it is characterised in that including bearing and top
Part, bearing and top component respectively by rotation axis vertical connection, wherein, three curved fan leafs are uniformly arranged in rotation axis
Piece, the top of fan blade are connected with top component, and the top of fan blade and bearing leave gap.
A kind of 2. active rotation roughness element for realizing turbulivity quantified controlling according to claim 1, it is characterised in that
The height ratio of height of roughness element and fan blade is 10：7.
A kind of 3. active rotation roughness element for realizing turbulivity quantified controlling according to claim 1, it is characterised in that
The high 100mm of roughness element, wherein the height of three curved fan blade is 70mm, bottom support bracket thickness is 20mm, blade and branch
The gap of seat is 10mm.
A kind of 4. active rotation roughness element for realizing turbulivity quantified controlling according to claim 1, it is characterised in that
Blade edge is 40mm, a diameter of 20mm of rotation axis from rotation axis edge；Bearing is the cylinder of an a diameter of 100mm, interior
Portion is connected with motor, is controlled by motor, is fan blade powered rotation, and top component is an a diameter of 100mm, thickness
For the circular cover of 5mm.
A kind of 5. active rotation roughness element for realizing turbulivity quantified controlling according to claim 1, it is characterised in that
The material of top rotation axis and fan blade is the PVC material of lightweight；Lower seat is wooden or metal material.
A kind of 6. application method for the active rotation roughness element for realizing turbulivity quantified controlling, it is characterised in that usage right
It is required that the roughness element described in 1-5 any claims, including, air velocity transducer and turbulivity sensor are set in measured point, led to
The feedback of turbulivity sensor is crossed, to control the rotating speed of motor, so as to obtain desired purpose turbulivity, measured point is in building
Lower part.
7. a kind of application method of active rotation roughness element for realizing turbulivity quantified controlling according to claim 6,
It is characterized in that, flow order is as follows：Turbulivity sensor → control module → motor.
8. a kind of application method of active rotation roughness element for realizing turbulivity quantified controlling according to claim 6,
It is characterized in that, when turbulivity is too small, control module sends signal for faster to motor；When turbulivity is excessive, control module
Reduce-speed sign is sent to motor.
9. a kind of application method of active rotation roughness element for realizing turbulivity quantified controlling according to claim 6,
Measured point is located at the lower part of building, away from ground 100mm.
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| CN105675248B true CN105675248B (en) | 2018-05-11 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101377447A (en) * | 2008-09-12 | 2009-03-04 | 北京大学 | Rough element apparatus with variable rotary-out type wind tunnel |
| CN203376138U (en) * | 2013-05-16 | 2014-01-01 | 上海交通大学 | Automatic elevating roughness element apparatus for boundary layer wind tunnel |
| CN204788886U (en) * | 2015-07-30 | 2015-11-18 | 湖南科技大学 | Portable coarse first device of wind -tunnel |
| CN204882029U (en) * | 2015-08-07 | 2015-12-16 | 湖南科技大学 | Large scale and high turbulent wind field arrangement structure |
| CN205538150U (en) * | 2016-01-29 | 2016-08-31 | 哈尔滨工业大学深圳研究生院 | Rotatory coarse unit of active type of reinforcing wind tunnel test turbulence scale |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0619303B2 (en) * | 1989-05-27 | 1994-03-16 | 川崎重工業株式会社 | Wind tunnel wind speed controller |
| WO2009117131A1 (en) * | 2008-03-20 | 2009-09-24 | Environmental Products Of Minnesota | Vertical axis turbine to generate wind power |
-
2016
- 2016-01-29 CN CN201610067543.4A patent/CN105675248B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101377447A (en) * | 2008-09-12 | 2009-03-04 | 北京大学 | Rough element apparatus with variable rotary-out type wind tunnel |
| CN203376138U (en) * | 2013-05-16 | 2014-01-01 | 上海交通大学 | Automatic elevating roughness element apparatus for boundary layer wind tunnel |
| CN204788886U (en) * | 2015-07-30 | 2015-11-18 | 湖南科技大学 | Portable coarse first device of wind -tunnel |
| CN204882029U (en) * | 2015-08-07 | 2015-12-16 | 湖南科技大学 | Large scale and high turbulent wind field arrangement structure |
| CN205538150U (en) * | 2016-01-29 | 2016-08-31 | 哈尔滨工业大学深圳研究生院 | Rotatory coarse unit of active type of reinforcing wind tunnel test turbulence scale |
Non-Patent Citations (1)
| Title |
|---|
| 平板微通道流动传热的粗糙元间距效应;云和明 等;《机械设计与制造》;20130531(第5期);117-119 * |
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