CN105628332A - Device for adjusting boundary layer wind tunnel test bottom turbulence degree by changing cylinder rotation speed - Google Patents
Device for adjusting boundary layer wind tunnel test bottom turbulence degree by changing cylinder rotation speed Download PDFInfo
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- CN105628332A CN105628332A CN201610178263.0A CN201610178263A CN105628332A CN 105628332 A CN105628332 A CN 105628332A CN 201610178263 A CN201610178263 A CN 201610178263A CN 105628332 A CN105628332 A CN 105628332A
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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
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Abstract
The invention relates to a device for adjusting boundary layer wind tunnel test bottom turbulence degree by changing cylinder rotation speed and a real-time adjustment and control system. The device is arranged at two sides of a wedge. The turbulence degree of a wind field is inducted through a turbulence degree sensor arranged on a measuring point of a measured body; when the turbulence degree is too small or too large, a control module arranged on a rotatable cylinder device is utilized to send signals to a motor; the motor performs corresponding adjustment according to the signals, and as a result, the rotation speed of the cylinder can be changed; when the turbulence degree reaches a preset value, the control module sends corresponding signals to the motor, and at this moment, the motor keeps power unchanged, the cylinder keeps rotation speed unchanged, the boundary layer wind tunnel bottom turbulence degree keeps unchanged, and experimental personnel begin to perform corresponding wind tunnel tests.
Description
Technical field
The present invention is applied to hydromeehanics experimental technique field, in particular to the device and the turbulivity regulate and control method that regulate turbulivity bottom the wind1 tunnel trial of frictional belt by changing cylinder rotating speed, can effectively increase turbulivity bottom wind field, thus improve the accuracy of results of wind tunnel.
Background technology
Wind1 tunnel trial is one of current main means studied by wind sensitive structure. The accuracy of results of wind tunnel directly has influence on the accurate assurance to structure properties. Affecting a lot of because have of results of wind tunnel, wherein bottom wind-tunnel, turbulence intensity is a principal element. Currently the simulation deficiency of turbulivity bottom wind-tunnel is caused results of wind tunnel not accurately, even can restrict the generally application of this test method. Current main employing is laid point and is split and atmospheric boundary layer to simulate in wind1 tunnel trial of the technology of roughness element.
Bottom actual atmospheric boundary layer, wind velocity gradient is big, and wind field is more complicated, and turbulivity and turbulence integral scale are also relatively big, and currently arrange that the method that roughness element and point are split is very limited for increasing the turbulivity effect bottom wind field, it is very difficult to meet actual tests requirement.
On the one hand, adopting the method laying roughness element, the amplitude that turbulivity bottom wind field strengthened is not very big, and controllability is not strong; On the other hand, adopt and increase the mode that point splits bottom width, although the turbulivity bottom wind field can suitably be strengthened, but the restriction due to tunnel size, its effect is very limited. Also having scholar to adopt vibration point to split and wait initiatively analog system, but its control difficulty is greatly, cost is higher, is therefore difficult to be promoted.
CN103713153A discloses a kind of the new detector for measuring body structure surface wind speed in wind1 tunnel trial, it is characterized in that: comprise hollow circular cylindrical shell (3), in the long pressure pipe (1) of 90 degree of bendings, described circular cylindrical shell (3) upper end and lower end are respectively arranged with the circular upper plate (2) and bottom plate (4) that seal its hollow outlet, described upper end plate (2) and bottom plate (4) center are provided with centre hole, and described upper end plate (2) edge along upper end plate (2) concentric(al) circles uniformly be provided with gather hole (7), described circular cylindrical shell (3) lower end is close to and is provided with right cylinder (5), described circular cylindrical shell (3) sidewall horizontal is provided with the short pressure pipe (6) of straight-through circular cylindrical shell (3) hollow position, one side of described long pressure pipe (1) is arranged in the centre hole of described upper end plate (2) and bottom plate (4) with vertically wearing, the other side horizontal through and extend to outside right cylinder (5) sidewall.
CN204882029U discloses a kind of popping one's head in without wind direction and wind velocity for architectural wind environment wind1 tunnel trial, it is characterized in that: described probe is by housing (2), stifled head (3), long pressure pipe (1) and short pressure pipe (4) composition, described housing (2) is for columnar structured, its one end is for opening wide end (2a), the other end is blind end (2b), the airtight blind end (2b) being arranged on housing (2) of described stifled head (3), described long pressure pipe (1) through housing (2) open wide end (2a) and stifled head (3) after pass from the blind end (2b) of housing, its tube wall and stifled head (3) are in close contact and seal, described pressure short tube (4) is stretched into by the blind end (2b) of housing (2), through stifled head (3) and with housing inner space, its tube wall and stifled head (3) are in close contact and seal.
Prior art problem and defect comprise: the bottom turbulence intensity 1, utilizing roughness element to produce not is wind field, the bottom turbulence intensity required for can reaching us in all cases, and this turbulence intensity is difficult to regulate according to actual tests situation; 2, existing utilization point splits the mode increasing bottom turbulence intensity bigger limitation, and effect is not very obvious; 3, bottom actual wind field, turbulent eddy size is relatively big, but bottom the wind field that obtains of the method utilizing roughness element and point to split, turbulence integral scale is less than normal.
Summary of the invention
In view of the technical problem that prior art exists, the present invention is specifically related to a kind of by regulating the device of turbulivity bottom the wind1 tunnel trial of frictional belt by changing cylinder rotating speed, can effectively increase turbulivity bottom wind field, thus improve the accuracy of results of wind tunnel; On the other hand, increase bottom vortex sizes by the rotation of cylinder opposite direction, thus increase wind field, bottom turbulence integral scale in wind-tunnel, reach the effect of the actual wind field of matching better.
Specifically, the object of the present invention is achieved like this: the device regulating turbulivity bottom the wind1 tunnel trial of frictional belt by changing cylinder rotating speed, wherein, rotating cylindrical mainly comprises: base, cylinder and power set, wherein, base comprises top bottom-disc and low bottom-disc, a. top bottom-disc is connected with bearing, utilize the profile that bearing adjustable-angle is split to point of fitting, power set comprises rotator and motor, top bottom-disc center is provided with rotator, rotator top connecting cylinder, and rotator bottom is connected with motor; B. low bottom-disc plays fixing and connects power supply effect, and low bottom-disc side is provided with regulation device, and regulation device is connected with motor, and can control motor rotating speed in real time.
Wherein, described cylindrical base is provided with groove, is connected with the rotator of top bottom-disc.
Cylinder size height can need to make according to concrete test, and material is not limit, and the material that bottom is tentatively intended is plastics.
Preferred version is utilize the angle scope of the adjustable upper domain of bearing and low bottom-disc angle to be 0��75 degree.
In order to auto-control, described device comprises internal control module further, the signal that internal control module is sent by the turbulivity sensor being arranged on analyte measuring point, controls the output rating of motor, thus controls the rotating speed of rotator.
It is still another object of the present invention to provide a kind of turbulivity regulate and control method, it may also be useful to the wind1 tunnel trial device of turbulence intensity bottom aforesaid a kind of rotatable enhancing wind field.
Described method specifically comprises: this device is placed on point and splits both sides, by the turbulivity sensor being arranged on tested body examination point, the turbulivity of induction wind field, when turbulivity is less than normal or bigger than normal, the control module being arranged on Rotatable circular column device is utilized to send signal to motor, motor is made according to signal and correspondingly being adjusted, and changes the rotating speed of rotating cylindrical; When turbulivity is less than target value, increase cylinder rotating speed; When turbulivity is greater than target value, reduce cylinder rotating speed. When turbulivity is close to target value, reduce the adjustment degree of cylinder rotating speed, to obtain target turbulence degree more accurately. When reaching preset value, control module sends corresponding signal to motor, and motor now keeps power constant, and right cylinder keeps rotating speed constant, and experimenter starts to carry out corresponding wind1 tunnel trial. Clear mechanism of the present invention, therefore applicant think can in advance by a large number test obtain between right cylinder different rotating speeds and measured point turbulivity increasing amount relation, form is as shown in table. When carrying out wind1 tunnel trial, it is possible to this rotating speed is preliminary adjustment value, regulate according to feedback in real time.
Turbulivity regulates reference data (in table, data are only for reference)
Preferred version arranges a rotating cylindrical respectively for splitting both sides at each point, is given by the rotation of cylinder opposite direction and flows wind field injection moment of momentum, increases point and splits the size that bottom produces vortex, thus increases turbulence intensity.
The useful effect that the present invention plays relative to prior art, comprising:
1. relatively flexible, wide accommodation, it is possible to the point being adapted to different shapes by adjusting angle is split, by adopting cylinder, the different rotating speeds of different heights size to carry out satisfied concrete test requirements document;
2., compared to other active simulation, rotating cylindrical device cost of manufacture is low, simple to operate;
3. compared to by dynamic simulated, rotating cylindrical, by injecting the mode of angular kinetic energy, increases wind field total energy, increases eddy sizes, and effect is better;
4. can solve the problem that wind field, bottom turbulence integral scale is less than normal preferably.
Accompanying drawing explanation
Fig. 1 the present invention increases the rotatable cylinder overall schematic of the Rotatable circular column device of boundary layer wind tunnel test bottom turbulivity
Fig. 2 the present invention increases cylinder and the rotator interface chart of the Rotatable circular column device of boundary layer wind tunnel test bottom turbulivity
The rotatable cylinder of Rotatable circular column device that Fig. 3 the present invention increases boundary layer wind tunnel test bottom turbulivity is positioned at point and splits layout drawing
The rotatable cylindrical fit point of the Rotatable circular column device that Fig. 4 the present invention increases boundary layer wind tunnel test bottom turbulivity is split at experiment chamber position view
The rotatable cylindrical fit point of the Rotatable circular column device that Fig. 5 the present invention increases boundary layer wind tunnel test bottom turbulivity is split at experiment chamber position view
Fig. 6 the present invention increases the rotatable cylinder ACTIVE CONTROL schema of the Rotatable circular column device of boundary layer wind tunnel test bottom turbulivity
Fig. 7 the present invention increases a kind of concrete implementing procedure figure of the Rotatable circular column device of boundary layer wind tunnel test bottom turbulivity
Fig. 8 the present invention increases another kind of concrete implementing procedure figure of the Rotatable circular column device of boundary layer wind tunnel test bottom turbulivity
Wherein, 1 is base, and 1a is top bottom-disc, and 1b is low bottom-disc, and 1c is angular adjustment support, and 2 is cylinder, and 3 is rotator, and 4 is switch.
Specific embodiments
Below in conjunction with concrete example and accompanying drawing, the present invention is described in further detail, but the content of the present invention is not limited to embodiment.
Embodiment 1
As shown in Figure 1, 2, a kind of Rotatable circular column device increasing boundary layer wind tunnel test bottom turbulivity, it is characterised in that, wherein, rotating cylindrical mainly comprises: base, cylinder and power set, and wherein, base comprises top bottom-disc and low bottom-disc, a. top bottom-disc is connected with bearing, utilizing the profile that bearing adjustable-angle is split to point of fitting, power set comprises rotator and motor, and top bottom-disc center is provided with rotator, rotator top connecting cylinder, rotator bottom is connected with motor; B. low bottom-disc plays fixing and connects power supply effect, and low bottom-disc side is provided with regulation device, and regulation device is connected with motor, and can control motor rotating speed in real time.
Wherein, described cylindrical base is provided with groove, is connected with the rotator of top bottom-disc.
Cylinder size height can need to make according to concrete test, and material is not limit, and the material that bottom is tentatively intended is plastics.
Preferred version is utilize the angle scope of the adjustable upper domain of bearing and low bottom-disc angle to be 0��75 degree.
Embodiment 2
On the basis of embodiment 1, in order to auto-control, described device comprises internal control module further, the signal that internal control module is sent by the turbulivity sensor being arranged on analyte measuring point, control the output rating of motor, thus control the rotating speed of rotator.
Embodiment 3
As shown in 5 Fig. 3-Fig. 8, adopting the scheme of embodiment 2 to be used for turbulivity regulate and control method, concrete grammar comprises:
The wind1 tunnel trial device of turbulence intensity bottom aforesaid a kind of rotatable enhancing wind field is used to regulate and control.
Described method specifically comprises: this device is placed on point and splits both sides, by the turbulivity sensor being arranged on tested body examination point, the turbulivity of induction wind field, when turbulivity is less than normal or bigger than normal, the control module being arranged on Rotatable circular column device is utilized to send signal to motor, motor is made according to signal and correspondingly being adjusted, and changes the rotating speed of rotating cylindrical; When turbulivity is less than target value, increase cylinder rotating speed; When turbulivity is greater than target value, reduce cylinder rotating speed. When turbulivity is close to target value, reduce the adjustment degree of cylinder rotating speed, to obtain target turbulence degree more accurately. When reaching preset value, control module sends corresponding signal to motor, and motor now keeps power constant, and right cylinder keeps rotating speed constant, and experimenter starts to carry out corresponding wind1 tunnel trial.
Preferred version arranges a rotating cylindrical respectively for splitting both sides at each point, is given by the rotation of cylinder opposite direction and flows wind field injection moment of momentum, increases point and splits the size that bottom produces vortex, thus increases turbulence intensity.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations. For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, it is also possible to make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1. the device of turbulivity bottom the wind1 tunnel trial of frictional belt is regulated by changing cylinder rotating speed, it is characterized in that, wherein, rotating cylindrical mainly comprises: base, cylinder and power set, wherein, base comprises top bottom-disc and low bottom-disc, and a. top bottom-disc is connected with bearing, utilizes the profile that bearing adjustable-angle is split to point of fitting, power set comprises rotator and motor, top bottom-disc center is provided with rotator, rotator top connecting cylinder, and rotator bottom is connected with motor; B. low bottom-disc plays fixing and connects power supply effect, and low bottom-disc side is provided with regulation device, and regulation device is connected with motor, and can control motor rotating speed in real time.
2. the device regulating turbulivity bottom the wind1 tunnel trial of frictional belt by changing cylinder rotating speed according to claim 1, it is characterised in that, cylindrical base is provided with groove, is connected with the rotator of top bottom-disc.
3. according to claim, regulate the device of turbulivity bottom the wind1 tunnel trial of frictional belt by changing cylinder rotating speed, it is characterised in that, the material of cylinder is light material, it is preferable that plastics.
4. the device regulating turbulivity bottom the wind1 tunnel trial of frictional belt by changing cylinder rotating speed according to claim 1, it is characterised in that, the angle scope utilizing the adjustable upper domain of bearing and low bottom-disc angle is 0��75 degree.
5. the device regulating turbulivity bottom the wind1 tunnel trial of frictional belt by changing cylinder rotating speed according to claim 1, it is characterized in that, described device comprises internal control module further, the signal that internal control module is sent by the turbulivity sensor being arranged on analyte measuring point, control the output rating of motor, thus control the rotating speed of rotator.
6. a turbulivity regulate and control method, it is characterised in that, it may also be useful to bottom a kind of rotatable enhancing wind field described in aforementioned claim 1-5 any claim, the wind1 tunnel trial device of turbulence intensity regulates and controls.
7. a kind of turbulivity regulate and control method according to claim 6, it is characterized in that, this device is placed on point and splits both sides, by the turbulivity sensor being arranged on tested body examination point, the turbulivity of induction wind field, when turbulivity is less than normal or bigger than normal, utilizes the control module being arranged on Rotatable circular column device to send signal to motor, motor is made according to signal and correspondingly being adjusted, and changes the rotating speed of rotating cylindrical; When turbulivity reaches preset value, control module sends corresponding signal to motor, and motor now keeps power constant, and right cylinder keeps rotating speed constant, and experimenter starts to carry out corresponding wind1 tunnel trial.
8. a kind of turbulivity regulate and control method according to claim 7, it is characterized in that, split both sides at each point and a rotating cylindrical is set respectively, inject moment of momentum by the rotation of cylinder opposite direction to wind field wake flow, increase turbulence intensity, also increase the eddy sizes that point is split bottom and produced simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610178263.0A CN105628332B (en) | 2016-03-25 | 2016-03-25 | The device that boundary layer wind tunnel tests bottom turbulivity is adjusted by changing cylinder rotating speed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610178263.0A CN105628332B (en) | 2016-03-25 | 2016-03-25 | The device that boundary layer wind tunnel tests bottom turbulivity is adjusted by changing cylinder rotating speed |
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| CN105628332A true CN105628332A (en) | 2016-06-01 |
| CN105628332B CN105628332B (en) | 2018-03-27 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106872140A (en) * | 2017-03-06 | 2017-06-20 | 西北工业大学 | The method that different wind speed downstream turbulivitys are measured based on cylinder model |
| CN109827740A (en) * | 2019-04-02 | 2019-05-31 | 重庆科技学院 | Wind tunnel test multiple spot adjustable type disturbing flow device |
| CN109827739A (en) * | 2019-04-02 | 2019-05-31 | 重庆科技学院 | Wind tunnel test is stretched disturbing flow device |
| CN110108436A (en) * | 2019-03-22 | 2019-08-09 | 上海渤元信息科技有限公司 | A kind of automobile frame aerodynamics pilot system and test method |
| CN112033634A (en) * | 2020-09-30 | 2020-12-04 | 重庆大学 | Flow guide device for deflection wind field of wind tunnel test |
| CN113884272A (en) * | 2021-08-30 | 2022-01-04 | 华北电力大学 | Wind tunnel test device and method for simulating multi-scale turbulence structure of atmospheric boundary layer |
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| CN103713153A (en) * | 2013-12-16 | 2014-04-09 | 华南理工大学 | Novel probe for measuring structure surface wind speed in wind tunnel test |
| CN103900786A (en) * | 2014-04-04 | 2014-07-02 | 中国科学院寒区旱区环境与工程研究所 | Sand wind environment wind tunnel experiment model device for simulating different field wind directions |
| CN204882029U (en) * | 2015-08-07 | 2015-12-16 | 湖南科技大学 | Large scale and high turbulent wind field arrangement structure |
| CN205719470U (en) * | 2016-03-25 | 2016-11-23 | 哈尔滨工业大学深圳研究生院 | A kind of increase boundary layer wind tunnel test in bottom turbulivity rotatable cylinder arrangement |
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- 2016-03-25 CN CN201610178263.0A patent/CN105628332B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20120057974A1 (en) * | 2007-12-10 | 2012-03-08 | Freda Robert M | Wind power nozzle with increased throughput |
| CN103713153A (en) * | 2013-12-16 | 2014-04-09 | 华南理工大学 | Novel probe for measuring structure surface wind speed in wind tunnel test |
| CN103900786A (en) * | 2014-04-04 | 2014-07-02 | 中国科学院寒区旱区环境与工程研究所 | Sand wind environment wind tunnel experiment model device for simulating different field wind directions |
| CN204882029U (en) * | 2015-08-07 | 2015-12-16 | 湖南科技大学 | Large scale and high turbulent wind field arrangement structure |
| CN205719470U (en) * | 2016-03-25 | 2016-11-23 | 哈尔滨工业大学深圳研究生院 | A kind of increase boundary layer wind tunnel test in bottom turbulivity rotatable cylinder arrangement |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872140A (en) * | 2017-03-06 | 2017-06-20 | 西北工业大学 | The method that different wind speed downstream turbulivitys are measured based on cylinder model |
| CN110108436A (en) * | 2019-03-22 | 2019-08-09 | 上海渤元信息科技有限公司 | A kind of automobile frame aerodynamics pilot system and test method |
| CN110108436B (en) * | 2019-03-22 | 2021-01-19 | 上海渤元信息科技有限公司 | Aerodynamic test system and test method for automobile frame |
| CN109827740A (en) * | 2019-04-02 | 2019-05-31 | 重庆科技学院 | Wind tunnel test multiple spot adjustable type disturbing flow device |
| CN109827739A (en) * | 2019-04-02 | 2019-05-31 | 重庆科技学院 | Wind tunnel test is stretched disturbing flow device |
| CN112033634A (en) * | 2020-09-30 | 2020-12-04 | 重庆大学 | Flow guide device for deflection wind field of wind tunnel test |
| CN113884272A (en) * | 2021-08-30 | 2022-01-04 | 华北电力大学 | Wind tunnel test device and method for simulating multi-scale turbulence structure of atmospheric boundary layer |
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