CN107860553A - A kind of wind and snow environmental wind tunnel analogue means - Google Patents
A kind of wind and snow environmental wind tunnel analogue means Download PDFInfo
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- CN107860553A CN107860553A CN201711093083.3A CN201711093083A CN107860553A CN 107860553 A CN107860553 A CN 107860553A CN 201711093083 A CN201711093083 A CN 201711093083A CN 107860553 A CN107860553 A CN 107860553A
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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
- G01M9/08—Aerodynamic models
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Abstract
The invention discloses a kind of wind and snow environmental wind tunnel analogue means, applies in environmental wind tunnel analogue means field, including power section, snowflake segment occurred and the test section being sequentially arranged, and blower fan is provided with power section；Snowflake segment occurred inner circumferential is provided with some liquid nitrogen sprays and sprinkler head, and liquid nitrogen spray is connected by liquid nitrogen pipeline with liquid nitrogen source, and sprinkler head is connected by water lines with pressure water source；With being equipped with the first air pipe and the second air pipe communicated therewith respectively on the outside of water lines, first air pipe and the second air pipe are connected liquid nitrogen pipeline with pressure gas source；The turntable of carrying experimental model is provided with the test section.Current building and bridge wind-tunnel, the complex environment that snowflake floats down on the wind when being still unable to the process of snowfall simulation and blowing, wind and snow synergy can not be tested to building or bridge structure wind force distribution, the influence of wind vibration response.The present invention can solve the above problems, and realize stable output and the flexible modulation of wind and snow environment.
Description
Technical field
The invention belongs to environmental wind tunnel analogue means field, and in particular to a kind of wind and snow environmental wind tunnel analogue means.
Background technology
Wind and snow collective effect can cause the uneven distribution of such as large-span structure roof system accumulated snow, it is easy to cause structure partial
Unstability proposes rational wind resistance snow design method so as to cause total collapse to destroy, and improves structure in drifting snow hazard
Security, there is great practical significance and theory value.The wind tunnel test system of wind and snow environment can be currently simulated due to lacking
System, the correlative study in the current field is caused to be only limitted to the numerical simulation analysis based on classical assumption, its shortcoming is due to lack
The checking and contrast of experiment so that the reliability and accuracy of method for numerical simulation need to be discussed, while also limit numerical value
The development of analogy method.
Wind tunnel test system is divided into two classes, return circuit wind tunnel and direct- action wind tunnel at this stage.Return circuit wind tunnel, which has, to be set
Count that wind speed is high, Flow Field Performance is good, saves the advantages that energy resource consumption, but should not be avenged, the complex environment simulation such as mist, sand；Direct current
Type wind-tunnel, it is typically designed wind speed and is slightly below reflow type, energy resource consumption is higher than reflow type, but can be on the downstream tests section ground of blower fan
Spread the distribution situation of husky or snow, research wind sand or snow.But current building and bridge wind-tunnel, still it is unable to the mistake of snowfall simulation
Journey and the complex environment that snowflake floats down on the wind when blowing, wind and snow synergy can not be tested to building or bridge structure blast
Distribution, the influence of wind vibration response.
The content of the invention
In view of this, it is an object of the invention to provide a kind of wind and snow environmental wind tunnel analogue means, to test wind and snow environment
Under to building or bridge structure influence.
To reach above-mentioned purpose, the present invention provides following technical scheme：
A kind of wind and snow environmental wind tunnel analogue means, including power section, snowflake segment occurred and the test section being sequentially arranged, it is described
Blower fan is provided with power section；The snowflake segment occurred inner circumferential is provided with some liquid nitrogen sprays and sprinkler head, and the liquid nitrogen spray leads to
Cross liquid nitrogen pipeline to be connected with liquid nitrogen source, the sprinkler head is connected by water lines with pressure water source；The liquid nitrogen pipeline and water pipe
The first air pipe and the second air pipe communicated therewith is equipped with respectively on the outside of road, and first air pipe and the second air pipe are equal
It is connected with pressure gas source；The turntable of carrying experimental model is provided with the test section.
Preferably, in addition to the diffuser and stable section that are sequentially arranged between power section and snowflake segment occurred；The expansion
Scattered section internal diameter is gradually extended to identical with stable section internal diameter along air intake direction；The stable section internal diameter and snowflake segment occurred internal diameter phase
Together.
Preferably, the diffuser and horizontal line angle α are 10~20 degree.
Preferably, in addition to the mixing contraction section that is arranged between snowflake segment occurred and test section；The mixing contraction section
Internal diameter is gradually reduced to identical with test section internal diameter along air intake direction.
Preferably, the mixing contraction section and horizontal line angle β are 30~45 degree.
Preferably, deflector is provided between the test section entrance and turntable, the blade of the deflector is in elongated water chestnut
Shape.
Preferably, the water lines outer surface is equipped with muff.
Preferably, the liquid nitrogen spray and sprinkler head are step-by-step arrangement or staggeredly mixed-arrangement in snowflake segment occurred.
Preferably, the test section porch is provided with temperature air volume test device.
Preferably, the blower fan is provided with wind control valve；The liquid nitrogen source, pressure water source, pressure gas source outlet punishment
She You not liquid nitrogen control valve, water source control valve and air source control valve.
The beneficial effects of the present invention are：
1st, the present invention can be achieved to simulate and test the influence to building or bridge structure under wind and snow environment.
2nd, the liquid nitrogen spray and sprinkler head that the present invention uses are circumferentially disposed, and the filling composite rate of snowflake is produced in wind-tunnel
Higher, the ability for manufacturing high-volume snowflake is more preferable.
3rd, the turntable that the present invention uses can make experimental model 360 degrees omnidirection receive the test of wind and snow environment, make simulation
As a result it is more comprehensively true.
4th, diffuser, stable section and the mixing contraction section that the present invention uses can make air-flow and wind speed more stable.
5th, the temperature air volume test device and multiple control valves that the present invention uses, can be achieved to wind and snow flow and the tune of temperature
Control, according to the functional need of experimenter, the condition value for setting wind-tunnel input environment is more flexible.
Brief description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below and carried out
Explanation：
Fig. 1 is overall structure diagram of the present invention.
Marked in accompanying drawing as follows：Power section 1, blower fan 11, wind control valve 111, snowflake segment occurred 2, liquid nitrogen spray 21, water
Shower nozzle 22, liquid nitrogen pipeline 23, liquid nitrogen source 24, liquid nitrogen control valve 241, water lines 25, muff 251, pressure water source 26, water source control
Valve 261 processed, the first air pipe 27, the second air pipe 28, pressure gas source 29, air source control valve 291, test section 3, experimental model
31st, turntable 32, deflector 33, temperature air volume test device 34, diffuser 4, stable section 5, mixing contraction section 6.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
A kind of wind and snow environmental wind tunnel analogue means, including power section 1, snowflake segment occurred 2 and the test section 3 being sequentially arranged,
Blower fan 11 is provided with the power section 1；The inner circumferential step-by-step arrangement of snowflake segment occurred 2 is provided with some liquid nitrogen sprays 21 and water sprays
First 22, the liquid nitrogen spray 21 is connected by liquid nitrogen pipeline 23 with liquid nitrogen source 24, and the sprinkler head 22 passes through water lines 25 and pressure
Power water source 26 connects；The outside of the liquid nitrogen pipeline 23 and water lines 25 is equipped with the first air pipe 27 for communicating therewith and the respectively
Two air pipes 28, the first air pipe 27 of institute and the second air pipe 28 are connected with pressure gas source 29；It is provided with and holds in the test section 3
Carry the turntable 32 of experimental model 31.
The service condition of the present invention is as follows：First experimental model 31 is positioned on turntable 32, opens the wind in power section 1
Machine 11, stable air-flow is formed in wind-tunnel, liquid nitrogen and water are delivered to liquid nitrogen spray through liquid nitrogen pipeline 23 and water lines 25 respectively
21 and sprinkler head 22 at, and respectively the first air pipe 27 and the second air pipe 28 conveying come gases at high pressure progradation
Under, sprayed to the central area of snowflake segment occurred 2, because liquid nitrogen spray 21 and sprinkler head 22 are circumferentially disposed, snow is produced in wind-tunnel
Colored filling composite rate is higher, and the ability for manufacturing high-volume snowflake is more preferable.Liquid nitrogen rapid vaporization absorbs heat, temperature in snowflake segment occurred
Rapid to reduce, then condensation cured is snowflake to water, test section 3 is moved forward under the drive of air-flow, experimental model 31 is rotating
Under the rotation of platform 32 drives, can 360 degrees omnidirection receive the test of wind and snow environment, make analog result more comprehensively true.Certainly,
Those skilled in the art can also close the spinfunction of turntable 32, property of a test experiments model one side under wind and snow environment
Energy.
In another embodiment, in addition to the diffuser 4 that is sequentially arranged between power section 1 and snowflake segment occurred 2 and steady
Determine section 5；The internal diameter of diffuser 4 is gradually extended to identical with the internal diameter of stable section 5 along air intake direction；The internal diameter of stable section 5 with
The internal diameter of snowflake segment occurred 2 is identical.Diffuser 4 can enable blower fan adopt into high speed and high pressure air-flow be suitably depressured, stable section 5 can be protected
Card makes air quantity wind speed stability more preferable into the steady air current of snowflake segment occurred 2.Wherein diffuser 4 and horizontal line angle α are 10
~20 degree, verified through model, in the angular range, the air quantity wind speed of air-flow is more stable.There are preferably 15 degree herein.
Further, the present embodiment also includes the mixing contraction section 6 being arranged between snowflake segment occurred 2 and test section 3；Institute
The mixing internal diameter of contraction section 6 is stated to be gradually reduced to identical with the internal diameter of test section 3 along air intake direction.Mixing contraction section 6 can make liquid nitrogen with
Water act on to be formed snowflake process it is more stable, while also make the mixing of snowflake and air-flow more uniform, be delivered to the wind of test section
Snow also can suitably pressurize under the mixing contraction section effect that internal diameter reduces, and make the more powerful concentration of wind and snow.Wherein mix contraction section 6
It is 30~45 degree with horizontal line angle β, is verified through model, in the angular range, the air quantity wind speed of air-flow is more stable.Have herein
Preferably 30 degree.
In another embodiment, deflector 33, the leaf of the deflector 33 are provided between the entrance of test section 3 and turntable 32
Piece is in elongated diamond shaped.Deflector can make experimenter select wind and snow to act on the direction of experimental model, and be arranged to elongated water chestnut
Shape, windage is smaller, and water conservancy diversion effect is more preferable.
In another embodiment, the outer surface of water lines 25 is equipped with muff 251.Because sprinkler head 22 is by the shadow of cold airflow
Sound is in extremely low temperature environment, and water body in sprinkler head may be caused to condense, block shower nozzle.To prevent this phenomenon from occurring, in water
Pipeline outer surface is equipped with muff, and the water body in water lines is incubated, and the water temperature that shower nozzle sprays is unlikely to too low, from
And ensure that sprinkler head is unimpeded.
In another embodiment, liquid nitrogen spray 21 and sprinkler head 22 are in the interior staggeredly mixed-arrangement of snowflake segment occurred 2.The arrangement
Mode can be such that liquid nitrogen is mixed with water evenly, and caused snowflower particle is also more stable.
In another embodiment, the porch of test section 3 is provided with temperature air volume test device 34, wind and snow in its detectable wind-tunnel
Temperature and air force, further, blower fan 11 are provided with wind control valve 111；The liquid nitrogen source 24, pressure water source 26, pressure
The exit of strength source 29 is respectively equipped with liquid nitrogen control valve 241, water source control valve 261 and air source control valve 291.It can be controlled by outside
Processor processed obtains the measurement data of temperature air volume test device 34, and manually or automatically regulates and controls wind control valve 111, liquid nitrogen control
Valve 241, water source control valve 261 and air source control valve 291, the regulation and control to wind and snow flow and temperature are realized, temperature is by adjusting water
Source temperature realizes that, according to the functional need of experimenter, the condition value for setting wind-tunnel input environment is more flexible.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (10)
1. a kind of wind and snow environmental wind tunnel analogue means, including power section, snowflake segment occurred and the test section being sequentially arranged, its feature
It is：Blower fan is provided with the power section；The snowflake segment occurred inner circumferential is provided with some liquid nitrogen sprays and sprinkler head, the liquid
Nitrogen shower nozzle is connected by liquid nitrogen pipeline with liquid nitrogen source, and the sprinkler head is connected by water lines with pressure water source；The liquid nitrogen pipe
Road with being equipped with the first air pipe and the second air pipe communicated therewith, first air pipe and second respectively on the outside of water lines
Air pipe is connected with pressure gas source；The turntable of carrying experimental model is provided with the test section.
2. wind and snow environment simulator according to claim 1, it is characterised in that：Also include being sequentially arranged in power section and
Diffuser and stable section between snowflake segment occurred；The diffuser internal diameter is gradually extended to and stable section internal diameter along air intake direction
It is identical；The stable section internal diameter is identical with snowflake segment occurred internal diameter.
3. wind and snow environment simulator according to claim 2, it is characterised in that：The diffuser and horizontal line angle α
For 10~20 degree.
4. wind and snow environment simulator according to claim 1, it is characterised in that：Also include be arranged on snowflake segment occurred and
Mixing contraction section between test section；It is described mixing contraction section internal diameter along air intake direction be gradually reduced to test section internal diameter phase
Together.
5. wind and snow environment simulator according to claim 4, it is characterised in that：The mixing contraction section and horizontal wire clamp
Angle beta is 30~45 degree.
6. wind and snow environment simulator according to claim 1, it is characterised in that：The test section entrance and turntable it
Between be provided with deflector, the blade of the deflector is in elongated diamond shaped.
7. wind and snow environment simulator according to claim 1, it is characterised in that：The water lines outer surface is equipped with guarantor
Temperature set.
8. wind and snow environment simulator according to claim 1, it is characterised in that：The liquid nitrogen spray and sprinkler head are being avenged
It is step-by-step arrangement or staggeredly mixed-arrangement in flower segment occurred.
9. wind and snow environment simulator according to claim 1, it is characterised in that：The test section porch is provided with temperature
Air volume test device.
10. wind and snow environment simulator according to claim 9, it is characterised in that：The blower fan is provided with wind control
Valve；The liquid nitrogen source, pressure water source, pressure gas source exit are respectively equipped with liquid nitrogen control valve, water source control valve and source of the gas control
Valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711093083.3A CN107860553A (en) | 2017-11-08 | 2017-11-08 | A kind of wind and snow environmental wind tunnel analogue means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711093083.3A CN107860553A (en) | 2017-11-08 | 2017-11-08 | A kind of wind and snow environmental wind tunnel analogue means |
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| Publication Number | Publication Date |
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| CN107860553A true CN107860553A (en) | 2018-03-30 |
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| CN201711093083.3A Pending CN107860553A (en) | 2017-11-08 | 2017-11-08 | A kind of wind and snow environmental wind tunnel analogue means |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006619A (en) * | 2019-05-23 | 2019-07-12 | 重庆大学 | A kind of multi-function windtunnel for simulating disaster-ridden evil coupling |
| CN113029611A (en) * | 2021-04-14 | 2021-06-25 | 中南大学 | Snow making device of bogie snow icing wind tunnel test system |
| CN113029610A (en) * | 2021-04-14 | 2021-06-25 | 中南大学 | Snow accumulation and icing wind tunnel test system and test method for railway train bogie |
| CN113405977A (en) * | 2021-06-16 | 2021-09-17 | 哈尔滨工业大学 | A test device for sleet load coupling simulation |
| CN115901162A (en) * | 2023-03-02 | 2023-04-04 | 中国电建集团西北勘测设计研究院有限公司 | Wind and snow environment wind tunnel simulation device for green development of urban and rural construction |
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| 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 |
| CN104614146A (en) * | 2015-01-28 | 2015-05-13 | 天津大学 | Low-energy-consumption efficient wind tunnel capable of simulating snowfall process |
| CN104634536A (en) * | 2015-01-28 | 2015-05-20 | 天津大学 | Economic and efficient opening direct current type ice wind tunnel |
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2017
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN104614146A (en) * | 2015-01-28 | 2015-05-13 | 天津大学 | Low-energy-consumption efficient wind tunnel capable of simulating snowfall process |
| CN104634536A (en) * | 2015-01-28 | 2015-05-20 | 天津大学 | Economic and efficient opening direct current type ice wind tunnel |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006619A (en) * | 2019-05-23 | 2019-07-12 | 重庆大学 | A kind of multi-function windtunnel for simulating disaster-ridden evil coupling |
| CN110006619B (en) * | 2019-05-23 | 2023-12-08 | 重庆大学 | Multifunctional wind tunnel simulating multi-disaster coupling |
| CN113029611A (en) * | 2021-04-14 | 2021-06-25 | 中南大学 | Snow making device of bogie snow icing wind tunnel test system |
| CN113029610A (en) * | 2021-04-14 | 2021-06-25 | 中南大学 | Snow accumulation and icing wind tunnel test system and test method for railway train bogie |
| CN113029610B (en) * | 2021-04-14 | 2022-05-27 | 中南大学 | Snow accumulation and icing wind tunnel test system and test method for railway train bogie |
| CN113405977A (en) * | 2021-06-16 | 2021-09-17 | 哈尔滨工业大学 | A test device for sleet load coupling simulation |
| CN115901162A (en) * | 2023-03-02 | 2023-04-04 | 中国电建集团西北勘测设计研究院有限公司 | Wind and snow environment wind tunnel simulation device for green development of urban and rural construction |
| CN115901162B (en) * | 2023-03-02 | 2023-06-13 | 中国电建集团西北勘测设计研究院有限公司 | Wind and snow environment wind tunnel simulation device |
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Application publication date: 20180330 |