CN104614145A - Green environment-friendly energy-saving wind tunnel capable of simulating snowfall process - Google Patents
Green environment-friendly energy-saving wind tunnel capable of simulating snowfall process Download PDFInfo
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- CN104614145A CN104614145A CN201510044247.8A CN201510044247A CN104614145A CN 104614145 A CN104614145 A CN 104614145A CN 201510044247 A CN201510044247 A CN 201510044247A CN 104614145 A CN104614145 A CN 104614145A
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Abstract
The invention discloses a green environment-friendly energy-saving wind tunnel capable of simulating a snowfall process. The green environment-friendly energy-saving wind tunnel comprises a gas inlet, a power section, a diffusion section, a stable section, a refrigeration section, a water mist generating section and a test section which are connected in sequence, wherein a fan is mounted in the power section; a liquid nitrogen spray head is arranged in the refrigeration section, and connected with a liquid nitrogen source to form a liquid nitrogen refrigeration system through a liquid nitrogen pipeline; an atomizing pneumatic spray nozzle is arranged on the upper part of the water mist generating section, the atomizing pneumatic spray nozzle is connected with a pressure gas source and a pressure water source; a splitter plate is arranged below the atomizing pneumatic spray nozzle; a pitching angle of the splitter plate is adjustable. The green environment-friendly energy-saving wind tunnel can be used for accurately simulating wind and snow motion effect of an actual snowfall process to a large-span space structure, and has the advantages of being green and environment-friendly, low in energy consumption, high in efficiency, simple in structure, low in manufacturing cost, and low in operation and maintenance charge in comparison with a large-scale ice wind tunnel.
Description
Technical field
The present invention relates to a kind of environment protecting and power-saving wind-tunnel of energy snowfall simulation process, can be used for structural engineering field large-span space structure by the simulation of wind and snow two-phase flow coupling and the simulation of large-span space structure roof system and the drift of surrounding charming appearance and behaviour accumulated snow thereof of considering snowfall.
Background technology
Be that the climate change of principal character causes the extreme disasters weather such as high wind, severe snow of even meeting for 100 years for 50 years frequently to occur with global warming, cause wind and snow coupling load extremal intensity to strengthen.On the other hand, the future development such as large-span space structure is complicated to lightweight, growing up, build, roofing transparence, causes it more responsive for wind and snow load effect.In recent years, wind and snow load coupling and the roof system accumulated snow load uneven distribution caused thus cause large-span space structure cave-in accident to happen occasionally, and cause serious casualties, economic loss and severe social influence.From the nineties in last century, the relevant wind and snow coupling that the developed country such as the U.S., Japan takes the lead in having carried out, the research of charming appearance and behaviour accumulated snow drift.At present, some colleges and universities of China and scientific research institution have also progressively carried out research in this respect.Wherein, wind tunnel test is one of important method of carrying out this area research.Wind tunnel test, by the similarity relation between model and prototype, makes wind blown snow movement be reappeared in the laboratory that condition is controlled.Meanwhile, different parameters can be set in the lab, be conducive to disclosing Changing Pattern inherent between physical quantity.Current the carried out wind blown snow movement experimental study of China mainly employing two kinds of methods, a kind of method replaces snow grain to test in conventional wind-tunnel with simulation medium.But because snow grain diameter is less, lighter in weight, be difficult to find the suitable media meeting various similarity criterion, therefore need optionally to accept or reject similarity criterion, cause test condition and actual wind blown snow movement conditional likelihood degree low, and this test method is difficult to simulate the impact of wind blown snow movement by snowfall usually, makes the result of wind tunnel test and actual observation result greatly differ from each other.Another kind method adopts the large-scale icing tunnel laboratory that can generate crystal ice granule flowing gas to test.Large-scale icing tunnel laboratory adopts large-scale refrigeration plant to generate cryogenic gas, thus the particle water that air-blast atomizer is sprayed is converted into ice particle.But this type of icing tunnel involves great expense, operation and maintenance cost is also very high, and the large-scale refrigeration be equipped with and atomization plant power greatly, cause icing mnncl tcst to become expense, the energy and all consume very large pilot project, generally be used for industrial experimentation, common scientific research and testing are difficult to bear.And the large-scale icing mnncl tcst cycle is longer, usually need time a couple of days to reach required wind blown snow movement environment, this increases the time cost carrying out scientific research and testing further.
To sum up, research and develop a kind of wind blown snow movement environment considering actual snowfall compared with accurate simulation, energy resource consumption can be reduced simultaneously, improve the wind-tunnel pole of test efficiency and be necessary.
Summary of the invention
The present invention for solve in known technology the technical matters that exists and provide a kind of can the environment protecting and power-saving wind-tunnel of snowfall simulation process, this wind-tunnel can carry out the simulation of large-span space structure by the wind blown snow movement effect of the actual snowfall of consideration more exactly in the environment of cold, simultaneously compared to existing large-scale icing tunnel, have that test energy consumption is low, efficiency is high, simple structure, cost are low, run, the advantage of the low and environmental protection of maintenance cost.
The technical scheme that the present invention takes for the technical matters existed in solution known technology is: a kind of environment protecting and power-saving wind-tunnel of energy snowfall simulation process, this wind-tunnel adopts opening single flow, comprises the air intake opening, power section, diffuser, stable section, water smoke generation section and the test section that connect successively; Described air intake opening is disposed in the outdoor; In described power section, blower fan is installed; The top generated in section at described water smoke is provided with atomization air-blast atomizer, and described atomization air-blast atomizer is provided with air intake opening and water inlet, and described air intake opening is connected with pressure gas source by pressed gas pipeline, and described water inlet is connected with pressure water source by pressure water line; Spreader plate is provided with in the below of described atomization air-blast atomizer, described spreader plate is positioned at the middle and upper part that described water smoke generates section, the both sides, middle part of described spreader plate are equipped with the side walls hinged bearing pin generating section with described water smoke, and the both sides, front and rear part of described spreader plate are equipped with the register pin of the sidewall grafting generating section with described water smoke.
This wind-tunnel also comprises turn section, and the import of described turn section extends to outdoor and is connected with described air intake opening, and the outlet of described turn section extends to indoor and is connected with the import of described power section.
Described pressure water line is provided with Heat preservation equipment.
The exit generating section at described water smoke is provided with temperature and flow measurement device.
In the exit of described pressure water source, pressure water source valve is installed.
In the exit of described pressure gas source, pressure gas source valve is installed.
The advantage that the present invention has and good effect are: by adopting the cryogenic gas being arranged in cold environment by air intake opening and introducing needed for outdoor cold air refrigeration generation generation snow particle, the water smoke that the water smoke section of generation generates is converted into ice crystal, form snow-driving wind, through spreader plate water conservancy diversion, unrestrained from test section top, thus form snowfall environment, the simulation of the wind blown snow movement environment considering snowfall is realized in short time, greatly can reduce the energy resource consumption needed for refrigeration, the effect of reach environment protecting and power-saving, raising the efficiency.Further, the present invention, by adopting opening single flow structure, can avoid the damage because avenging power section inner blower equipment, various measuring equipment and pipeline that backflow of particles causes effectively; , because snow particle generated before entering test section, the wind-tunnel major part stage is not affected meanwhile, in test, only need focus on maintenance water smoke being generated to section and test section.The present invention can install outdoor air intake opening, turn section, refrigerating section additional on conventional open direct current wind-tunnel basis, water smoke generates section and the transformation of corresponding auxiliary facility forms.Compared to existing large-scale icing tunnel, the present invention has low, the environmental protection of test energy consumption, efficiency is high, simple structure, cost are low, operation and maintenance cost is low advantage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is that water smoke of the present invention generates section three-dimensional cutaway view;
Fig. 3 is that water smoke of the present invention generates section section plan;
Fig. 4 is atomization air-blast atomizer of the present invention and connecting line detail drawing thereof.
In figure: 1, air intake opening; 2, turn section; 3, power section; 4, diffuser; 5, stable section; 6, water smoke generates section; 7, water smoke feed system; 8, pressure water source; 9, pressure gas source; 10, pressure water source valve; 11, pressure water line; 12, Heat preservation equipment; 13, pressure gas source valve; 14, pressed gas pipeline; 15, air-blast atomizer is atomized; 16, spreader plate; 17, temperature and flow measurement device; 18, test section; 19, test model; 20, testing laboratory's exterior wall.
Embodiment
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to the environment protecting and power-saving wind-tunnel of a kind of energy of Fig. 1 ~ Fig. 4 snowfall simulation process, this wind-tunnel adopts opening single flow, comprises the air intake opening 1, power section 3, diffuser 4, stable section 5, water smoke generation section 6 and the test section that connect successively; It is disposed in the outdoor that described air intake opening 1 passes testing laboratory's exterior wall 20; In described power section 2, blower fan is installed; Atomization air-blast atomizer 15 is provided with on the described water smoke top generated in section 6, described atomization air-blast atomizer 15 is provided with air intake opening and water inlet, described air intake opening is connected with pressure gas source 9 by pressed gas pipeline 14, and described water inlet is connected with pressure water source 8 by pressure water line 11; Spreader plate 16 is provided with in the below of described atomization air-blast atomizer 15, described spreader plate 16 is positioned at the middle and upper part that described water smoke generates section 6, the both sides, middle part of described spreader plate 16 are equipped with the side walls hinged bearing pin generating section 6 with described water smoke, and the both sides, front and rear part of described spreader plate 16 are equipped with the register pin of the sidewall grafting generating section 6 with described water smoke.
In the present embodiment, this wind-tunnel also comprises turn section 2, and the import of described turn section 2 extends to outdoor and is connected with described air intake opening 1, and the outlet of described turn section 2 extends to indoor and is connected with the import of described power section 3.Described pressure water line 11 is provided with Heat preservation equipment 12.The exit generating section 6 at described water smoke is provided with temperature and flow measurement device 17.In the exit of described pressure water source 8, pressure water source valve 10 is installed.In the exit of described pressure gas source 9, pressure gas source valve 13 is installed.
When outside air temperature is cold, refer generally to temperature between-30 DEG C to-10 DEG C, the north of china in winter of such as China, the time of temperature cold about has 3-4 month, and in the meantime, direct employing outdoor cold air carries out freezing as cold air source and just can reach good effect.Cold air, by the driving of power section inner blower, enters wind-tunnel through outdoor air intake opening, and the water smoke condensation making aerosol generate section generation forms snow particle.This refrigeration modes needs to consume any energy hardly, and can realize fast-refrigerating.
The principle of work of above-mentioned wind-tunnel each several part is as follows:
Turn section 2 can effectively insulated chamber external admission mouth 1 and wind-tunnel agent structure, makes wind-tunnel major part component and test equipment be in normal temperature laboratory environment, avoids causing device damage or exception because temperature is too low.
Power section 3, diffuser 4 are identical with conventional wind-tunnel with the principle of stable section 5.
Water smoke generates section 6 inner top and is provided with atomization air-blast atomizer 15, atomization air-blast atomizer 15 connects and composes water smoke feed system 7 with pressure water source 8 and pressure gas source 9 respectively by respective pipeline, in the present embodiment, this water smoke feed system 7 is made up of pressure water source 8, pressure gas source 9, pressure water source valve 10, pressure water line 11, Heat preservation equipment 12, pressure gas source valve 13, pressed gas pipeline 14 and atomization air-blast atomizer 15, provides and generates the tiny particle water of snow needed for particle.Press water in pressed gas in pressure gas source 9 and pressure water source 8 flows through air intake opening and the water inlet that respective pipeline enters atomization air-blast atomizer 15 respectively, produces tiny particle water and is sprayed by atomization air-blast atomizer 15.By regulating pressure gas source valve 13 and pressure water source valve 10 controlled pressure gas and press water flow respectively, thus control spray amount.Be under very low temperature because atomization air-blast atomizer 15 affects by cold air incoming flow, water body in nozzle may be caused to condense, plug nozzle.Occur for preventing this phenomenon, pressure water line 11 arranges heat insulation and heating equipment 12, to the water body heating (because the thermal conductivity of water is larger than air) in pipeline, the water temperature that atomization air-blast atomizer 15 is sprayed is unlikely to too low, the water temperature such as making atomization air-blast atomizer 15 spray reaches more than 20 DEG C, thus ensures that atomization air-blast atomizer 15 is unimpeded.
Spreader plate 16 is positioned at the middle and upper part that water smoke generates section 6, and the inside of the water smoke section of generation 6 is divided into upper and lower two regions, Shi Chengxue district, top, bottom is cold air district.In the Cheng Xuequ of top, the cold air blown by stable section and the water smoke sprayed by atomization air-blast atomizer 15 mix to generate avenges particle, is guided to the top in test section 18, the snowfall that simulation snow particle descends slowly and lightly from above through spreader plate 16.In lower ones district, the cold air stream from stable section is directly guided to test section 18.The angle of pitch of spreader plate 16 can regulate within the specific limits, to regulate the snowfall altitude range and initial velocity etc. of test section 18.
The exit generating section 6 at water smoke is provided with temperature and flow measurement device 17, for monitoring the actual flow and the temperature that enter the snow-driving wind of test section 18.
Concrete use procedure of the present invention is as follows:
On-test, open the Heat preservation equipment 12 on pressure water source valve 10 and pressure water line, pressure water line 11 is carried out preheating and is incubated.Arrival predetermined temperature to be heated, during as 40 DEG C to 50 DEG C, closing presure water source valve 10 and Heat preservation equipment 12.Then, open the blower fan being positioned at power section 3, outdoor cold air is sucked wind-tunnel and forms steady air flow, test model 19 is placed in test section 18.Actual temperature and the flow of wind-tunnel inner fluid is monitored by the temperature and flow measurement device 17 being positioned at aerosol generation section 6, when fluid temperature (F.T.) is down to predetermined value as-20 DEG C, open pressure gas source valve 13, pressure water source valve 10 and Heat preservation equipment 12, in aerosol generation section 6, tiny particle water is sprayed by atomization air-blast atomizer 15, tiny particle water and cold air condensation by mixing, Cheng Xuequ above spreader plate 16 generates snow particle, under the guide functions of spreader plate 16, snow particle descends slowly and lightly from the top of test section 18, form the wind and snow two-phase fluid environment considering snowfall.Actual temperature and the flow that the temperature in section exit and flow measurement device 17 can monitor wind and snow fluid in wind-tunnel is generated by aerosol; By regulating the aperture of pressure gas source valve 13 and pressure water source valve 10, the concentration of wind and snow fluid moderate snow particle can be regulated; By regulating the luffing angle of spreader plate 16, the parameters such as the initial velocity of snowfall height, snowfall scope and the wind and snow two-phase in test section 18 can be regulated.After predetermined test period to be achieved, first closing presure gas source valve 13, pressure water source valve 10 and Heat preservation equipment 12, then close the blower fan in power section 2.Survey record is carried out to test section, acquisition test data, terminate test.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make a lot of form, these all belong within protection scope of the present invention.
Claims (6)
1. an environment protecting and power-saving wind-tunnel for energy snowfall simulation process, this wind-tunnel adopts opening single flow, it is characterized in that, comprises the air intake opening, power section, diffuser, stable section, water smoke generation section and the test section that connect successively;
Described air intake opening is disposed in the outdoor;
In described power section, blower fan is installed;
The top generated in section at described water smoke is provided with atomization air-blast atomizer, and described atomization air-blast atomizer is provided with air intake opening and water inlet, and described air intake opening is connected with pressure gas source by pressed gas pipeline, and described water inlet is connected with pressure water source by pressure water line; Spreader plate is provided with in the below of described atomization air-blast atomizer, described spreader plate is positioned at the middle and upper part that described water smoke generates section, the both sides, middle part of described spreader plate are equipped with the side walls hinged bearing pin generating section with described water smoke, and the both sides, front and rear part of described spreader plate are equipped with the register pin of the sidewall grafting generating section with described water smoke.
2. the environment protecting and power-saving wind-tunnel of energy snowfall simulation process according to claim 1, it is characterized in that, this wind-tunnel also comprises turn section, and the import of described turn section extends to outdoor and is connected with described air intake opening, and the outlet of described turn section extends to indoor and is connected with the import of described power section.
3. the environment protecting and power-saving wind-tunnel of energy snowfall simulation process according to claim 1, is characterized in that, described pressure water line is provided with Heat preservation equipment.
4. the environment protecting and power-saving wind-tunnel of energy snowfall simulation process according to claim 1, it is characterized in that, the exit generating section at described water smoke is provided with temperature and flow measurement device.
5. the environment protecting and power-saving wind-tunnel of energy snowfall simulation process according to claim 1, is characterized in that, be provided with pressure water source valve in the exit of described pressure water source.
6. the environment protecting and power-saving wind-tunnel of energy snowfall simulation process according to claim 1, is characterized in that, be provided with pressure gas source valve in the exit of described pressure gas source.
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Cited By (4)
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| CN104913898A (en) * | 2015-06-01 | 2015-09-16 | 东北农业大学 | Horizontal axis wind turbine icing wind tunnel experimental system and method utilizing natural low temperature airflow |
| CN113405761A (en) * | 2021-06-18 | 2021-09-17 | 哈尔滨工业大学 | Wind tunnel precooling device utilizing outdoor low-temperature environment |
| CN113834684A (en) * | 2021-11-26 | 2021-12-24 | 中国飞机强度研究所 | Snowfall environment simulation system and method for aviation aircraft test |
| 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913898A (en) * | 2015-06-01 | 2015-09-16 | 东北农业大学 | Horizontal axis wind turbine icing wind tunnel experimental system and method utilizing natural low temperature airflow |
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| 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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