CN113188749A - Integrated adjustable smoke generating device of smoke wind tunnel - Google Patents
Integrated adjustable smoke generating device of smoke wind tunnel Download PDFInfo
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- CN113188749A CN113188749A CN202110495840.XA CN202110495840A CN113188749A CN 113188749 A CN113188749 A CN 113188749A CN 202110495840 A CN202110495840 A CN 202110495840A CN 113188749 A CN113188749 A CN 113188749A
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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 an integrated adjustable smoke generating device of a smoke tunnel, which comprises a shell, an evaporation unit and a smoke oil storage and backflow unit, wherein the evaporation unit and the smoke oil storage and backflow unit are arranged in the shell. The integrated adjustable smoke tunnel fuming device adopts an integrated design of concentrating air intake, fuming and smoke exhaust and a longitudinally discrete smoke supply mode, so that the problem that the smoke concentration is reduced due to long distance of smoke passing pipelines because smoke is supplied intensively by an external fuming device in the traditional smoke guide pipe type fuming device is solved, and the fuming process is concentrated, continuous and uniform; the two-dimensional continuous smoke can be generated in a flow field by adopting a longitudinally discrete smoke supply mode, the baffle plate embedded into the groove on the inner side of the smoke outlet is rotated in a sliding mode, the longitudinal number, the interval and the size of holes aligned with the smoke outlet are adjusted according to test requirements, smoke lines in different states can be obtained, the number, the interval and the thickness of the smoke lines are not limited by the diameter of a pipeline, and the smoke line generator has better applicability in a small-sized low-speed wind tunnel.
Description
Technical Field
The invention belongs to the field of wind tunnel experiments, relates to a smoke generating device of a smoke tunnel, and particularly relates to an integrated adjustable smoke generating device of the smoke tunnel.
Background
With the rapid development of the capabilities of fluid mechanics theory analysis and numerical calculation, the flow field display technology which can visually demonstrate and verify the theoretical result is also more important. Among a plurality of flow field display technologies, the smoke wind tunnel is one of the most basic means, and has the advantages of simple principle, high visualization degree, stable effect and the like. In teaching and scientific research of fluid mechanics, the visualization of a flow field is usually realized by means of smoke, and the flow field state around a bypassing object is displayed by a smoke line generated by a smoke generating device. Therefore, the good smoke generating effect of the smoke generating device of the smoke wind tunnel is an important guarantee for the flow field display experiment.
According to the existing related devices, the common smoke wind tunnel smoke generating devices have two types, one type is that a heating resistance wire is placed at the upstream of a test piece, smoke oil is coated on the resistance wire, and smoke lines are generated in a smoke oil evaporation mode. The device adopting the structure can not timely supplement the tobacco tar, and only repeatedly re-smearing the tobacco tar during the experiment, or supplement the tobacco tar in a gravity dripping mode, but easily causes unstable tobacco lines and uneven concentration, and has poor display effect. Patent publication No. CN105509991A, entitled smoke generating device for smoke wind tunnel, describes a smoke generating device using the above scheme.
The other design idea is to miniaturize the smoke generating device for the large-scale smoke wind tunnel, and the smoke generating device is designed to introduce smoke into a flow field through a bent pipe. The design idea can realize the uninterrupted supply of the tobacco threads, but because the smoke generating device is separated from the nozzle, the lengths of pipelines of different tobacco threads are different, and the concentration of the tobacco threads is easily different. Meanwhile, the number of the smoke lines and the distance between the smoke lines are not adjustable, and the universality suitable for different experiments is not realized. In a small low-speed wind tunnel, a pipeline with a larger size has a larger influence on a flow field in the wind tunnel, so that the test effect is influenced. A smoke generating device designed as described above is disclosed in patent publication No. CN110726525A entitled portable smoke stream device.
In conclusion, the existing smoke wind tunnel is still lack of a smoke generating device which can generate smoke uniformly and continuously, has small influence on the flow field of the small-sized low-speed wind tunnel and can adjust the state of a smoke line according to test requirements.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an integrated adjustable smoke generating device of a smoke wind tunnel.
The technical problem to be solved by the invention is realized by the following technical scheme:
the utility model provides a smoke wind tunnel smoke generating device with adjustable an organic whole which characterized in that: the device comprises a shell, an evaporation unit and a tobacco tar storage and backflow unit, wherein the evaporation unit and the tobacco tar storage and backflow unit are arranged in the shell, the right side of the shell facing the flow field direction is opened to form an air inlet, the left side of the shell tangent to the flow field direction is provided with a smoke outlet, the inner side of the smoke outlet is provided with a smoke outlet tobacco line baffle through a groove, and the smoke outlet tobacco line baffle is longitudinally provided with a plurality of rows of holes; the evaporation unit comprises a tobacco tar flowing evaporation plate and a heating resistance wire, the tobacco tar flowing evaporation plate is longitudinally provided with a groove for tobacco tar flowing, the heating resistance wire is placed in the groove, the heating resistance wire is connected with a lead on the back of the tobacco tar flowing evaporation plate, and the lead is connected with an external power supply; the tobacco tar storage backflow unit comprises an upper oil tank, a lower oil tank, a return oil pump and a return oil pipeline, the upper oil tank and the lower oil tank are respectively arranged on the upper wall surface and the lower wall surface of the inner side of the shell, an oil tank oil filler hole is formed in the top end of the shell, an opening is formed in the bottom end of the upper oil tank and the position, corresponding to the groove, of the tobacco tar flowing evaporation plate, an opening is formed in the position, corresponding to the groove, of the lower oil tank and the position, corresponding to the groove, of the tobacco tar flowing evaporation plate, two ends of the return oil pipeline are respectively connected with the upper oil tank and the lower oil tank, and the return oil pump is arranged on the return oil pipeline.
The casing is cylindrical, and has a streamlined cross section corresponding to the flow field.
And the upper part and the lower part of the smoke outlet are both provided with openings for adjusting the smoke outlet smoke line baffle, support plates for adjusting the angle of the smoke outlet smoke line baffle and sliding along the groove direction penetrate through the openings, and the support plates are connected to the smoke outlet smoke line baffle.
And the distance, the number and the size of a plurality of rows of holes arranged on the smoke outlet smoke line baffle plate are different.
And the diameter of the groove on the tobacco tar evaporation plate is slightly larger than that of the resistance wire.
Moreover, the tobacco tar evaporating plate is made of heat-resistant insulating materials.
And the tobacco tar evaporating plate is obliquely arranged along the direction from the air inlet to the smoke outlet of the shell.
The invention has the advantages and beneficial effects that:
1. the integrated adjustable smoke tunnel smoke generating device adopts an integrated design of centralizing air intake, smoke generation and smoke exhaust and a longitudinally discrete smoke supply mode, so that the problem that the smoke concentration is reduced due to long distance of smoke supply pipelines because smoke is intensively supplied by an external smoke generating device in the traditional smoke guide pipe type smoke generator is solved, and the smoke generating process is centralized, continuous and uniform.
2. The invention relates to an integrated adjustable smoke generating device of a smoke wind tunnel, which is arranged in a wind tunnel flow field on the premise of not influencing the stability of the flow field.
3. The integrated adjustable smoke wind tunnel smoke generating device can generate two-dimensional continuous smoke in a flow field by adopting a longitudinally discrete smoke supply mode, and can obtain smoke lines in different states by sliding and rotating the baffle embedded into the groove on the inner side of the smoke outlet and adjusting the longitudinal number, the interval and the size of holes aligned with the smoke outlet according to test requirements, wherein the number, the interval and the thickness of the smoke lines are not limited by the diameter of a pipeline, and the integrated adjustable smoke wind tunnel smoke generating device has better applicability in a small-sized low-speed wind tunnel.
4. According to the integrated adjustable smoke tunnel fuming device, the diameter of the groove in the oil evaporation plate is slightly larger than that of the resistance wire, so that the resistance wire can be completely soaked in smoke oil.
5. According to the integrated adjustable smoke tunnel fuming device, the smoke oil evaporating plate is made of heat-resistant insulating materials, so that the smoke oil evaporating plate is prevented from being molten during smoke oil evaporation, and a loop is also prevented from being formed with the heating resistance wire, so that the resistance wire is short-circuited.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a sectional view of the internal structure of the present invention;
FIG. 3 is a partial front view of the outlet smoke line baffle of the present invention;
fig. 4 is a top partial side view of the present invention.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
As shown in fig. 1 to 4, an integrated adjustable smoke wind tunnel fuming device is innovative in that: comprises a shell 1, an evaporation unit and a smoke oil storage and backflow unit which are arranged in the shell.
The shell 1 is cylindrical, the cross section of the shell is in a streamline shape corresponding to a flow field, the right side of the shell 1 facing the flow field direction is opened to form an air inlet 1-2, the left side of the shell 1 tangent to the flow field direction is provided with a smoke outlet 1-1, the upper part and the lower part of the smoke outlet 1-1 are both provided with openings for adjusting smoke outlet smoke line baffles 2, the inner side of the shell is provided with a groove for placing the smoke outlet smoke line baffles 2, a support plate 2-1 for adjusting the angle of the smoke outlet smoke line baffles to slide along the groove direction is arranged in the openings in a penetrating manner, the support plate 2-1 is connected to the smoke outlet smoke line baffles 2, and the support plate 2-1 is tightly attached to the inner wall of the shell 1 to ensure the sealing of the smoke outlet; the cigarette line baffle 2 at the cigarette outlet is longitudinally provided with a plurality of rows of holes 2-2, and the distance, the number and the size of the plurality of rows of holes 2-2 are different.
The evaporation unit comprises a tobacco tar flowing evaporation plate 3 and a heating resistance wire 8, a groove for tobacco tar flowing is longitudinally formed in the tobacco tar flowing evaporation plate 3, the diameter of the groove in the tobacco tar evaporation plate 3 is slightly larger than that of the resistance wire 8, the heating resistance wire 8 is placed in the groove, and the resistance wire 8 can be completely soaked in the tobacco tar; the tobacco tar evaporating plate 3 is made of heat-resistant insulating materials, so that the tobacco tar evaporating plate 3 is prevented from being melted when the tobacco tar is evaporated, and a loop is also prevented from being formed with the heating resistance wire 8, so that the heating resistance wire 8 is short-circuited; the tobacco tar evaporating plate 3 is obliquely arranged along the direction from the air inlet 1-2 to the smoke outlet 1-1 of the shell 1, guides airflow of the wind tunnel to flow into the device, mixes with evaporated smoke and flows out of the device along the smoke outlet, and reduces the windward area of the whole device by oblique arrangement; the heating resistance wire 8 can be made of high-resistivity and high-strength materials such as a nickel-chromium alloy wire, the heating resistance wire 8 is connected with a lead on the back of the tobacco tar flowing evaporation plate, and the lead is connected with an external power supply to form a loop and provide heat for evaporating the tobacco tar.
The smoke oil storage backflow unit comprises an upper oil tank 5, a lower oil tank 4, an oil return pump 6 and an oil return pipeline 7, wherein the upper oil tank 5 and the lower oil tank 4 are respectively arranged on the upper wall surface and the lower wall surface of the inner side of the shell 1, an oil tank oil filling port 1-3 is arranged at the top end of the shell 1, and the oil tank oil filling port 1-3 has the function of balancing internal and external pressure difference besides supplying smoke oil, so that the smoke oil can naturally flow; the bottom end of the upper oil tank 5 is provided with an opening at the position corresponding to the groove of the tobacco tar flowing evaporation plate 3, the lower oil tank 4 is provided with an opening at the position corresponding to the groove of the tobacco tar flowing evaporation plate 3, and the tobacco tar naturally flows into the groove from the upper oil tank 5 and is left at the corresponding opening of the lower oil tank 4 along the groove; the two ends of the oil return pipeline 7 are respectively connected with the upper oil tank 5 and the lower oil tank 4, the oil return pump 6 is arranged on the oil return pipeline 7, and the oil return pump 6 and the oil return pipeline 7 are arranged in the space at the rear side of the smoke flowing evaporation plate 3 and used for reflowing and evaporating residual smoke to flow into the upper oil tank 5 again.
The working principle of the invention is as follows:
the device is placed in a wind tunnel flow field, an external power supply of a heating resistance wire 8 is communicated and preheated, a reflux pump 6 is started to keep the tobacco tar in an oil tank to flow, when the tobacco tar flows into a groove of a tobacco tar evaporation plate 3 from an upper oil tank 5, the heating resistance wire 8 evaporates and atomizes the tobacco tar, then the tobacco tar is quickly liquefied into small oil drops which float in the air to form smoke, and the redundant tobacco tar flows into a lower oil tank 4 and flows back to the upper oil tank 5 through a return oil pipeline 7 by the reflux pump 6; inside the flow field comes to flow through casing 1 air inlet access device, mixes the dyeing with inside smog, is blockked by outlet flue gas line baffle 2 when flowing from 1 outlet flue of casing orientation, flows out by the hole and forms the cigarette line, adjusts outlet flue 2 according to the experiment needs and aims at the hole quantity, interval, the size of outlet flue, can obtain required cigarette line.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (7)
1. The utility model provides a smoke wind tunnel smoke generating device with adjustable an organic whole which characterized in that: the device comprises a shell (1), an evaporation unit and a tobacco tar storage and backflow unit, wherein the evaporation unit and the tobacco tar storage and backflow unit are installed in the shell, the right side of the shell (1) facing the flow field direction is opened to form an air inlet (1-2), the left side of the shell (1) tangent to the flow field direction is provided with a smoke outlet (1-1), the inner side of the smoke outlet is provided with a smoke outlet tobacco line baffle (2) through a groove, and the smoke outlet tobacco line baffle (2) is longitudinally provided with a plurality of rows of holes (2-2); the evaporation unit comprises a tobacco tar flowing evaporation plate (3) and a heating resistance wire (8), a groove for flowing tobacco tar is longitudinally formed in the tobacco tar flowing evaporation plate (3), the heating resistance wire (8) is placed in the groove, the heating resistance wire (8) is connected with a lead on the back of the tobacco tar flowing evaporation plate, and the lead is connected with an external power supply; the tobacco tar storage backflow unit comprises an upper oil tank (5), a lower oil tank (4), an oil return pump (6) and an oil return pipeline (7), wherein the upper oil tank (5) and the lower oil tank (4) are respectively arranged on the upper wall surface and the lower wall surface of the inner side of the shell (1), an oil tank oil filling port (1-3) is formed in the top end of the shell (1), open holes are formed in the positions, corresponding to the grooves, of the bottom end of the upper oil tank (5) and the tobacco tar flowing evaporation plate (3), open holes are formed in the positions, corresponding to the grooves, of the lower oil tank (4) and the tobacco tar flowing evaporation plate (3), two ends of the oil return pipeline (7) are respectively connected with the upper oil tank (5) and the lower oil tank (4), and the oil return pump (6) is arranged on the oil return pipeline (7).
2. The integrally adjustable smoke tunnel smoke generating device of claim 1, wherein: the shell (1) is cylindrical, and the section of the shell is in a streamline shape corresponding to the flow field.
3. The integrally adjustable smoke tunnel smoke generating device of claim 1, wherein: openings for adjusting the smoke outlet smoke line baffles (2) are formed in the upper portion and the lower portion of the smoke outlet (1-1), support plates (2-1) for adjusting the angles of the smoke outlet smoke line baffles and sliding along the groove direction penetrate through the openings, and the support plates (2-1) are connected to the smoke outlet smoke line baffles (2).
4. The integrally adjustable smoke tunnel smoke generating device of claim 1, wherein: the distance, the number and the size of a plurality of rows of holes (2-2) arranged on the smoke outlet smoke line baffle (2) are different.
5. The integrally adjustable smoke tunnel smoke generating device of claim 1, wherein: the diameter of the groove on the tobacco tar evaporation plate (3) is slightly larger than that of the resistance wire (8).
6. The integrally adjustable smoke tunnel smoke generating device of claim 1, wherein: the tobacco tar evaporating plate (3) is made of heat-resistant insulating materials.
7. The integrally adjustable smoke tunnel smoke generating device of claim 1, wherein: the tobacco tar evaporating plate (3) is obliquely arranged along the direction from the air inlet (1-2) to the smoke outlet (1-1) of the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110495840.XA CN113188749B (en) | 2021-05-07 | 2021-05-07 | Integrated adjustable smoke generating device of smoke wind tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110495840.XA CN113188749B (en) | 2021-05-07 | 2021-05-07 | Integrated adjustable smoke generating device of smoke wind tunnel |
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| CN113188749A true CN113188749A (en) | 2021-07-30 |
| CN113188749B CN113188749B (en) | 2022-09-27 |
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| CN202110495840.XA Active CN113188749B (en) | 2021-05-07 | 2021-05-07 | Integrated adjustable smoke generating device of smoke wind tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113848033A (en) * | 2021-09-24 | 2021-12-28 | 哈尔滨工程大学 | Smoke continuous generating device for small visual wind tunnel test bed |
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| CN210983947U (en) * | 2019-09-30 | 2020-07-10 | 知与（杭州）科技有限公司 | Smoke wind tunnel for physics experiments |
| CN211554593U (en) * | 2019-08-21 | 2020-09-22 | 韩迎峰 | Novel portable cigarette device |
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2021
- 2021-05-07 CN CN202110495840.XA patent/CN113188749B/en active Active
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| JPH11101709A (en) * | 1997-09-26 | 1999-04-13 | Mitsubishi Heavy Ind Ltd | Smoke-generating device |
| JP2001056267A (en) * | 1999-08-20 | 2001-02-27 | Japan Science & Technology Corp | Smoke blowout device |
| US7730909B1 (en) * | 2007-12-07 | 2010-06-08 | Green Jay B | Accessory for a vapor generator |
| CN201177912Y (en) * | 2008-02-03 | 2009-01-07 | 上海电气自动化设计研究所有限公司 | Demonstration apparatus for automobile wind tunnel effect |
| JP2011122992A (en) * | 2009-12-14 | 2011-06-23 | Ikutoku Gakuen | Vertical wind tunnel device |
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| CN205264188U (en) * | 2015-12-24 | 2016-05-25 | 厦门外国语学校 | Teaching is with test section of small -size low -speed smoke wind tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113848033A (en) * | 2021-09-24 | 2021-12-28 | 哈尔滨工程大学 | Smoke continuous generating device for small visual wind tunnel test bed |
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