CN210442079U - Boundary layer teaching test bed capable of generating smoke - Google Patents
Boundary layer teaching test bed capable of generating smoke Download PDFInfo
- Publication number
- CN210442079U CN210442079U CN201921689417.8U CN201921689417U CN210442079U CN 210442079 U CN210442079 U CN 210442079U CN 201921689417 U CN201921689417 U CN 201921689417U CN 210442079 U CN210442079 U CN 210442079U
- Authority
- CN
- China
- Prior art keywords
- section
- smoke
- boundary layer
- oil
- experimental
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The utility model discloses a boundary layer teaching test bed capable of generating smoke, which comprises a wind tunnel main body, a smoke generating device and a fixed part, wherein the wind tunnel main body consists of a wide-angle diffuser, a stable section, a contraction section, a rectification section, an experimental section and an outlet diffuser; one end of the wide-angle diffuser is provided with a motor connector which is used for being connected with a variable frequency fan; the wide-angle diffuser, the stabilizing section, the contraction section, the rectifying section, the experiment section and the outlet diffuser are sequentially connected through a flange plate; the smoke generating device is arranged on the rectifying section; the fixed part is used for connecting and supporting the wind tunnel main body. The utility model has the advantages that: the disassembly and the transportation are easy, the experiment precision is improved, and the experiment content is enriched; the air flow condition can be observed, and the experimental phenomenon is more intuitive.
Description
Technical Field
The utility model relates to a teaching instrument especially relates to a boundary layer teaching test platform that can produce smog.
Background
A boundary layer teaching experiment table is a pipeline-shaped experiment device which utilizes a small wind tunnel to generate and control airflow in a manual mode, is used for simulating the boundary layer condition of the surrounding air of an aircraft or an entity, can measure the effect of the airflow on the entity and observe physical phenomena, and is one of the most effective tools in aerodynamic teaching experiments. However, products which can generate smoke flow, can be freely disassembled and assembled and the like do not appear in the market at present.
In the prior art, at present, techniques such as: the fluent visual portable smoke tunnel device-article number 1002-4956(2006)04-0040-04 has the characteristics of good smoke generation, lightness, portability and the like. But the size is too small, and the teaching show of the boundary layer on the classroom of university is not adapted, and the oiling operation needs to be carried out on the fuming metal wire in each experiment, thereby increasing the complexity of the experimental process. The DB-587 multifunctional boundary layer experiment table developed by Shanghai top nation education equipment Co., Ltd and the similar TY-587 multifunctional boundary layer experiment table are mainly used for learning and measuring the surface pressure distribution of an object when fluid flows around the object. However, such devices are heavy and inflexible, and the devices using hydraulic pressure test cannot test the experimental values accurately, which affects the experimental results. Moreover, the equipment is not intelligent, humanized and visualized enough, the experimental requirements of teachers and students cannot be met, and the experimental pleasure is lacked. Meanwhile, the main working principle of the existing smoke generator on the market is to heat the smoke oil and then guide the generated smoke out by a guide pipe. Thus, when the experiment related to the boundary layer is carried out, the smoke outlet guide pipe of the smoke generator possibly influences the airflow, so that the error of the experimental result is caused, and the smoke generating effect is not good.
Disclosure of Invention
In view of the above technical problem, the utility model provides a can produce boundary layer teaching test platform of smog.
The utility model provides a technical scheme that its technical problem adopted is:
a boundary layer teaching test bed capable of generating smoke comprises a wind tunnel main body, a smoke generating device and a fixed part,
the wind tunnel main body consists of a wide-angle diffuser 9, a stabilizing section 3, a contraction section 10, a rectification section 11, an experiment section 14 and an outlet diffuser 8;
one end of the wide-angle diffuser 9 is provided with a motor connecting port 1, and the motor connecting port 1 is used for being connected with a variable frequency fan; the wide-angle diffuser 9, the stabilizing section 3, the contraction section 10, the rectifying section 11, the experimental section 14 and the outlet diffuser 8 are sequentially connected through a flange 2;
the smoke generating device is arranged on the rectifying section 11;
the fixed part is used for connecting and supporting the wind tunnel main body.
Further, the wide-angle diffuser 9 is used for controlling boundary layers and avoiding delamination; the stabilizing section 3 enables the turbulent airflow from the variable frequency fan to become smooth and stable through speed reduction, has the function of storing gas and provides gas with sufficient pressure for the subsequent contraction section 10; the contraction section 10 uniformly accelerates the airflow flowing out of the stabilization section 3, so that the quality of a flow field is improved; a rectifying net 15 is arranged in the rectifying section 11, the rectifying net 15 acts to enable airflow to be uniform, turbulence is reduced, airflow quality is improved, rectified gas is changed into visual gas through a smoke generating device, and the visual gas enters the experiment section 14 to perform boundary layer experiments; the experimental section 14 is provided with a measuring instrument placing port 6 and an experimental model placing port 7; the outlet diffuser 8 is at the end of the wind tunnel body.
Further, the contraction section 10 adopts a Wittonsishi curve, so that the boundary layer does not generate an in-vitro phenomenon.
Further, the measuring instrument placing port 6 is used for placing a proportional tube, a pressure gauge, a speed probe and a height gauge; the experimental model placing port 7 is used for placing experimental pieces.
Further, the experimental part is a cylinder, a wing model or a straight smooth plate.
Further, the smoke generating device comprises an oil tank 5, a smoke generating section and a smoke collector 12; the oil tank 5 is divided into an upper layer and a lower layer, the upper layer contains an electrode block and an oil injection port which are protected by an insulating tank, the lower layer is a temporary oil storage tank, the lower part is provided with a small opening through which cut tobacco and oil drops can pass, and an oil mass adjusting block 4 is arranged in the oil injection port between the upper layer and the lower layer and used for controlling the oil mass; the oil drops dropping from the small holes of the oil tank slide down along the tobacco shreds in the smoke generating section, and the oil drops are changed into white smoke due to heat generated by electrifying the tobacco shreds in the smoke generating section and enter the experiment section along with the airflow; the tobacco tar collector 12 collects oil drops which cannot be completely converted into white smoke on tobacco shreds, the oil drops are collected in an oil storage chamber of the tobacco tar collector 12, and an electrode block protected by an insulating box is arranged in the tobacco tar collector 12 and connected with the conduction current of the tobacco shreds.
Further, the fixing portion has a support bracket 13.
The utility model has the advantages that:
compared with the prior art, the laboratory bench removes current experimental function (including the condition that relatively actual fluid and ideal fluid distribute around the surface pressure when cylinder fluid, measure fluid and flow around wing time wing surface pressure distribution, survey the surface pressure distribution of wing under different attack angles etc.), newly increases the stream of cigarette and produces function and hole body and dismantle the combined function. The boundary layer experiment table comprises a connectable smoke generating device and a plurality of independent hole body composition units. Each hole body composition unit can be freely combined and disassembled through the flange plate, and can be disassembled into independent parts during transportation and storage, so that the hole body composition unit is easy to disassemble and carry, saves storage space, and is convenient to maintain and clean; the wind speed can be accurately controlled by using the variable frequency fan, so that the experimental precision is improved; more experiment contents can be expanded by changing modules placed in the test sections, and the experiment contents are enriched; the smoke generating device can be used for generating smoke, so that the airflow condition can be observed, and the experimental phenomenon is more intuitive.
Drawings
Fig. 1 is an isometric view of a laboratory bench of the present invention;
FIG. 2 is a schematic structural view (top view) of the experiment table of the present invention;
FIG. 3 is a schematic structural view (front view) of the experiment table of the present invention;
FIG. 4 is a schematic view of the laboratory bench of the present invention (right side view);
figure 5 is a detail view of the smoke generating device of the present invention;
FIG. 6 is an enlarged view of tobacco shreds in the smoke generating apparatus of the present invention;
in the figure, a motor connecting port 1, a flange plate 2, a stabilizing section 3, an oil quantity adjusting block 4, an oil tank 5, a measuring instrument placing port 6, an experimental model placing port 7, an outlet diffuser 8, a wide-angle diffuser 9, a contraction section 10, a rectification section 11, a smoke collector 12, a support frame 13, an experimental section 14 and a rectification network 15 are arranged.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
As shown in fig. 1, 2, 3, 4, 5 and 6, the boundary layer teaching test bed capable of generating smoke is composed of a wind tunnel main body composition unit, a smoke generating device and a fixed part.
Firstly, a wind tunnel main body composition unit: the device consists of a wide-angle diffuser 9, a stabilizing section 3, a contraction section 10, a rectifying section 11, an experimental section 14 and an outlet diffuser 8.
(I), wide-angle diffuser: the wide-angle diffuser 9 is usually connected with a variable frequency fan through a motor connecting port 1. The wide angle diffuser acts to control the boundary layer and avoid delamination.
(II) a stabilizing section: the stabilizing section 3 is connected to a wide-angle diffuser 9 via a flange 2. The main function of the stabilizing section is to smooth out and stabilize the turbulent air flow from the fan by decelerating, and the stabilizing section also functions to store air and provide sufficient pressure to the following convergent section 10.
(III) shrinkage section: the contraction section 10 is connected with the stabilization section 3 through a flange. The contraction section mainly has the function of uniformly accelerating the airflow flowing out of the stabilization section 3 and improving the quality of a flow field. The contraction section curve of the wind tunnel of the experiment table adopts a consignment Chongsky curve, so that the boundary layer does not generate the separation phenomenon.
(IV) a rectifying section: the rectifying section 11 is connected with the contraction section 10 through a flange. The rectifying section contains a rectifying net 15 and a smoke generating device. Wherein the rectifying net 15 acts to make the air flow uniform, the turbulence degree is reduced, and the air flow quality is improved. The rectified gas is changed into visual gas through a smoke generating device, and the visual gas enters the experiment section 14 to carry out boundary layer experiments.
(V) experiment section: the experimental section 14 is connected with the rectifying section 11 through a flange. The experimental section is where the boundary layer experiment was performed. Which comprises a meter placing port 6 and an experimental model placing port 7. The measuring instrument placing port 6 is used for placing measuring instruments such as a pitot tube, a pressure gauge, a speed probe, a height gauge and the like. The experimental model placing port 7 is used for placing various experimental parts, such as cylinders, wing models, flat smooth plates and the like, and is used for carrying out related experiments of different boundary layers.
(VI) outlet diffuser: the outlet diffuser 8 is installed at the downwind position of the wind tunnel working section and is connected with the experimental section 14 through a flange plate, and the expansion is slow. The wind flow at the outlet can have reasonable stability, and the energy loss of the wind tunnel is reduced.
Secondly, a smoke generating device: consists of an oil tank, a smoke generation section and a collection section (a smoke oil collector 12).
(I) an oil tank: is an oil tank 5 which is divided into an upper layer and a lower layer. The upper layer contains electrode block and oiling mouth protected by the insulating case, and the lower floor is interim batch oil tank, and the lower part is opened has the osculum and can makes pipe tobacco and oil drip to pass through. An oil mass adjusting block 4 is arranged in the middle oil filling port of the upper layer and the lower layer to control the oil mass.
(II) a smoking section: oil drops dropping from the small holes of the oil tank slide down along the tobacco shreds. In the process, oil drops are changed into white smoke due to heat produced by electrifying the tobacco shreds, and the white smoke enters the experimental section along with the airflow.
(III) a collecting section: the collecting section is a tobacco tar collector 12, and oil drops which cannot be completely converted into white smoke on the tobacco shreds enter an oil storage chamber in the collecting section along the tobacco shreds, so that uniform recovery processing is facilitated. The collecting section also contains an electrode block protected by an insulating box and is connected with the cut tobacco conduction current.
Thirdly, fixing part: a flange 2 and a support 13. The flange plate 2 is used for connecting and fixing the components of the wind tunnel main body, and the support frame 13 is used for supporting the whole experiment table hole body and fixing the wind tunnel on the experiment table top.
Compared with the prior art, the laboratory bench removes current experimental function (including the condition that relatively actual fluid and ideal fluid distribute around the surface pressure when cylinder fluid, measure fluid and flow around wing time wing surface pressure distribution, survey the surface pressure distribution of wing under different attack angles etc.), newly increases the stream of cigarette and produces function and hole body and dismantle the combined function. The boundary layer experiment table comprises a connectable smoke generating device and a plurality of independent hole body composition units. Each hole body composition unit can be freely combined and disassembled through the flange plate, and can be disassembled into independent parts during transportation and storage, so that the hole body composition unit is easy to disassemble and carry, saves storage space, and is convenient to maintain and clean; the wind speed can be accurately controlled by using the variable frequency fan, so that the experimental precision is improved; more experiment contents can be expanded by changing modules placed in the test sections, and the experiment contents are enriched; the smoke generating device can be used for generating smoke, so that the airflow condition can be observed, and the experimental phenomenon is more intuitive.
Claims (7)
1. The utility model provides a can produce boundary layer teaching test platform of smog which characterized in that: the teaching test bed comprises a wind tunnel main body, a smoke generating device and a fixed part,
the wind tunnel main body consists of a wide-angle diffuser (9), a stabilizing section (3), a contracting section (10), a rectifying section (11), an experimental section (14) and an outlet diffuser (8);
one end of the wide-angle diffuser (9) is provided with a motor connecting port (1), and the motor connecting port (1) is used for being connected with a variable frequency fan; the wide-angle diffuser (9), the stabilizing section (3), the contracting section (10), the rectifying section (11), the experimental section (14) and the outlet diffuser (8) are sequentially connected through a flange plate (2);
the smoke generating device is arranged on the rectifying section (11);
the fixed part is used for connecting and supporting the wind tunnel main body.
2. A smoke producing boundary layer teaching test bed as claimed in claim 1 wherein:
the wide-angle diffuser (9) is used for controlling boundary layers and avoiding delamination;
the stabilizing section (3) enables the turbulent airflow from the variable frequency fan to become smooth and stable through speed reduction, has the function of storing gas and provides gas with sufficient pressure for the subsequent contraction section (10);
the contraction section (10) accelerates the airflow flowing out of the stabilization section (3) uniformly, so that the quality of a flow field is improved;
a rectifying net (15) is arranged in the rectifying section (11), the rectifying net (15) acts to enable airflow to be uniform, turbulence degree is reduced, airflow quality is improved, rectified gas is changed into visual gas through a smoke generating device, and the visual gas enters an experiment section (14) to be subjected to boundary layer experiments;
the experimental section (14) is provided with a measuring instrument placing port (6) and an experimental model placing port (7);
the outlet diffuser (8) is at the end of the wind tunnel body.
3. A smoke producing boundary layer teaching test bed as claimed in claim 1 wherein: the contraction section (10) adopts a WittonsisBasil curve, so that the boundary layer does not generate the separation phenomenon.
4. A smoke producing boundary layer teaching test bed as claimed in claim 2 wherein: the measuring instrument placing port (6) is used for placing a proportional tube, a pressure gauge, a speed probe and a height gauge; the experimental model placing port (7) is used for placing an experimental piece.
5. A smoke producing boundary layer teaching test bed as claimed in claim 4 wherein: the experimental part is a cylinder, a wing model or a straight smooth plate.
6. A smoke producing boundary layer teaching test bed as claimed in claim 1 wherein: the smoke generating device comprises an oil tank (5), a smoke generating section and a smoke collector (12);
the oil tank (5) is divided into an upper layer and a lower layer, the upper layer contains an electrode block and an oil injection port which are protected by an insulating tank, the lower layer is a temporary oil storage tank, the lower part is provided with a small opening through which cut tobacco and oil drops can pass, and an oil mass adjusting block (4) is arranged in the oil injection port between the upper layer and the lower layer and used for controlling the oil mass;
oil drops dropping from the small holes of the oil tank in the smoke generation section slide down along the tobacco shreds, and in the process, the oil drops are changed into white smoke due to heat generated by electrifying the tobacco shreds and enter the experiment section (14) along with the air flow;
the tobacco tar collector (12) collects oil drops which cannot be completely converted into white smoke on tobacco shreds, the oil drops are collected in an oil storage chamber of the tobacco tar collector (12), and an electrode block protected by an insulating box is arranged in the tobacco tar collector (12) and connected with the conduction current of the tobacco shreds.
7. A smoke producing boundary layer teaching test bed as claimed in claim 1 wherein: the fixed part has a support frame (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921689417.8U CN210442079U (en) | 2019-10-11 | 2019-10-11 | Boundary layer teaching test bed capable of generating smoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921689417.8U CN210442079U (en) | 2019-10-11 | 2019-10-11 | Boundary layer teaching test bed capable of generating smoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210442079U true CN210442079U (en) | 2020-05-01 |
Family
ID=70411662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921689417.8U Expired - Fee Related CN210442079U (en) | 2019-10-11 | 2019-10-11 | Boundary layer teaching test bed capable of generating smoke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210442079U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116183157A (en) * | 2023-04-25 | 2023-05-30 | 太原理工大学 | Intelligent wind tunnel experimental device |
-
2019
- 2019-10-11 CN CN201921689417.8U patent/CN210442079U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116183157A (en) * | 2023-04-25 | 2023-05-30 | 太原理工大学 | Intelligent wind tunnel experimental device |
| CN116183157B (en) * | 2023-04-25 | 2023-07-11 | 太原理工大学 | Intelligent wind tunnel experimental device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102426092B (en) | Hydrogen bubble flow display technology-based boundary layer visual test device | |
| CN104132811B (en) | Ramjet engine air inlet starting hesitation characteristic test apparatus | |
| CN107505117B (en) | A kind of experimental provision and method measuring tablet turbulent skn friction resistance | |
| CN108303358A (en) | Oil smoke generating means | |
| CN210442079U (en) | Boundary layer teaching test bed capable of generating smoke | |
| CN109658802A (en) | A kind of pipe gallery fire test plateform system and experimental method | |
| CN102954933A (en) | Saline water spray box | |
| CN110376247A (en) | A kind of lithium ion battery combustion experiment platform | |
| Mestayer et al. | Spray droplet generation, transport, and evaporation in a wind wave tunnel during the humidity exchange over the sea experiments in the simulation tunnel | |
| CN109682714B (en) | Pile body resistance measuring device and resistance coefficient obtaining method | |
| CN105333908B (en) | IVC system cage box environment measuring equipment and its scaling method | |
| CN107179206A (en) | One kind crossing current wet cooling tower drag characteristic experimental rig and method of testing | |
| CN111442898A (en) | Small and medium-sized low-speed wind tunnel test device for testing pesticide fog drop space operation characteristics and drift deposition | |
| CN106875789A (en) | A kind of hydrodynamics teaching experiment device | |
| CN202267588U (en) | Boundary layer visualization test device base on hydrogen bubble flow visualization technology | |
| CN206990736U (en) | Temperature control device for insulator arc-over experiment | |
| CN207231748U (en) | Stream condition tracer at a kind of compartment window | |
| CN107633757B (en) | A kind of diffusion of welding fume controls imitative experimental appliance with blowing and drawing ventilation | |
| CN211927230U (en) | Small and medium-sized low-speed wind tunnel test device for testing pesticide fog drop space operation characteristics and drift deposition | |
| CN109084950A (en) | A kind of visualization device suitable for clean Indoor Flow Field | |
| CN207763918U (en) | Agricultural material floating velocity test device | |
| CN203179395U (en) | Auxiliary experimental device for simulating building wind environment by using artificial airflow | |
| CN209878799U (en) | Snow particle settling velocity measuring device | |
| CN208000688U (en) | Conveniently adjusted radian simple pendulum device | |
| CN211425815U (en) | Multifunctional agricultural material suspension speed testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200501 Termination date: 20201011 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |