CN113029496A - Miniature vertical wind tunnel test device for low-turbulence extremely-low-speed airflow - Google Patents
Miniature vertical wind tunnel test device for low-turbulence extremely-low-speed airflow Download PDFInfo
- Publication number
- CN113029496A CN113029496A CN202110241409.2A CN202110241409A CN113029496A CN 113029496 A CN113029496 A CN 113029496A CN 202110241409 A CN202110241409 A CN 202110241409A CN 113029496 A CN113029496 A CN 113029496A
- Authority
- CN
- China
- Prior art keywords
- section
- wind tunnel
- damping net
- test device
- tunnel test
- 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.)
- Granted
Links
Images
Classifications
-
- 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
- G01M9/02—Wind tunnels
-
- 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
- G01M9/02—Wind tunnels
- G01M9/04—Details
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a miniature vertical wind tunnel test device for low-turbulence extremely-low-speed airflow, which comprises a diffusion section, a stable section and a contraction section which are coaxially and hermetically connected and communicated in sequence from bottom to top; the spiral coil pipe which is gradually reduced from bottom to top is arranged in the diffusion section, and a plurality of holes are uniformly formed in the top of the coil pipe along the length direction, so that smoke generated by the smoke generator can escape through the holes; the stabilizing section is a vertical cylindrical structure with a smooth inner wall and an upper opening and a lower opening, and a first damping net, a honeycomb device, a second damping net and a third damping net which have the same interval and completely cover the inside of the stabilizing section are horizontally arranged in the stabilizing section from top to bottom; the contraction section is of a Vickers curve structure with a smooth inner wall and an upper opening and a lower opening, and gradually contracts from bottom to top. The invention has the advantages of simple design and manufacture, convenient movement, accurate and convenient wind speed control, extremely low starting wind speed and low turbulence, can be used for displaying three-dimensional flow fields of microminiature organisms and aircrafts, and is mainly used for wind tunnel tests.
Description
Technical Field
The invention relates to the technical field of wind tunnel tests, in particular to a miniature vertical wind tunnel test device for low-turbulence extremely-low-speed airflow.
Background
The wind tunnel is a basic device for aerodynamic research, a large number of problems in the aerodynamic research cannot be obtained through theoretical derivation due to factors such as uncertainty of an airflow field, complexity of the appearance of a test object and the like, and the wind tunnel is an indispensable test device for verifying the correctness of a numerical simulation result.
Wind tunnels are of many types and can be divided into direct-flow wind tunnels and return-flow wind tunnels according to whether the gas in the wind tunnels is recycled. The return flow type wind tunnel is mainly used for the condition that the internal pressure of the wind tunnel has special requirements and the gas in the wind tunnel is non-air, the direct flow type wind tunnel has a relatively simple structure and low manufacturing cost, and is widely applied to small wind tunnels. The wind tunnel can be divided into a horizontal wind tunnel and a vertical wind tunnel according to the flow direction of gas in the wind tunnel, the horizontal wind tunnel is common in aviation tests, and the vertical wind tunnel is generally used for parachute testing or entertainment facilities.
The turbulence of the wind tunnel is an important index for measuring the quality of a flow field, most of wind at the outlet of wind generating equipment (such as a fan, a fan and the like) is cyclone, the turbulence is extremely high and is accompanied with a large amount of vortexes, and the design of a proper wind tunnel structure becomes more important. At very low speeds, the flow field quality is greatly affected by the small pulsations of the gas, and the requirement of low turbulence becomes more difficult to meet.
In nature, many small-scale organisms have passive slow-descending movement modes, such as dandelion seeds, maple seeds, certain tiny insects and the like. In order to research the slow falling mode and flow field characteristics of the organisms in the air, a miniature vertical wind tunnel with low turbulence, extremely low speed and stepless and adjustable wind speed is required.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a miniature vertical wind tunnel test device for low-turbulence extremely-low-speed airflow, and solves the problem that the low-turbulence and wind speed stepless regulation of a wind tunnel is difficult to realize in a vertical wind tunnel test of small-scale organisms at extremely-low wind speed.
The invention adopts the following specific technical scheme:
a miniature vertical wind tunnel test device for low-turbulence extremely-low-speed airflow is characterized by comprising a diffusion section, a stable section and a contraction section which are coaxially and hermetically connected and communicated in sequence from bottom to top; the diffusion section is externally connected with a control device capable of steplessly adjusting the air speed, and air flow is stably conveyed to the bottom of the diffusion section through the control device;
the diffusion section is of a cylindrical structure with a smooth inner wall and upper and lower openings, and the inner diameter of the diffusion section is gradually increased from bottom to top; a spiral coil pipe with the spiral line diameter gradually reduced from bottom to top is arranged in the diffusion section, and the diameter of the bottom of the coil pipe is the same as that of the inner wall of the diffusion section at the bottom; two ports of the coil pipe are positioned outside the diffusion section, and the port positioned at the bottom is communicated with the smoke generator; the top of the coil pipe is uniformly provided with a plurality of holes along the length direction, so that smoke generated by the smoke generator can escape through the holes;
the stabilizing section is a vertical cylindrical structure with a smooth inner wall and an upper opening and a lower opening, and a first damping net, a honeycomb device, a second damping net and a third damping net which have the same interval and completely cover the cross section of the stabilizing section are horizontally arranged in the stabilizing section from bottom to top;
the contraction section is of a structure with a smooth inner wall and an upper opening and a lower opening, gradually contracts from bottom to top, and is formed by rotating a Vickers curve around a central shaft.
Preferably, the control device comprises an Arduino Uno development board, a control panel, a power element and a display screen, wherein the Arduino Uno development board is respectively connected with the control panel, the power element and the display screen through lines; the Arduino Uno development board is used for carrying out filter modulation on voltage so as to obtain an initial wind speed which is stable along with time; the control panel is provided with a coarse adjusting knob and a fine adjusting knob and is used for adjusting the rotating speed of the power element through the Arduino Uno development board; the power element is a device for providing airflow; the maximum wind speed which can be provided by the control device is 5m/s, and the minimum resolution is 0.01 m/s.
Further, the power element is an ARCTIC P12 direct current fan.
Preferably, the honeycomb device is a hexagonal honeycomb device, and the hexagonal caliber β and the honeycomb device height L satisfy the relationship: l/β is 10; the material of the honeycomb device adopts an aluminum foil with the thickness of 0.06 mm.
Preferably, the first damping net, the second damping net and the third damping net are all made of 18-mesh stainless steel damping nets with mesh diameters of 0.23 mm.
Preferably, the intervals among the first damping net, the honeycomb device, the second damping net and the third damping net are all 100 cm; the first damping net, the second damping net and the third damping net are connected with the inner wall of the stabilizing section in an external flange plate connection mode.
Preferably, the spiral coil is a metal pipe with the pipe diameter of 300 mm; the coil is located in the middle part of the inner part of the diffusion section, and the height of the coil is half of the height of the diffusion section.
Preferably, the diffusion section and the contraction section are both made of resin materials through 3D printing, and the stabilization section is made of organic glass; the diffusion section, the stabilization section and the contraction section are connected by flanges.
Preferably, the vertical wind tunnel test device is integrally fixed on the support, a base of the support is provided with a plurality of pulleys used for moving, and each pulley is provided with a locking limiting device.
Preferably, the diameter of the inlet of the diffusion section is 100mm, the diameter of the outlet is 300mm, and the length is 300 mm; the diameter of the stabilizing section is 300mm, and the total length is 400 mm; the diameter of the inlet of the contraction section is 300mm, the diameter of the outlet is 200mm, and the length is 300 mm.
Compared with the prior art, the invention has the following beneficial effects:
1) the miniature vertical wind tunnel test device has the overall size not more than 500 multiplied by 1800mm (length multiplied by width multiplied by height), and has the advantages of relatively simple design and manufacture, low cost, simple overall structure, small occupied area and convenient movement.
2) The miniature vertical wind tunnel test device is controlled by an Arduino Uno development board, and the voltage is filtered and modulated to obtain the initial wind speed which is stable along with the time; the rotation speed of the fan is directly displayed on the liquid crystal screen by coarse adjustment through the large knob and fine adjustment through the small knob; the control resolution of the control device can reach 0.01m/s, and the wind speed control is accurate and convenient.
3) The spiral thin metal coil pipe with dense small holes distributed above is arranged in the middle of the diffusion section of the miniature vertical wind tunnel test device, and the spiral structure of the coil pipe can enable smoke to uniformly fill the whole diffusion section cylinder, so that three-dimensional flow field display can be realized.
4) In the contraction section of the miniature vertical wind tunnel test device, a contraction curve does not adopt a bicubic curve commonly adopted in a conventional low-speed wind tunnel, but adopts a more appropriate Vickers curve; researches show that the outlet overshoot of the Vickers curve to the extremely-low-speed wind tunnel is small, and the flow field quality is remarkably improved.
5) The whole stable section of the miniature vertical wind tunnel test device adopts the layout of the damping net-the honeycomb device-the damping net, and compared with the traditional stable section structure, the miniature vertical wind tunnel test device can effectively reduce the turbulence degree.
Drawings
FIG. 1 is a schematic view of the overall structure of a micro vertical wind tunnel test device;
FIG. 2 is a circuit diagram of an Arduino Uno development board;
FIG. 3 is a schematic top view of a diffuser section;
FIG. 4 is a schematic structural view of a damping net and a connecting flange;
FIG. 5 is a longitudinal cross-sectional view of the constrictor;
FIG. 6 is a comparison of the Vickers curve profile (a) and the bicubic curve profile (b);
in the figure: the device comprises a control device (1), a power element (2), a diffusion section (3), a stabilization section (4), a honeycomb device (5), a first damping net (61), a second damping net (62), a third damping net (63), a contraction section (7) and a support (8).
Detailed Description
The invention will be further elucidated and described with reference to the drawings and the detailed description. The technical features of the embodiments of the present invention can be combined correspondingly without mutual conflict.
As shown in fig. 1, the miniature vertical wind tunnel test device for low turbulence and extremely low speed airflow provided by the invention is of a cylindrical direct current open type as a whole, has an axis perpendicular to a horizontal plane, and comprises a control device 1, a diffusion section 3, a stabilization section 4 and a contraction section 7. The diffusion section decelerates the airflow from the power element, and the low-speed airflow rectification effect is better; the stabilizing section is used for crushing the vortex in the airflow from the diffusing section and guiding the airflow straight, so that the turbulence degree is directly reduced; the contraction section accelerates the air flow from the stabilization section, further reduces the turbulence degree and improves the flow field quality. The structure and connection of the respective portions will be specifically described below.
Controlling means 1 includes Arduino Uno development board, control panel, power component 2 and display screen, and Arduino Uno development board passes through the circuit and is connected with control panel, power component 2 and display screen respectively. During practical application, can be with control panel and display screen beading on Arduino Uno development board to make its control structure as an organic whole. The circuit diagram of the Arduino Uno development board is shown in fig. 2, and is connected with the power element 2 through a four-wire interface, and the Arduino Uno development board is mainly used for filtering and modulating voltage so as to obtain stable initial wind speed over time. The control panel is provided with a coarse adjustment knob for coarse adjustment and a fine adjustment knob for fine adjustment, and the coarse adjustment knob and the fine adjustment knob adjust the rotating speed of the power element 2 through the Arduino Uno development board. In practical applications, in order to distinguish the coarse adjustment knob from the fine adjustment knob, the coarse adjustment knob may be set to be larger than the fine adjustment knob. The display screen can adopt a liquid crystal display screen and is used for directly displaying the rotating speed of the power element 2, so that the rotating speed condition of the power element 2 adjusted by the coarse adjusting knob and the fine adjusting knob can be visually displayed. The power element 2 can be an ARCTIC P12 direct current fan, and the fan has the characteristics of extremely low starting rotating speed, stable wind pressure and low noise. In the embodiment, the stepless regulation of the obtained wind speed can be realized through the regulation effect of the coarse regulation knob and the fine regulation knob, so that the maximum wind speed is 5m/s, and the minimum resolution can reach 0.01 m/s.
The bottom of the diffuser section 3 is connected with the control device 1, and the airflow can be stably conveyed to the bottom of the diffuser section 3 through the action of the control device 1. The diffuser section 3 is a cylindrical structure with an upper opening and a lower opening, and the inner diameter of the diffuser section in the horizontal direction gradually increases from bottom to top and is funnel-shaped. In order to ensure that the diffuser section 3 has a small influence on the airflow, the inner wall of the diffuser section 3 may be provided with a smooth structure, so as to reduce the influence on the wind speed caused by friction. As shown in fig. 3, a spiral coil pipe gradually reduced from bottom to top is arranged inside the diffusion section 3, the diameter of the bottom of the coil pipe is the same as that of the inner wall of the diffusion section 3 at the bottom of the coil pipe, that is, the air flow at the horizontal plane of the bottom of the coil pipe can flow through the bottom of the coil pipe. Two ports of the coil pipe all run through the side wall of the barrel of the diffusion section 3 and are located outside the diffusion section 3, one port located at the bottom is communicated with the smoke generator, and the other end is in direct contact with the air and conveys smoke in the smoke generator phase coil pipe. The top of the coil pipe is uniformly provided with a plurality of holes along the length direction (namely the direction of the holes is vertical to the horizontal plane and faces upwards), and the intervals between adjacent holes are the same, so that the smoke generated by the smoke generator can escape upwards through the holes.
Due to the spiral structure of the coil pipe, smoke can be uniformly filled in the whole barrel body of the diffusion section 3, and therefore three-dimensional flow field display can be achieved. Meanwhile, the coil structure is arranged before the stabilizing section 4, so that the escaping flow velocity of smoke cannot influence the velocity of airflow, and further the quality of an outlet flow field is not influenced. In order to make the flow field display more clear and accurate, the coil may be disposed at the middle portion inside the diffuser section 3, and the height is set to be half of the height of the diffuser section 3.
In practical application, the spiral coil pipe can be a thin metal pipe with the pipe diameter of 300mm, and the diffusion section 3 is made of resin materials through 3D printing.
The top of the diffuser section 3 is coaxially and hermetically connected with a stabilizing section 4 through a flange, and the diffuser section 3 and the stabilizing section 4 are communicated with each other. The stabilizing section 4 is a vertical cylindrical structure with an upper opening and a lower opening, and the interior of the stabilizing section is sequentially provided with a first damping net 61, a honeycomb device 5, a second damping net 62 and a third damping net 63 from top to bottom. The first damping net 61, the honeycomb 5, the second damping net 62, and the third damping net 63 are all horizontally disposed, and the intervals between the four are the same. In the present embodiment, the intervals between the first damping mesh 61, the honeycomb 5, the second damping mesh 62 and the third damping mesh 63 are all 100 cm.
The first damping net 61, the honeycomb 5, the second damping net 62 and the third damping net 63 can completely cover the inside of the stable section 4, namely, after the airflow enters the stable section 4 from the diffusion section 3, the airflow can flow out under the action of the first damping net 61, the honeycomb 5, the second damping net 62 and the third damping net 63.
In order to ensure that the influence of the stable section 4 on the airflow is small, the inner wall of the stable section 4 can be set to be a smooth structure, so that the influence on the wind speed caused by friction is reduced. In this embodiment the stabilizing section 4 is made of plexiglass in order to ensure good wall smoothness.
The honeycomb device 5 can adopt a hexagonal honeycomb device, under the condition of low wind speed, the honeycomb device in the shape has the functions of good straight air flow guiding and vortex size reduction, and the hexagonal caliber beta and the height L of the honeycomb device meet the relation: l/β is 10. The material of the honeycomb unit 5 was aluminum foil with a thickness of 0.06 mm. The first damping net 61, the second damping net 62 and the third damping net 63 are all made of 18-mesh stainless steel damping nets with mesh diameters of 0.23 mm. In this embodiment, as shown in fig. 4, the first damping net 61, the second damping net 62, and the third damping net 63 are all connected to the inner wall of the stable section 4 by externally connecting flanges, that is, the first damping net 61, the second damping net 62, and the third damping net 63 are connected to the flanges by welding, and the flanges and the honeycomb device 5 are connected to the inner wall of the stable section 4 by bolts.
The top of the stabilizing section 4 is coaxially and hermetically connected with a contracting section 7 through a flange, and the stabilizing section 4 is communicated with the contracting section 7. The contraction section 7 is of a Vickers curve structure with a smooth inner wall and an upper opening and a lower opening, and gradually contracts from bottom to top. In order to ensure that the constriction 7 has a small influence on the air flow, the inner wall of the constriction 7 may be provided with a smooth structure, so as to reduce the influence on the wind speed caused by friction. In the present embodiment, the constriction 7 is made of a resin material by 3D printing in order to ensure good smoothness of the inner wall. As shown in fig. 5, the shrinkage curve of the shrinkage section 7 adopts a vickers curve, and the curve equation of the vickers curve is as follows:
in the formula, HiIs the inlet radius of the contraction section, HoIs the exit radius of the contraction section,
L is the length of the constriction, and h is the radius of the section at any x. In this embodiment, the contraction section adopts open export, and export diameter is greater than 200mm and sets up the ring flange, is convenient for external airtight test section.
In practical application, in order to facilitate the integral movement of the device, the vertical wind tunnel test device can be integrally fixed on the support 8, meanwhile, a plurality of pulleys with locking limiting devices are arranged on the base of the support 8, and the support is moved through the pulleys, so that the integral movement of the test device is realized.
Example 1
The embodiment provides a miniature vertical wind tunnel test device for low-turbulence extremely-low-speed airflow, the structure of the device is the same as that of the device, and the specific dimensions are as follows:
the diameter of the inlet of the diffusion section is 100mm, the diameter of the outlet is 300mm, and the length is 300 mm; the diameter of the stable section is 300mm, the total length is 400mm, the distance between the honeycomb device and each layer of damping net is 100mm, the honeycomb device material is 0.06mm aluminum foil, and the damping net wire material is 18 meshes of stainless steel with the diameter of 0.23 mm; the diameter of the inlet of the contraction section is 300mm, the diameter of the outlet is 200mm, and the length is 300 mm; the height of the bracket is 800 mm; the total height of the wind tunnel is not more than 1400mm, and the total diameter is not more than 500 mm.
Example 2
Because the traditional low-speed wind tunnel adopts the arrangement mode that the outlet of the diffusion section is directly connected with the honeycomb device and the multilayer damping net cloth is arranged behind the honeycomb device. To verify the turbulence reduction performance of the diffuser section of the present invention, the following experiment was performed using a conventional low speed wind tunnel and the apparatus of example 1:
the wind speed of a circular area at the outlet (the diameter is 15cm) of the contraction section of the two wind tunnel devices is measured by using a hot wire velocimeter, other structures are not changed, and the maximum turbulence degree (0.8%) of the stable section adopting the traditional arrangement mode is greater than the maximum turbulence degree (0.2%) under the arrangement mode of the wind tunnel device. Meanwhile, researches show that on the basis of the structure of the invention, the number of layers of the damping net behind the honeycomb device is increased, and the turbulence degree is reduced. Therefore, the whole stable section 4 of the invention adopts the layout of the damping net-the honeycomb device-the damping net, thereby realizing the function of effectively reducing the turbulence.
Example 3
In order to verify the capability of the contraction section of the invention to improve the flow field quality, the following experiment was carried out using a conventional low-speed wind tunnel and the device of example 1:
as shown in fig. 6, a bicubic curve commonly adopted in a conventional low-speed wind tunnel and a vickers curve adopted by the present invention are simulated by using a numerical calculation method under the condition of extremely low-speed wind (inlet wind speed 0.1m/s), and it is found that the wind speed profile of the vickers curve of the present invention is significantly smoother, the outlet overshoot is smaller, and the present invention has a more significant effect on improving the flow field quality.
Therefore, the contraction section of the invention adopts the Vickers curve, and better flow field quality can be obtained.
The miniature vertical wind tunnel test device has the advantages of simple design and manufacture, convenient movement, accurate and convenient wind speed control, extremely low starting wind speed, low turbulence degree and the like, can be used for displaying three-dimensional flow fields of microminiature organisms and aircrafts, and is mainly used for wind tunnel tests.
The above-described embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, the technical scheme obtained by adopting the mode of equivalent replacement or equivalent transformation is within the protection scope of the invention.
Claims (10)
1. A micro vertical wind tunnel test device for low-turbulence extremely-low-speed airflow is characterized by comprising a diffusion section (3), a stable section (4) and a contraction section (7) which are coaxially and hermetically connected and communicated in sequence from bottom to top; the diffusion section (3) is externally connected with a control device (1) capable of steplessly adjusting the wind speed, and airflow is stably conveyed to the bottom of the diffusion section (3) through the control device (1);
the diffusion section (3) is of a cylindrical structure with a smooth inner wall and an upper opening and a lower opening, and the inner diameter of the diffusion section is gradually increased from bottom to top; a spiral coil pipe with the diameter of the spiral line gradually reduced from bottom to top is arranged in the diffusion section (3), and the diameter of the bottom of the coil pipe is the same as that of the inner wall of the diffusion section (3) at the bottom; two ports of the coil pipe are positioned outside the diffusion section (3), and the port positioned at the bottom is communicated with the smoke generator; the top of the coil pipe is uniformly provided with a plurality of holes along the length direction, so that smoke generated by the smoke generator can escape through the holes;
the stabilizing section (4) is of a vertical cylindrical structure with a smooth inner wall and an upper opening and a lower opening, and a first damping net (61), a honeycomb device (5), a second damping net (62) and a third damping net (63) which have the same interval and completely cover the cross section of the stabilizing section (4) are horizontally arranged in the stabilizing section from bottom to top;
the contraction section (7) is of a structure with a smooth inner wall and an upper opening and a lower opening, gradually contracts from bottom to top, and is formed by rotating a Vickers curve around a central shaft.
2. The miniature vertical wind tunnel test device according to claim 1, wherein the control device (1) comprises an Arduino Uno development board, a control panel, a power element (2) and a display screen, and the Arduino Uno development board is respectively connected with the control panel, the power element (2) and the display screen through lines; the Arduino Uno development board is used for carrying out filter modulation on voltage so as to obtain an initial wind speed which is stable along with time; the control panel is provided with a coarse adjusting knob and a fine adjusting knob and is used for adjusting the rotating speed of the power element (2) through the Arduino Uno development board; the power element (2) is a device for providing air flow; the control device (1) can provide a maximum wind speed of 5m/s and a minimum resolution of 0.01 m/s.
3. The miniature vertical wind tunnel test device according to claim 2, wherein the power element (2) is an ARCTIC P12 DC fan.
4. The miniature vertical wind tunnel test device according to claim 1, wherein the honeycomb device (5) is a hexagonal honeycomb device, and the hexagonal caliber β and the honeycomb device height L satisfy the relationship: l/β is 10; the material of the honeycomb device (5) adopts an aluminum foil with the thickness of 0.06 mm.
5. The miniature vertical wind tunnel test device according to claim 1, wherein the first damping net (61), the second damping net (62) and the third damping net (63) are all made of 18-mesh stainless steel damping nets with mesh diameter of 0.23 mm.
6. The miniature vertical wind tunnel test device according to claim 1, wherein the first damping net (61), the honeycomb (5), the second damping net (62) and the third damping net (63) are all spaced by 100 cm; the first damping net (61), the second damping net (62) and the third damping net (63) are connected with the inner wall of the stabilizing section (4) in a mode of external flange plates.
7. The miniature vertical wind tunnel test device according to claim 1, wherein the helical coil is a metal tube with a tube diameter of 300 mm; the coil is positioned in the middle part of the inner part of the diffusion section (3), and the height of the coil is half of the height of the diffusion section (3).
8. The miniature vertical wind tunnel test device according to claim 1, wherein the diffusion section (3) and the contraction section (7) are both made of resin materials through 3D printing, and the stabilization section (4) is made of organic glass; the diffusion section (3), the stabilizing section (4) and the contraction section (7) are connected by flanges.
9. The miniature vertical wind tunnel test device according to claim 1, wherein the vertical wind tunnel test device is integrally fixed on a support (8), a base of the support (8) is provided with a plurality of pulleys for movement, and the pulleys are provided with locking limiting devices.
10. The miniature vertical wind tunnel test device according to claim 1, wherein the diffuser section (3) has an inlet diameter of 100mm, an outlet diameter of 300mm and a length of 300 mm; the diameter of the stabilizing section (4) is 300mm, and the total length is 400 mm; the inlet diameter of the contraction section (7) is 300mm, the outlet diameter is 200mm, and the length is 300 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110241409.2A CN113029496B (en) | 2021-03-04 | 2021-03-04 | Miniature vertical wind tunnel test device for low-turbulence extremely-low-speed airflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110241409.2A CN113029496B (en) | 2021-03-04 | 2021-03-04 | Miniature vertical wind tunnel test device for low-turbulence extremely-low-speed airflow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113029496A true CN113029496A (en) | 2021-06-25 |
| CN113029496B CN113029496B (en) | 2022-06-21 |
Family
ID=76467696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110241409.2A Active CN113029496B (en) | 2021-03-04 | 2021-03-04 | Miniature vertical wind tunnel test device for low-turbulence extremely-low-speed airflow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113029496B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323071A (en) * | 2021-12-27 | 2022-04-12 | 武汉航空仪表有限责任公司 | Heating life test device and method for vane sensor |
| CN115078770A (en) * | 2022-07-01 | 2022-09-20 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Extremely low wind speed calibration system |
| CN116973068A (en) * | 2023-09-19 | 2023-10-31 | 中国航空工业集团公司沈阳空气动力研究所 | Rectifying device for wind tunnel |
| CN117686177A (en) * | 2024-02-04 | 2024-03-12 | 中国航空工业集团公司沈阳空气动力研究所 | Hypersonic wind tunnel stabilizing section rectifying device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6083110A (en) * | 1998-09-23 | 2000-07-04 | Sky Venture, Inc. | Vertical wind tunnel training device |
| CN1851434A (en) * | 2006-06-06 | 2006-10-25 | 刘晓萌 | Power system lower vertical wind tunnel |
| CN203483845U (en) * | 2013-07-19 | 2014-03-19 | 王仲年 | Vertical wind tunnel with wind power gathering effect |
| CN109916587A (en) * | 2019-03-23 | 2019-06-21 | 国电环境保护研究院有限公司 | A kind of double test section direct current gust wind tunnels |
| CN111346389A (en) * | 2020-03-10 | 2020-06-30 | 中国航天空气动力技术研究院 | Medium-sized direct current type entertainment wind tunnel |
-
2021
- 2021-03-04 CN CN202110241409.2A patent/CN113029496B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6083110A (en) * | 1998-09-23 | 2000-07-04 | Sky Venture, Inc. | Vertical wind tunnel training device |
| CN1851434A (en) * | 2006-06-06 | 2006-10-25 | 刘晓萌 | Power system lower vertical wind tunnel |
| CN203483845U (en) * | 2013-07-19 | 2014-03-19 | 王仲年 | Vertical wind tunnel with wind power gathering effect |
| CN109916587A (en) * | 2019-03-23 | 2019-06-21 | 国电环境保护研究院有限公司 | A kind of double test section direct current gust wind tunnels |
| CN111346389A (en) * | 2020-03-10 | 2020-06-30 | 中国航天空气动力技术研究院 | Medium-sized direct current type entertainment wind tunnel |
Non-Patent Citations (2)
| Title |
|---|
| 刘海洋等: "可移动微型低速风洞的设计与试验", 《农机化研究》 * |
| 荣臻等: "小型鸟类及昆虫飞行气动特性测试风洞设计及流场校测", 《实验室研究与探索》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323071A (en) * | 2021-12-27 | 2022-04-12 | 武汉航空仪表有限责任公司 | Heating life test device and method for vane sensor |
| CN115078770A (en) * | 2022-07-01 | 2022-09-20 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Extremely low wind speed calibration system |
| CN115078770B (en) * | 2022-07-01 | 2023-04-28 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Extremely low wind speed calibration system |
| CN116973068A (en) * | 2023-09-19 | 2023-10-31 | 中国航空工业集团公司沈阳空气动力研究所 | Rectifying device for wind tunnel |
| CN117686177A (en) * | 2024-02-04 | 2024-03-12 | 中国航空工业集团公司沈阳空气动力研究所 | Hypersonic wind tunnel stabilizing section rectifying device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113029496B (en) | 2022-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113029496B (en) | Miniature vertical wind tunnel test device for low-turbulence extremely-low-speed airflow | |
| CN207215423U (en) | A kind of subsonic wind tunnel | |
| JP5864450B2 (en) | Circulating vertical wind tunnel skydiving simulator | |
| Arifuzzaman et al. | Design construction and performance test of a low cost subsonic wind tunnel | |
| CN104897406A (en) | Rotary stamping compressed rotor plane cascade experimental system | |
| CN111307394B (en) | Multistage power controllable backflow type wind tunnel | |
| CN105550467A (en) | Building method of wall surface flowing model of high-speed wind tunnel inclined hole wall | |
| CN112556969A (en) | Wind tunnel for testing photovoltaic solar system | |
| CN115468731A (en) | Device for simulating non-stable wind field based on air volume adjustment | |
| US7249614B2 (en) | Structure and method for improving flow uniformity and reducing turbulence | |
| Ward-Smith et al. | Flow regimes in wide-angle screened diffusers | |
| CN208938480U (en) | A kind of wind tunnel experiment equipment for teaching | |
| CN107402113A (en) | A kind of low-speed wind tunnel experimental bench based on Particle Image Velocimetry | |
| CN110006617A (en) | Simulate the integrated wind-tunnel of mobile cyclone and downburst | |
| CN110822476A (en) | Rectification air duct system based on single cubic curve | |
| RU2681618C1 (en) | Compact device for the formation of laminar jets of a flow medium | |
| CN110006619A (en) | A kind of multi-function windtunnel for simulating disaster-ridden evil coupling | |
| CN106875789A (en) | A kind of hydrodynamics teaching experiment device | |
| US20020117224A1 (en) | Conduit bundle for controlling fluid flow | |
| CN205958191U (en) | System is regulated and control in real time in boundary layer wind tunnel test flow field based on coarse unit of wedge | |
| Ramsey | The interaction of a heated air jet with a deflecting flow | |
| Catalano | The new closed circuit wind tunnel of the aircraft laboratory of university of sao paulo, brazil | |
| RU2579303C1 (en) | Chimney-type cooling tower with descending flow of cooled liquid | |
| Matsson | Experiments on streamwise vortices in curved wall jet flow | |
| CN113670556A (en) | Tornado and downburst integrated physical simulation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |