CN112985754B - Combined cavity for flow field video and pneumatic load measurement - Google Patents
Combined cavity for flow field video and pneumatic load measurement Download PDFInfo
- Publication number
- CN112985754B CN112985754B CN202110507981.9A CN202110507981A CN112985754B CN 112985754 B CN112985754 B CN 112985754B CN 202110507981 A CN202110507981 A CN 202110507981A CN 112985754 B CN112985754 B CN 112985754B
- Authority
- CN
- China
- Prior art keywords
- connecting part
- rear end
- board
- cavity
- frame beam
- 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.)
- Active
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
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water 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)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a combined cavity for measuring flow field video and pneumatic load, which comprises a base body, wherein the base body comprises a front end and a rear end which are of an integrated structure, and a frame beam for connecting the front end and the rear end, a cavity structure is formed among the front end, the rear end and the frame beam, the front end and the rear end are provided with convex connecting parts, a function board is arranged on the frame beam between the front end and the rear end, the function board is movably connected with the side edge of the connecting part, a bottom board is arranged in the frame beam, and the bottom board is movably connected with the connecting part. The invention can be simultaneously applied to cavity unsteady pulsation pressure measurement test, flow display test, sound vibration load characteristic research and the like; the invention has simple combination mode of parts, convenient disassembly and assembly, simplified test process, shortened period and improved test efficiency.
Description
Technical Field
The invention relates to the crossing technical field of experimental hydrodynamics, aerodynamics and the like, in particular to a combined cavity for flow field video and pneumatic load measurement.
Background
The cavity structure is a typical structure commonly existing in the aerospace navigation field and industrial equipment due to the special structural form and characteristics of the cavity structure, is mainly used for goods and materials, battle weapons, power fuel storage, undercarriage storage and the like, and generally has the characteristics of multiple geometric parameters, complex structure, unconventional configuration, harsh working environment and the like. However, the cavity in the wind tunnel test is different from the structural form of simple ground equipment, and due to the complexity of a high-speed flow-surrounding structure, the change condition of the pneumatic load acting on the cavity structure is complex and sensitive to the influence of external inflow parameters.
Aiming at the problems of unsteady flow, flow-induced noise and acoustic vibration coupling in the cavity, scholars at home and abroad develop a large amount of experimental research by means of water tunnel and wind tunnel tests. The test means comprises cavity wall surface unsteady pulsation pressure measurement, PIV (particle image velocimetry), video measurement, schlieren, elastic cavity wall structure vibration measurement and the like. The test model can be classified into three types, namely a metal rigid cavity which is mainly used for measuring pulsating pressure near the wall surface of the cavity to obtain pneumatic load characteristics; secondly, the organic glass rigid cavity is mainly used for the display measurement of flow structures such as PIV, video measurement, schlieren and the like; and the elastic cavity is mainly used for researching the mutual coupling characteristic of the elastic cavity wall structure and the noise in the cavity. Therefore, different cavity test models need to be designed and processed according to different wind tunnel test contents.
However, as can be seen from many existing examples at home and abroad, the research process for specific problems often includes contents of multiple test types, but the design and the processing of the three cavity models are relatively independent, and all test contents can be completed by using multiple sets of test models to obtain pneumatic load data, so that the processing cost of the cavity model is greatly increased. Meanwhile, for different test types, the test device needs to be disassembled and assembled and the cavity model needs to be frequently replaced, so that the workload of the wind tunnel test is obviously increased; the most critical is that the flow field structure video measurement, the aerodynamic characteristics, the static pressure distribution, the noise load and the vibration response of the cavity structure are difficult to simultaneously and synchronously integrated.
Disclosure of Invention
The invention aims to design a combined cavity and solve the objective problem of the existing cavity in the test process.
In order to achieve the purpose, the invention adopts the following technical scheme:
a combined cavity for measuring flow field video and pneumatic load comprises a substrate, wherein the substrate comprises a front end and a rear end which are of an integrated structure, and a frame beam connecting the front end and the rear end, a cavity structure is formed among the front end, the rear end and the frame beam,
the front end and the rear end are respectively provided with a convex connecting part on the opposite wall surfaces, one side of the connecting part is arranged on the frame beam, the two symmetrical sides of the connecting part are respectively provided with a function board, the function board is arranged on the frame beam between the front end and the rear end, the function board is movably connected with the side edge of the connecting part,
the frame beam is internally provided with a bottom plate which is movably connected with the connecting part.
In the above technical solution, the connecting portion includes a first connecting portion disposed on the front end wall surface and a second connecting portion disposed on the rear end wall surface, the first connecting portion and the second connecting portion are coaxially and symmetrically disposed, and the function board is connected to the same side surface of the first connecting portion and the second connecting portion.
In the above technical solution, an elastic wall surface is provided between the function board and the first and second connection portions.
In the above technical solution, the function board is provided with a protruding support portion, and the elastic wall surface is of a U-shaped structure, and the support portion is connected to the elastic wall surface in a supporting manner from the inside of the U-shaped structure.
In the technical scheme, the backing plate is arranged in a gap between the supporting end face of the elastic wall face and the function plate, and the backing plate is arranged on the supporting portion.
In the above technical scheme, the mutually opposite wall surfaces of the first connecting portion and the second connecting portion are respectively provided with a convex portion, the convex portions are movably connected with connecting plates, and the connecting plates are movably connected with the convex portions.
In the technical scheme, the functional plate, the connecting plate and the bottom plate which are movably connected with the base body form a cavity used for experiments in the base body.
In the technical scheme, the function board, the connecting board and the bottom board can be separated from and replaced by the connecting part.
In the technical scheme, the base plate comprises a cover plate, and the cover plate fixes the base plate on the lower bottom surface of the base body.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the application range of research content is wide, and the method can be simultaneously applied to cavity unsteady pulsation pressure measurement tests, flow display tests, sound vibration characteristic researches and the like;
2. when the test research content is more, the test requirement can be met by replacing parts, the processing of multiple sets of models is avoided, and the combined structure can save raw materials, so that the test cost is greatly reduced;
3. the combination mode of the parts is simple, the disassembly and the assembly are convenient, the test process is simplified, the period is shortened, and the test efficiency is improved.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of the main structure of a substrate according to the present invention;
FIG. 2 is a schematic diagram of an exploded structure of the main body of the present invention;
fig. 3 is an exploded view of the overall structure of the present invention when mounted with glass.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
As shown in fig. 1, is a schematic view of the structure of the substrate in this embodiment, specifically: the base body 1 comprises a front end, a rear end and a frame beam 6 connecting the front end and the rear end, and the front end, the rear end and the frame beam 6 are of an integral structure. A cavity structure 5 is formed between the front and rear ends and the frame beams 6. The wall surface of the front end is provided with a convex first connecting part 2, the wall surface of the rear end is provided with a convex second connecting part 7, and the first connecting part 2 and the second connecting part 7 are arranged in central symmetry along the axial direction of the base body 1.
As shown in fig. 1, the top of the first connecting part 2 and the top of the second connecting part 7 are flush with the top surfaces of the front end and the rear end, and a table surface for supporting connection is formed between the left and right sides and the end surface of the connecting part and the frame beam 6.
As shown in fig. 2, the function board 12 is disposed on the same side of the first connecting portion 2 and the second connecting portion 7, the function board 12 is disposed on the frame beam 6 and movably connected to the connecting holes 4 of the first connecting portion 2 and the second connecting portion 7 through the connecting members, and the bottom plate 8 is disposed in the frame of the frame beam 6 and movably connected to the first connecting portion 2 and the second connecting portion 7 through the connecting members. The connecting plate 10 is movably connected with the inner end faces of the first connecting part 2 and the second connecting part 7 through the convex part 3. And a cavity for experiment is formed among the functional board 12, the bottom board 8 and the connecting board 10 after connection is finished.
The further structure is as follows: elastic plates 14 are arranged between the function plate 12 and the frame beam 6 and between the first connecting part 2 and the second connecting part 7, a convex supporting part 15 is arranged on the function plate 12, the elastic plates 14 are of a U-shaped structure, the supporting part 15 is in supporting connection from the inside of the U-shaped of the elastic plates 14, and the elastic plates 14 are movably connected to the supporting part 15. After the elastic plate 14 is connected to the support portion 15, a gap is formed between the connection end surface of the elastic plate 14 and the function plate 12, and a pad 13 is disposed in the gap, and the pad 13 is disposed on the support portion 15.
The bottom of the base body 1 is provided with a cover plate 9, the cover plate 9 is fixedly connected to the base body 1, and the bottom plate is fixed in the middle frame beam of the base body 1 through the cover plate 9.
In this embodiment, the function board 12 can be replaced, and different test purposes can be achieved by adopting different combinations.
Example one
When only the rigid functional board 12 is connected to the two sides of the first connecting part 2 and the second connecting part 7 on the substrate 1, the whole constructed cavity can be used for cavity wall surface unsteady pulsating pressure measurement or oil flow test.
Example two
When the elastic plate 14 is combined and connected on the inner wall of the functional plate 12, the whole constructed cavity can be used for researching the mutual coupling characteristic of the elastic cavity wall and the noise in the cavity
EXAMPLE III
As shown in fig. 3, when the functional plate 12 and the elastic plate 14 are replaced with the transparent organic glass plate 11, the whole constructed cavity can be used for displaying and measuring the flow structure, so that the device can be applied to PIV test, schlieren test, video measurement test and the like.
The research content of the embodiment has wide application range, and can be simultaneously applied to cavity unsteady pulsating pressure measurement tests, flow display tests, sound vibration characteristic researches and the like.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (7)
1. A combination formula cavity that is used for flow field video and pneumatic load to measure which characterized in that: comprises a substrate, wherein the substrate comprises a front end and a rear end which are integrated into a whole, and a frame beam connecting the front end and the rear end, a cavity structure is formed among the front end, the rear end and the frame beam,
the front end and the rear end are respectively provided with a convex connecting part on the opposite wall surfaces, one side of the connecting part is arranged on the frame beam, the two symmetrical sides of the connecting part are respectively provided with a function board, the function board is arranged on the frame beam between the front end and the rear end, the function board is movably connected with the side edge of the connecting part,
the connecting part comprises a first connecting part arranged on the front end wall surface and a second connecting part arranged on the rear end wall surface, the first connecting part and the second connecting part are coaxially and symmetrically arranged, the function board is connected on the same side surface of the first connecting part and the second connecting part,
the mutually opposite wall surfaces of the first connecting part and the second connecting part are respectively provided with a convex part, the convex parts are movably connected with a connecting plate, the connecting plate is movably connected with the convex parts,
the frame beam is internally provided with a bottom plate which is movably connected with the connecting part.
2. A combined chamber for flow field video and pneumatic load measurement according to claim 1, wherein: and an elastic wall surface is arranged between the function board and the first connecting part and between the function board and the second connecting part.
3. A combined chamber for flow field video and pneumatic load measurement according to claim 2, wherein: the function board is provided with a convex supporting part, the elastic wall surface is of a U-shaped structure, and the supporting part is connected with the elastic wall surface in a supporting mode from the inside of the U-shaped structure.
4. A combined chamber for flow field video and pneumatic load measurement according to claim 3, wherein: a backing plate is arranged in a gap between the support end face of the elastic wall face and the function plate, and the backing plate is arranged on the support portion.
5. The combined chamber of claim 1, comprising a cover plate that secures the bottom plate to the bottom surface of the base.
6. A combined chamber for flow field video and pneumatic load measurement according to any of claims 1-5, wherein: the function board, the connecting board and the bottom board which are movably connected with the base body form a cavity used for experiments in the base body.
7. A combined chamber for flow field video and pneumatic load measurement according to claim 6, wherein: the function board, the connecting board and the bottom board can be separated from and replaced by the connecting part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110507981.9A CN112985754B (en) | 2021-05-11 | 2021-05-11 | Combined cavity for flow field video and pneumatic load measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110507981.9A CN112985754B (en) | 2021-05-11 | 2021-05-11 | Combined cavity for flow field video and pneumatic load measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112985754A CN112985754A (en) | 2021-06-18 |
| CN112985754B true CN112985754B (en) | 2021-07-23 |
Family
ID=76337462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110507981.9A Active CN112985754B (en) | 2021-05-11 | 2021-05-11 | Combined cavity for flow field video and pneumatic load measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112985754B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046874B (en) * | 2022-01-11 | 2022-03-18 | 中国空气动力研究与发展中心高速空气动力研究所 | Test device for measuring supersonic jet near-field noise |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4663967A (en) * | 1985-06-14 | 1987-05-12 | Dei-East Inc. | Air flow system bypassing a balance in a model airplane being tested in a wind tunnel |
| JPH07218383A (en) * | 1994-02-04 | 1995-08-18 | Ishikawajima Harima Heavy Ind Co Ltd | Method and apparatus for placing model in supersonic wind tunnel |
| CN106840596A (en) * | 2016-11-24 | 2017-06-13 | 中国空气动力研究与发展中心高速空气动力研究所 | One kind is applied to Asia across supersonic Cavity Flow model in wind tunnel |
| CN107869498A (en) * | 2016-09-26 | 2018-04-03 | 中国空气动力研究与发展中心高速空气动力研究所 | A kind of supersonic speed Cavity Flow control method based on disturbed motion shock wave |
| CN110160739A (en) * | 2019-03-25 | 2019-08-23 | 北京机电工程研究所 | High-frequency vibration unsteady aerodynamic force generation device |
| CN110907122A (en) * | 2019-11-19 | 2020-03-24 | 中国人民解放军国防科技大学 | Laser sheet light deflection device and wind tunnel optical measurement experiment system |
| CN211783838U (en) * | 2020-05-07 | 2020-10-27 | 中国船舶科学研究中心 | Fluid dynamic oscillation and intracavity acoustic medium standing wave coupling resonance testing device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100575900C (en) * | 2005-12-30 | 2009-12-30 | 大连理工大学 | A kind of multifunctional gas wave refrigerating jet stream field displaying apparatus and measuring method |
| CN109632241B (en) * | 2018-12-14 | 2021-04-13 | 中国航天空气动力技术研究院 | Method for preventing impact damage of pressure measuring rake in ventilation and force measuring wind tunnel test |
| CN110287643B (en) * | 2019-07-09 | 2023-04-07 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel experiment simulation method for cavity flow-induced vibration and flow-induced noise coupling characteristic |
-
2021
- 2021-05-11 CN CN202110507981.9A patent/CN112985754B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4663967A (en) * | 1985-06-14 | 1987-05-12 | Dei-East Inc. | Air flow system bypassing a balance in a model airplane being tested in a wind tunnel |
| JPH07218383A (en) * | 1994-02-04 | 1995-08-18 | Ishikawajima Harima Heavy Ind Co Ltd | Method and apparatus for placing model in supersonic wind tunnel |
| CN107869498A (en) * | 2016-09-26 | 2018-04-03 | 中国空气动力研究与发展中心高速空气动力研究所 | A kind of supersonic speed Cavity Flow control method based on disturbed motion shock wave |
| CN106840596A (en) * | 2016-11-24 | 2017-06-13 | 中国空气动力研究与发展中心高速空气动力研究所 | One kind is applied to Asia across supersonic Cavity Flow model in wind tunnel |
| CN110160739A (en) * | 2019-03-25 | 2019-08-23 | 北京机电工程研究所 | High-frequency vibration unsteady aerodynamic force generation device |
| CN110907122A (en) * | 2019-11-19 | 2020-03-24 | 中国人民解放军国防科技大学 | Laser sheet light deflection device and wind tunnel optical measurement experiment system |
| CN211783838U (en) * | 2020-05-07 | 2020-10-27 | 中国船舶科学研究中心 | Fluid dynamic oscillation and intracavity acoustic medium standing wave coupling resonance testing device |
Non-Patent Citations (2)
| Title |
|---|
| "内埋武器舱气动声学特性与噪声抑制研究";杨党国;《中国博士学位论文全文数据库 工程科技II辑》;20111015(第10（2011）期);全文 * |
| "空腔流动机理分析及被动流动控制技术研究";王传洲;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20130615(第09（2013）期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112985754A (en) | 2021-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104048791B (en) | A kind of diesis beam type six-dimensional force of low retinoic acid syndrome and torque sensor | |
| CN112985754B (en) | Combined cavity for flow field video and pneumatic load measurement | |
| CN103091026B (en) | Parallel structure six-dimension force sensor | |
| CN109632159B (en) | Six-dimensional force and moment sensor | |
| CN205228620U (en) | Probe -type sensing module of testing vibration | |
| CN101738250B (en) | T-shaped sensitive body of vector hydrophone | |
| CN100487461C (en) | Metal capacitance microaccelerator | |
| CN102636162A (en) | Three-axis micro-mechanical gyroscope | |
| CN103969021A (en) | Aircraft propeller thrust and torque measuring balance | |
| CN103941041A (en) | Single-mass-block three-axis MEMS accelerometer with three frame structures | |
| CN106840590B (en) | A kind of five component dynamic pitching balance of miniaturized large-load integral type | |
| CN109297672B (en) | Pitching yawing forced vibration dynamic derivative test device suitable for Mach number of 8.0 | |
| CN106181200B (en) | A kind of forklift frame body joint welding mold | |
| CN106940243B (en) | Six-component measuring balance and model for wind tunnel experiment | |
| CN104375360A (en) | High-stable and semi-flexible supporting structure for secondary lens of space camera | |
| CN110082062B (en) | Blunt body split structure model for automobile wind tunnel experimental research | |
| CN2359684Y (en) | Frame type three-D force transducer | |
| CN203534742U (en) | Integrated pumping well polished rod axial force and torque sensor | |
| CN112577696B (en) | High-speed wind tunnel washing flow time difference derivative test device | |
| CN208721317U (en) | A kind of calibration loading head of six component sensor | |
| CN209979062U (en) | Vibration calibration mechanical structure | |
| CN204085647U (en) | A kind of thin-walled blind hole type column weighting sensor | |
| CN203148821U (en) | Versatile suspension test fixture based on achieving pre-load | |
| CN216361659U (en) | High-precision static three-dimensional force sensor | |
| CN207923411U (en) | It is a kind of to be used for and hang together the six component strain balance of double struts for playing CTS experiments |
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 |