CN207717326U - A kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device - Google Patents
A kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device Download PDFInfo
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- CN207717326U CN207717326U CN201820063793.5U CN201820063793U CN207717326U CN 207717326 U CN207717326 U CN 207717326U CN 201820063793 U CN201820063793 U CN 201820063793U CN 207717326 U CN207717326 U CN 207717326U
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- air inlet
- inlet pipe
- layer thickness
- measuring device
- boundary layer
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Abstract
The utility model discloses a kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring devices, including flat plate model and the rake aody vertical with flat plate model, several air inlet pipe and an air outlet pipes are provided in the rake aody, several air inlet pipe do not stay gap per close-packed arrays between any two；Using the measuring device of this programme, the distribution of pressure measurement pipeline is finer and close, and measurement is finer, simple in structure, occupies little space, and has higher reliability；Avoid the state because of two pore spacing larger impact Inlet-air Velocity Distributions.
Description
Technical field
The invention belongs to field of aerospace technology, and in particular to a kind of dense form dummy vehicle airflow on surface boundary-layer
Measurer for thickness.
Background technology
When air-flow is flowed through from dummy vehicle surface, there is one layer of very thin air-flow attached face close to dummy vehicle surface
Layer.This layer of inside, the viscous effect of fluid is notable, causes air-flow larger along the velocity gradient of surface normal, velocity variations are bright
It is aobvious；Air-flow other than boundary-layer is weaker by object Wall effect, normal direction and to flow to speed also smaller by Wall effect.Because of boundary-layer
It is close to body surface, especially boundary layer thickness and form directly affects the flow behavior in aircraft near wall region, to flight
The aerodynamic characteristics such as device lift, resistance influence also very big.For a long time, boundary layer thickness how is more accurately measured, always
It is one of the direction that aerodynamic investigation field is made great efforts.Currently, relying primarily on pressure measurement rake during experiment measures aircraft surface
The pressure of different height, and the distribution by formula calculated gas flow speed in normal direction, to extrapolate boundary layer thickness.However
The diameter of pressure-measuring pipe and gap are larger in existing pressure measurement rake device, thus the measurement accuracy of flow field parameter is relatively low, the attached face of gained
Layer thickness is rougher.
Invention content
The object of the present invention is to provide a kind of dense form friction layer measurer for thickness, fly for more fine measure
It is more coarse to solve the problems, such as that current test method measures boundary layer thickness for row device model surface friction layer thickness.
To achieve the goals above, the present invention adopts the following technical scheme that:
A kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device, including flat plate model and and tablet
Model vertical rake aody is provided with several air inlet pipe and an air outlet pipes in the rake aody, and several air inlet pipe are per tight between any two
Solid matter row do not stay gap.
In the above-mentioned technical solutions, in several air inlet pipe and an air outlet pipes, an air inlet pipe independently corresponds to an outlet
Pipe.
In the above-mentioned technical solutions, an air inlet pipe and the pipeline center line of escape pipe and the axis of rake aody are flat
Row, air inlet pipe are penetrated from a side of rake aody, are pierced by to side as escape pipe.
In the above-mentioned technical solutions, the air inlet pipe and escape pipe single-row arrangement from top to bottom.
In the above-mentioned technical solutions, the internal diameter of the air inlet pipe is 0.2-0.4mm, and the outer diameter of the air inlet pipe is 0.4-
0.6mm。
In the above-mentioned technical solutions, leading edge of the air inlet tube inlet apart from rake aody is less than 20mm.
In the above-mentioned technical solutions, the thickness of the rake aody is not less than 2mm.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
Using the measuring device of this programme, the distribution of pressure measurement pipeline is finer and close, measures finer, simple in structure, occupancy
Space is small, has higher reliability；Avoid the state because of two pore spacing larger impact Inlet-air Velocity Distributions.
Description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is the structural schematic diagram of measuring device；
Wherein：1 is air inlet pipe, and 2 be rake aody, and 3 be escape pipe, and 4 be flat plate model, and 5 be direction of flow, and 6 be fixing screws.
Specific implementation mode
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
As shown in Fig. 1, the air inlet pipe and an air outlet pipe in this programme is round tube, and plastic tube, which may be used, to be used
Metal tube uses stainless steel tube under normal circumstances.It is provided with several through-holes in rake aody, is penetrated from a side from another offside
Face is pierced by, and air inlet pipe and an air outlet pipe is fixed by adhesive and rake aody close installation.During the installation process, air inlet pipe and rake aody
It is cannot have any gap between perforation, because the presence in gap can influence flow field state.
Air inlet pipe after installation is communicated with escape pipe one-to-one correspondence, and an air inlet pipe is managed after being connected to an escape pipe
Road communicates completely, and the central axis of pipeline is parallel with the axis of rake aody.Be provided in rake aody it is several into
Tracheae and escape pipe, from top to bottom at single-row arrangement, often close-packed arrays between adjacent two air inlet pipe, mutual without between
Gap.The central axis of each pipeline between air inlet pipe and escape pipe and the central axis of other air inlet pipe are parallel, and all
In conplane.
Rake aody is fixed on flat plate model by screw, after installation fixes, near flat plate model table
A piece air inlet pipe in face is tightly attached on flat plate model, and the axis of direction of flow and air inlet pipe is mutually parallel.
In order to reduce influence of the pore diameter for flow, the overall diameter of the air inlet pipe in this programme cannot general idea
0.6mm, the internal orifice dimension of air inlet pipe cannot be more than 0.4mm, be typically chosen the range of overall diameter in 0.4mm between 0.6mm, and interior
For diameter in 0.2mm between 0.4mm, it is best to select 15 to 20mm apart from rake aody leading edge for air inlet tube inlet.This size
Selection is minimum by being influenced for flow state after calculating.
The invention is not limited in specific implementation modes above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (7)
1. a kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device, including flat plate model and with tablet mould
Type vertical rake aody is provided with several air inlet pipe and an air outlet pipes in the rake aody, it is characterised in that several air inlet pipe every two
Close-packed arrays do not stay gap between two.
2. a kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device according to claim 1, special
Sign is in several air inlet pipe and an air outlet pipes that an air inlet pipe independently corresponds to an escape pipe.
3. a kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device according to claim 2, special
Sign be that an air inlet pipe and the pipeline center line of an escape pipe are parallel with the axis of rake aody, air inlet pipe from rake aody one
A side penetrates, and is pierced by to side as escape pipe.
4. a kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device according to claim 2 or 3,
It is characterized in that the air inlet pipe and escape pipe single-row arrangement from top to bottom.
5. a kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device according to claim 1, special
Sign is that the internal diameter of the air inlet pipe is 0.2-0.4mm, and the outer diameter of the air inlet pipe is 0.4-0.6mm.
6. a kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device according to claim 5, special
Sign is that leading edge of the air inlet tube inlet apart from rake aody is less than 20mm.
7. a kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device according to claim 5 or 6,
It is characterized in that the thickness of the rake aody is not less than 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820063793.5U CN207717326U (en) | 2018-01-16 | 2018-01-16 | A kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820063793.5U CN207717326U (en) | 2018-01-16 | 2018-01-16 | A kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device |
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| CN207717326U true CN207717326U (en) | 2018-08-10 |
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| CN201820063793.5U Active CN207717326U (en) | 2018-01-16 | 2018-01-16 | A kind of dense form dummy vehicle airflow on surface boundary layer thickness measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551339A (en) * | 2020-04-28 | 2020-08-18 | 中国空气动力研究与发展中心高速空气动力研究所 | Design method of special pressure measuring rake for deformed flow channel of wing-body fusion aircraft ventilation model |
| CN115839817A (en) * | 2023-02-21 | 2023-03-24 | 中国航空工业集团公司沈阳空气动力研究所 | Near-wall multi-point boundary layer measuring device and method for wing test |
-
2018
- 2018-01-16 CN CN201820063793.5U patent/CN207717326U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551339A (en) * | 2020-04-28 | 2020-08-18 | 中国空气动力研究与发展中心高速空气动力研究所 | Design method of special pressure measuring rake for deformed flow channel of wing-body fusion aircraft ventilation model |
| CN111551339B (en) * | 2020-04-28 | 2021-10-08 | 中国空气动力研究与发展中心高速空气动力研究所 | Design method of special pressure measuring rake for deformed flow channel of wing-body fusion aircraft ventilation model |
| CN115839817A (en) * | 2023-02-21 | 2023-03-24 | 中国航空工业集团公司沈阳空气动力研究所 | Near-wall multi-point boundary layer measuring device and method for wing test |
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