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Low-speed wind tunnel double-sawtooth fixing transition tape based on vehicle sticker technology

A transition belt and technology, which is applied in the field of surface boundary layer transition of wind tunnel test models, can solve the problems of small selection range of transition belt height, inability to fit the surface well, and damage to the surface roughness of the model. Achieve the effect of improving test quality and efficiency, with a wide range of sizes and optional thicknesses

Active Publication Date: 2016-01-13
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used zigzag transition zone is often used in fighter jet test models. Due to material problems, the selection range of the height of this transition zone is small, and its additional resistance in the wind tunnel is difficult to deduct by changing the height of the transition zone, and the material is generally They are all aluminum sheets or copper skins, which are hard in texture, and cannot fit the surface well when pasting on the curved surface of the model, resulting in local protrusions that affect the transition effect, and the surface of the model needs to be pasted with 502 glue during the test, which is damaged to a certain extent. The surface roughness of the model is affected, to some extent, the flow in the boundary layer of the model is affected

Method used

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  • Low-speed wind tunnel double-sawtooth fixing transition tape based on vehicle sticker technology
  • Low-speed wind tunnel double-sawtooth fixing transition tape based on vehicle sticker technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] Such as figure 1 , figure 2 As shown, considering that in the actual wind tunnel test, the overall thickness of the transition zone needs to be between 0.1mm and 0.3mm, the thickness of each layer of PVC film in the transition zone is designed to be 0.01mm, and the adhesive PVC film is designed as Colored PVC film, the anti-adhesive PVC film is designed as a transparent PVC film to show the difference.

[0032]When in use, when the tested model needs to paste a certain thickness of the transition belt, by calculating the number of layers of PVC film, the thickness of the tear can be precisely controlled, and it can be pressed and pasted on the tested model. When it is necessary to paste the transition belt with an even thickness, such as 0.12mm and 0.24mm, then tear off the protective layer from the bottom of the entire transition belt, and then press and stick the entire transition belt on the model under test. Then count the even-numbered layers from the bottom lay...

Embodiment approach 2

[0035] On the basis of Embodiment 1, the transition zone of the present invention is further improved, because the actual required thickness of the transition zone is between 0.1 mm and 0.3 mm, then the top layer and the top layer of the entire transition zone can be designed as 0.09mm, and the other layers between the top layer and the bottom layer are still designed to be 0.01mm, so that the waste of layers between 0.01mm and 0.09mm can be reduced, making the transition zone design more reasonable.

[0036] The specific usage steps are the same as the first embodiment. According to the thickness of the transition belt to be pasted, consider whether to tear it from the bottom layer or from the top layer, and then subtract the 0.09mm of the top layer or bottom layer from the actual thickness to get the required number of other layers. , to achieve high-precision thickness control.

Embodiment approach 3

[0038] Of course, without considering the processing cost, the transition belt can be designed as one layer, and several transition belts with different thicknesses can be designed according to the thickness of the paste. When a transition belt with a certain thickness is required, the transition belt can be directly The protective layer is torn off, and the transition belt can be pasted on the model.

[0039] The advantage of this method is that there is no need to calculate the number of layers, just paste it directly according to the thickness, but the disadvantage is that the design requires several molds to process PVC films of different thicknesses. loaded down with trivial details, and production cost obviously improves.

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Abstract

The invention discloses a low-speed wind tunnel double-sawtooth fixing transition tape based on the vehicle sticker technology. The transition tape is in the shape of a long strip, a long edge of the long strip is zigzag, the thickness of the transition tape is between 0.10mm and 0.30mm, the transition tape is composed of a plurality of layers, the number of the layers is an odd number, the upper and lower surfaces of other odd layers between the bottom layer and the top layer except for the upper surface of the top layer which is a smooth surface are respectively provided with an adhesion layer, the upper and lower surface of even layers are respectively provided with an anti-adhesion layer, the thickness of each layer is between 0.01mm and 0.10mm, the surface of the bottom layer of the transition tape is provided with a protection layer, and layers, including a protective layer, of the transition layer are separable. The transition tape uses vehicle sticker preparation process for reference, and has the advantages of high practicality, the unique profile, high precision and the large selectable size range.

Description

technical field [0001] The invention relates to the field of boundary layer transition on the surface of a wind tunnel test model, in particular to a low-speed wind tunnel double-saw-tooth fixed transition belt based on vehicle sticker technology. Background technique [0002] When a real aircraft is flying in the air, due to the high flying Reynolds number, the boundary layer on the surface of each part of the aircraft is almost all in a turbulent state. In the wind tunnel test, due to the relatively low test Reynolds number, there is a rather long section of laminar boundary layer on the surface of the model, which causes a large difference between the state of the boundary layer on the model surface and the real aircraft. This difference complicates and irregularizes the influence of Reynolds number in wind tunnel tests. If the method of artificially fixing the transition of the boundary layer is adopted during the model test, so that the boundary layer on the surface of...

Claims

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Application Information

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IPC IPC(8): G01M9/04
Inventor 张鹏倪章松杨晓娟陈洪李进学范利涛张晖李士伟任章滔谢琦付华万琪明蒋科林马国辉江鲲鹏路正祝明红姜裕标
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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