CN209623471U - The plug-in type vortex generators turbulent element of convective heat transfer in a kind of enhanced tube - Google Patents
The plug-in type vortex generators turbulent element of convective heat transfer in a kind of enhanced tube Download PDFInfo
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- CN209623471U CN209623471U CN201821032392.XU CN201821032392U CN209623471U CN 209623471 U CN209623471 U CN 209623471U CN 201821032392 U CN201821032392 U CN 201821032392U CN 209623471 U CN209623471 U CN 209623471U
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- 238000012546 transfer Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 4
- 230000000737 periodic effect Effects 0.000 claims abstract description 3
- 239000000758 substrate Substances 0.000 claims description 7
- 230000004323 axial length Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000005728 strengthening Methods 0.000 abstract description 3
- 239000011888 foil Substances 0.000 abstract description 2
- 230000003416 augmentation Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a kind of plug-in type vortex generators turbulent elements of convective heat transfer in enhanced tube, vortex generators turbulent element has periodic structure, by with a thickness of 0.5~2mm, it is formed by the foil of set geometric figure removal some materials by screw twisted, torsion rate range is 2.0~10.0.Shape of the vortex generators turbulent element before distortion determines that one range of angle is 25 °~90 °, and shape determines that two range of angle is 65 °~155 °.The plug-in type vortex generators turbulent element of the utility model can induce the Secondary Flow for generating larger intensity in heat exchanger tube, have many advantages, such as that structure simple, convenient processing and manufacture, the contact area for reducing twisted strip and fluid, the frictional resistance, the multiple strengthening heat transfer property that reduce in heat exchanger tube are preferable.
Description
Technical field
The utility model relates to technical field of heat exchange, and in particular to the plug-in type whirlpool of convective heat transfer generates in a kind of enhanced tube
Device turbulent element.
Background technique
In enhanced heat exchange technical field, it is most wide involved in industrial application for managing interior enhanced heat exchange technology.It has developed
The interposer enhanced heat transfer component of diversified forms, such as spiral winding, twisted strip are gone out.The maximum feature of insertion turbulent element in pipe
Be: structure is simple, is suitble to the improvement and design of old heat exchanger, and convenient processing and manufacture, facilitates dirt in cleaning pipe.
Secondary Flow enhanced heat exchange is relatively advanced at present and highly effective enhanced heat exchange technology.Secondary Flow refers to vertical master
Flowing on flow section, an order of magnitude smaller than mainstream speed, it can be in the case where not generating excessive mechanical energy dissipative substantially
Spend augmentation of heat transfer.Therefore, rationalization and induction generate Secondary Flow, by effective enhanced heat exchange.
Vortex generators are ideal secondary flow generator and controller, and the Secondary Flow of generation is in more wide reynolds number range
It being capable of effectively augmentation of heat transfer.Currently, the vortex generators generally punch forming on heat exchanger outer surface, but be difficult in pipe real
It applies, if arranging in pipe, vortex generators will make the heat-transfer capability of heat exchanger be highly improved.
Utility model content
In view of the above technical problems, the utility model provides a kind of plug-in type vortex generators of convective heat transfer in enhanced tube
Turbulent element, it can induce the Secondary Flow for generating larger intensity in heat exchanger tube, have that structure is simple, convenient processing and manufacture, subtracts
The small contact area of twisted strip and fluid reduces frictional resistance in heat exchanger tube, the advantages that multiple strengthening heat transfer property is preferable.
To achieve the above object, the technical solution that the utility model is taken are as follows:
The plug-in type vortex generators turbulent element of convective heat transfer in a kind of enhanced tube, vortex generators turbulent element have the period
Property structure, by being formed by screw twisted by the foil of set geometric figure removal some materials with a thickness of 0.5~2mm,
Torsion rate range is 2.0~10.0.
Preferably, shape of the vortex generators turbulent element before distortion determines that one range of angle is 25 °~90 °, shape
Shape determines that two range of angle is 65 °~155 °.
Preferably, spacing of the vortex generators turbulent element before distortion between adjacent vortex generators is in heat exchanger tube
1.0~4.0 times of diameter, the axial length that each vortex generators are contacted with tube wall are 0.5~2 times of heat exchange bore.
Preferably, for the vortex generators turbulent element before distortion, the substrate width of no vortex generators is in heat exchanger tube
0.3~0.6 times of diameter.
Preferably, the vortex generators turbulent element substrate width is 1.0~2.0mm smaller than heat exchange bore, length one
As it is isometric or slightly shorter with heat exchanger tube.
The plug-in type vortex generators turbulent element of the utility model can induce in heat exchanger tube generates the secondary of larger intensity
Stream, with structure simple, convenient processing and manufacture, the contact area for reducing twisted strip and fluid, reduce friction in heat exchanger tube
The advantages that resistance, preferable multiple strengthening heat transfer property.
Detailed description of the invention
Fig. 1 is the X-Y scheme of substrate when plug-in type vortex generators turbulent element does not reverse；
Fig. 2 is the 3 d effect graph of plug-in type vortex generators turbulent element；
Fig. 3 is the three-dimensional section view of interpolation plug-in type vortex generators turbulent element pipe；
Fig. 4 is the cross-sectional view of interpolation plug-in type vortex generators turbulent element pipe；
Fig. 5 is round tube inner wall face surface heat transfer ability and secondary intensity of flow after interpolation plug-in type vortex generators turbulent element
Corresponding relationship；
Fig. 6 is after interpolation plug-in type vortex generators turbulent element, the average local nusselt number of round tube wall surface transverse direction is along mainstream
The changing rule in direction；
Fig. 7 is after interpolation plug-in type vortex generators turbulent element, augmentation of heat transfer overall evaluation criterion JF is along mainstream side in pipe
To changing rule；
In figure, 1- blank pipe, 2- plug-in type vortex generators turbulent element, β-vortex generators shape decision angle one, is produced from γ-whirlpool
The shape of raw device determines angle two, substrate width when W- is without vortex generators, and the axial direction that each vortex generators of B- are contacted with tube wall is long
Degree, the spacing before S- torsion between adjacent vortex generators, H- twisted strip pitch, D- heat exchange bore, δ-vortex generators substrate are thick
Degree.
Specific embodiment
In order to which the purpose of this utility model and advantage is more clearly understood, with reference to embodiments to the utility model into
Row is further described.It should be appreciated that specific embodiment described herein is only used to explain the utility model, and do not have to
In restriction the utility model.
As Figure 1-Figure 4, is produced from the plug-in type whirlpool that the utility model embodiment provides convective heat transfer in a kind of enhanced tube
Raw device turbulent element, has periodic structure, by removing the thin gold of some materials by set geometric figure with a thickness of 0.5~2mm
Belong to piece to form by screw twisted；The relationship of torsion rate Tr and pitch H are as follows: Tr=H/D obtains different torsion rates by changing pitch H
Vortex generators, torsion rate range be 2.0~10.0.
Application examples
One section of heat exchanger tube comprising two pairs of vortex generators is chosen, the shape of vortex generators turbulent element determines angle one, angle two
Respectively β=52.5 °, γ=127.5 °, torsion rate Tr=5.0, S/D=1.25, B/D=0.38, δ/D=0.05, W/D=0.3,
Prandtl number Pr=0.93~13.67 of working medium, to interpolation vortex generators flow-disturbing member in the range of reynolds number Re is 50~600
Flowing has carried out numerical analysis in part pipe, and comparing result is as shown in Fig. 5,6,7.
After Fig. 5 show insertion interpolation type vortex generators turbulent element, round tube inner wall face surface passes ability and Secondary Flow is strong
The corresponding relationship of degree.
After Fig. 6 show insertion interpolation type vortex generators turbulent element, the average local nusselt number Nu of round tube wall surface transverse directions
Along the changing rule of main flow direction.By calculated result it is found that the average part Nu of round tube wall surface transverse directionsIncrease 0.7~3.9 times.
After Fig. 7 show insertion interpolation type vortex generators turbulent element, interior augmentation of heat transfer overall evaluation criterion JF is managedsAlong main
Flow the changing rule in direction.By calculated result it is found that JFsMaximum value is 2.92, and comprehensive performance is preferable.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "top", "bottom", "inner", "outside" be orientation based on the figure or
Positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the device or member of indication or suggestion meaning
Part must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
Claims (2)
1. the plug-in type vortex generators turbulent element of convective heat transfer in a kind of enhanced tube, which is characterized in that vortex generators flow-disturbing member
Part has periodic structure, by passing through spiral by the sheet metal of set geometric figure removal some materials with a thickness of 0.5~2mm
It reverses, torsion rate range is 2.0~10.0, and shape of the vortex generators turbulent element before distortion determines one range of angle
It is 25 °~90 °, shape determines that two range of angle is 65 °~155 °, and vortex generators turbulent element phase adjacent vortex before distortion produces
Spacing between raw device is 1.0~4.0 times of heat exchange bore, and the axial length that each vortex generators are contacted with tube wall is heat exchange
0.5~2.0 times of bore, for the vortex generators turbulent element before distortion, the substrate width of no vortex generators is heat exchange
0.3~0.6 times of bore.
2. the plug-in type vortex generators turbulent element of convective heat transfer, feature in a kind of enhanced tube according to claim 1
It is, the vortex generators turbulent element substrate width is 1.0~2.0mm smaller than heat exchange bore, and length is isometric with heat exchanger tube
Or it is shorter than heat exchanger tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821032392.XU CN209623471U (en) | 2018-06-25 | 2018-06-25 | The plug-in type vortex generators turbulent element of convective heat transfer in a kind of enhanced tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821032392.XU CN209623471U (en) | 2018-06-25 | 2018-06-25 | The plug-in type vortex generators turbulent element of convective heat transfer in a kind of enhanced tube |
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| Publication Number | Publication Date |
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| CN209623471U true CN209623471U (en) | 2019-11-12 |
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| CN201821032392.XU Expired - Fee Related CN209623471U (en) | 2018-06-25 | 2018-06-25 | The plug-in type vortex generators turbulent element of convective heat transfer in a kind of enhanced tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362394A (en) * | 2021-12-03 | 2022-04-15 | 中车永济电机有限公司 | Stator core capable of enhancing heat transfer |
-
2018
- 2018-06-25 CN CN201821032392.XU patent/CN209623471U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362394A (en) * | 2021-12-03 | 2022-04-15 | 中车永济电机有限公司 | Stator core capable of enhancing heat transfer |
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Addressee: Lanzhou Jiaotong University Person in charge of patents Document name: payment instructions |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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