CN107024137B - Wedge-shaped wave insert and the augmentation of heat transfer pipe for using it - Google Patents
Wedge-shaped wave insert and the augmentation of heat transfer pipe for using it Download PDFInfo
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- CN107024137B CN107024137B CN201710234710.4A CN201710234710A CN107024137B CN 107024137 B CN107024137 B CN 107024137B CN 201710234710 A CN201710234710 A CN 201710234710A CN 107024137 B CN107024137 B CN 107024137B
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- insert
- wedge
- heat transfer
- wave
- wave insert
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention belongs to heat transfer enhancement technology fields, and disclose the wedge-shaped wave insert for strengthening intraductal heat transfer, the wedge shape wave insert integrally shows periodically variable wave feature, the amplitude of one end is zero and along the direction from the end to the other end, the amplitude of the wedge shape wave insert is gradually increased, in addition, the end-view of the wedge shape wave insert is wedge shaped, i.e. in the shape that one end is small and the other end is big, and one end that amplitude is zero is small end.The specific form of fin when the present invention is swum from bionic structure angle by aquatic animals such as study cuttlefishes, the insert designed can preferably realize the excellent feature of heat exchange property, furthermore heat exchange tube hub high-velocity fluid region is smaller by the disturbance of insert, avoid the biggish loss of momentum, reduce flowing on-way resistance, to reach good comprehensive heat exchange property, equipment economy is improved.
Description
Technical field
The invention belongs to heat transfer enhancement technology fields, and in particular to strengthen the wedge-shaped wave insert of intraductal heat transfer and make
With its augmentation of heat transfer pipe.
Background technique
Under energy crisis background, industrial development requires energy-saving.It is that solution tradition is smooth using heat transfer enhancement technology to change
The important means of heat pipe inefficiency problem.It is a kind of the most practical for installing the heat transfer enhancement technology of insert in pipe at present
Heat conduction reinforced technology has the advantages that processing and manufacturing is simple, easy to loading and unloading, performance boost is significant, is especially suitable for old industrial body
The upgrading of old-fashioned heat exchanger in system, while need not additionally increase upgrade cost, save investment.
Insert has wave band, trapezoidal insert, spiral band, static mixer, porous media etc., insertion in conventional tube
Object carries out strong disturbance to fluid mass, so that the high temperature fluid of tube hub is constantly mixed with the cryogen of near-wall
Exchange, so that fluid temperature (F.T.) be made to tend to uniformly, achieve the purpose that thermoexcell heat exchange property.But insert is in enhanced heat exchange
While performance, on-way resistance is significantly increased, so that augmentation of heat transfer resultant performance enhancements are limited.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of wedge waves for strengthening intraductal heat exchange
Unrestrained formula insert and the augmentation of heat transfer pipe for using it, fin when being swum from bionic structure angle by aquatic animals such as study cuttlefishes
Specific form possessed by travelling it is quickly strong to water perturbation, the features such as flexible flow resistance of moving about is small, this designed is new
Type insert can preferably retain the excellent feature of traditional wave insert heat exchange property, while significantly reduce flow resistance, reach
To good comprehensive heat exchange property, equipment economy is improved.
To achieve the above object, according to one aspect of the present invention, the wedge-shaped wave for providing reinforcing intraductal heat transfer is inserted
Enter object, which is characterized in that the wedge shape wave insert integrally shows periodically variable wave feature, the vibration of one end
Width is zero and along the direction from the end to the other end, and the amplitude of the wedge shape wave insert is gradually increased, in addition, institute
The end-view for stating wedge-shaped wave insert is wedge shaped, i.e., in the shape that one end is small and the other end is big, and amplitude is the one of zero
End is small end.
Other side according to the invention additionally provides augmentation of heat transfer pipe, which is characterized in that including heat exchanger tube and described
Wedge-shaped wave insert, and the wedge-shaped wave insert is located in the heat exchanger tube.
Preferably, the small end of the wedge-shaped wave insert is set to the centerline of heat exchanger tube.
Preferably, the relationship of the internal diameter D of the wide B and heat exchanger tube of the wedge-shaped wave insert are as follows: B/D=1/4~1/
2。
Preferably, the relationship of the internal diameter D of the width T and heat exchanger tube of the signal period of the wedge-shaped wave insert are as follows:
T/D=1~3.
Preferably, the peak swing A of wedge-shaped wave insertmaxWith the relationship of heat exchange bore D are as follows: Amax/ D=1/10
~2/5.
Preferably, wedge-shaped wave insert more than two panels is arranged circumferentially in the heat exchanger tube, and each described
The small end of wedge-shaped wave insert is placed in the centerline of heat exchanger tube.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
1) after wedge-shaped wave insert is installed in heat exchanger tube, along the radial direction of heat exchanger tube from heat exchange tube hub,
Insert amplitude becomes larger, and heat exchange tube hub high-velocity fluid region is smaller by the disturbance of insert, avoids biggish dynamic
Amount loss, reduces flowing on-way resistance.
2) after wedge-shaped wave insert is installed in heat exchanger tube, from heat exchange tube hub radially, insert vibration
Width becomes larger, and enhances the disturbance to wall surface cryogen, destroys the development of thermal boundary layer, enhances heat convection
Energy.
3) after wedge-shaped wave insert is installed in heat exchanger tube, from heat exchange tube hub radially, insert vibration
Width becomes larger, and has good adaptivity to the heat exchanger tube of different tube diameters model, comprehensive heat exchange property is excellent and stablizes.
4) wedge-shaped wave insert structure is simple, and easily fabricated, mounting means is versatile and flexible, can be according to heat exchange property work
Skill requirement, adjustment insert install the piece number, have good wide applicability.
Detailed description of the invention
Fig. 1, Fig. 2 are structural schematic diagram of the wedge-shaped wave insert under different perspectives in the present invention；
Fig. 3 is the end-view of wedge-shaped wave insert in the present invention；
Fig. 4 is that two panels wedge shape wave insert same-phase is mounted on the schematic diagram in heat exchanger tube in the present invention；
Fig. 5 is that two panels wedge shape wave insert different phase is mounted on the schematic diagram in heat exchanger tube in the present invention；
Fig. 6 is that four wedge-shaped wave inserts intersect the schematic diagram being installed circumferentially in heat exchanger tube in the present invention；
Fig. 7 is that three kinds of mounting means change with light pipe and traditional wave band Nu-number Nu with reynolds number Re in the present invention
Figure；
Fig. 8 be in the present invention three kinds of mounting means and light pipe and traditional wave band resistance coefficient f with reynolds number Re variation diagram；
Fig. 9 is that three kinds of mounting means and traditional wave band integrate heat exchange property PEC with reynolds number Re variation diagram in the present invention；
In figure: 1- wedge shape wave insert, 2- heat exchanger tube, 11- small end, 12- big end.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
Referring to Fig.1~Fig. 9,1 entirety of wedge-shaped wave insert for strengthening intraductal heat transfer show periodically variable wave
Shape wave state, the amplitude of one end are zero and along the direction from the end to the other end, the vibrations of the wedge shape wave insert 1
Width is gradually increased, in addition, the end-view of the wedge shape wave insert 1 is wedge shaped, i.e., from one end toward the other end in terms of, be in one
Small and big other end shape is held, and one end that amplitude is zero is small end 11.
Other side according to the invention additionally provides augmentation of heat transfer pipe, including heat exchanger tube 2 and the wedge-shaped wave
Formula insert 1, and the wedge-shaped wave insert 1 is located in the heat exchanger tube 2.
Further, the small end 11 of the wedge-shaped wave insert 1 is set to the centerline of heat exchanger tube 2.
Further, the relationship of the internal diameter D of the wide B and heat exchanger tube 2 of the wedge-shaped wave insert 1 are as follows: B/D=1/4~
1/2。
Further, the relationship of the internal diameter D of the width T and heat exchanger tube 2 of the signal period of the wedge-shaped wave insert 1
Are as follows: T/D=1~3.
Further, the peak swing A of wedge-shaped wave insert 1maxWith the relationship of 2 internal diameter D of heat exchanger tube are as follows: Amax/ D=1/
10~2/5.
Further, insert more than two panels is arranged circumferentially in the heat exchanger tube 2, and each wedge-shaped wave
The small end 11 of insert 1 is placed in the centerline of heat exchanger tube 2.
As shown in Fig. 4~Fig. 6, currently preferred mounting means has been illustrated, insert amplitude small end 11, which is placed in, to be changed
At 2 tube hub of heat pipe, two panels insert can be according to equal center angle, same-phase or different phase arrangement, and multi-disc insert can
With according to equal center angle, arranged crosswise is used in combination.
Further, wedge-shaped wave insert 1 can rely on card slot, spot welding, bonding, the manufactures processing side such as integrated molding
Method is fixedly mounted according to preferred arrangement.
Further, the big end 12 of wedge-shaped wave insert 1 can suitably polish wave high spot, be changed with more preferable fitting
2 wall of heat pipe, is easily installed；Or there are gaps for big end 12 and 2 wall of heat exchanger tube, enhance washing away for fluid exchange 2 wall of heat pipe, reinforce
Heat transfer effect.
Embodiment:
In pipe range 500mm, the heat exchanger tube 2 of pipe interior diameter 20mm, it is 40mm with single wave period length, is highly
9mm, peak swing is the wedge-shaped wave insert 1 of 4.8mm, respectively according to two panels same-phase mode, two panels different phase mode,
Multi-disc interleaved mode is arranged, and carries out emulation survey to the comprehensive heat exchange property of insert using large scale business CFD software Fluent
Examination, and the augmentation of heat transfer pipe with light pipe and built-in same-amplitude size tradition wave band have carried out performance comparison, as a result as Fig. 7,
Shown in Fig. 8, Fig. 9.
Fig. 7 reflection is Nu-number Nu with reynolds number Re variation diagram.Fig. 7 shows three kinds of mounting means of the invention each
Good enhanced heat transfer effect is obtained under kind operating condition, is compared compared with light pipe, Nu improves 4 to 10 times.Wherein two panels of the present invention is different
For phase arrangement than same-phase arrangement, enhanced heat transfer effect is more preferable, and heat exchange can also be enhanced by increasing insert the piece number in managing
Effect.With compared with traditional wave band of amplitude size, two panels of the present invention is subtracted with different phase arrangement heat transfer effect
It is small, but be also able to maintain 80% or more of its enhanced heat exchange performance, multi-disc arranged crosswise mode of the present invention, heat transfer effect is then more excellent
In traditional wave band.
Fig. 8 reflection is resistance coefficient f with reynolds number Re variation diagram.Fig. 8 shows that the various arrangements of the present invention can increase
Add resistance coefficient, wherein two panels different phase arrangement of the present invention is than same-phase arrangement, resistance coefficient is smaller, increases in pipe
Insert the piece number then will increase resistance coefficient.But compared with traditional wave band, two panels of the present invention is the same as different phase arrangement institute
Increased resistance coefficient, maximum be no more than its 30%, caused by drag losses be remarkably decreased, and present invention heat exchange more preferably multi-disc
Arranged crosswise mode, the increased resistance coefficient of institute again smaller than traditional wave band, be at most its 67%, caused by drag losses it is also bright
It is aobvious to reduce.
Fig. 9 reflection is comprehensive heat exchange property PEC with reynolds number Re variation diagram.Fig. 9 shows three kinds of mounting means of the invention
Synthesis heat exchange property under various operating conditions has good behaviour, improves 2 to 3 times compared with light pipe.Wherein two panels out-phase of the present invention
For position arrangement than same-phase arrangement, comprehensive heat exchange property is more preferable, and insert the piece number can also enhance synthesis and change in increase pipe
Hot property.And the synthesis heat exchange property of three kinds of mounting means of the invention is superior to traditional wave band, wherein maximum performance promotes width
Degree has reached 56%, illustrates that the present invention can possess the excellent feature of traditional wave insert heat exchange property, significantly reduces simultaneously
Flow resistance reaches more excellent synthesis heat exchange property.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (5)
1. augmentation of heat transfer pipe, which is characterized in that including heat exchanger tube and wedge-shaped wave insert, the wedge shape wave insert
Entirety shows periodically variable wave feature, and the amplitude of one end is zero and along the direction from the end to the other end,
The amplitude of the wedge shape wave insert is gradually increased, in addition, the end-view of the wedge shape wave insert is wedge shaped, i.e.,
Small and big the other end shape in one end, and one end that amplitude is zero is small end, and the wedge-shaped wave is inserted into level
In in the heat exchanger tube, the small end of the wedge shape wave insert is set to the centerline of heat exchanger tube.
2. augmentation of heat transfer pipe according to claim 1, which is characterized in that the wide B of the wedge shape wave insert with change
The relationship of the internal diameter D of heat pipe are as follows: B/D=1/4~1/2.
3. augmentation of heat transfer pipe according to claim 1, which is characterized in that the signal period of the wedge shape wave insert
Width T and heat exchanger tube internal diameter D relationship are as follows: T/D=1~3.
4. augmentation of heat transfer pipe according to claim 1, which is characterized in that the peak swing A of wedge-shaped wave insertmax
With the relationship of heat exchange bore D are as follows: Amax/ D=1/10~2/5.
5. augmentation of heat transfer pipe according to claim 1, which is characterized in that wedge-shaped wave insert more than two panels is circumferential
It is arranged in the heat exchanger tube, and the small end of each wedge-shaped wave insert is placed in the centerline of heat exchanger tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710234710.4A CN107024137B (en) | 2017-04-12 | 2017-04-12 | Wedge-shaped wave insert and the augmentation of heat transfer pipe for using it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710234710.4A CN107024137B (en) | 2017-04-12 | 2017-04-12 | Wedge-shaped wave insert and the augmentation of heat transfer pipe for using it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107024137A CN107024137A (en) | 2017-08-08 |
| CN107024137B true CN107024137B (en) | 2019-03-05 |
Family
ID=59527437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710234710.4A Active CN107024137B (en) | 2017-04-12 | 2017-04-12 | Wedge-shaped wave insert and the augmentation of heat transfer pipe for using it |
Country Status (1)
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| CN (1) | CN107024137B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB661431A (en) * | 1949-07-01 | 1951-11-21 | Andre Huet | Improvements in or relating to apparatus for the exchange of heat between fluids |
| EP0275813B1 (en) * | 1986-12-29 | 1991-02-27 | United Technologies Corporation | Heat transfer enhancing device |
| CN1151016A (en) * | 1995-11-20 | 1997-06-04 | 张剑 | Fluid intensified heat transfer spoiler in heat-exchange tube |
| CN201653223U (en) * | 2010-05-14 | 2010-11-24 | 杭州美宝炉窑工程有限公司 | Insert heat exchange tubes with adjustable heat transfer performance and pressure drop |
| CN202002543U (en) * | 2011-01-25 | 2011-10-05 | 南通江华热动力机械有限公司 | Turbulence strip |
-
2017
- 2017-04-12 CN CN201710234710.4A patent/CN107024137B/en active Active
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| Publication number | Publication date |
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| CN107024137A (en) | 2017-08-08 |
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