CN104101244A - Streamline amplitude-variable corrugated fins for elliptical tube-fin heat exchanger - Google Patents
Streamline amplitude-variable corrugated fins for elliptical tube-fin heat exchanger Download PDFInfo
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- CN104101244A CN104101244A CN201410377479.0A CN201410377479A CN104101244A CN 104101244 A CN104101244 A CN 104101244A CN 201410377479 A CN201410377479 A CN 201410377479A CN 104101244 A CN104101244 A CN 104101244A
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- fin
- ripple
- streamline
- streamlined
- corrugation
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- 238000004080 punching Methods 0.000 claims abstract description 5
- 238000010992 reflux Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 13
- 238000009751 slip forming Methods 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 4
- 230000003749 cleanliness Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a streamline amplitude-variable corrugated fins for an elliptical tube-fin heat exchanger. Convex-concave streamline convex corrugation (4) and concave corrugation (5) are continuously formed on each fin (1) from the inlet to the outlet of airflow according to the streamline orientation through punching, and connection lines of the same troughs/crests are streamlines; the amplitude of corrugation changes at appropriate waveform in the streamline direction; the amplitude of different kinds of transverse corrugation envelopes corrugation crests by the appropriate waveform as a rule for change. The maximum amplitude of the convex corrugation (4) and the concave corrugation (5) is 0.1-0.9 times more than the spacing of the fins, and the cross section is in any suitable shape. The streamline does not generate backflow at a tail tube along the axial center section of the tube in the flat fin side channel of the tube-fin heat exchanger corresponding to the fin (1). The fluid flows among the streamline corrugated fins, part of the fluid flows in the streamline channel formed by the convex and concave corrugation, the amplitude of the corrugation changes along the streamline and transverse direction and thereby wall shear stress in flowing is reduced, and flowing pressure loss is significantly reduced.
Description
Technical field
The present invention relates to elliptical tube fin-tube type heat exchanger fin, particularly the streamlined change wave amplitude of a kind of elliptical tube fin-tube type heat exchanger corrugated fin.
Background technology
Fin-tube type heat exchanger application is very extensive.The thermal resistance of such heat exchanger mainly concentrates on fin side, thereby energy consumption also mainly consumes in fin side.Generally, in such Tube Sheet of Heat Exchanger, mobile working medium is liquid, and the gas of the outer fin side flow of pipe is air or other mist in most of number situations.For reducing the thermal resistance of gas side, in pipe outside, fin being installed can increase heat exchange area, reaches the object that reduces thermal resistance.
Elliptical tube fin-tube type heat exchanger is because its pipe geometry is compared with pipe and had certain cleanliness feature, but in the time that pipe sizing becomes large or flow velocity raising, its cleanliness variation, fluid skim over elliptical tube flow time lift-off cause that flowing pressure loss is larger, and form the recirculating zone that is unfavorable for heat transfer at elliptical tube afterbody, thereby flowing heat transfer performance needs further to be improved.The existing enhanced fin heat transfer technology cleanliness of fluid at pipe wing wing passage that do not have clear improvement.For further improving the heat transfer property of elliptical tube fin heat exchanger, the fin of seeking applicable elliptical tube fin-tube type heat exchanger is very necessary.
Summary of the invention
Thinking of the present invention is that the streamlined ripple guiding fluid by stamping out at elliptical tube fin-tube type heat exchanger fin surface flows by streamline, reach lift-off when improving fluid flow stream linearity, suppression fluid and streaming elliptical tube, reduce flow resistance, improve the object of fin exchange capability of heat.
For the technical solution used in the present invention that achieves the above object is to extrude convex-concave alternate streamlined protruding ripple 4 and streamlined recessed ripple 5 from air flow inlet to outlet continuous punching according to streamline trend on fin 1; Same trough, crest line are streamline, and ripple area border 8 is also streamline, and fin (plain film) median plane O-O is upper before punching press, determine as required with value of stream function.。
The wave amplitude of streamlined protruding ripple 4 and recessed ripple 5 longitudinally on demand waveform 9 change, in the high region of flow velocity (pipe peripheral region), wave amplitude is less, in the low region of flow velocity (region between front and rear row pipe), wave amplitude is larger.
Different streamlined protruding ripples 4 and the wave amplitude of recessed ripple 5 edge be waveform 10 envelope ripple paddy peaks variations on demand laterally, such as, larger at the ripple wave amplitude in the region away from pipe, less at the ripple wave amplitude near pipe near zone.
The 0.1-0.9 that the protruding ripple 4 of described streamlined fin 1, the minimum wave amplitude of recessed ripple 5 are spacing of fin doubly.
The protruding ripple 4 of described streamlined fin 1, the cross section of recessed ripple 5 can be to need arbitrarily bellows-shaped 6, such as fold-line-shaped, just/cosine waveform, parabola shaped, circular arc etc.
The streamline of described streamlined fin 1 is that 1 respective tube fin heat exchanger plain film fin wing passage of fin does not occur along pipe tail on the axial central cross-section of pipe the streamline refluxing.
The protruding ripple 4 of described streamlined fin, recessed ripple 5 spacing or number are determined as required according to the value of stream function on ripple area border 8.
Protruding ripple 4, the recessed ripple 5 stamping out on described streamlined fin 1 distributes alternately and is symmetrical about the longitudinal and transverse center line of pore 2 respectively.
On described streamlined fin 1, stamp out annulus boss 3, and stamp out a flange 7 at its top, be convenient to fin poling and a definite pitch of fins.
The height that stamps out annulus boss 3 on described streamlined fin 1 can change, and for regulating spacing of fin, welding rear boss contact with pipe tightly, plays to fix fin and reduce the effect of thermal resistance.
After streamlined fin and pipe assembling, in the time that fluid flows between multi-layer streamline fin, streamlined convex-concave ripple by fin surface continuously guides, fluid mainly flows along set streamline, in passage, flow steadily, the lift-off of elliptical tube afterbody fluid has obtained effective inhibition, simultaneously, streamlined ripple wave amplitude longitudinally and horizontal variation, has further reduced flow resistance.Fin surface convex-concave ripple has increased fin surface area simultaneously, has reduced heat transfer resistance, has improved the exchange capability of heat of fin.
Brief description of the drawings
Fig. 1 is the streamlined change wave amplitude of a kind of elliptical tube fin-tube type heat exchanger corrugated fin.
Label in Fig. 1: 1. fin; 2. oval pore on fin; 3. elliptical ring boss; 4. protruding ripple; 5. recessed ripple; 6. bellows-shaped; 7. flange; 8. border, corrugated regions; 9. wave amplitude longitudinally changes waveform; 10. wave amplitude is along cross directional variations envelope crest, trough waveform.
Detailed description of the invention
Referring to Fig. 1, the streamlined protruding ripple 4, recessed ripple 5 and the bellows-shaped 6 that the present invention includes oval pore 2 on fin 1, elliptical ring boss 3, stamp out.Oval pore 2 can adopt fork row or in-line arrangement mode.The height of elliptical ring boss 3 equals spacing of fin, plays the effect of fin location.Slightly there is a flange 7 at the top of elliptical ring boss 3 toward turning up, and is convenient to fin poling and location.Streamlined protruding ripple 4 (solid line) and recessed ripple 5 (dotted line) distribute alternately as required according to the value of stream function on ripple area border 8 between ripple area border 8, and symmetrical about the longitudinal and transverse center line in hole 2 respectively.Streamlined protruding ripple 4 all moves towards from air flow inlet to outlet continuous distributed along streamline with recessed ripple 5.Streamlined protruding ripple 4 changes according to 9 cycles of curve in a longitudinal direction with the wave amplitude of recessed ripple 5, in the high region of flow velocity (elliptical tube peripheral region), wave amplitude is lower, and in the low region of flow velocity (region between front and rear row elliptical tube), wave amplitude is larger.Different streamlined protruding ripples 4 and the wave amplitude of recessed ripple 5 are along laterally changing by the rule at suitable waveform 10 envelope ripple paddy peaks, larger at the ripple wave amplitude in the region away from pipe, less at the ripple wave amplitude near pipe near zone.The 0.1-0.9 that ripple wave amplitude maximum is spacing of fin doubly.Streamlined protruding ripple 4 can be any shape needing with the section bellows-shaped 6 of recessed ripple 5, such as, fold-line-shaped, just/cosine waveform, parabola shaped, circular arc etc.
The present invention, after fin 1 punch forming, is sleeved on fin 1 on elliptical tube through circular hole 2, and 1 of fin is located by elliptical ring boss 3, by just having completed the making of whole elliptical tube fin-tube type heat exchanger after a series of common process such as pressure testing in welding, pipe.
The operation principle of streamlined corrugated fin is: in the time flowing in the passage of fluid between streamlined corrugated fin, by the streamlined protruding ripple 4 of fin surface and the continuously guiding of recessed ripple 5, inner fluid passage mainly flows in the streamlined passage that protruding ripple 4 and recessed ripple 5 form, the wave amplitude of streamlined ripple longitudinally to and make to be flowing in wall shear stress mobile in streamlined passage along cross directional variations and decline, obviously reduced flow resistance.Meanwhile, protruding ripple 4 and recessed ripple 5 have increased fin surface and have amassed, reduced fin side heat transfer resistance, and fluid flow line type flows and make to be difficult for producing recirculating zone after elliptical tube, and the heat exchange property of elliptical tube rear portion fin is also improved significantly.More than invention makes streamlined corrugated fin have mobile and heat transfer property preferably.
Claims (7)
1. the streamlined change wave amplitude of elliptical tube fin-tube type heat exchanger corrugated fin, is characterized in that: above extrude convex-concave alternate streamlined protruding ripple (4) and streamlined recessed ripple (5) from air flow inlet to outlet continuous punching according to streamline trend at fin (1); Same trough, crest line are streamline; The wave amplitude of ripple is longitudinally changing by required waveform (9); Horizontal different ripple changes by required waveform (10) envelope ripple paddy peak.
2. streamlined fin according to claim 1 (1), is characterized in that ripple area border (8) is also streamline, and fin (plain film) median plane O-O is upper before punching press, determines as required with value of stream function.
3. streamlined fin according to claim 1 (1), the maximum amplitude that it is characterized in that protruding ripple (4), recessed ripple (5) is spacing of fin 0.1-0.9 times.
4. streamlined fin according to claim 1 (1), the cross section that it is characterized in that protruding ripple (4), recessed ripple (5) can be the random waveform (6) of needs.
5. streamlined fin according to claim 1 (1), its streamline is that fin (1) institute respective tube fin heat exchanger plain film fin wing passage does not occur along pipe tail on the axial central cross-section of pipe the streamline refluxing.
6. streamlined fin according to claim 1 (1), is characterized in that the spacing of protruding ripple (4), recessed ripple (5) or number are definite according to the value of stream function of ripple area border (8).
7. streamlined fin according to claim 1 (1), is characterized in that the protruding ripple (4) stamping out, recessed ripple (5) distribute alternately and symmetrical about the center line in length and breadth of hole (2) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410377479.0A CN104101244B (en) | 2014-08-01 | 2014-08-01 | The streamlined change wave amplitude corrugated fin of elliptical tube fin-tube type heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410377479.0A CN104101244B (en) | 2014-08-01 | 2014-08-01 | The streamlined change wave amplitude corrugated fin of elliptical tube fin-tube type heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104101244A true CN104101244A (en) | 2014-10-15 |
| CN104101244B CN104101244B (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410377479.0A Active CN104101244B (en) | 2014-08-01 | 2014-08-01 | The streamlined change wave amplitude corrugated fin of elliptical tube fin-tube type heat exchanger |
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| CN (1) | CN104101244B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956228A (en) * | 2018-07-15 | 2018-12-07 | 东北石油大学 | Along the rock core preparation method of journey shearing outside a kind of elimination |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10141880A (en) * | 1996-11-12 | 1998-05-29 | Matsushita Electric Ind Co Ltd | Heat exchanger with fin |
| CN1197922A (en) * | 1997-04-28 | 1998-11-04 | 株式会社日立制作所 | Heat excharger |
| CN1275708A (en) * | 1999-05-31 | 2000-12-06 | 三菱重工业株式会社 | Heat exchanger and making method thereof |
| JP3442713B2 (en) * | 2000-03-01 | 2003-09-02 | 株式会社日立製作所 | Heat exchanger |
| CN1573271A (en) * | 2003-05-28 | 2005-02-02 | Lg电子株式会社 | Heat exchanger |
| JP2008180468A (en) * | 2007-01-25 | 2008-08-07 | Univ Of Tokyo | Heat exchanger |
| CN201476667U (en) * | 2009-06-25 | 2010-05-19 | 跃腾科技股份有限公司 | Thermal pipe type radiation fin capable of enlarging radiation areas |
| CN202853449U (en) * | 2011-10-14 | 2013-04-03 | 松下电器产业株式会社 | Finned tube heat exchanger |
-
2014
- 2014-08-01 CN CN201410377479.0A patent/CN104101244B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10141880A (en) * | 1996-11-12 | 1998-05-29 | Matsushita Electric Ind Co Ltd | Heat exchanger with fin |
| CN1197922A (en) * | 1997-04-28 | 1998-11-04 | 株式会社日立制作所 | Heat excharger |
| CN1275708A (en) * | 1999-05-31 | 2000-12-06 | 三菱重工业株式会社 | Heat exchanger and making method thereof |
| JP3442713B2 (en) * | 2000-03-01 | 2003-09-02 | 株式会社日立製作所 | Heat exchanger |
| CN1573271A (en) * | 2003-05-28 | 2005-02-02 | Lg电子株式会社 | Heat exchanger |
| JP2008180468A (en) * | 2007-01-25 | 2008-08-07 | Univ Of Tokyo | Heat exchanger |
| CN201476667U (en) * | 2009-06-25 | 2010-05-19 | 跃腾科技股份有限公司 | Thermal pipe type radiation fin capable of enlarging radiation areas |
| CN202853449U (en) * | 2011-10-14 | 2013-04-03 | 松下电器产业株式会社 | Finned tube heat exchanger |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956228A (en) * | 2018-07-15 | 2018-12-07 | 东北石油大学 | Along the rock core preparation method of journey shearing outside a kind of elimination |
| CN108956228B (en) * | 2018-07-15 | 2021-02-05 | 东北石油大学 | Core preparation method for eliminating external on-way shear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104101244B (en) | 2016-06-08 |
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Effective date of registration: 20240528 Address after: 730070 No. 139, Zaolin Road, Anning District, Lanzhou City, Gansu Province (Lanzhou Jiaotong University Science Park) Patentee after: Lanzhou Jinnuo Green Energy Power Technology Co.,Ltd. Country or region after: China Address before: 730070 No. 88 Anning West Road, Anning District, Gansu, Lanzhou Patentee before: Lanzhou Jiaotong University Country or region before: China |
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