CN104110986B - Circular pipe pipe fin heat exchanger streamlined change wave amplitude circular arc corrugated fin - Google Patents
Circular pipe pipe fin heat exchanger streamlined change wave amplitude circular arc corrugated fin Download PDFInfo
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- CN104110986B CN104110986B CN201410373835.1A CN201410373835A CN104110986B CN 104110986 B CN104110986 B CN 104110986B CN 201410373835 A CN201410373835 A CN 201410373835A CN 104110986 B CN104110986 B CN 104110986B
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Abstract
A kind of circular pipe pipe fin heat exchanger streamlined change wave amplitude circular arc corrugated fin.Fin 1 stamps out the convex ripple of streamlined circular arc 4 and the recessed ripple 5 of circular arc according to set streamline.Its prescribed fluid streamline is the streamline not occurring backflow in fin-tube type heat exchanger fin wing passage corresponding to fin 1 along pipe tail on pipe axial center section.The crest line of the convex ripple of same circular arc 4 is set streamline; The trough line of the recessed ripple of same circular arc 5 is set streamline.The recessed ripple 5 of the convex ripple of circular arc 4, circular arc wave amplitude longitudinally changes with waveform 16, and wave amplitude transversely changes with waveform 17 envelope ripple paddy peak.When fluid flow through flow line type circular arc corrugated fin, the channel flow that segment fluid flow is formed along the convex ripple of streamlined circular arc 4 and the recessed ripple 5 of circular arc, reduces flow resistance, improves the exchange capability of heat of fin.
Description
Technical field
The present invention relates to circular pipe pipe-fin formula heat exchanger fin, particularly a kind of circular pipe pipe fin heat exchanger streamlined change wave amplitude circular arc corrugated fin.
Background technology
Circular pipe pipe fin heat exchanger is widely used in multiple industries such as chemical industry, air-conditioning, refrigeration.In use, general liquid working substance is at Bottomhole pressure, and gas is in pipe flows outside.And gas side thermal resistance accounts for the 70%-90% of this type of heat exchanger entire thermal resistance, be the dominant thermal resistance of heat exchange link, the thermal resistance reducing air side is very important to raising heat exchanger overall heat exchange performance.For improving the heat transfer property of fin-tube type heat exchanger further, the disturbance increasing fluid is a kind of effective measures improving air side heat transfer effect.Usually fin surface is made the planform being conducive to increasing flow disturbance, such as shutter, transverse wave, vortex generators, discontinuous aunular surface groove, the vertical thorn of rhombus etc.These fins can reach the object of enhanced fin surface heat transfer, but also result in the increase of flow resistance simultaneously.
Circular pipe pipe fin heat exchanger now uses the flowing cleanliness in the enhanced heat transfer fin passages such as venetian blind type, split, vortex generators formula poor, and these enhanced fins, while augmentation of heat transfer, cause the flowing local resistance of flowing larger.Therefore, circular pipe pipe-fin formula heat exchanger fin surface heat exchanging performance needs to be improved further.
Summary of the invention
Thinking of the present invention guides fluid to flow by set streamline by stamping out streamlined circular arc ripple on circular pipe pipe-fin formula heat exchanger fin surface, reaches and improve fluid flow stream linearly, reduce flowing pressure loss, improve the object of fin exchange capability of heat.
For the technical solution used in the present invention that achieves the above object extrudes convex-concave alternate streamlined circular arc convex ripple 4 and streamlined circular arc recessed ripple 5 from air flow inlet to outlet continuous punching according to set streamline trend on fin 1; The crest line of the convex ripple of same circular arc 4 is set streamline; The trough line of the recessed ripple of same circular arc 5 is set streamline, and ripple area border 8 is also set streamline, and before stamping on fin median plane O-O, can determine according to value of stream function.
The wave amplitude of the convex ripple of streamlined circular arc 4 and the recessed ripple 5 of circular arc is longitudinally changing with waveform 16, such as, region (pipe peripheral region) wave amplitude high at flow velocity is less, and region (front and rear row pipe between the region) wave amplitude low at flow velocity is larger.
The wave amplitude of the different convex ripples of streamlined circular arc 4 and the recessed ripple 5 of circular arc transversely presses the change of waveform 17 envelope ripple paddy peak, and such as, the ripple amplitude in the region away from pipe is comparatively large, less at the ripple amplitude near pipe near zone.
The convex ripple of circular arc 4 of described streamlined circular arc fin 1, the minimum wave amplitude of the recessed ripple of circular arc 5 are 0.1-0.9 times of spacing of fin.
The convex ripple of circular arc 4 of described streamlined circular arc fin 1, the cross section molded line of the recessed ripple 5 of circular arc are circular arc molded line.The defining method of its circular arc molded line is: first set streamline 9, set streamline 10, set streamline 11, set streamline 12, set streamline 13, set streamline 14, set streamline 15 is placed on before punching press on fin median plane O-O, and the intersection point of these set streamlines and cross section A-A is respectively a little 9 ', point 10 ', point 11 ', point 12 ', point 13 ', point 14 ' and point 15 ', then determine intersection point 10 ' and intersection point 11 ' respectively, intersection point 11 ' and intersection point 12 ', intersection point 12 ' and intersection point 13 ', the central point a of intersection point 13 ' and intersection point 14 ', central point b, central point c and central point d, moves down intersection point 10 ', intersection point 12 ' by wave amplitude size vertical central plane O-O, and 14 ' point, intersection point is clipped to a little 10 ", point 12 ", point 14 ", move up intersection point 11 ', point is clipped to a little 11 for 13 ' minute ", put 13 ", finally respectively by 3: 9 ', point 10 " and some a, some a, point 11 " and some b, some b, point 12 " and some c, some c, point 13 " and some d and some d, point 14 " and point 15 ' determines the circular arc curved dies of convex ripple and recessed ripple.
The set streamline of described streamlined circular arc fin 1 is the streamline not occurring backflow in fin-tube type heat exchanger fin wing passage corresponding to fin 1 along pipe tail on pipe axial center section.
The convex ripple of circular arc 4 of described streamlined circular arc fin 1, circular arc recessed ripple 5 spacing or number are determined according to the value of stream function on ripple area border 8.
The convex ripple of circular arc 4 that described streamlined circular arc fin 1 stamps out, the recessed ripple of circular arc 5 distribute alternately and longitudinal and transverse center line respectively about pipe Circular Tube With Hole 2 is symmetrical.
Described streamlined circular arc fin 1 stamps out annulus boss 3, and stamps out a flange 7 at its top, be convenient to fin poling and determine a pitch of fins.
The height described streamlined circular arc fin 1 stamping out annulus boss 3 can change, and for regulating spacing of fin, expand tube rear boss contacts with pipe tightly, plays the effect that fixing fin reduces thermal resistance.
After streamlined circular arc fin and pipe are assembled, when fluid flows between multi-layer streamline circular arc fin, continuously guided by the streamlined circular arc convex-concave ripple of fin surface, segment fluid flow flows along set streamline, reduces flowing pressure loss.Meanwhile, streamlined circular arc ripple amplitude transversely further reduces flowing pressure loss by the change of waveform 17 envelope ripple paddy peak according to curve waveform 16 mechanical periodicity and different circular arc ripple amplitude along the longitudinal.Fin surface circular arc convex-concave ripple adds fin surface area, reduces heat transfer resistance, improves the exchange capability of heat of fin.
Accompanying drawing explanation
Fig. 1 is a kind of circular pipe pipe fin heat exchanger streamlined change wave amplitude circular arc corrugated fin.
Fig. 2 is circular arc ripple molded line defining method schematic diagram.
Label in Fig. 1: 1. fin; 2. Circular Tube With Hole on fin; 3. annulus boss; 4. the convex ripple of circular arc; 5. the recessed ripple of circular arc; 6. bellows-shaped; 7. flange; 8. ripple area border; 9-13. set streamline; 16. wave amplitudes longitudinally change waveform; 17. wave amplitudes transversely change envelope crest, trough waveform.
Label in Fig. 2: 9-15 set streamlines; Point 9 '-15 ' is the intersection point being placed on set streamline 9-15 on O-O face and cross section A-A; Point 10 "-14 " moves up and down a little 10 ' corresponding points after-14 ' by wave amplitude size vertical central plane O-O.
Detailed description of the invention
See Fig. 1-2, the present invention includes the Circular Tube With Hole 2 on fin 1, annulus boss 3, the convex ripple of streamlined circular arc 4 stamped out, the recessed ripple 5 of circular arc and bellows-shaped 6.Circular Tube With Hole 2 can adopt fork row or in-line arrangement mode.The height of annulus boss 3 equals spacing of fin, plays the effect of fin location.There is a flange 7 at the top of annulus boss 3 toward turning up, and is convenient to fin poling and fin location.The convex ripple of streamlined circular arc 4 (solid line) and the recessed ripple 5 (dotted line) of circular arc distribute alternately between ripple area border 8 according to the value of stream function on ripple area border 8, and longitudinal and transverse center line respectively about hole 2 is symmetrical.The convex ripple of streamlined circular arc 4 and the recessed ripple of circular arc 5 move towards from air flow inlet to exporting continuous distributed along set streamline.The wave amplitude of the convex ripple of streamlined circular arc 4 and the recessed ripple 5 of circular arc is along the longitudinal according to curve waveform 16 mechanical periodicity, such as, the region (pipe peripheral region) high at flow velocity reduces wave amplitude, and the region (front and rear row pipe between region) low at flow velocity increases wave amplitude.The wave amplitude of the different convex ripples of streamlined circular arc 4 and the recessed ripple 5 of circular arc transversely presses the change of waveform 17 envelope ripple paddy peak, and such as, the ripple amplitude in the region away from pipe is comparatively large, less at the ripple amplitude near pipe near zone.Ripple maximum amplitude is 0.1-0.9 times of spacing of fin.According to first set streamline 9, set streamline 10, set streamline 11, set streamline 12, set streamline 13, set streamline 14, set streamline 15 is placed on before punching press on fin median plane O-O, and the intersection point of these set streamlines and cross section A-A is respectively a little 9 ', point 10 ', point 11 ', point 12 ', point 13 ', point 14 ' and point 15 ', then determine intersection point 10 ' and intersection point 11 ' respectively, intersection point 11 ' and intersection point 12 ', intersection point 12 ' and intersection point 13 ', the central point a of intersection point 13 ' and intersection point 14 ', central point b, central point c and central point d, moves down intersection point 10 ', intersection point 12 ' by wave amplitude size vertical central plane O-O, and 14 ' point, intersection point is clipped to a little 10 ", point 12 ", point 14 ", move up intersection point 11 ', point is clipped to a little 11 for 13 ' minute ", put 13 ", finally respectively by 3: 9 ', point 10 " and some a, some a, point 11 " and some b, some b, point 12 " and some c, some c, point 13 " and some d and some d, point 14 " and point 15 ' determines the circular arc curved dies of convex ripple and recessed ripple.
The present invention is after the punch forming of streamlined circular arc corrugated fin 1, fin 1 is sleeved on pipe through circular hole 2, located by annulus boss 3 between fin 1, by just completing the making of whole fin-tube type heat exchanger after a series of common process such as pressure testing in expand tube, pipe.
The operation principle of streamlined circular arc corrugated fin is: when flowing in the passage of fluid between streamlined circular arc corrugated fin, by the continuously guiding that the cross section of fin surface is the convex ripple of circular arc 4 and the recessed ripple 5 of circular arc, segment fluid flow flows in the passage that the convex ripple of streamlined circular arc 4 and the recessed ripple 5 of circular arc are formed, flowing steadily, assignment of traffic is comparatively even, effectively inhibit the lift-off of pipe afterbody fluid, substantially reduce flowing pressure loss.The wave amplitude of streamlined circular arc ripple longitudinally and the change of transverse direction, reduce even further the shearing stress being flowing in wall, flow resistance is reduced further.Meanwhile, the convex ripple of streamlined circular arc 4 and the recessed ripple 5 of circular arc add fin surface and amass, reduce fin side heat transfer resistance, and the flowing of fluid flow line type not easily produces recirculating zone after making pipe, and the heat exchange property of pipe rear portion fin is also improved significantly.More than invention makes streamlined circular arc corrugated fin have good Flow-induced vibration performance.
Claims (7)
1. a circular pipe pipe fin heat exchanger streamlined change wave amplitude circular arc corrugated fin, is characterized in that: on fin (1), extrude the alternate convex ripple of streamlined circular arc (4) of convex-concave and the recessed ripple of streamlined circular arc (5) according to set streamline trend from air flow inlet to outlet continuous punching, the defining method of its circular arc molded line is first set streamline one (9), set streamline two (10), set streamline three (11), set streamline four (12), set streamline five (13), set streamline six (14), set streamline seven (15) is placed on before punching press on fin median plane O-O, and the intersection point of these set streamlines and cross section A-A is respectively an I (9 '), point II (10 '), point III (11 '), point IV (12 '), point V (13 '), point VI (14 '), point VII (15 '), then determines intersection point II (10 ') and intersection point III (11 ') respectively, intersection point III (11 ') and intersection point IV (12 '), intersection point IV (12 ') and intersection point V (13 '), central point A (a) of intersection point V (13 ') and intersection point VI (14 '), central point B (b), central point C (c) and central point D (d), move down intersection point II (10 ') by wave amplitude size vertical central plane O-O, intersection point IV (12 '), intersection point VI (14 ') point is clipped to a little II (10 "), point IV (12 "), point VI (14 "), move up intersection point III (11 '), intersection point V (13 ') point is clipped to a little III (11 "), (13 "), finally respectively by 3 I (9 ') for point V, point II (10 ") and some A (a), some A (a), point III (11 ") and some B (b), some B (b), point IV (12 ") and some C (c), some C (c), point V (13 ") and some D (d) and put D (d), (14 ") and some VII (15 ') determine the circular arc curved dies of convex ripple and recessed ripple to point VI, the crest line of the convex ripple of same circular arc (4) is set streamline, the trough line of the recessed ripple of same circular arc (5) is set streamline, its set streamline is the streamline that refluxing does not appear along pipe tail on pipe axial center section in the corresponding fin-tube type heat exchanger fin wing passage of fin (1).
2. circular pipe pipe fin heat exchanger according to claim 1 streamlined change wave amplitude circular arc corrugated fin, ripple area border (8) are also set streamlines, and before stamping on fin median plane O-O, determine according to value of stream function.
3. circular pipe pipe fin heat exchanger according to claim 1 streamlined change wave amplitude circular arc corrugated fin, is characterized in that the wave amplitude of ripple is in longitudinal change; The convex ripple of circular arc (4), the recessed ripple of circular arc (5) wave amplitude longitudinally change with waveform (16).
4. circular pipe pipe fin heat exchanger according to claim 1 streamlined change wave amplitude circular arc corrugated fin, is characterized in that the amplitude change of transversely different ripple; The wave amplitude of the convex ripple of circular arc (4), the recessed ripple of circular arc (5) transversely changes with waveform (17) envelope ripple paddy peak.
5. circular pipe pipe fin heat exchanger according to claim 1 streamlined change wave amplitude circular arc corrugated fin, it is characterized in that the convex ripple of circular arc (4), the maximum amplitude of the recessed ripple of circular arc (5) is spacing of fin 0.1-0.9 times.
6. circular pipe pipe fin heat exchanger according to claim 1 streamlined change wave amplitude circular arc corrugated fin, is characterized in that the spacing of the convex ripple of circular arc (4), the recessed ripple of circular arc (5) or number are determined according to the value of stream function of ripple area border (8).
7. circular pipe pipe fin heat exchanger according to claim 1 streamlined change wave amplitude circular arc corrugated fin, the convex ripple of circular arc (4) that it is characterized in that stamping out, the recessed ripple of circular arc (5) distribute alternately and center line in length and breadth respectively about Circular Tube With Hole (2) is symmetrical.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410373835.1A CN104110986B (en) | 2014-08-01 | 2014-08-01 | Circular pipe pipe fin heat exchanger streamlined change wave amplitude circular arc corrugated fin |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410373835.1A CN104110986B (en) | 2014-08-01 | 2014-08-01 | Circular pipe pipe fin heat exchanger streamlined change wave amplitude circular arc corrugated fin |
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| CN104110986A CN104110986A (en) | 2014-10-22 |
| CN104110986B true CN104110986B (en) | 2016-01-06 |
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| CN201410373835.1A Active CN104110986B (en) | 2014-08-01 | 2014-08-01 | Circular pipe pipe fin heat exchanger streamlined change wave amplitude circular arc corrugated fin |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1124057A (en) * | 1994-03-03 | 1996-06-05 | Gea空冷设备公司 | Finned tube heat exchanger |
| KR100290761B1 (en) * | 1995-01-23 | 2001-06-01 | 구자홍 | Fin tube type heat exchanger |
| CN101013013A (en) * | 2007-02-01 | 2007-08-08 | 江苏萃隆铜业有限公司 | High finned heat-exchange tube and processing method thereof |
| CN201269712Y (en) * | 2008-09-08 | 2009-07-08 | 王晓武 | Multi-channel heat exchanger pipe |
| CN201344755Y (en) * | 2009-01-13 | 2009-11-11 | 胡琪 | High-fin heat exchange tube with longitudinal inner part and transverse outer part |
| CN101752356A (en) * | 2008-11-28 | 2010-06-23 | 富士电机系统株式会社 | Cooling apparatus for semiconductor chips |
| CN202002531U (en) * | 2010-12-31 | 2011-10-05 | 上海科米钢管有限公司 | Heat exchange device applying straight tube section special-shaped heat exchange tubes |
| CN103245247A (en) * | 2013-05-24 | 2013-08-14 | 南京北大工道软件技术有限公司 | Sweptback type corrugated fin |
-
2014
- 2014-08-01 CN CN201410373835.1A patent/CN104110986B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1124057A (en) * | 1994-03-03 | 1996-06-05 | Gea空冷设备公司 | Finned tube heat exchanger |
| KR100290761B1 (en) * | 1995-01-23 | 2001-06-01 | 구자홍 | Fin tube type heat exchanger |
| CN101013013A (en) * | 2007-02-01 | 2007-08-08 | 江苏萃隆铜业有限公司 | High finned heat-exchange tube and processing method thereof |
| CN201269712Y (en) * | 2008-09-08 | 2009-07-08 | 王晓武 | Multi-channel heat exchanger pipe |
| CN101752356A (en) * | 2008-11-28 | 2010-06-23 | 富士电机系统株式会社 | Cooling apparatus for semiconductor chips |
| CN201344755Y (en) * | 2009-01-13 | 2009-11-11 | 胡琪 | High-fin heat exchange tube with longitudinal inner part and transverse outer part |
| CN202002531U (en) * | 2010-12-31 | 2011-10-05 | 上海科米钢管有限公司 | Heat exchange device applying straight tube section special-shaped heat exchange tubes |
| CN103245247A (en) * | 2013-05-24 | 2013-08-14 | 南京北大工道软件技术有限公司 | Sweptback type corrugated fin |
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| CN104110986A (en) | 2014-10-22 |
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