CN104110986A - Streamline variable-amplitude arc-shaped wavy fin for round tube fin heat exchanger - Google Patents
Streamline variable-amplitude arc-shaped wavy fin for round tube fin heat exchanger Download PDFInfo
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- CN104110986A CN104110986A CN201410373835.1A CN201410373835A CN104110986A CN 104110986 A CN104110986 A CN 104110986A CN 201410373835 A CN201410373835 A CN 201410373835A CN 104110986 A CN104110986 A CN 104110986A
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- ripple
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Abstract
Disclosed is a streamline variable-amplitude arc-shaped wavy fin for round tube fin heat exchanger. According to needs of surfaces of extending fins and fluid flow guiding, streamline convex waves 4 and streamline concave waves 5 with integral cross sections in sine/cosine shapes are formed through extrusion on the fins from an air flow inlet to an outlet. Connection lines of the same wave troughs and wave crests are all streamlines. The streamlines are streamlines which enable backflow at tube ends to be avoided in a direction from the tube axis to central cross section in a side channel of a tube fin heat exchanger plate fin corresponding to the fins 1. The streamline convex waves 4 and the streamline concave waves 5 vary according to a needed waveform 16 along longitudinal wave amplitudes, and the wave amplitudes vary in a mode of a needed waveform 17 enveloping wave troughs and crests. The streamline arc-shaped wavy fin can effectively improve streamline of liquid flow, and reduces flow resistance; the convex/concave waves on the surface of the fin increase surface areas of the fin, therefore, the flow resistance is reduced and heat exchange capability of the fin is improved.
Description
Technical field
The present invention relates to circular pipe pipe-fin formula heat exchanger fin, particularly the streamlined change wave amplitude of a kind of circular pipe pipe fin heat exchanger circular arc corrugated fin.
Background technology
Circular pipe pipe fin heat exchanger is widely used in a plurality of industries such as chemical industry, air-conditioning, refrigeration.In use, general liquid working substance flows in pipe, 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 main thermal resistance of heat exchange link, the thermal resistance that reduces air side is very important to improving heat exchanger overall heat exchange performance.For further improving the heat transfer property of fin-tube type heat exchanger, the disturbance that increases fluid is a kind of effective measures of improving air side heat transfer effect.Conventionally fin surface is made to the planform that is conducive to increase flow disturbance, such as shutter, transverse wave, whirlpool generator, discontinuous aunular surface groove, the vertical thorn of rhombus etc.These fins can reach the object of enhanced fin surface heat transfer, but have also caused the increase of flow resistance simultaneously.
Circular pipe pipe fin heat exchanger now uses the mobile cleanliness in the enhanced heat transfer fin passages such as venetian blind type, split, whirlpool generator-type poor, and these enhanced fins, in augmentation of heat transfer, cause that mobile mobile local resistance is larger.Therefore, circular pipe pipe-fin formula heat exchanger fin surface heat exchanging performance needs further to be improved.
Summary of the invention
Thinking of the present invention is to flow by set streamline by stamp out streamlined ripple guiding fluid on circular pipe pipe-fin formula heat exchanger fin surface, reaches and improves fluid flow stream linearity, reduces flowing pressure loss, improves 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 circular arc protruding ripple 4 and streamlined circular arc 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, can determine as required according to value of stream function.
The wave amplitude of streamlined protruding ripple 4 and recessed ripple 5 is longitudinally changing with certain waveform 16, such as, in the high region of flow velocity (pipe peripheral region), wave amplitude is less, and 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 change along laterally pressing suitable waveform 17 envelope ripple paddy peaks, such as, larger at the ripple wave amplitude in the region away from pipe, less near the ripple wave amplitude of 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 transverse shape of recessed ripple 5 are circular arc.Definite method of its circular arc molded line is: first streamline 9-15 is placed on front fin (plain film) median plane O-O of punching press, the intersection point of these streamlines and cross section, A-A is respectively 9 '-15 ', then determine respectively intersection point 10 ' and 11 ', 11 ' and 12 ', 12 ' and 13 ', 13 ' and 14 ' central point a, b, c and d, by wave amplitude size vertical central plane O-O, move up and down 10 "-14 ", intersection point 10 '-14 ' minute be clipped to, finally respectively by 3: 9 ', 10 " and a, a, 11 " and b, b, 12 " and c, c, 13 " with d and d, 14 " and 15 ' determine the circular arc molded line equation of protruding ripple 4 and recessed ripple 5.
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 managing 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.
The protruding ripple 4 stamping out on described streamlined fin 1, recessed ripple 5 distribute alternately and are 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, expand tube rear boss contacts with pipe tightly, plays the effect that fixing fin reduces thermal resistance.
After the assembling of streamlined fin and pipe, when fluid flows between multi-layer streamline fin, the streamlined convex-concave ripple by fin surface continuously guides, and segment fluid flow flows along set streamline, has reduced flowing pressure loss.Meanwhile, streamlined ripple wave amplitude laterally changes and has further reduced flowing pressure loss by suitable waveform envelope ripple paddy peak according to the variation of suitable curve waveform cycle and different ripple wave amplitude edge along the longitudinal.Fin surface convex-concave ripple has increased fin surface area, has reduced heat transfer resistance, has improved the exchange capability of heat of fin.
Accompanying drawing explanation
Fig. 1 is the streamlined change wave amplitude of a kind of circular pipe pipe fin heat exchanger circular arc corrugated fin.
Fig. 2 is that circular arc ripple molded line is determined method schematic diagram.
Label in Fig. 1: 1. fin; 2. Circular Tube With Hole on fin; 3. annulus boss; 4. protruding ripple; 5. recessed ripple; 6. bellows-shaped; 7. flange; 8. ripple area border; 9-13. streamline; 14. wave amplitudes longitudinally change waveform; 15. wave amplitudes are along cross directional variations envelope crest, trough waveform.
Label in Fig. 2: 9-15 streamlines; 9 '-15 ' be to be placed on streamline 9-15 on O-O face and the intersection point of cross section, A-A; 10 "-14 " be by wave amplitude size vertical central plane O-O move up and down 10 '-14 ' after corresponding points.
The specific embodiment
Referring to Fig. 1-2, the streamlined protruding ripple 4, recessed ripple 5 and the bellows-shaped 6 that the present invention includes Circular Tube With Hole 2 on fin 1, annulus boss 3, stamp out.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.Slightly there is a flange 7 at the top of annulus boss 3 toward turning up, and is convenient to fin poling and fin 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 16 cycles of suitable curve waveform along the longitudinal with the wave amplitude of recessed ripple 5, such as, in the high region of flow velocity (pipe peripheral region), reduce wave amplitude, in the low region of flow velocity (region between front and rear row pipe), increase wave amplitude.Different streamlined protruding ripples 4 and the wave amplitude of recessed ripple 5 change along laterally pressing suitable waveform 17 envelope ripple paddy peaks, such as, larger at the ripple wave amplitude in the region away from pipe, less near the ripple wave amplitude of pipe near zone.Ripple maximum amplitude is 0.1-0.9 times of spacing of fin.According to first streamline 9-15 being placed on front fin (plain film) median plane O-O of punching press, the intersection point of these streamlines and cross section, A-A is respectively 9 '-15 ', then determine respectively intersection point 10 ' and 11 ', 11 ' and 12 ', 12 ' and 13 ', 13 ' and 14 ' central point a, b, c and d, by wave amplitude size vertical central plane O-O, move up and down 10 "-14 ", intersection point 10 '-14 ' minute be clipped to, finally respectively by 3: 9 ', 10 " and a, a, 11 " and b, b, 12 " and c, c, 13 " with d and d, 14 " and 15 ' determine the circular arc molded line equation of protruding ripple 4 and recessed ripple 5.
The present invention, after fin 1 punch forming, is sleeved on fin 1 on pipe through circular hole 2, and 1 of fin is located by annulus boss 3, by just having completed 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 corrugated fin is: while flowing in the passage of fluid between streamlined corrugated fin, the protruding ripple 4 that cross section by fin surface is circular arc and the continuously guiding of recessed ripple 5, segment fluid flow flows in the streamlined passage of protruding ripple 4 and 5 formation of recessed ripple, flow steadily, assignment of traffic is comparatively even, the lift-off that has effectively suppressed pipe afterbody fluid, has obviously reduced flowing pressure loss.The wave amplitude of streamlined ripple longitudinally and horizontal variation, has further reduced to be flowing in the shearing stress of wall, and flow resistance is further reduced.Meanwhile, the protruding ripple 4 of circular arc and recessed ripple 5 have increased fin surface and have amassed, reduced fin side heat transfer resistance, and fluid flow line type flows and to make to be difficult for producing recirculating zone after pipe, and the heat exchange property of pipe rear portion fin is also improved significantly.More than invention makes streamlined corrugated fin have mobile and heat transfer property preferably.
Claims (9)
1. the streamlined change wave amplitude of circular pipe pipe fin heat exchanger circular arc corrugated fin, is characterized in that: at fin (1), above according to streamline trend, from air flow inlet, to outlet continuous punching, extrude the alternate protruding ripple of streamlined circular arc (4) and the recessed ripple of streamlined circular arc (5) of convex-concave; Same trough, crest line are streamline; The wave amplitude of ripple is in longitudinal variation; Amplitude change along horizontal different ripples.
2. streamlined fin according to claim 1 (1), ripple area border (8) are also streamlines, and fin (plain film) median plane O-O is upper before punching press, can determine as required according to value of stream function.
3. streamlined fin according to claim 1 (1), is characterized in that protruding ripple (4), recessed ripple (5) wave amplitude longitudinally change with needs waveform (16).
4. streamlined fin according to claim 1 (1), is characterized in that the wave amplitude of protruding ripple (4), recessed ripple (5) is along laterally changing with needs waveform (17) envelope ripple paddy peak.
5. 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.
6. streamlined fin according to claim 1 (1), the transverse shape that it is characterized in that the protruding ripple of circular arc (4) and the recessed ripple of circular arc (5) is circular arc molded line, definite method of circular arc molded line is first streamline (9)-(15) to be placed on front fin (plain film) median plane O-O of punching press, the intersection point of these streamlines and cross section, A-A is respectively 9 '-15 ', then determine respectively intersection point 10 ' and 11 ', 11 ' and 12 ', 12 ' and 13 ', 13 ' and 14 ' central point a, b, c and d, by wave amplitude size vertical central plane O-O, move up and down 10 "-14 ", intersection point 10 '-14 ' minute be clipped to, finally respectively by 3: 9 ', 10 " and a, a, 11 " and b, b, 12 " and c, c, 13 " with d and d, 14 " and 15 ' determine the circular arc molded line equation of protruding ripple (4) and recessed ripple (5).
7. 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 managing tail on the axial central cross-section of pipe the streamline refluxing.
8. streamlined fin according to claim 1 (1), is characterized in that the spacing of protruding ripple (4), recessed ripple (5) or number are definite as required according to the value of stream function of ripple area border (8).
9. 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 |
|---|---|---|---|
| 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 |
|---|---|---|---|
| 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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| Publication Number | Publication Date |
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| CN104110986A true CN104110986A (en) | 2014-10-22 |
| CN104110986B 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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| CN104110986B (en) | 2016-01-06 |
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