CN104110991B - Elliptical tube fin-tube type heat exchanger streamlined wait wave amplitude just/cosine-shaped corrugated fin - Google Patents
Elliptical tube fin-tube type heat exchanger streamlined wait wave amplitude just/cosine-shaped corrugated fin Download PDFInfo
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- CN104110991B CN104110991B CN201410375539.5A CN201410375539A CN104110991B CN 104110991 B CN104110991 B CN 104110991B CN 201410375539 A CN201410375539 A CN 201410375539A CN 104110991 B CN104110991 B CN 104110991B
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Abstract
A kind of elliptical tube fin-tube type heat exchanger is streamlined wait wave amplitude just/cosine-shaped corrugated fin, it is the convex ripple of just/cosine-shaped 4 and the recessed ripple 5 of just/cosine-shaped that fin 1 stamps out shape of cross section according to set streamline; The crest line of the convex ripple of just same/cosine-shaped 4 is set streamline, and the trough line of the recessed ripple of just same/cosine-shaped 5 is set streamline; Its set 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 ripply wave amplitude of institute is identical, and is 0.1-0.9 times of spacing of fin.The number of the recessed ripple 5 of the convex ripple of just/cosine-shaped 4, just/cosine-shaped is determined according to value of stream function.Elliptical tube arrangement can be in-line arrangement also can be fork row.The convex ripple of just/cosine-shaped 4, the in length and breadth center line of the recessed ripple of just/cosine-shaped 5 respectively about oval pore 2 are symmetrical.When fluid flow through flow line type corrugated fin, the streamline flow passages flowing that segment fluid flow is formed along the convex ripple of just/cosine-shaped 4 and the recessed ripple 5 of just/cosine-shaped, reduces flow resistance, improves the exchange capability of heat of fin.
Description
Technical field
The present invention relates to a kind of elliptical tube fin-tube type heat exchanger fin, particularly a kind of elliptical tube fin-tube type heat exchanger streamlined wait wave amplitude just/cosine-shaped corrugated fin.
Background technology
Fin-tube type 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.Therefore, the enhanced heat exchange fin of various shape in recent years, such as shutter, transverse wave, crack, vortex generators, discontinuous aunular surface groove, rhombus found thorn etc., and the application in fin-tube type heat exchanger is more and more extensive.
Elliptical tube fin-tube type heat exchanger has certain cleanliness feature because its pipe geometry is compared with pipe, but when pipe sizing becomes large or flow velocity improves, its cleanliness is deteriorated, the fluid lift-off skimmed over when elliptical tube flows causes fluid resistance loss comparatively large, and forms the recirculating zone being unfavorable for conducting heat at elliptical tube afterbody.Elliptical tube fin-tube type heat exchanger now uses augmentation of heat transfer type fin while enhanced fin surface heat transfer, the flow disturbance that fin surface thrust causes can cause larger local pressure loss, the streamline performance that the fluid that do not improve significantly flows at fin wing passage, when making fluid flow through fin wing passage, the pressure loss is larger.
Summary of the invention
Thinking of the present invention guides fluid to flow by streamline by streamlined wavy channel, reaches suppression fluid lift-off, reduces flowing pressure loss, expand the object that fin surface amasss, improves fin flowing and heat exchange combination property simultaneously.
For realizing above object, the technical scheme that the present invention proposes be a kind of elliptical tube fin-tube type heat exchanger of design streamlined wait wave amplitude just/cosine-shaped corrugated fin, namely on described fin according to set streamline trend to extrude from air flow inlet to outlet continuous punching convex-concave alternate just streamlined/the convex ripple of cosine-shaped 4 and the recessed ripple 5 of just streamlined/cosine-shaped.
On described streamlined fin 1 same just/the crest line of the convex ripple of cosine-shaped (4) is set streamline; Same just/the trough line of the recessed ripple of cosine-shaped (5) is set streamline, ripple area border 8 is also set streamline, and before stamping on fin median plane O-O, determines with value of stream function.
The wave amplitude of just all on described streamlined fin 1/cosine-shaped convex-concave ripple is identical, is 0.1-0.9 times of spacing of fin.
Described streamlined fin 1 just/the convex ripple of cosine-shaped 4, the recessed ripple 5 of just/cosine-shaped transverse shape be just/cosine molded line.The determination method of its just/cosine molded line is: first set streamline 9, set streamline 10, set streamline 11, set streamline 12, set streamline 13, set streamline 14 and set streamline 15 to be placed on before punching press on fin median plane O-O, the intersection point of these set streamlines and cross section C-C is respectively intersection point 9 ', intersection point 10 ', intersection point 11 ', intersection point 12 ', intersection point 13 ', intersection point 14 ' and intersection point 15 ', to move up intersection point 10 ' by wave amplitude size vertical central plane O-O, intersection point 12, 14 ' point, intersection point is clipped to a little 10 ", point 12 ", point 14 ", move down intersection point 11 ', 13 ' point, intersection point is clipped to a little 11 ", point 13 ", finally by point 9 ' and point 10 " determining a little 9 ' to arrive point 10 with just/cosine function by the pi/2 cycle " section curved dies, respectively by point 10 " and putting 11 ", point 11 " and point 12 ", point 12 " and point 13 ", point 13 " and point 14 ", to determine the curved dies of each section with just/cosine function by the π cycle, " and point 15 ' determines a little 14 by the pi/2 cycle with just/cosine function " is to the curved dies putting 15 ' section by putting 14.
The set streamline of described streamlined 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.
Described streamlined fin just/the convex ripple of cosine-shaped 4, the spacing of the recessed ripple 5 of just/cosine-shaped or number determine according to the functional value on ripple area border 8.
The arrangement mode of elliptical tube can be in-line arrangement also can be fork row.
Described streamlined fin 1 stamps out just/the convex ripple of cosine-shaped 4, the recessed ripple of just/cosine-shaped 5 distribute alternately and longitudinal and transverse center line respectively about oval pore 2 is symmetrical.
Described streamlined fin 1 stamps out elliptical ring 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 fin 1 stamping out elliptical ring boss 3 can change, and for regulating spacing of fin, welding rear boss contacts with elliptical tube tightly, plays the effect that fixing fin reduces thermal resistance.
After streamlined fin and pipe are assembled, when fluid just streamlined/cosine-shaped fin spatial flow time, by fin surface just streamlined/cosine-shaped convex-concave ripple continuously guides, fluid mainly flows along set streamline, sectional flow speed is more even, the lift-off of elliptical tube afterbody fluid obtains effective suppression, improves the heat exchange of elliptical tube afterbody, reduces flow resistance.Meanwhile, fin surface just/cosine-shaped convex-concave ripple adds fin surface area, reduces heat transfer resistance, improves the exchange capability of heat of fin.
Accompanying drawing explanation
Fig. 1 be a kind of elliptical tube fin-tube type heat exchanger streamlined wait wave amplitude just/cosine-shaped corrugated fin.
Fig. 2 is just/cosine-shaped ripple molded line defining method schematic diagram.
Label in Fig. 1: 1. fin; 2. oval pore on fin; 3. elliptical ring boss; 4. the convex ripple of just streamlined/cosine-shaped; 5. the recessed ripple of just streamlined/cosine-shaped; 6. just/cosine-shaped bellows-shaped; 7. flange; 8. ripple area border.
Label in Fig. 2: 9-15 preset streamline; Point 9 '-15 ' is the intersection point being placed on default streamline 9-15 on O-O median plane and cross section C-C respectively; 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 oval pore 2 on fin 1, elliptical ring boss 3, stamp out just/the convex ripple of cosine-shaped 4, the recessed ripple 5 of just/cosine-shaped.The height of elliptical ring boss 3 equals spacing of fin, and there is a fillet 7 at the top of elliptical ring boss 3 toward turning up, and is convenient to fin poling and location.The convex ripple of just streamlined/cosine-shaped 4 (solid line) and the recessed ripple 5 (dotted line) of just/cosine-shaped distribute alternately between ripple area border 8 according to the functional value on ripple area border 8, and longitudinal and transverse center line respectively about oval pore 2 is symmetrical.The convex ripple of just streamlined/cosine-shaped 4 and the recessed ripple of just/cosine-shaped 5 move towards from air flow inlet to exporting continuous distributed along set streamline.The convex ripple of just streamlined/cosine-shaped 4 is constant with the wave amplitude of the recessed ripple of just/cosine-shaped 5, and wave amplitude is 0.1-0.9 times of spacing of fin.Oval pore 2 can adopt fork row or in-line arrangement mode.The convex ripple of just streamlined/cosine-shaped 4 is just/cosine function with the transverse shape of the recessed ripple 5 of just/cosine-shaped.According to first set streamline 9, set streamline 10, set streamline 11, set streamline 12, set streamline 13, set streamline 14 and set streamline 15 to be placed on before punching press on fin median plane O-O, the intersection point of these set streamlines and cross section C-C is respectively intersection point 9 ', intersection point 10 ', intersection point 11 ', intersection point 12 ', intersection point 13 ', intersection point 14 ' and intersection point 15 ', to move up intersection point 10 ' by wave amplitude size vertical central plane O-O, intersection point 12, 14 ' point, intersection point is clipped to a little 10 ", point 12 ", point 14 ", move down intersection point 11 ', 13 ' point, intersection point is clipped to a little 11 ", point 13 ", finally by point 9 ' and point 10 " determining a little 9 ' to arrive point 10 with just/cosine function by the pi/2 cycle " section curved dies, respectively by point 10 " and putting 11 ", point 11 " and point 12 ", point 12 " and point 13 ", point 13 " and point 14 ", to determine the curved dies of each section with just/cosine function by the π cycle, " and point 15 ' determines a little 14 by the pi/2 cycle with just/cosine function " is to the curved dies putting 15 ' section by putting 14.
Fin 1, after fin 1 punch forming, is sleeved on elliptical tube through elliptical aperture 2 by the present invention, is located between fin 1 by elliptical ring boss 3, by just completing the making of whole fin-tube type heat exchanger after a series of common process such as pressure testing in welding, pipe.
The operation principle of just streamlined/cosine-shaped corrugated fin is: when fluid flow through flow line type just/cosine-shaped corrugated fin composition passage time, by streamlined corrugated fin surface just/the continuously guiding of the convex ripple of cosine-shaped 4 and the recessed ripple 5 of just/cosine-shaped, segment fluid flow flows along set streamline, even pace is even in fluid flowing, effectively can suppress the lift-off of elliptical tube afterbody fluid.Meanwhile, the convex ripple of just/cosine-shaped 4 and the recessed ripple 5 of just/cosine-shaped add fin surface and amass, and reduce heat transfer resistance.Just streamlined/cosine wave corrugated fin effectively can improve elliptical tube and the heat exchange property between fin and fluid and obviously can reduce flowing pressure loss.
Claims (5)
1. elliptical tube fin-tube type heat exchanger streamlined wait wave amplitude just/a cosine-shaped corrugated fin, it is characterized in that: on fin (1) along the set streamline of fluid move towards continuous punching extrusion complete just/the convex ripple of cosine-shaped (4) and the recessed ripple of just/cosine-shaped (5), the defining method of its just/cosine-shaped 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 C-C is respectively an I (9 '), point II (10 '), point III (11 '), point IV (12 '), point V (13 '), point VI (14 '), point VII (15 '), to move up 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 "), (14 "), move down intersection point III (11 ') to point VI, intersection point V (13 ') point is clipped to a little III (11 "), (13 "), finally by 2 I (9 ') for point V, II (10 ") determine the curved dies of an I (9 ') to point II (10 ") section by the pi/2 cycle with just/cosine function, respectively by two II (10 ") and point III (11 "), point III (11 ") and put IV (12 "), point IV (12 ") and put V (13 "), point V (13 ") and put VI (14 "), to determine the curved dies of each section by the π cycle with just/cosine function, determine that a little VI (14 ") to the curved dies of putting VII (15 ') section by the pi/2 cycle with just/cosine function by two VI (14 ") and some VII (15 '), same just/the crest line of the convex ripple of cosine-shaped (4) is set streamline, same just/the trough line of the recessed ripple of cosine-shaped (5) is set streamline, its set streamline is the streamline not occurring backflow in the corresponding fin-tube type heat exchanger fin wing passage of fin (1) along pipe tail on pipe axial center section, the ripply wave amplitude of institute is identical.
2. elliptical tube fin-tube type heat exchanger according to claim 1 streamlined wait wave amplitude just/cosine-shaped corrugated fin, ripple area border (8) are also set streamlines, and before stamping on fin median plane O-O, determine with value of stream function.
3. elliptical tube fin-tube type heat exchanger according to claim 1 streamlined wait wave amplitude just/cosine-shaped corrugated fin, just it is characterized in that/convex the ripple of cosine-shaped (4), the wave amplitude of the recessed ripple of just/cosine-shaped (5) is spacing of fin 0.1-0.9 times.
4. elliptical tube fin-tube type heat exchanger according to claim 1 streamlined wait wave amplitude just/cosine-shaped corrugated fin, just it is characterized in that the spacing of/convex ripple of cosine-shaped (4), the recessed ripple of just/cosine-shaped (5) or number are determined according to the value of stream function of ripple area border (8).
5. elliptical tube fin-tube type heat exchanger according to claim 1 streamlined wait wave amplitude just/cosine-shaped corrugated fin, it is characterized in that stamping out just/the convex ripple of cosine-shaped (4), the recessed ripple of just/cosine-shaped (5) distribute alternately and longitudinal and transverse center line respectively about oval pore (2) is symmetrical.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410375539.5A CN104110991B (en) | 2014-08-01 | 2014-08-01 | Elliptical tube fin-tube type heat exchanger streamlined wait wave amplitude just/cosine-shaped corrugated fin |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410375539.5A CN104110991B (en) | 2014-08-01 | 2014-08-01 | Elliptical tube fin-tube type heat exchanger streamlined wait wave amplitude just/cosine-shaped corrugated fin |
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| CN104110991A CN104110991A (en) | 2014-10-22 |
| CN104110991B true CN104110991B (en) | 2016-04-06 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960011914U (en) * | 1994-09-16 | 1996-04-15 | heat transmitter | |
| JP3815491B2 (en) * | 2004-06-30 | 2006-08-30 | ダイキン工業株式会社 | Heat exchanger and air conditioner |
| JP5077926B2 (en) * | 2007-01-25 | 2012-11-21 | 国立大学法人 東京大学 | Heat exchanger |
| CN201672840U (en) * | 2010-05-19 | 2010-12-15 | 张家港市恒强冷却设备有限公司 | Cooling plate with ragged structure and arc bulge layer on bottom plate |
| CN203672213U (en) * | 2013-12-19 | 2014-06-25 | 重庆司莫威尼热力设备有限公司 | Heat exchange tube of wavy fins |
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