CN104154791A - Streamline constant-amplitude parabolic corrugated fin for elliptical tube and fin heat exchanger - Google Patents
Streamline constant-amplitude parabolic corrugated fin for elliptical tube and fin heat exchanger Download PDFInfo
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- CN104154791A CN104154791A CN201410375540.8A CN201410375540A CN104154791A CN 104154791 A CN104154791 A CN 104154791A CN 201410375540 A CN201410375540 A CN 201410375540A CN 104154791 A CN104154791 A CN 104154791A
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Abstract
Disclosed is a streamline constant-amplitude parabolic corrugated fin for an elliptical tube and fin heat exchanger. According to the direction of streamlines, from an air inlet to an air outlet, streamline parabolic convex corrugations 4 and streamline parabolic concave corrugations 5 with alternate convexes and concaves are made on a fin 1 by continuous stamping. Corrugation area edges (8) are both streamlined; before stamping, a center surface O-O of a front fin (a flat sheet) is determined with stream function values. All of the corrugations are the same in amplitude which is 0.1-0.9 times the spacing of fins. The streamlines allow no reflow to occur to the tail, which the fin 1 corresponds to, of a flat fin side passage of the tube and fin heat exchanger along the tube axial center section. Round tubes can be arranged in line or in a crossing manner. Convex corrugations 4 or concave corrugations 5 are symmetrically distributed around longitudinal and transverse center lines of tube holes 2. When fluid flows by the streamline constant-amplitude parabolic corrugated fin, part of the fluid flows in streamline passages formed by the convex corrugations 4 and the concave corrugations 5, flow resistance is reduced, and heat exchange capability of the fin is improved.
Description
Technical field
The present invention relates to elliptical tube fin-tube type heat exchanger fin, particularly the streamlined wave amplitude parabolical corrugated fin that waits of a kind of elliptical tube fin-tube type heat exchanger.
Background technology
Fin-tube type heat exchanger application is very extensive, and total energy consumption is very large, thereby it is extremely important to strengthen the heat transfer characteristic of such heat exchanger.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.Conventionally reduce the thermal resistance of air side by the difform fin of shape.The conventional fin shape that is conducive to augmentation of heat transfer has shutter, ripple, whirlpool generator, discontinuous aunular surface groove, the vertical thorn of rhombus etc.
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 elliptical tube afterbody form be unfavorable for conduct heat recirculating zone.Now can not improve the flow through cleanliness of wing side of fluid with fin.
Summary of the invention
Thinking of the present invention is to flow by set streamline by streamlined wavy channel guiding fluid, suppression fluid lift-off, reduce flowing pressure loss, simultaneously expand fin surface long-pending, improve fin and flow and the object of heat exchange combination property.
For realizing above object, the technical scheme that the present invention proposes is the streamlined wave amplitude parabolical corrugated fin that waits of a kind of elliptical tube fin-tube type heat exchanger of design, on described fin, extrudes the alternate protruding ripple 4 of streamlined parabolical and the recessed ripple 5 of streamlined parabolical of convex-concave according to streamline trend from air flow inlet to outlet continuous punching.
On described streamlined 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.
On described streamlined fin 1, the ripply wave amplitude of institute is identical, is 0.1-0.9 times of spacing of fin.
The transverse shape of the protruding parabolical ripple 4 of described streamlined fin 1, recessed parabolical ripple 5 is parabola.Its parabolical definite method 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 C-C 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, move up and down 10 "-14 ", intersection point 10 '-14 ' point be clipped to by wave amplitude size vertical central plane O-O, 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 shape parabolic 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 the axial central cross-section pipe tail 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 ripple area border 8 value of stream function.
The arrangement mode of elliptical tube can be that in-line arrangement can be also fork row.
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 elliptical ring 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 elliptical ring boss 3 on described streamlined fin 1 can change, and for regulating spacing of fin, welding rear boss contact with elliptical tube tightly, plays to fix fin and reduce the effect of thermal resistance.
After streamlined fin and elliptical tube subgroup dress, in the time that fluid flows between streamlined fin, streamlined convex-concave ripple by fin surface continuously guides, fluid mainly flows along set streamline, and cross section flowing velocity is more even, and the lift-off of pipe afterbody fluid has obtained effective inhibition, improved elliptical tube afterbody heat exchange, reduced flow resistance, convex-concave ripple has increased fin surface area, has reduced heat transfer resistance, has improved the exchange capability of heat of fin.
Brief description of the drawings
Fig. 1 is the streamlined wave amplitude parabolical corrugated fin that waits of a kind of elliptical tube fin-tube type heat exchanger.
Fig. 2 is that parabolical ripple molded line is determined method schematic diagram
Label in Fig. 1: 1. fin; 2. oval pore on fin; 3. elliptical ring boss; 4. streamlined protruding ripple; 5. streamlined recessed ripple; 6. parabola ripple shape; 7. flange; 8. ripple area border.
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 C-C; 10 "-14 " be by wave amplitude size vertical central plane O-O move up and down 10 '-14 ' after corresponding points; A, b, c and d be respectively 10 ' and 11 ', 11 ' and 12 ', 12 ' and 13 ', 13 ' and 14 ' mid point.
Detailed description of the invention
Referring to Fig. 1-2, the streamlined protruding ripple 4, the recessed ripple 5 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.The streamlined protruding ripple 4 of root (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 of pore 2 respectively.Streamlined protruding ripple 4 and recessed ripple 5 are all along the longitudinal from air flow inlet to outlet continuous distributed.Streamlined protruding ripple 4 is constant with the wave amplitude of recessed ripple 5, wave amplitude is spacing of fin 0.1-0.9 times.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 C-C 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, move up and down 10 "-14 ", intersection point 10 '-14 ' point be clipped to by wave amplitude size vertical central plane O-O, 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 shape parabolic equation of protruding ripple 4 and recessed ripple 5.
The present invention, after fin 1 punch forming, is sleeved on fin 1 on elliptical tube through elliptical aperture 2, and 1 of fin is located by elliptical ring 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 welding, pipe.
In the time that fluid is flowed through streamlined corrugated fin, by the parabola shaped protruding ripple 4 on streamlined corrugated fin surface and the continuously guiding of recessed ripple 5, fluid mainly flows along set streamline, fluid velocity is even, flow steadily, can effectively suppress the lift-off of elliptical tube afterbody fluid, improve the heat exchange property between elliptical tube and fin and fluid and can obviously reduce flowing pressure loss.
Claims (7)
1. the streamlined wave amplitude parabolical corrugated fin that waits of elliptical tube fin-tube type heat exchanger, is characterized in that: at fin (1), above moving towards continuous punching along fluid flow line extrudes complete streamlined parabola shaped protruding ripple (4) and parabola shaped recessed ripple (5); Same trough, crest line are streamline; The ripply wave amplitude of institute is identical.
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, determine as required with value of stream function.
3. streamlined fin according to claim 1 (1), it is characterized in that protruding parabolical ripple (4), the transverse shape of recessed parabolical ripple (5) is parabola, parabolical definite method 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, move up and down 10 "-14 ", intersection point 10 '-14 ' point be clipped to by wave amplitude size vertical central plane O-O, 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 shape parabolic equation of protruding ripple (4) and recessed ripple (5).
4. streamlined fin according to claim 1 (1), the wave amplitude that it is characterized in that protruding ripple (4), recessed ripple (5) is spacing of fin 0.1-0.9 times.
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 as required 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 longitudinal and transverse center line of hole (2) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410375540.8A CN104154791B (en) | 2014-08-01 | 2014-08-01 | Elliptical tube fin-tube type heat exchanger is streamlined waits wave amplitude parabolical corrugated fin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410375540.8A CN104154791B (en) | 2014-08-01 | 2014-08-01 | Elliptical tube fin-tube type heat exchanger is streamlined waits wave amplitude parabolical corrugated fin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104154791A true CN104154791A (en) | 2014-11-19 |
| CN104154791B CN104154791B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410375540.8A Active CN104154791B (en) | 2014-08-01 | 2014-08-01 | Elliptical tube fin-tube type heat exchanger is streamlined waits wave amplitude parabolical corrugated fin |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3887004A (en) * | 1972-06-19 | 1975-06-03 | Hayden Trans Cooler Inc | Heat exchange apparatus |
| JPH0886582A (en) * | 1994-09-16 | 1996-04-02 | Samsung Electronics Co Ltd | Heat exchanger |
| JPH09318285A (en) * | 1996-05-28 | 1997-12-12 | Sanyo Electric Co Ltd | 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 |
-
2014
- 2014-08-01 CN CN201410375540.8A patent/CN104154791B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3887004A (en) * | 1972-06-19 | 1975-06-03 | Hayden Trans Cooler Inc | Heat exchange apparatus |
| JPH0886582A (en) * | 1994-09-16 | 1996-04-02 | Samsung Electronics Co Ltd | Heat exchanger |
| JPH09318285A (en) * | 1996-05-28 | 1997-12-12 | Sanyo Electric Co Ltd | 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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|---|---|
| CN104154791B (en) | 2016-08-24 |
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