CN103245247A - Sweptback type corrugated fin - Google Patents
Sweptback type corrugated fin Download PDFInfo
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- CN103245247A CN103245247A CN2013101982972A CN201310198297A CN103245247A CN 103245247 A CN103245247 A CN 103245247A CN 2013101982972 A CN2013101982972 A CN 2013101982972A CN 201310198297 A CN201310198297 A CN 201310198297A CN 103245247 A CN103245247 A CN 103245247A
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Abstract
The invention discloses a sweptback type corrugated fin. The end surfaces of the sweptback type corrugated fin are connected with side wall surfaces of a heat exchanger in a flatly fitting manner. The sweptback type corrugated fin is characterized in that a certain included angle called a sweepback angle is formed between the front edge and the spanwise direction of the corrugated fin, namely between the front edge of the corrugated fin and the width direction of a heat dissipation flow channel. Compared with a traditional corrugated fin, the sweptback type corrugated fin has the remarkable advantages of high heat exchange efficiency, low flow resistance and the like under the condition of same materials and heat dissipation area. Only the sweepback angle of the corrugated fin is changed, and an existing machining process does not need to be greatly reformed when the sweptback type corrugated fin is actually machined. Therefore, compared with other corrugated fins with strengthened heat exchange functions, the sweptback type corrugated fin has the advantages of simple machining process and the like. Particularly, the sweptback type corrugated fin has unique self-cleaning capacity owing to a special flow structure.
Description
Technical field
The invention belongs to technical field of heat exchangers, be specifically related to a kind of sweepback type ripple heat exchange fin of optimization.
Background technology
That compact heat exchanger owing to have takes up room is little, quality light, heat exchange efficiency high-technology advantage, has been widely used in the related heat radiation field of industries such as automobile, engineering machinery, air conditioning appliance or electronic product.Plate fin type heat exchanger is the important form of compact heat exchanger.As shown in Figure 1, a large amount of plate fin are combined the efficiently radiates heat area that can enlarge markedly heat exchanger, thereby significantly improve the radiating efficiency of heat exchanger.
In order further to improve the heat exchange efficiency of fin, people optimize the surface configuration of fin.Corrugated fin is exactly wherein a kind of, and as shown in Figure 2, corrugated fin 101 and the space that heat-exchanger pipeline side wall surface 1 surrounds constitute a heat radiation runner.Several heat radiation runners are combined, and have just constituted heat exchanger heat exchange core body shown in Figure 1, can be with the high-temperature medium V that flows in the heat-exchanger pipeline
Hot, be passed to fin surface fast as the heat of high-temperature water, oil or solid conductive heat etc., and by near the cooling medium flowing V fin
Cold, as the cooling air, heat is taken away, and it is external finally to diffuse to heat exchanger.
With respect to plain fin, corrugated fin can further increase the contact area of fin and cooling medium, the surface configuration of " ripple " formula will produce perturbation action to the uniform incoming flow of cooling medium simultaneously, even the separation vortex structure of formation large scale, strengthen momentum and energy exchange in the fin near wall region, thereby strengthened the heat-exchange capacity of fin.The corrugated fin patent of this type such as application number or the patent No. are 200410031549.3,200580022014.2, the Chinese patent of 200910115668.X etc.Fig. 2 is the structural representation of the single heat radiation runner of corrugated fin.
Fig. 3 is the separation vortex structure schematic diagram that cooling medium produces when flowing through corrugated fin.Wherein, the 102nd, the corrugated fin leading edge, namely crest extends and the crest line that forms along the fin width direction, also is the facing the wind line of demarcation in district and leeward district of fin.As shown in Figure 3, when cooling medium process corrugated fin leading edge 102, because the medium momentum is not enough to resist the stronger adverse pressure gradient in downstream trough 103 places, cooling medium will form the separation whirlpool 104 of a large scale in leading edge 102 to the leeward district of fin between the trough 103.In separating whirlpool 104, cooling medium is made low-speed rotation.This rotatablely moving the heat transportation of fin surface to heat radiation runner center namely separated 104 upper stratas, whirlpool, thereby played the effect of enhanced heat exchange.But, this separation vortex structure fixed-site, the inner cooling medium flow velocity in separation whirlpool is low, pressure is high.Therefore, this enhanced heat exchange effect of separating the whirlpool generation is very limited.Especially, this separation vortex structure has enlarged markedly the flow resistance of corrugated fin heat radiation runner, and this will directly cause the fan power synchronously raising supporting with heat exchanger, and therefore fan noise also must increase.
Therefore, from the angle of enhanced heat exchange, be necessary above-mentioned conventional wave corrugated fin is done to optimize further or design innovatively, in order to significantly improve the fin heat exchanger effectiveness, and significantly reduce the heat radiation flow passage resistance force of waterproof, and then can reduce the power load of cooperating fan and noise level etc.This is basic goal of the present invention place just.
Summary of the invention
The state of the art at the conventional wave corrugated fin, the present invention has provided a kind of sweepback type ripple heat exchange fin design of optimization, the type fin can be used as heat exchanger core, as shown in Figure 1, be widely used in industries such as automobile, engineering machinery, electrical equipment, the semiconductor related heat radiation or heat exchange field.Compare with the conventional wave corrugated fin, under the identical condition of material, area of dissipation, the sweepback type corrugated fin that the present invention provides has significant advantages such as heat exchange efficiency height, flow resistance be little, and need not existing processing technology is done to revise significantly, therefore has advantages such as processing technology is simple.Especially, this sweepback type corrugated fin has unique automatically cleaning ability owing to fluidal texture is special.
For solving the technical problem that exists in the conventional wave corrugated fin, reach purpose of the present invention, the technical scheme that the present invention takes is as follows:
A kind of sweepback type corrugated fin, its end face and the heat-exchanger pipeline side wall surface is smooth joins is characterized in that: the leading edge of described corrugated fin and its exhibition to, the width of the runner that namely dispels the heat is certain included angle, is referred to as the angle of sweep.In the present invention, the fin leading edge refers to that the crest of corrugated fin extends and the crest line of formation along the fin width direction.In a ripple scope, leading edge is the facing the wind line of demarcation in district and leeward district of fin.
Described angle of sweep is set between 10 ° to 80 ° arbitrarily angled, preferred 30 ° to 60 ° intervals, and the fin flow resistance is little at this moment, heat exchange efficiency is high.
The wavelength of described sweepback type corrugated fin is 2-20mm, and wave amplitude is that 0.2-5mm, fin thickness are 0.05-0.3mm.Mm is the long measure millimeter.
Described sweepback type corrugated fin place runner is long to be 30-300mm, and runner is wide to be 5-20mm, and the runner height is 1-10mm.
With respect to conventional wave corrugated fin as shown in Figure 3, in sweepback type corrugated fin of the present invention, during cooling medium process fin leading edge, its movement velocity V can be decomposed into two parts: the velocity component V1 of vertical fins leading edge, it will impel cooling medium through separating from fin surface after the leading edge, form the separation whirlpool of strong rotation; Also namely separate the velocity component V2 of vortex rotor shaft direction along fin leading edge direction, it will make above-mentioned separation vortex structure stretch along the leading edge direction, separate the whirlpool the most at last and will be drawn into swirling flow to vortex structure, and form strong axial jet Vn at vortex core place.What constantly stretch, accelerate flows to the heat-exchange capacity that the whirlpool has significantly improved cooling medium and fin surface in the runner, axial jet Vn has then reduced the pressure drag of Disengagement zone simultaneously, and the flow resistance of fin runner and pressure drop significantly reduce, heat exchange efficiency significantly improves thereby make.Especially, axial jet Vn can also rush at fin heat radiation runner downstream with the dirt that is deposited in the Disengagement zone.Therefore, the sweepback type corrugated fin that provides of the present invention has unique automatically cleaning ability.And, because this sweepback type corrugated fin has only changed the sweepback angle of conventional wave corrugated fin, therefore need not the existing processing technology of corrugated fin is done to revise significantly, have technical advantages such as processing technology is simple.
" ripple " section shape of sweepback type corrugated fin of the present invention is any one in triangle, rectangle, trapezoidal, arc, trigonometric function curve, power function curve, the SPL, or the combination of these curve shapes.
Described trigonometric function curve comprises sine curve, cosine curve etc.
The manufactured materials of sweepback type corrugated fin of the present invention adopts the nonmetallic materials of metal material, alloy or good heat conductivity etc., and its shape can adopt the particular manufacturing craft rolling forming.
Described sweepback type corrugated fin can be used as heat exchanger core.Wherein, when adjacent sweepback type corrugated fin runner is combined into a big heat dissipation channel, two adjacent both sweepback in the same direction of sweepback type fin, this moment, the leading edge direction of two fins was parallel; Also can be sweepback in the other direction, this moment, the leading edge direction of two fins be intersected mutually.When adopting sweepback in the other direction, because therefore the highly significant of heat radiation runner, has still kept bigger spacing greater than the wave amplitude of corrugated fin between the leading edge of two adjacent fins.
The sweepback type corrugated fin that the present invention provides, can be used as heat exchanger core is installed in the various heat exchangers, as shown in Figure 1, can be widely used in the related heat-exchange apparatus of industries such as automobile, engineering machinery, electrical equipment, semiconductor, such as but not limited to the employed radiator of automobile, engineering machinery, electronics or electric equipment products, condenser, charge air cooler etc.Be different from traditional corrugated fin, in the sweepback type corrugated fin that the present invention provides, cooling medium is flowed through after the fin leading edge, and separated flow flows to longshore current vortex structure, and forms stronger axial jet in the vortex core to continuous stretching, final formation.Compare with the conventional wave corrugated fin, owing to flow to the existence in whirlpool, under the identical condition of material, structural volume or area of dissipation, the sweepback type corrugated fin that the present invention provides will have significant advantages such as heat exchange efficiency height, flow resistance be little.Especially, this sweepback type corrugated fin has unique automatically cleaning ability owing to fluidal texture is special.Therefore, with respect to the conventional wave corrugated fin, the sweepback type corrugated fin that the present invention provides can use in more complicated, worse engineering-environment.And, because this sweepback type corrugated fin has only changed the sweepback angle of conventional wave corrugated fin, therefore need not the existing processing technology of corrugated fin is done to revise significantly, have technical advantages such as processing technology is simple.
Description of drawings
Fig. 1 common heat exchangers heat exchange core body structural representation;
Fig. 2 is the corrugated fin geometry schematic diagram of prior art design;
Fig. 3 is the corrugated fin fluidal texture schematic diagram of prior art design;
Fig. 4 is the geometry schematic diagram of sweepback type corrugated fin among the present invention;
Fig. 5 is the main structure parameters schematic diagram of sweepback type corrugated fin among the present invention;
Fig. 6 is the fluidal texture schematic diagram that cooling medium produces through sweepback type fin among the present invention;
Fig. 7 is two kinds of combination schematic diagrames of adjacent sweepback type fin heat radiation runner;
Fig. 8 is the section shape example of sweepback type corrugated fin among the present invention;
Fig. 9 is heat dispersion and the flow passage resistance force of waterproof performance comparison figure of sweepback type corrugated fin of the present invention and conventional wave corrugated fin;
Wherein: 1 heat exchanger sidewall, 101 corrugated fins, 102 fin leading edges, that is crest, 103 troughs, 104 separate the whirlpool, 201 fins, the 201-1 fin, the 201-2 fin, 202 leading edges, 203 fin crests, 204 troughs, 205 flow to the whirlpool; Re is Reynolds number, is the dimensionless group that characterizes the cooling medium flowing velocity; J is the dimensionless group that characterizes the fin heat dispersion; F is the dimensionless group that characterizes the flow passage resistance force of waterproof performance.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.Should understand the following specific embodiment only is used for explanation the present invention and is not used in and limits the scope of the invention.Need to prove, word " preceding ", " back ", " left side ", " right side ", the "up" and "down" used are described below refer to the direction in the accompanying drawing, word " interior " and " outward " refer to respectively towards or away from the direction of specific features geometric center.
Embodiment 1:
As shown in Figure 4, a kind of sweepback type corrugated fin 201, its end face and 1 smooth joining of heat exchanger side wall surface, the two constitutes a heat radiation runner, and the two can link to each other by modes such as welding.The leading edge 202 of corrugated fin 201 and its exhibition are to, the runner width B of namely dispelling the heat direction, and be in a certain angle, is referred to as angle of sweep β.Described angle of sweep β is 45 °.In the present embodiment, fin leading edge 202 refers to the crest line that corrugated fin crest 203 extends to form, as shown in Figure 5.In a ripple scope, leading edge 202 is the facing the wind lines of demarcation in district and leeward district of fin.
The structural parameters of described fin 201, wavelength
LBe 10mm, wave amplitude
hBe 2mm and fin thickness
tBe 0.1mm.As shown in Figure 4, the wide B of heat radiation runner centered by fin 201 is that 10mm, long A are that 100mm, high S are 3mm.A plurality of heat radiation runners are combined, and constitute a heat exchanger core, as Fig. 1.When adjacent sweepback type corrugated fin runner is combined into a big heat dissipation channel, this both sweepback in the same direction of two fins, this moment, the leading edge direction of two fins was parallel, shown in Fig. 7 a, it also can be sweepback in the other direction, this moment, the leading edge direction of two fins was intersected mutually, shown in Fig. 7 b.
With respect to conventional wave corrugated fin as shown in Figure 3, in the present embodiment, because fin leading edge 202 has certain sweepback angle beta, cooling medium such as air are through leading edge the time, its movement velocity V can be decomposed into two parts, as shown in Figure 6: the velocity component V1 of vertical fins leading edge 202, it will impel cooling medium through separating from fin surface after the leading edge, form the separation whirlpool of strong rotation; Along fin leading edge direction, also namely separate the axial velocity component V2 of rotation in whirlpool, it will make above-mentioned separation vortex structure stretch along the leading edge direction, separate the whirlpool the most at last and will be drawn into and flows to vortex structure 205, and form strong axial jet Vn at vortex core place.What constantly stretch, accelerate flows to the heat-exchange capacity that whirlpool 205 has significantly improved cooling medium and fin surface in the runner, simultaneously axial jet Vn has then reduced the pressure drag of Disengagement zone, thereby makes cooling medium flow resistance and pressure drop significantly reduces, heat exchange efficiency significantly improves in whole fin.Especially, axial jet Vn can also rush at fin heat radiation runner downstream with the dirt that is deposited in the Disengagement zone.Therefore, the sweepback type corrugated fin that provides of present embodiment has unique automatically cleaning ability.
" ripple " section shape of the described sweepback type of present embodiment corrugated fin 201, what adopt is that Fig. 4 is to sine curve shown in Figure 6, but " waveform " that also can adopt triangle shown in Figure 8, rectangle, trapezoidal, arc, power function curve, SPL etc. or be combined by these curve shapes, as shown in Figure 8 back two kinds is the combination of combination, triangle and the straightway of arc and straightway respectively just, and just fin heat dispersion and flow passage resistance force of waterproof characteristic are variant slightly.In the present embodiment, the manufactured materials of sweepback type corrugated fin 201 can adopt the nonmetallic materials of metal material, alloy or good heat conductivity etc., wherein, metal material such as aluminium, copper, gold etc., its shape can adopt the particular manufacturing craft rolling forming.
Embodiment 2
The difference of present embodiment and embodiment 1 is: angle of sweep β is 30 °; The structural parameters of described fin 201, wavelength
LBe 5mm, wave amplitude
hBe 1mm and fin thickness
tBe 0.1mm; The wide B of fin 201 place runners is that 7mm, long A are 70mm, and the high S of fin heat radiation runner is 3mm, and the fin section shape adopts trapezoidal.
Embodiment 3
The difference of present embodiment and embodiment 1 is: angle of sweep β is 60 °; The structural parameters of described fin 201, wavelength
LBe 15mm, wave amplitude
hBe 3mm and fin thickness
tBe 0.1mm; The wide B of fin 201 place runners is that 13mm, long A are 200mm, and the high S of fin heat radiation runner is 3mm, and the fin section shape adopts rectangle.
The difference of present embodiment and embodiment 1 is: angle of sweep β is 10 °; The structural parameters of described fin 201, wavelength
LBe 2mm, wave amplitude
hBe 0.2mm and fin thickness
tBe 0.05mm; The wide B of fin 201 place runners is that 5mm, long A are 30mm, and the high S of fin heat radiation runner is 1mm, and the fin section shape adopts triangle.
Embodiment 5
The difference of present embodiment and embodiment 1 is: angle of sweep β is 80 °; The structural parameters of described fin 201, wavelength
LBe 20mm, wave amplitude
hBe 5mm and fin thickness
tBe 0.3mm; The wide B of fin 201 place runners is that 15mm, long A are 300mm, and the high S of fin heat radiation runner is 10mm, and the fin section shape adopts arc.
Embodiment 6
The difference of present embodiment and embodiment 1 is: angle of sweep β is 50 °; The structural parameters of described fin 201, wavelength
LBe 8mm, wave amplitude
hBe 1mm and fin thickness
tBe 0.15mm; The wide B of fin 201 place runners is that 20mm, long A are 50mm, and the high S of fin heat radiation runner is 4mm, and the fin section shape adopts arc shown in Figure 8 and the combination of straightway.
Embodiment 7
The difference of present embodiment and embodiment 1 is: angle of sweep β is 40 °; The structural parameters of described fin 201, wavelength
LBe 12mm, wave amplitude
hBe 1.5mm and fin thickness
tBe 0.18mm; The wide B of fin 201 place runners is that 10mm, long A are 150mm, and the high S of fin heat radiation runner is 2mm, and the fin section shape adopts triangle shown in Figure 8 and the combination of straightway.
Embodiment 8
The difference of present embodiment and embodiment 1 is: angle of sweep β is 55 °; The structural parameters of described fin 201, wavelength
LBe 6mm, wave amplitude
hBe 1.5mm and fin thickness
tBe 0.2mm; The wide B of fin 201 place runners is that 12mm, long A are 170mm, and the high S of fin heat radiation runner is 6mm, and the fin section shape adopts SPL.
Embodiment 9
The difference of present embodiment and embodiment 1 is: angle of sweep β is 10 °; The structural parameters of described fin 201, wavelength
LBe 17mm, wave amplitude
hBe 2.5mm and fin thickness
tBe 0.0.25mm; The wide B of fin 201 place runners is that 17mm, long A are 250mm, and the high S of fin heat radiation runner is 8mm, and the fin section shape adopts trapezoidal.
Embodiment 10
The difference of present embodiment and embodiment 1 is: angle of sweep β is 45 °; The structural parameters of described fin 201, wavelength
LBe 6mm, wave amplitude
hBe 0.8mm and fin thickness
tBe 0.15mm; The wide B of fin 201 place runners is that 9.6mm, long A are 120mm, and the high S of fin heat radiation runner is 5mm, and the fin section shape adopts arc.
The described sweepback type of embodiment 1-10 corrugated fin, fin 201 end faces and heat exchanger side wall surface 1 are smooth, and the two constitutes a heat radiation runner.What flow in the heat radiation runner is the cooling air, and air velocity V is 9.5m/s; And in heat-exchanger pipeline, namely the opposite side of side wall surface 1 flows be 80 ℃ high-temperature water as shown in Figure 1.
(a is embodiment 10 described sweepback type corrugated fins and heat dispersion and the flow passage resistance force of waterproof performance comparison figure of the non-sweepback type corrugated fin of identical material, identical section shape b) to Fig. 9.This figure shows: at flow reynolds number Re=1000 o'clock of cold air air, radiating efficiency with the sweepback type corrugated fin of dimensionless group j factor representation has improved 15.1%, reach 0.0093, reduced by 22.5% with the flow passage resistance force of waterproof of dimensionless group f factor representation, be down to 0.0705; Under other mobile Reynolds numbers, the heat dispersion of sweepback type corrugated fin and flow passage resistance force of waterproof characteristic also have the improvement of corresponding amplitude.Test result shows, compares with the non-sweepback corrugated fin of identical material, identical section shape, and the described sweepback type of embodiment 1-9 corrugated fin also has the performance boost effect consistent with embodiment 10.Wherein, improve 5%-20% with the fin heat dispersion of j factor representation, reduced 10%-60% with the flow passage resistance force of waterproof of f factor representation.
To sum up, through embodiment repeatedly with detect proof, flow reynolds number Re=960 o'clock of sweepback type corrugated fin of the present invention, cooling medium, the j factor reaches as high as 0.021, the f factor can be reduced to 0.055.
Be noted that above-described embodiment only is used for explanation technological use of the present invention, but not limitation of the present invention.Those skilled in the art, the various variations of making in essential scope of the present invention or alternative also should belong to protection category of the present invention.
Claims (10)
1. sweepback type corrugated fin, its end face and the heat exchanger side wall surface is smooth joins is characterized in that: the leading edge of described corrugated fin and its exhibition to, the runner width that namely dispels the heat is certain included angle, is referred to as the angle of sweep.
2. sweepback type corrugated fin according to claim 1 is characterized in that: described angle of sweep is set to 10 degree to arbitrarily angled between 80 degree.
3. sweepback type corrugated fin according to claim 2 is characterized in that: described angle of sweep is set to 30 degree to arbitrarily angled between 60 degree.
4. according to each described sweepback type corrugated fin of claim 1-3, it is characterized in that: the wavelength of described corrugated fin is the 2-20 millimeter, and wave amplitude is the 0.2-5 millimeter, and fin thickness is the 0.05-0.3 millimeter.
5. according to each described sweepback type corrugated fin of claim 1-3, it is characterized in that: fin place runner is long to be the 30-300 millimeter, and runner is wide to be the 5-20 millimeter, and the runner height is the 1-10 millimeter.
6. sweepback type corrugated fin according to claim 4 is characterized in that: fin place runner is long to be the 30-300 millimeter, and runner is wide to be the 5-20 millimeter, and the runner height is the 1-10 millimeter.
7. sweepback type corrugated fin according to claim 1, it is characterized in that: " ripple " of described fin is shaped as any one in triangle, rectangle, trapezoidal, arc, trigonometric function curve, power function curve, the SPL, or the combination of these curve shapes.
8. sweepback type corrugated fin according to claim 1 is characterized in that: any one in the nonmetallic materials of manufactured materials employing metal material, alloy or the good heat conductivity of described corrugated fin.
9. the described sweepback type of claim 1 corrugated fin is as the heat radiation core body of heat exchanger.
10. sweepback type corrugated fin according to claim 9 is characterized in that as the heat radiation core body of heat exchanger: two adjacent sweepback type fins, sweepback in the same direction, perhaps sweepback in opposite direction.
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| CN2013101982972A CN103245247A (en) | 2013-05-24 | 2013-05-24 | Sweptback type corrugated fin |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101243A (en) * | 2014-08-01 | 2014-10-15 | 兰州交通大学 | Streamline amplitude-variable folded-line-shaped corrugated fin of round tube fin type heat exchanger |
| CN104110986A (en) * | 2014-08-01 | 2014-10-22 | 兰州交通大学 | Streamline variable-amplitude arc-shaped wavy fin for round tube fin heat exchanger |
| CN104142083B (en) * | 2014-08-01 | 2016-05-18 | 兰州交通大学 | The streamlined change wave amplitude of elliptical tube fin-tube type heat exchanger fold-line-shaped corrugated fin |
| CN107069141A (en) * | 2017-05-12 | 2017-08-18 | 四川力垦锂动力科技有限公司 | Heat dissipation of lithium battery device for electric automobile |
| CN108871037A (en) * | 2018-07-04 | 2018-11-23 | 陕西观能机电科技有限公司 | A kind of cooler prolongs resistance fin with low |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101243A (en) * | 2014-08-01 | 2014-10-15 | 兰州交通大学 | Streamline amplitude-variable folded-line-shaped corrugated fin of round tube fin type heat exchanger |
| CN104110986A (en) * | 2014-08-01 | 2014-10-22 | 兰州交通大学 | Streamline variable-amplitude arc-shaped wavy fin for round tube fin heat exchanger |
| CN104110986B (en) * | 2014-08-01 | 2016-01-06 | 兰州交通大学 | Circular pipe pipe fin heat exchanger streamlined change wave amplitude circular arc corrugated fin |
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| CN107069141A (en) * | 2017-05-12 | 2017-08-18 | 四川力垦锂动力科技有限公司 | Heat dissipation of lithium battery device for electric automobile |
| CN107069141B (en) * | 2017-05-12 | 2019-06-04 | 四川力垦锂动力科技有限公司 | Heat dissipation of lithium battery device for electric car |
| CN108871037A (en) * | 2018-07-04 | 2018-11-23 | 陕西观能机电科技有限公司 | A kind of cooler prolongs resistance fin with low |
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Application publication date: 20130814 |