CN107449308A - A kind of impinging cooling system with arc-shaped surface boss - Google Patents
A kind of impinging cooling system with arc-shaped surface boss Download PDFInfo
- Publication number
- CN107449308A CN107449308A CN201710567824.0A CN201710567824A CN107449308A CN 107449308 A CN107449308 A CN 107449308A CN 201710567824 A CN201710567824 A CN 201710567824A CN 107449308 A CN107449308 A CN 107449308A
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- China
- Prior art keywords
- arc
- shaped surface
- jet
- surface boss
- target plate
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0028—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a kind of impinging cooling system with arc-shaped surface boss, and using jet impulse technology, arc-shaped surface mesa array is laid on impact target plate, is provided with fluidic plate and is used for the jet orifice that fluid forms multiple jetses；Arc-shaped surface boss is located at jet orifice central lower, and the impact jet flow for coming from jet orifice is carried out to the flow direction of dispersed and gentle change jet by the curved surface of arc-shaped surface boss.The mobility status of impinging cooling system enhancement impact target plate overdraught, reduces thermograde, makes heat transfer distribution more uniform, reduces thermal stress and concentrate, improves the overall heat-transfer capability of the system；By flowing to the gentle change of cooling air-flow, the stagnation region loss of momentum and the pressure loss are reduced so that cooling air-flow can cover bigger area.Impinging cooling system applies also for the drying of textile, timber, the cooling or heating of metal material, the cooling technology field of aero engine turbine blades.
Description
Technical field
The present invention relates to a kind of impinging cooling system, specifically, is related to a kind of with the heat transfer point of arc-shaped surface boss
The uniform high-performance impinging cooling system of cloth.
Technical background
As electronic device constantly develops towards the direction of high integration, miniaturization, high power consumption, its heat flow density carries rapidly
One of the main reason for height, electronic equipment overheat or thermal defect are electronic product failures, develops so cooling problem turns into restrict
A bottleneck.Impact jet flow has the more exchange capability of heat stronger than conventional flowing, is solution as a kind of unique type of flow
The certainly scheme for having much potentiality of high-density electronic device heat dissipation problem.
Advanced efficient impinging cooling technology is modern high performance gas turbine/high-temperature unit of aircraft engine such as turbine leaf
The key technology that the coolings such as piece, combustion chamber must use, to ensure gas engine high-temperature component high efficiency, work with high reliability,
And there is enough life cycles.There is impinging cooling itself feature to make it be especially suitable for cooling down, and heat load intensity is big, space
The limited cooling in region, the leading edge of such as turbo blade, combustion chamber wall surface cooling.Impinging cooling process medium fluid, which directly impacts, to be needed
The surface to be cooled down, flow is short, and very thin boundary layer is formed about in stagnation point, thus is imitated with very high heat transfer
Rate.
As requirement of the civil aviation to engine high-efficiency rate and ordnance engine carry to the continuous of requirement of performance, thrust
Height, engine chamber and turbine entrance temperature temperature constantly rise, it is necessary to develop it is more advanced, there is more efficient heat-transfer capability
And heat transfer is set to be distributed more uniform impinging cooling technology.Efficient impinging cooling system can improve the work of high-temperature component
In the life-span, reduce the consumption of cooling air, so as to improve the operating efficiency of engine, reduce maintenance cost.
Impinging cooling system typically by multiple jet plate, impacts target plate, and by between multiple jet plate and impact target plate
The coolant flow channel of formation is formed.Air-flow, into multiple jetses, the jet impulse to target plate surface, is formed by multiple jet plate shape
Impinging cooling.As shown in Figure 1.But from the point of view of the service condition of existing impinging cooling system, still with certain limitation
Property：(1) also need to further improve wall total heat transfer coefficient, to improve the heat-transfer capability of existing impact system, so as to
Enough adapt to the demand of ever-increasing high cooling load；(2) in existing impinging cooling system, the jet impulse on impact wall
Heat transfer coefficient in region is very high；But in the jet stagnation point area of target plate because effluxvelocity moment is reduced to 0 and jet side
To there occurs 90 degree of deflection, thus cause the great loss of momentum and the pressure loss；(3) barometric gradient in impact zone and
Velocity gradient easily causes greatly cooled region and forms larger thermograde, causes thermal stress to cause heat fatigue, to impingement wall
The structural strength in face causes strong influence, especially prominent on gas turbine and the turbo blade of aero-engine.
The content of the invention
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of impinging cooling with arc-shaped surface boss
System.
The technical solution adopted for the present invention to solve the technical problems is:Including fluidic plate, impact target plate, jet orifice, cold
But runner, arc-shaped surface boss, coolant flow channel is formed between fluidic plate and impact target plate, the fluidic plate, which is provided with, makes stream
Body forms the jet orifice of jet, is provided with arc-shaped surface mesa array on the impact target plate, arc-shaped surface boss is located at
On the impact target plate of jet orifice central lower；The arc-shaped surface boss is the conical structure with arc generatrix, circular arc
Shape curved surface boss height HcFor 0.2~4Dj, arc-shaped surface boss bottom radius RcFor 0.5~5Dj, arc-shaped surface boss
Arc generatrix radius RhFor 0.3~16Dj；The jet bore dia DjFor 0.5~8mm；Spacing H between fluidic plate and impact target plate
For 1~8Dj。
The jet orifice is multiple, and jet orifice is laid in fluidic plate into array, and jet orifice central lower is corresponding with circular arc
Shape curved surface boss, spacing Wc is 20~25D between two jet orificesj。
The arc-shaped surface boss laid on the impact target plate is separate structure.
Beneficial effect
A kind of impinging cooling system with arc-shaped surface boss proposed by the present invention, using jet impulse technology,
Impact and arc-shaped surface mesa array laid on target plate, be provided with fluidic plate and be used for the jet orifice that fluid forms multiple jetses,
Arc-shaped surface boss is located at jet orifice central lower, and the curved face by arc-shaped surface boss will come from rushing for jet orifice
Slap shot stream carries out the flow direction of dispersed and gentle change jet.The stream of impinging cooling system enhancement target plate overdraught
Emotionally condition, reduction thermograde, make heat transfer distribution more uniform, reduce thermal stress and concentrate, improve impinging cooling system entirety
Heat-transfer capability；By flowing to the gentle change of cooling air-flow, the stagnation region loss of momentum and the pressure loss are reduced so that cooling
Air-flow can cover bigger area.Impinging cooling system also can be widely used to the drying of textile, paper, timber, steel
Cooling or heating, the deicing of aircraft wing, the cooling engineering field of aero engine turbine blades.
Brief description of the drawings
Make below in conjunction with the accompanying drawings with the embodiment impinging cooling system with arc-shaped surface boss a kind of to the present invention
It is further described.
Fig. 1 is the impinging cooling system schematic of prior art.
Fig. 2 is the impinging cooling system schematic that the present invention carries arc-shaped surface boss.
Fig. 3 is conventional cone and arc-shaped surface boss contrast schematic diagram.
Fig. 4 is the impinging cooling system schematic in the embodiment of the present invention 1.
Fig. 5 is the impact system target plate schematic diagram in the embodiment of the present invention 1.
Fig. 6 is impinging cooling system of the present invention and corresponding planar surface impinging cooling system Nu number comparison diagrams.
Fig. 7 is the impinging cooling system schematic in the embodiment of the present invention 2.
Fig. 8 is the impact system target plate schematic diagram in the embodiment of the present invention 2.
In figure
The arc-shaped surface of 6. the wall jet 7. 1. coolant flow channel 5. of 2. impact jet flow of fluidic plate, 3. jet orifice 4. flows over
Boss 8. impacts the cone of target plate 9.
DjSpacing H between jet bore dia H. fluidic plates and impact target platecArc-shaped surface boss height
RcArc-shaped surface boss bottom radius RhThe arc generatrix radius of arc-shaped surface boss
WcSpacing between jet orifice
Embodiment
The present embodiment is a kind of impinging cooling system with arc-shaped surface boss.
Refering to Fig. 2, Fig. 3, the present embodiment carries the impinging cooling system of arc-shaped surface boss, by fluidic plate 1, impact target
Plate 8, jet orifice 3, coolant flow channel 4, arc-shaped surface boss 7 form；Cooling stream is formed between fluidic plate 1 and impact target plate 8
Road 4, the jet orifice 3 for making fluid form jet is machined with fluidic plate 1；7 gusts of arc-shaped surface boss is provided with impact target plate 8
Row, arc-shaped surface boss 7 are located on the impact target plate 8 immediately below jet orifice 3.Arc-shaped surface boss 7 is with circular arc line
Conical structure, the height H of arc-shaped surface bosscScope is 0.2~4Dj, arc-shaped surface boss bottom radius RcTake
Value scope is 0.5~5Dj, the arc generatrix radius R of arc-shaped surface bosshScope is 0.3~16Dj.The diameter D of jet orifice 3jFor
0.5~8mm；Fluidic plate 1 is 1~8D with the scope for impacting the distance between target plate 8 Hj。
In the present embodiment, jet orifice 3 is multiple, and jet orifice 3 is set on impact target plate 8 for array distribution, in jet orifice 3
Arc-shaped surface boss 7 is corresponding with below the heart, the spacing Wc of two jet orifices is 20~25Dj.The circle set on impact target plate 8
Arc-shaped curved surface boss is separate structure.Cooling blast 2 impacts target plate 8 by 3 vertical directive of jet orifice, and jet passes through circular arc
Shunting formed on the top of shape curved surface boss 7, cooling stream by the circular arc camber transition rear of arc-shaped surface boss 7 to change,
From perpendicular to impact target plate 8 direction be changed into parallel to impact target plate 8 direction, parallel to impact target plate 8 jet flow into
For the flowing of crossing current 5.
Embodiment 1
The present embodiment is a kind of single hole jet impulse cooling system, and as shown in Figure 4, Figure 5, the impinging cooling system includes single
Hole fluidic plate 1 and impact target plate 8, form coolant flow channel 4, single hole fluidic plate 1 has between single hole fluidic plate 1 and impact target plate 8
Fluid is set to form the jet orifice 3 of single jet, fluid forms single jet by the jet orifice 3 in single hole fluidic plate 1 and impacted
The wall for impacting target plate 8 forms wall jet, and is formed and flow over along flow direction.Arrow 5 represents the flow direction of crossing current, arrow
First 6 represent the flow direction of wall jet.
In the present embodiment, single jet orifice 3 is single arrangement in fluidic plate 1, impacts on target plate 8 and is provided with a circular arc
Shape curved surface boss 7, the arc-shaped surface boss 7 are located at the underface impact jet flow 2 of jet orifice 3 at the projection of impact target plate 8.
The diameter D of jet orifice 3jFor 5mm, the spacing H of single hole jet orifice plate 1 and impact target plate 8 is 20mm, arc-shaped surface boss bottom
Radius RcFor 15mm, the generatrix radius R of arc-shaped surface bosshFor 15mm；The high H of arc-shaped surface bosscFor 6mm.In this example
Arc-shaped surface boss by finish forge pressure, Milling Machining, punching press or welding forming in impact target plate 8 wall on.
This example impinging cooling system sets arc-shaped surface boss on impact target plate 8, passes through arc-shaped surface boss
The curved face of side is uniformly disperseed the impact jet flow for coming from jet orifice 3, and the flowing side of gentle change jet
To avoiding jet from directly impacting impact target plate 8 wall and form stagnation region；The violent change for reducing velocity attitude simultaneously is formed sternly
Weight vortex, reduce jet be directly impinging impact target plate 8 cause effluxvelocity moment be reduced to 0 caused by the loss of momentum and pressure
Power is lost；So as to reduce the larger thermal stress that thermograde is brought, the uniform performance of heat transfer of the impact wall of target plate 8 is improved.Whirlpool
The decrease of stream also reduce wall jet momentum loss so that wall jet is flowable farther, cooling stream can cover compared with
Big scope.Because the height of arc-shaped surface boss is smaller in this example, and side is curved-surface structure so that impinging cooling system
The pressure loss of system is obviously reduced, and weight will not substantially increase.
Fig. 6 is the cooling of the surface impacts with arc-shaped surface boss of this example and exerting for corresponding plate impact cooling
Sai Er numbers compare figure.The surface impacts cooling structure with arc-shaped surface boss that bright example of the chart provides is and related
Only planar surface impinging cooling structure, the comparison of nusselt number Nu under the same conditions.Nusselt number Nu is reaction
The strong and weak dimensionless number of heat convection, the nusselt number Nu that the surface impacts with arc-shaped surface boss in this example cool down
Nusselt number Nu than corresponding planar surface impinging cooling is high by more than 30%；If in view of with arc-shaped surface boss
Area of surface-heat transfer increase than corresponding flat board, therefore total heat exchange property, the surface impacts for having arc-shaped surface boss cool down
About 10% is improved than corresponding planar surface impinging cooling performance.Surface cooling structure with arc-shaped surface boss is with significantly
Improve heat transfer/cooling performance.
Embodiment 2
The present embodiment is a kind of multiple jet impinging cooling system, and as shown in Figure 7, Figure 8, the impinging cooling system includes more
Hole fluidic plate 1, impact target plate 8, form coolant flow channel 4, are processed on multiple jet plate 1 between multiple jet plate 1 and impact target plate 8
There is the jet orifice 3 for making fluid form multiple jetses, fluid forms multiple jetses by the jet orifice 3 on multiple jet plate 1 and impacted
Wall to impact target plate 8 forms wall jet, and is formed and flow over along flow direction；The direction of arrow 5 represents the stream of crossing current
Dynamic direction, arrow 6 represent the flow direction of wall jet.
In the present embodiment, multiple jet orifices are set in fluidic plate 1 for array distribution, are impacted on target plate 8 and are provided with circular arc
Shape curved surface mesa array；The arc-shaped surface mesa array includes 25 arc-shaped surface boss, and each jet orifice 3 is impacting
Set arc-shaped surface boss 7 corresponding at the projection of target plate 8, the spacing W of each two arc-shaped surface bosscFor 20 times penetrate
The diameter of flowing hole, each arc-shaped surface boss 7 is separate.In the present embodiment, jet bore dia DjIt is porous to penetrate for 3mm
Spacing H is 30mm, arc-shaped surface boss bottom radius R between flowing plate 1 and impact target plate 8cValue 12mm, arc-shaped surface are convex
Platform generatrix radius RhValue 10mm, arc-shaped surface boss height HcValue 10mm, spacing W between each two jet orificecFor
60mm。
The impinging cooling system of this example sets arc-shaped surface boss on impact target plate 8, convex by arc-shaped surface
Platform side is uniformly disperseed the impact jet flow from jet orifice 3, and the flow direction of gentle change jet, avoids penetrating
Stream is directly impinging impact target plate 8 plane and forms stagnation region, and the violent change for weakening velocity attitude forms serious vortex, reduces
Jet be directly impinging impact target plate 8 cause effluxvelocity moment be reduced to 0 caused by the loss of momentum and the pressure loss, do not have
Stagnation region is also just without thing followed velocity gradient, barometric gradient and thermograde.So as to reduce thermograde band
The thermal stress come, improve the uniform performance of heat transfer of the impact wall of target plate 8；The decrease of vortex also reduces the momentum of wall jet
Loss so that wall jet is flowable farther, and cooling stream can cover larger scope.Due to the height of arc-shaped surface boss
Degree is smaller, and side is curved-surface structure so that the pressure loss of impinging cooling system is obviously reduced, and weight will not substantially increase
Add.
Claims (3)
- A kind of 1. impinging cooling system with arc-shaped surface boss, it is characterised in that:Including fluidic plate, impact target plate, penetrate Discharge orifice, coolant flow channel, arc-shaped surface boss, coolant flow channel is formed between fluidic plate and impact target plate, in the fluidic plate Provided with the jet orifice for making fluid form jet, arc-shaped surface mesa array, arc-shaped surface are provided with the impact target plate Boss is located on the impact target plate of jet orifice central lower；The arc-shaped surface boss is the cone knot with arc generatrix Structure, arc-shaped surface boss height HcFor 0.2~4Dj, arc-shaped surface boss bottom radius RcFor 0.5~5Dj, circular arc song The arc generatrix radius R of face bosshFor 0.3~16Dj；The jet bore dia DjFor 0.5~8mm；Fluidic plate and impact target plate Between spacing H be 1~8Dj。
- 2. the impinging cooling system according to claim 1 with arc-shaped surface boss, it is characterised in that:The jet Hole is multiple, and jet orifice is laid in fluidic plate into array, and jet orifice central lower is corresponding with arc-shaped surface boss, and two are penetrated Spacing Wc is 20~25D between discharge orificej。
- 3. the impinging cooling system according to claim 1 with arc-shaped surface boss, it is characterised in that:The impact The arc-shaped surface boss laid on target plate is separate structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710567824.0A CN107449308A (en) | 2017-07-13 | 2017-07-13 | A kind of impinging cooling system with arc-shaped surface boss |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710567824.0A CN107449308A (en) | 2017-07-13 | 2017-07-13 | A kind of impinging cooling system with arc-shaped surface boss |
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| CN107449308A true CN107449308A (en) | 2017-12-08 |
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| CN201710567824.0A Pending CN107449308A (en) | 2017-07-13 | 2017-07-13 | A kind of impinging cooling system with arc-shaped surface boss |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737788A (en) * | 2018-12-21 | 2019-05-10 | 西北工业大学 | A kind of raised target plate structure reducing flow losses, intensifying impact heat exchange |
| EP3502562A1 (en) * | 2017-12-19 | 2019-06-26 | United Technologies Corporation | Apparatus and method for mitigating particulate accumulation on a component of a gas turbine engine |
| CN110145371A (en) * | 2019-05-31 | 2019-08-20 | 西北工业大学 | It is a kind of with conical boss and to open up to the target plate structure being interrupted straight rib and combining |
| CN110242357A (en) * | 2018-03-09 | 2019-09-17 | 中国联合重型燃气轮机技术有限公司 | The blade of gas turbine |
| CN110504548A (en) * | 2019-07-18 | 2019-11-26 | 西安电子科技大学 | The frequency selection device that radiates based on liquid metal |
| EP3677837A1 (en) * | 2019-01-04 | 2020-07-08 | United Technologies Corporation | Combustor cooling panel with flow guide |
| CN113225997A (en) * | 2021-05-13 | 2021-08-06 | 西北工业大学 | Take enhancement of multistage cylindrical boss to strike heat transfer structure |
| CN113374546A (en) * | 2021-06-27 | 2021-09-10 | 西北工业大学 | Array impact structure based on circular truncated cone and cylindrical bulge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110504548A (en) * | 2019-07-18 | 2019-11-26 | 西安电子科技大学 | The frequency selection device that radiates based on liquid metal |
| CN113225997A (en) * | 2021-05-13 | 2021-08-06 | 西北工业大学 | Take enhancement of multistage cylindrical boss to strike heat transfer structure |
| CN113374546A (en) * | 2021-06-27 | 2021-09-10 | 西北工业大学 | Array impact structure based on circular truncated cone and cylindrical bulge |
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