CN110425570A - A kind of air-lubricating oil face formula radiator - Google Patents
A kind of air-lubricating oil face formula radiator Download PDFInfo
- Publication number
- CN110425570A CN110425570A CN201910617584.XA CN201910617584A CN110425570A CN 110425570 A CN110425570 A CN 110425570A CN 201910617584 A CN201910617584 A CN 201910617584A CN 110425570 A CN110425570 A CN 110425570A
- Authority
- CN
- China
- Prior art keywords
- lubricating oil
- radiator
- heat exchanger
- air
- face formula
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 30
- 239000003921 oil Substances 0.000 claims description 16
- 238000001816 cooling Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 239000010705 motor oil Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- DSCFFEYYQKSRSV-KLJZZCKASA-N D-pinitol Chemical compound CO[C@@H]1[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)[C@H]1O DSCFFEYYQKSRSV-KLJZZCKASA-N 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
-
- 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
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
- F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
Abstract
The present invention provides a kind of air-lubricating oil face formula radiator, the heat exchange pipeline inner wall of the radiator has axial keyway with rifling formula screw thread, outside wall surface, radiator with enhanced heat exchange structure is fixed at the air intake of engine by-pass air duct, becomes the main heat sink in motor oil cooling system.The shape that the present invention passes through change heat exchange pipeline, under the quality condition for reducing lubricating oil pressure loss in pipe, radiator to the greatest extent, increase in pipe, manage outer effective heat exchange area and increase the turbulivity of the inside and outside flowing of pipeline, inside pipe wall thermal resistance is effectively reduced, effectively improves the overall heat exchange ability of radiator.
Description
Technical field
The present invention relates to a kind of applied to the turbofan aircraft engine oil cooling of large and medium-sized bypass ratio, with enhanced heat exchange
The air of pipeline-lubricating oil face formula radiator belongs to sky-sliding surface formula radiator field in Aero-Engine Lubrication System.
Background technique
Blood of the lubricating oil as aero-engine not only provides sufficient lubrication for each moving component of aero-engine, and
Enough sealings, heat spreading function are also provided, thus when ensureing that aircraft engine is safe and stable long under the conditions of high-speed and high-temperature
Between cruising ability.The performance of oil system and the reliability of work are directly related to the working performance and reliability of engine.In
It working in the environment of high heat load, the temperature of lubricating oil also will be improved quickly, and the raising of temperature causes the viscosity of lubricating oil to become smaller, and
Be likely to occur chemical change sharply, coking phenomenon occur and directly result in engine can not work normally, thus must design with
The high efficiency and heat radiation system to match.
Oil cooler in current turbofan aero-engine is mainly fuel oil-cunning by the classification method of heat exchange medium
Oil radiator with two kinds of air-oil cooler, be generally mainly shell-and-tube heat exchanger for combustion-cunning radiator, for empty-cunning
Radiator generally uses face formula radiator, and kind heat exchanger is located at air intake duct section, and a part of air intake duct wall surface is handed over as heat
The heating surface of parallel operation, can make full use of aircraft space, and space occupied is small；Meanwhile as long as engine operation, there is heat radiation energy
Power is more suitable for lacking under ram-air, the working condition even without ram-air in ground shutdown, starting heats etc..
Traditional air-oil cooler is divided into two kinds of shell-and-tube radiator and face formula radiator.For face formula radiator,
It take oil pathway and fin arranged side by side as the main body of heat dissipation, but since the viscosity of lubricating oil is larger, lubricating oil side thermal resistance is larger,
Routinely carry out enhanced heat exchange only with increase fin, therefore the heat dissipation effect of empty sliding radiator is caused not protrude.
Summary of the invention
In view of the deficiencies of the prior art, it is cold to provide a kind of fanjet lubricating oil applied to large and medium-sized bypass ratio by the present invention
But, the air with enhanced heat exchange pipeline-lubricating oil annular radiator.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of air-lubricating oil face formula radiator, including oil cooler ontology, the oil cooler ontology include heat exchange
The outside wall surface of pipe, the heat exchanger tube is equipped with several axial keyways.
Further, the inner wall of the heat exchanger tube is equipped with rifling formula screw thread.
Further, the cross section of the axial keyway is semicircle.
Further, the axial keyway is circumferentially uniformly distributed in the outside wall surface of heat exchanger tube, and the number of axial keyway is 24
To 36.
Further, the twining for rifling formula screw thread is fixed away from d, and twining away from d is 1.5D3To 2.5D3, D3For in heat exchanger tube
Diameter.
Further, the cross sectional shape of the rifling formula screw thread is semicircle.
Further, the radius of the rifling formula screw thread isS is the wall thickness of heat exchanger tube.
Further, the heat exchanger tube forms the tube bank for transporting lubricating oil in the way of the row of pitching, adjacent three heat exchanger tubes with etc.
The shape of side triangle pitches row.
Further, the heat exchanger tube is annular.
Further, the radiator is set to engine by-pass air duct air inlet section, is bonded with by-pass air duct air inlet section wall surface.
The utility model has the advantages that the air with enhanced heat exchange pipeline-lubricating oil annular radiator proposed by the present invention, heat exchanger tube
Outside wall surface is equipped with axial keyway, and inner wall is equipped with rifling formula screw thread.The characteristics of such structure, is that inside and outside wall conduit is easy to process
(outer wall can be using milling, and inner wall can be with pulling pin).Outside wall surface axial slot can force the cooling working medium of incoming flow to turn to twist in advance, improve
Cooling effect.Inner wall using periodical rifling slot, allow internal flow fluid to generate cyclonic effect, not only in pipe
It increases the blending degree of oil product in pipe and extends oil product flow path, effective boundary for destroying oil product in pipe in pipe
Layer effectively enhances intraductal heat exchange, therefore comprehensively considers such result with comprehensive heat exchange property well.
The present invention is under the quality condition for reducing lubricating oil pressure loss in pipe, radiator to the greatest extent, and increase pipe is interior, pipe is outer effective
Heat exchange area and increase the inside and outside turbulivity flowed of pipeline, inside pipe wall thermal resistance be effectively reduced, effectively improve radiator
Overall heat exchange ability.
Detailed description of the invention
Attached drawing 1 is three dimensional structure diagram and partial schematic diagram of the invention；Fig. 2 is side view of the present invention；Fig. 3 is this hair
Bright cross-sectional view；Fig. 4 is enhanced heat exchange pipeline figure；Fig. 5 is heat exchanging pipe sectional view；Fig. 6 is the perspective view of pipe internal screw thread；1 in figure
Indicate oil cooler ontology, 2 rectangular fins, 3 heat exchanger tubes, 4 heat-exchanging tube bundles, 5 axial keyways, 6 rifling formula screw threads；
Fig. 7 indicate when heat exchanger tube outside wall surface axial bond slot number is 36 and smooth tube 5000,10000,20000,
30000,40000, the 50000 horizontal outside wall surfaces plunderred under six kinds of Reynolds numbers of air are averaged the comparison diagram of nusselt number；
Fig. 8 shows outside wall surface axial keyway numbers for the intensive conditions of heat transfer outside a tube；
Fig. 9,10 respectively indicate rifling formula screw thread twine away from heat exchanging overpressure loss and heat transfer effect influence.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
As shown in Figure 1, oil cooler ontology 1 includes the heat-exchanging tube bundle 4 being arranged in by several heat exchanger tubes 3, heat exchanger tube
The outer wall of beam 4 is equipped with rectangular fin 2.Heat-exchanging tube bundle 4 is annular.1 carry of oil cooler ontology is with abundant cold air
Entrance, specific carry is at by-pass air duct air inlet section.
The overall diameter of heat exchanger tube 3 is D0, internal diameter D3, wall thickness S, all there is apparent texture structure in pipe inside and outside wall, changing
It can be carried out high-intensitive heat exchange inside and outside heat pipe.The outside wall surface of heat exchanger tube 3 is equipped with the axial keyway 5 axially developed, inner wall
It twines equipped with fixation away from d (axial distance that lines is rotated by 360 °) rifling formula screw thread 6.
Preferably, in order to reduce the horizontal friction and collision loss for plunderring air, and difficulty of processing, 5 shape of axial keyway are reduced
Mill into semicircle, diameter D1, number n1, the angle between adjacent two axial keyway centers be α.In order to keep higher comprehensive
Heat exchange efficiency is closed, the preferred section α is 10 °~15 °, that is, corresponds to n1It is 24 to 36.
The cross sectional shape of rifling formula screw thread 6 is semicircle, diameter D2.Twining for rifling formula screw thread 6 will lead to stream away from d is too small
Flow resistance of the body in pipe is too big, and the excessive turbulivity for leading to the fluid in pipe is not big enough, and cyclonic effect is not obvious enough,
Therefore cause heat exchange side thermal resistance decline not obvious enough, twine away from d preferably in 1.5D3To 2.5D3.The depth of wire type screw thread 6Ying Bao
Card existsBetween, guarantee there can be enough disturbances in structure at wall, while also guaranteeing that there is biggish intensity, so that
Part excessively thin will not cause pipeline rupture.
Heat exchanger tube 3 forms the heat-exchanging tube bundle 4 for transporting lubricating oil in the way of the row of pitching, and adjacent three pipelines are with equilateral triangle
Shape fork row, tube spacing C.
The length of rectangular fin 2 is b, width a, and with a thickness of x, uniformly discrete rectangular fin 2 is next outside heat-exchanging tube bundle 4
Stream cold air has been separated out many local channels, and the local channel that fin is formed not only has local rectifying effect but also expands
Heat exchange area.
Fig. 7 indicate the enhanced heat exchange pipeline that outside wall surface keyway number is 36 and smooth tube 5000,10000,20000,
30000,40000,50,000 6 kind of horizontal outside wall surface face plunderred under Reynolds number is averaged the comparison diagram of nusselt number.Re 5000~
50000 heat exchange criterion formula isSeen by calculating data, due to the presence of outside wall surface keyway, so that
Outside wall surface heat exchange is effectively improved.Fig. 8 shows outside wall surface keyway numbers for the intensive conditions of heat transfer outside a tube, can by data
Know, outside wall surface keyway number is in n1It is most obvious for the improvement of heat transfer effect between=24~45 (α=8 °~15 °), and in height
In this section, the gain effect for heat exchange eases up.Fig. 9,10 respectively indicate the twining away to overpressure of rifling formula screw thread in pipe
Loss and the influence of heat transfer effect.Abscissa is twined away from numerical value, is 0 (inner wall smooth), D respectively3、2D3、3D3、4D3, indulge
Coordinate is pressure coefficient respectivelyFace is averaged nusselt numberP in formulaoutIt is outlet
Static pressure, PinIt is import static pressure, ρ is lubricating oil density, and ν fully developed section lubricating oil speed, Nu is local nusselt number, and A is area.By
It is found that rifling formula screw thread compares smooth pipeline, heat transfer effect is obviously improved but while also increasing along journey simulation calculation data
Loss, twines away from 1.5D3~2.5D3Between taken into account that heat exchange is extremely strong and the lesser feature of flow losses, therefore pipe interior conduit lines
It twines away from preferably in this section.
Claims (10)
1. a kind of air-lubricating oil face formula radiator, including oil cooler ontology, the oil cooler ontology includes heat exchange
Pipe, which is characterized in that the outside wall surface of the heat exchanger tube is equipped with several axial keyways.
2. a kind of air according to claim 1-lubricating oil face formula radiator, which is characterized in that the inner wall of the heat exchanger tube
Face is equipped with rifling formula screw thread.
3. a kind of air according to claim 1-lubricating oil face formula radiator, which is characterized in that the cross of the axial keyway
Section is semicircle.
4. a kind of air according to claim 1-lubricating oil face formula radiator, which is characterized in that the axial keyway is circumferential
It is uniformly distributed in the outside wall surface of heat exchanger tube, the number of axial keyway is 24 to 36.
5. a kind of air according to claim 2-lubricating oil face formula radiator, which is characterized in that the rifling formula screw thread
It twines and is fixed away from d, twining away from d is 1.5D3To 2.5D3, D3For the internal diameter of heat exchanger tube.
6. a kind of air according to claim 2-lubricating oil face formula radiator, which is characterized in that the rifling formula screw thread
Cross sectional shape is semicircle.
7. a kind of air according to claim 6-lubricating oil face formula radiator, which is characterized in that the rifling formula screw thread
Radius isS is the wall thickness of heat exchanger tube.
8. a kind of air according to claim 1-lubricating oil face formula radiator, which is characterized in that the heat exchanger tube is with the row of pitching
Mode form the tube bank for transporting lubricating oil, adjacent three heat exchanger tubes pitch row with the shape of equilateral triangle.
9. a kind of air according to claim 1-lubricating oil face formula radiator, which is characterized in that the heat exchanger tube is annular.
10. a kind of air according to claim 1-lubricating oil face formula radiator, which is characterized in that the radiator is set to
Engine by-pass air duct air inlet section is bonded with by-pass air duct air inlet section wall surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910617584.XA CN110425570A (en) | 2019-07-10 | 2019-07-10 | A kind of air-lubricating oil face formula radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910617584.XA CN110425570A (en) | 2019-07-10 | 2019-07-10 | A kind of air-lubricating oil face formula radiator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110425570A true CN110425570A (en) | 2019-11-08 |
Family
ID=68410417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910617584.XA Pending CN110425570A (en) | 2019-07-10 | 2019-07-10 | A kind of air-lubricating oil face formula radiator |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202403597U (en) * | 2012-01-16 | 2012-08-29 | 安吉恒盛热能机械有限公司 | Heat exchange pipe with spiral grooves |
| CN103362650A (en) * | 2012-04-01 | 2013-10-23 | 中航商用航空发动机有限责任公司 | Cooling system and method of aero-engine |
| US20160201563A1 (en) * | 2013-09-10 | 2016-07-14 | United Technologies Corporation | Fuel management system for a turbine engine |
| EP3081781A1 (en) * | 2015-04-13 | 2016-10-19 | United Technologies Corporation | Nose cone assembly and method of circulating air in a gas turbine engine |
| CN106643261A (en) * | 2015-10-30 | 2017-05-10 | 江阴市森博特种换热设备有限公司 | Reinforced heat exchange tube with diversion trenches |
| CN210717655U (en) * | 2019-07-10 | 2020-06-09 | 南京航空航天大学 | Air-lubricating oil surface type radiator |
-
2019
- 2019-07-10 CN CN201910617584.XA patent/CN110425570A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202403597U (en) * | 2012-01-16 | 2012-08-29 | 安吉恒盛热能机械有限公司 | Heat exchange pipe with spiral grooves |
| CN103362650A (en) * | 2012-04-01 | 2013-10-23 | 中航商用航空发动机有限责任公司 | Cooling system and method of aero-engine |
| US20160201563A1 (en) * | 2013-09-10 | 2016-07-14 | United Technologies Corporation | Fuel management system for a turbine engine |
| EP3081781A1 (en) * | 2015-04-13 | 2016-10-19 | United Technologies Corporation | Nose cone assembly and method of circulating air in a gas turbine engine |
| CN106643261A (en) * | 2015-10-30 | 2017-05-10 | 江阴市森博特种换热设备有限公司 | Reinforced heat exchange tube with diversion trenches |
| CN210717655U (en) * | 2019-07-10 | 2020-06-09 | 南京航空航天大学 | Air-lubricating oil surface type radiator |
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