CN107036483B - A kind of parallel cooling duct improving assignment of traffic uniformity - Google Patents
A kind of parallel cooling duct improving assignment of traffic uniformity Download PDFInfo
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- CN107036483B CN107036483B CN201710147305.9A CN201710147305A CN107036483B CN 107036483 B CN107036483 B CN 107036483B CN 201710147305 A CN201710147305 A CN 201710147305A CN 107036483 B CN107036483 B CN 107036483B
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- liquid collecting
- collecting cavity
- import
- cooling duct
- outlet
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- 238000001816 cooling Methods 0.000 title claims description 54
- 239000007788 liquid Substances 0.000 claims abstract description 100
- 230000008676 import Effects 0.000 claims abstract description 56
- 230000002146 bilateral effect Effects 0.000 claims abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 5
- 230000008646 thermal stress Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 230000004907 flux Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Duct Arrangements (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a kind of import liquid collecting cavity, including the closed ontology in inner cavity, ontology is projected in horizontal plane are as follows: front end is a straight line, and rear end is bilateral symmetry and ladder-like broken line from front to back；Distribution, which is moved towards, along it on the broken line of ontology rear end is provided with multiple liquid outlets；The upper surface front end of ontology is vertically arranged with inlet tube.The Flow Distribution Characteristics for improving channel tend to the Temperature Distribution of cooled region uniformly, to avoid the improvement assignment of traffic uniformity of the component failure as caused by thermal stress.
Description
Technical field
The invention belongs to technical field of heat exchangers, and in particular to a kind of to improve the parallel cooling logical of assignment of traffic uniformity
Road.
Background technique
The heat transfer efficiency of the Flow Distribution Characteristics exchange thermal of parallel channels has highly important influence, and in practical work
In Cheng Yingyong, with the increase of number of channels, the assignment of traffic inhomogeneities in each channel is consequently increased, and leads to the overall effect that exchanges heat
Rate reduces or even the reduction of respective channel flow causes localized hyperthermia to be transfinited, and causes the damage of heat-exchanger rig.It is designed in heat-exchanger rig
In the process, it is limited by relative position and device inlet and outlet quantity, the quantity of fluid inlet and outlet collector is generally colder than parallel
But it after number of channels wants much less, fluid to enter import liquid collecting cavity, is influenced by liquid collecting cavity shape and parallel branch pipe, along journey
There are a large amount of whirlpools in direction, and flow resistance increases, so that distal end branch pipe coolant flow is far smaller than the quality stream of proximal end branch pipe
Amount.
Parallel cooling duct layout type common at present has U-shaped, Z-type, I type, c-type etc., in the regeneration of airspace engine
It in cooling system, is laid out frequently with I type, assignment of traffic is distributed along import median plane in symmetric form, at inlet header
The flow-rate ratio distal end branch pipe of branch pipe is much greater.It is many about research evenly distributed in optimization heat exchanger channel, as document
《Diffusers-flow phenomena and design》(Department of mechanical engineering,
Stanford University, Stanford, Calif., 1978), it has studied in input port using baffle or orifice plate, can make
The assignment of traffic of heat exchanger entrance is more uniform, mentions for perforated plate, the aperture of center should be small, with from center
The increase of distance and be gradually increased orifice diameter.As patent " CN202792697U " devises a kind of scheme: input pipe sends stream
Body is introduced into fluid distribution pipe, then is ejected into the cavity that inlet collecting is communicated with flat tube by fluid injection aperture.It is logical
Crossing fluid distribution pipe can balance cold between distal end and proximal end flat tube simultaneously to distal end flat tube and proximal end flat tube injection fluid
Matchmaker's resistance improves the uniformity of the refrigerant distribution of distal end flat tube and proximal end flat tube, to improve the heat exchange of parallel-flow heat exchanger
Performance.Picture patent " CN101568792A " is provided with insertion piece in inlet header, which has multiple openings, for changing
It is apt to the Flow Distribution Characteristics in each channel.
Summary of the invention
Technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, provide one kind to improve channel
Flow Distribution Characteristics, tend to the Temperature Distribution of cooled region uniformly, to avoid the component failure as caused by thermal stress
Improvement assignment of traffic uniformity parallel cooling duct.
In order to solve the above technical problems, the technical solution adopted by the present invention is that,
The invention also discloses a kind of parallel cooling ducts for improving assignment of traffic uniformity, including above-mentioned import liquid collecting
Chamber group further includes exporting liquid collecting cavity group, inside the cavity wall for the outlet end that outlet liquid collecting cavity group is provided with cooling cavities, import liquid collecting
The import liquid collecting cavity of chamber group with outlet the outlet number of liquid collecting cavity of liquid collecting cavity group it is consistent, and corresponding import liquid collecting cavity out
It is connected between liquid mouth and the inlet for exporting liquid collecting cavity by multiple cooling ducts disposed in parallel.
The import liquid collecting cavity group includes the closed import liquid collecting cavity in above-mentioned multiple inner cavities；The left and right of multiple import liquid collecting cavities
Side is sequentially communicated, and is arranged and to be formed a ring bodies.Import liquid collecting cavity is projected in horizontal plane are as follows: front end is a straight line, and rear end is
Ladder-like broken line symmetrically and from front to back；On the broken line of import liquid collecting cavity rear end along its move towards distribution be provided with it is multiple
Liquid outlet；The upper surface front end of import liquid collecting cavity is vertically arranged with inlet tube.
Further, inside the cavity wall for the liquid feeding end which is provided with cavity to be cooled.
Further, the upper and lower surfaces of the import liquid collecting cavity are the smooth arc surface to raise upward, and inlet tube is located at
In the centre symmetry line of import liquid collecting cavity.
Further, which is set to inside the cavity wall of cavity to be cooled.
Further, multiple cooling ducts for being connected between an import liquid collecting cavity and one outlet liquid collecting cavity meet with
Lower condition: based on the width of cooling duct for being set to the centre symmetry line of import liquid collecting cavity, the cooling duct of two sides
Successively reduced relative to previous cooling duct with equal specific factors q, in which: q < 1.
Further, in a corresponding import liquid collecting cavity and one outlet liquid collecting cavity, the length of adjacent cooling duct
Differ X.
Further, the X=0.2mm.
Further, this each outlet liquid collecting cavity is opposite is vertically arranged with outlet tube, and the position of outlet tube with it is right
The position for the inlet tube answered is consistent.
A kind of parallel cooling duct for improving assignment of traffic uniformity of the present invention has the advantages that the stream for improving channel
Partition characteristic is measured, tends to the Temperature Distribution of cooled region uniformly, to avoid the component failure as caused by thermal stress.
Detailed description of the invention
Fig. 1 is the horizontal plane perspective view of liquid collecting cavity import liquid collecting cavity in the present invention；
Fig. 2 is a kind of structural schematic diagram for the parallel cooling duct for improving assignment of traffic uniformity of the present invention；
Fig. 3 is a kind of side view for the parallel cooling duct for improving assignment of traffic uniformity of the present invention；
Fig. 4 is a kind of B-B sectional view for the parallel cooling duct for improving assignment of traffic uniformity of the present invention；
Fig. 5 is the flow distribution curve changed after inlet and outlet liquid collecting cavity configuration in the present invention；
Fig. 6 is the flow distribution curve changed after all channel the ratio of width to height in the present invention；
Fig. 7 is the flow distribution curve after the ratio of width to height for changing channel 1~4 in the present invention；
Wherein: a. import liquid collecting cavity；1. cooling duct；2. ring bodies；3. inlet tube；4. outlet tube；5. exporting liquid collecting cavity.
Specific embodiment
A kind of import liquid collecting cavity of the present invention, as shown in Figure 1, including the closed import liquid collecting cavity a in inner cavity, import liquid collecting cavity a
It is projected in horizontal plane are as follows: front end is a straight line, and rear end is bilateral symmetry and ladder-like broken line from front to back；Import liquid collecting cavity a
Distribution, which is moved towards, along it on the broken line of rear end is provided with multiple liquid outlets；The upper surface front end of import liquid collecting cavity a be vertically arranged with into
Liquid pipe 3.Inside the cavity wall for the liquid feeding end that import liquid collecting cavity a is provided with cavity to be cooled.The upper and lower surfaces of import liquid collecting cavity a are equal
For the smooth arc surface to raise upward, and inlet tube 3 is located in the centre symmetry line of import liquid collecting cavity.
The invention discloses a kind of import liquid collecting cavity groups for improving assignment of traffic uniformity, as shown in Fig. 2, including above-mentioned
Multiple import liquid collecting cavity a；The left and right side of multiple import liquid collecting cavity a is sequentially communicated, and is arranged and to be formed a ring bodies 2.
The invention discloses a kind of parallel cooling ducts for improving assignment of traffic uniformity, as shown in Figure 2, Figure 3 and Figure 4,
It further include outlet liquid collecting cavity group 5 including above-mentioned import liquid collecting cavity group, outlet liquid collecting cavity group 5 is provided with the liquid out of cooling cavities
Inside the cavity wall at end, the import liquid collecting cavity of import liquid collecting cavity group is consistent with the outlet outlet number of liquid collecting cavity of liquid collecting cavity group,
And pass through multiple cooling ducts 1 disposed in parallel between the liquid outlet of corresponding import liquid collecting cavity and the inlet for exporting liquid collecting cavity
It is connected.Cooling duct 1 is set to inside the cavity wall of cavity to be cooled.Between one import liquid collecting cavity and one outlet liquid collecting cavity
Multiple cooling ducts 1 of connection meet the following conditions: the width to be set to the cooling duct 1 of the centre symmetry line of import liquid collecting cavity
Based on degree, the cooling duct 1 of two sides is successively reduced relative to previous cooling duct 1 with equal specific factors q, in which: q < 1.
In a corresponding import liquid collecting cavity and one outlet liquid collecting cavity, the length of adjacent cooling duct 1 differs X.X=0.2mm.It is each
A outlet liquid collecting cavity is opposite to be vertically arranged with outlet tube 4, and the position phase one of the position of outlet tube 4 and corresponding inlet tube 3
It causes.
A kind of parallel cooling duct for improving assignment of traffic uniformity of the present invention is suitable for airspace engine re-generatively cooled system
The mode of cooling duct I type layout in system, the sum of cooling duct 1 is determined according to actual condition.According to concrete application background
Mission requirements, it is known that available coolant mass flow m, by heat exchange amount acquire convection transfer rate in cooling duct,
Channel height/width/fin thickness/inner wall face thickness.It is soft in conjunction with finite element analysis after obtaining the geometric parameter of basic configuration
Part carries out numerical simulation, obtains the flux distribution characteristics of basic configuration, right in the present invention when calculating channel capacity distribution character
Compare the accuracy of k- ε Yu RSM turbulence model, it is found that the result of RSM model is more accurate, meanwhile, with the experiment knot in document
Fruit also coincide more preferable.By RSM turbulence model, numerical value is carried out to the cooling duct 1 of flowing and heat-transfer character uneven distribution
It researchs and analyses, determination need to change the number n of the cooling duct 1 of width, on the basis of centre symmetry line, to two sides number, every side
It is followed successively by 1,2,3,4 ....Equal specific factors q is smaller, is more obvious to the improvement of Flow Distribution Characteristics, but scale factor is deposited
In a threshold value, excessive scale factor can excessively reduce the flow of proximal end branch pipe, the flow of distal end branch pipe is caused to increased dramatically,
Therefore in specific implementation, scale factor needs are designed according to the configuration of concrete application, when scale factor is excessively big, meeting
Cause distal channel flow to be significantly greater than proximal channel, causes " reverse uneven distribution ".Determining liquid collecting cavity interchannel rib
When being retracted difference X, when comparing heterogeneous coefficient distribution and the X=0.2mm of the application of basic configuration, the improved ratio of flow distribution
Example determines X value when concrete application is implemented.It can be obtained by Fig. 5 and Fig. 6, the change of channel cross-sectional area influences flux distribution characteristics
Significantly.Also, the sectional area for changing the part cooling duct 1 of inlet two sides, that is, can reach preferable effect.
In the present invention, following scheme is devised, it, can be according to scheme 9 in the re-generatively cooled system of airspace engine
Mode selects suitable X, and length between each cooling duct between entrance liquid collecting cavity is differed a same length X, is made
Passage length successively decreases in arithmetic progression, and the parallel channels between entrance liquid collecting cavity are in " convex " font arrangement.Simultaneously according to tool
Body channel size, the scale factor q of selector channel sectional area make flux distribution characteristics keep with hot wall side heat flux distribution characteristic
Gesture is consistent, constitutes the cooling duct 1 of a novel improvement assignment of traffic uniformity.It is ground by carrying out numerical value to cooling duct 1
Study carefully, shows that the utility model can improve the distributing uniformity of flow well, the improvement assignment of traffic in the design present invention
When the parallel cooling duct 1 of uniformity, current parallel cooling duct is used as basic configuration, and benchmark as a comparison, respectively
The parameter that the improved parallel cooling duct of component cooling duct parallel with basic configuration changes is as shown in table 1:
The geometric parameter of table 1 datum configuration and each improved model
As shown in figure 5, to change the flow distribution curve after inlet and outlet liquid collecting cavity configuration, as seen from the figure, with outlet liquid collecting
Chamber is compared, and influence of the import liquid collecting cavity for Flow Distribution Characteristics is more significant, meanwhile, using the import liquid collecting cavity in the present invention
Obtain more uniform Flow Distribution Characteristics.
As shown in fig. 6, as seen from the figure, channel width height compares to change the flow distribution curve after all channel the ratio of width to height
The influence of Flow Distribution Characteristics is very significant, and scale factor facilitates to improve the Flow Distribution Characteristics of I type parallel channels less than 1,
But scale factor need to select with caution, otherwise can cause reverse uneven distribution.
As shown in fig. 7, to change the flow distribution curve after the ratio of width to height in channel 1~4；As seen from the figure, only change non-equal
The ratio of width to height in channel 1~4 of the even coefficient greater than 1.0, can improve channel integral dispensing characteristic, in turn avoid reverse uneven point
Cloth obtains relatively uniform Flow Distribution Characteristics.
Claims (4)
1. a kind of parallel cooling duct for improving assignment of traffic uniformity, which is characterized in that including import liquid collecting cavity group, further include
It exports liquid collecting cavity group (5), inside the cavity wall for the outlet end that outlet liquid collecting cavity group (5) is provided with cooling cavities, the import
The import liquid collecting cavity (a) of liquid collecting cavity group is consistent with the outlet outlet number of liquid collecting cavity of liquid collecting cavity group (5), and corresponding described
It is connected between the liquid outlet of import liquid collecting cavity and the inlet for exporting liquid collecting cavity by multiple cooling ducts (1) disposed in parallel
It is logical；
The cooling duct (1) is set to inside the cavity wall of cavity to be cooled；
The multiple cooling ducts (1) being connected between one import liquid collecting cavity and one outlet liquid collecting cavity meet the following conditions: to set
It is placed in based on the width of cooling duct (1) of the centre symmetry line of import liquid collecting cavity, the cooling duct (1) of two sides is successively
Reduced relative to previous cooling duct (1) with equal specific factors q, in which: q < 1；
The import liquid collecting cavity group includes the closed import liquid collecting cavity (a) in multiple inner cavities, a left side for multiple import liquid collecting cavities (a)
Right-hand end is sequentially communicated, and is arranged and to be formed a ring bodies (2)；
The import liquid collecting cavity (a) projects in horizontal plane are as follows: front end is a straight line, and rear end is bilateral symmetry and from front to back
Ladder-like broken line；Distribution, which is moved towards, along it on the broken line of import liquid collecting cavity (a) rear end is provided with multiple liquid outlets；The import
The upper surface front end of liquid collecting cavity (a) is vertically arranged with inlet tube (3)；
The import liquid collecting cavity (a) is provided with inside the cavity wall of the liquid feeding end of cavity to be cooled；
The upper and lower surfaces of the import liquid collecting cavity (a) are the smooth arc surface to raise upward, and inlet tube (3) is located at import
In the centre symmetry line of liquid collecting cavity.
2. a kind of parallel cooling duct for improving assignment of traffic uniformity described in accordance with the claim 1, which is characterized in that corresponding
An import liquid collecting cavity (a) and one outlet liquid collecting cavity in, the length of the adjacent cooling duct (1) differs X.
3. a kind of parallel cooling duct for improving assignment of traffic uniformity according to claim 2, which is characterized in that described
X=0.2mm.
4. a kind of parallel cooling duct for improving assignment of traffic uniformity described in accordance with the claim 3, which is characterized in that each
A outlet liquid collecting cavity is opposite to be vertically arranged with outlet tube (4), and the position of the outlet tube (4) and corresponding inlet tube
(3) position is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710147305.9A CN107036483B (en) | 2017-03-13 | 2017-03-13 | A kind of parallel cooling duct improving assignment of traffic uniformity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710147305.9A CN107036483B (en) | 2017-03-13 | 2017-03-13 | A kind of parallel cooling duct improving assignment of traffic uniformity |
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| Publication Number | Publication Date |
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| CN107036483A CN107036483A (en) | 2017-08-11 |
| CN107036483B true CN107036483B (en) | 2019-06-07 |
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| CN107558386B (en) * | 2017-09-07 | 2018-11-30 | 河海大学 | A method of improving City Pumping Station oblique inflow box culvert assignment of traffic uniformity |
| CN108571911B (en) * | 2018-03-14 | 2019-06-07 | 西北工业大学 | Parallel port with adaptive structure |
| US11568098B2 (en) * | 2018-05-16 | 2023-01-31 | Autodesk, Inc | Designing convective cooling channels |
| CN111907721A (en) * | 2020-08-18 | 2020-11-10 | 西北工业大学 | Sleeve passage for cooling high-temperature part of aircraft |
| CN112197635A (en) * | 2020-09-09 | 2021-01-08 | 上海交通大学 | Light low flow resistance low-temperature steam cooling screen |
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| US6068730A (en) * | 1995-08-22 | 2000-05-30 | Hadwaco Ltd Oy | Liquid distributor for evaporator |
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| CN102413916A (en) * | 2009-04-29 | 2012-04-11 | 卡萨尔甲醛公司 | Isothermal tube reactor |
| CN203533991U (en) * | 2013-07-15 | 2014-04-09 | 重庆美的通用制冷设备有限公司 | Flooded type evaporator and jet type refrigerant distributor thereof |
| CN104913677A (en) * | 2014-03-12 | 2015-09-16 | 董永斌 | Guide plate distributing method for shell side medium inlet of circular block graphite heat exchanger |
| CN105289349A (en) * | 2015-10-30 | 2016-02-03 | 西安交通大学 | Axial stretchable stepped combined type Venturi mixer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS613999A (en) * | 1984-06-19 | 1986-01-09 | Mitsubishi Heavy Ind Ltd | Shell and tube type heat exchanger |
| EP1306126A1 (en) * | 2001-10-19 | 2003-05-02 | Methanol Casale S.A. | Heat exchange unit for isothermal chemical reactors |
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2017
- 2017-03-13 CN CN201710147305.9A patent/CN107036483B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6068730A (en) * | 1995-08-22 | 2000-05-30 | Hadwaco Ltd Oy | Liquid distributor for evaporator |
| CN1816387A (en) * | 2004-02-12 | 2006-08-09 | 卡萨尔甲醇公司 | Pseudo-isothermal chemical reactor for heterogenous chemical reactions |
| CN102413916A (en) * | 2009-04-29 | 2012-04-11 | 卡萨尔甲醛公司 | Isothermal tube reactor |
| CN203533991U (en) * | 2013-07-15 | 2014-04-09 | 重庆美的通用制冷设备有限公司 | Flooded type evaporator and jet type refrigerant distributor thereof |
| CN104913677A (en) * | 2014-03-12 | 2015-09-16 | 董永斌 | Guide plate distributing method for shell side medium inlet of circular block graphite heat exchanger |
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