CN107036483A - It is a kind of to improve the parallel cooling duct of assignment of traffic uniformity - Google Patents
It is a kind of to improve the parallel cooling duct of assignment of traffic uniformity Download PDFInfo
- Publication number
- CN107036483A CN107036483A CN201710147305.9A CN201710147305A CN107036483A CN 107036483 A CN107036483 A CN 107036483A CN 201710147305 A CN201710147305 A CN 201710147305A CN 107036483 A CN107036483 A CN 107036483A
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- China
- Prior art keywords
- liquid collecting
- collecting cavity
- cooling duct
- assignment
- import
- 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.)
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Links
- 238000001816 cooling Methods 0.000 title claims description 57
- 239000007788 liquid Substances 0.000 claims abstract description 71
- 230000008676 import Effects 0.000 claims abstract description 31
- 230000006872 improvement Effects 0.000 claims abstract description 11
- 230000008646 thermal stress Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 9
- 239000012530 fluid Substances 0.000 description 6
- 230000004907 flux Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 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
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 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
- 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, include the body of inner chamber closing, body is projected as in horizontal plane：Front end is a straight line, and rear end is stepped broken line symmetrical and from front to back；Distribution is moved towards along it be provided with multiple liquid outlets on the broken line of body rear end；The upper surface front end of body is vertically arranged with feed tube.The Flow Distribution Characteristics of passage are improved, making the Temperature Distribution of cooled region tends to be uniform, so as to avoid due to the improvement assignment of traffic uniformity of component failure caused by thermal stress.
Description
Technical field
The invention belongs to technical field of heat exchangers, and in particular to a kind of parallel cooling of improvement assignment of traffic uniformity is led to
Road.
Background technology
The heat transfer efficiency of the Flow Distribution Characteristics exchange thermal of parallel channels has highly important influence, and in actual work
In Cheng Yingyong, with the increase of number of channels, the assignment of traffic inhomogeneities of each passage is consequently increased, and causes overall heat exchange effect
Rate is reduced, or even the reduction of respective channel flow causes localized hyperthermia to be transfinited, and causes the damage of heat-exchanger rig.In heat-exchanger rig design
During, imported and exported quantity by relative position and device and limited, the quantity of fluid inlet and outlet collector is general colder than parallel
But number of channels wants much less, and fluid enters after import liquid collecting cavity, influenceed by liquid collecting cavity shape and parallel branch pipe, along journey
There are a large amount of whirlpools, flow resistance increase so that distal end branch pipe coolant flow is far smaller than the quality stream of near-end branch pipe in direction
Amount.
Parallel cooling duct layout type common at present has U-shaped, Z-type, I types, c-type etc., in the regeneration of airspace engine
In cooling system, it is laid out frequently with I types, its 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.On research evenly distributed in optimization heat exchanger channel a lot, as document
《Diffusers-flow phenomena and design》(Department of mechanical engineering,
Stanford University, Stanford, Calif., 1978), it have studied and baffle plate or orifice plate are used in input port, can make
Assignment of traffic at heat exchanger import is more uniform, mentions for perforated plate, and the aperture of its center should be small, with from center
The increase of distance and gradually increase orifice diameter.As patent《CN202792697U》Devise a kind of scheme：Input pipe sends stream
Body is introduced into fluid distribution pipe, then in fluid injection aperture is ejected into the cavity that inlet collecting is communicated with flat tube.It leads to
Fluid can be sprayed to distal end flat tube and near-end flat tube simultaneously by crossing fluid distribution pipe, be balanced cold between distal end and near-end flat tube
Matchmaker's resistance, improves distal end flat tube and the uniformity of the refrigerant distribution of near-end flat tube, so as to improve the heat exchange of parallel-flow heat exchanger
Performance.As patent《CN101568792A》Insert is provided with inlet header, the insert has multiple openings, for changing
It is apt to the Flow Distribution Characteristics of each passage.
The content of the invention
The technical problems to be solved by the invention are to improve passage there is provided one kind for above-mentioned the deficiencies in the prior art
Flow Distribution Characteristics, making the Temperature Distribution of cooled region tends to be uniform, so as to avoid due to component failure 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, a kind of import liquid collecting cavity, including inner chamber closing
Body, body is projected as in horizontal plane：Front end is a straight line, and rear end is stepped broken line symmetrical and from front to back；
Distribution is moved towards along it be provided with multiple liquid outlets on the broken line of body rear end；The upper surface front end of body is vertically arranged with feed liquor
Pipe.
Further, the body is opened in inside the cavity wall of the liquid feeding end of cavity to be cooled.
Further, the upper and lower surface of the body is the smooth arc surface raised up, and feed tube is located at body
In centre symmetry line.
Improve the import liquid collecting cavity group of assignment of traffic uniformity, including above-mentioned multiple the invention also discloses a kind of
Body；The left and right side of multiple bodies is sequentially communicated, and the ring bodies of arrangement form one.
Improve the parallel cooling duct of assignment of traffic uniformity, including above-mentioned import liquid collecting the invention also discloses a kind of
Chamber group, in addition to outlet liquid collecting cavity group, outlet liquid collecting cavity group are opened in inside the cavity wall of the outlet end of cooling cavities, import liquid collecting
Chamber is consistent with the number for exporting liquid collecting cavity, and between the liquid outlet of corresponding import liquid collecting cavity and the inlet of outlet liquid collecting cavity
It is connected by multiple cooling ducts be arrangeding in parallel.
Further, the cooling duct is arranged 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 the cooling duct for the centre symmetry line for being arranged at import liquid collecting cavity, the cooling duct of its both sides
Successively relative to previous cooling duct to wait specific factor q to reduce, wherein：q<1.
Further, in corresponding an 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 relative is vertically arranged with drain pipe, and the position of drain pipe with it is right
The position for the feed tube answered is consistent.
A kind of parallel cooling duct for improving assignment of traffic uniformity of the present invention has the following advantages that：Improve the stream of passage
Partition characteristic is measured, making the Temperature Distribution of cooled region tends to be uniform, so as to avoid due to component failure caused by thermal stress.
Brief description of the drawings
Fig. 1 is the horizontal plane perspective view of liquid collecting cavity body in the present invention；
Fig. 2 is a kind of structural representation 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 profiles for the parallel cooling duct for improving assignment of traffic uniformity of the present invention；
Fig. 5 is to change the flow distribution curve imported and exported after liquid collecting cavity configuration in the present invention；
Fig. 6 is to change the flow distribution curve after all passage the ratio of width to height in the present invention；
Fig. 7 is the flow distribution curve after the ratio of width to height of change passage 1~4 in the present invention；
Wherein：A. body；1. cooling duct；2. ring bodies；3. feed tube；4. drain pipe；5. export liquid collecting cavity.
Embodiment
A kind of import liquid collecting cavity of the present invention, as shown in figure 1, the body a closed including inner chamber, body a are projected in horizontal plane
For：Front end is a straight line, and rear end is stepped broken line symmetrical and from front to back；Walked on the broken line of body a rear ends along it
Distribution is provided with multiple liquid outlets；Body a upper surface front end is vertically arranged with feed tube 3.Body a is opened in chamber to be cooled
Inside the cavity wall of the liquid feeding end of body.Body a upper and lower surface is the smooth arc surface raised up, and feed tube 3 is located at this
In the centre symmetry line of body.
Improve the import liquid collecting cavity group of assignment of traffic uniformity the invention discloses a kind of, as shown in Fig. 2 including above-mentioned
Multiple body a；Multiple body a left and right side is sequentially communicated, and the ring bodies 2 of arrangement form one.
Improve the parallel cooling duct of assignment of traffic uniformity the invention discloses a kind of, as shown in Figure 2, Figure 3 and Figure 4,
Including above-mentioned import liquid collecting cavity group, in addition to outlet liquid collecting cavity group 5, what outlet liquid collecting cavity group 5 was opened in cooling cavities goes out liquid
Inside the cavity wall at end, import liquid collecting cavity with export liquid collecting cavity number it is consistent, and the liquid outlet of corresponding import liquid collecting cavity and
It is connected between the inlet for exporting liquid collecting cavity by multiple cooling ducts 1 be arrangeding in parallel.Cooling duct 1 is arranged to be cooled
Inside the cavity wall of cavity.The multiple cooling ducts 1 connected between one import liquid collecting cavity and one outlet liquid collecting cavity meet following
Condition：Based on the width of the cooling duct 1 for the centre symmetry line for being arranged at import liquid collecting cavity, the cooling duct 1 of its both sides
Successively relative to previous cooling duct 1 to wait specific factor q to reduce, wherein：q<1.A corresponding import liquid collecting cavity and one
Export in liquid collecting cavity, the length difference X of adjacent cooling duct 1.X=0.2mm.Each outlet liquid collecting cavity is relative to be vertically arranged
There is drain pipe 4, and the position of drain pipe 4 is consistent with the position of corresponding feed tube 4.
A kind of parallel cooling duct for improving assignment of traffic uniformity of the present invention is applied to airspace engine re-generatively cooled system
The mode of cooling duct I types 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 try to achieve convection transfer rate in cooling duct,
Channel height/width/fin thickness/inwall face thickness.It is soft with reference to finite element analysis after the geometric parameter for obtaining basic configuration
Part carries out numerical simulation, obtains the flux distribution characteristics of basic configuration, when calculating channel capacity distribution character, right in the present invention
Compare k- ε and RSM the turbulence models degree of accuracy, it is found that the result of RSM models is more accurate, meanwhile, with the experiment knot in document
It is more preferable that fruit also coincide.By RSM turbulence models, numerical value is carried out to the cooling duct 1 of flowing and heat-transfer character uneven distribution
Research and analyse, it is determined that the number n of the cooling duct 1 of width need to be changed, on the basis of centre symmetry line, to both sides number, per side
It is followed successively by 1,2,3,4 ....Smaller Deng specific factor q, the improvement to Flow Distribution Characteristics is more obvious, but scale factor is deposited
In a threshold value, excessive scale factor can excessively reduce the flow of near-end branch pipe, cause the flow of distal end branch pipe increased dramatically,
Therefore in specific implementation, scale factor needs to be designed according to the configuration of concrete application, when scale factor is excessively big, meeting
Cause distal channel flow significantly greater than proximal channel, cause " reverse uneven distribution ".It is determined that liquid collecting cavity interchannel rib
When being retracted difference X, when the heterogeneous coefficient of contrast basic configuration is distributed the X=0.2mm with the application, the improved ratio of flow distribution
Example, determines X values when concrete application is implemented.It can be obtained by Fig. 5 and Fig. 6, the change of channel cross-sectional area influences on flux distribution characteristics
Significantly.Also, change the sectional area of the part cooling duct 1 of inlet both sides, you can reach preferable effect.
In the present invention, following scheme is devised, 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 into a same length X, 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 makes flux distribution characteristics keep with hot wall side heat flux distribution characteristic
Gesture is consistent, constitutes the cooling duct 1 of a new improvement assignment of traffic uniformity.Ground by carrying out numerical value to cooling duct 1
Study carefully, show that the present invention can improve the distributing uniformity of flow well, the improvement assignment of traffic in the design present invention is uniform
Property parallel cooling duct 1 when, it is basic configuration with parallel cooling duct to employ existing, and benchmark as a comparison, each component
The parameter that improved parallel cooling duct cooling duct parallel with basic configuration changes is as shown in table 1：
The geometric parameter of the datum configuration of table 1 and each improved model
As shown in figure 5, the flow distribution curve after liquid collecting cavity configuration is imported and exported to change, as seen from the figure, with outlet liquid collecting
Chamber is compared, and import liquid collecting cavity is more notable for the influence of Flow Distribution Characteristics, meanwhile, using the import liquid collecting cavity in the present invention
Obtain more uniform Flow Distribution Characteristics.
As shown in fig. 6, to change the flow distribution curve after all passage the ratio of width to height, as seen from the figure, channel width height is compared
The influence of Flow Distribution Characteristics is very notable, and scale factor, which is less than 1, to be helped to improve the Flow Distribution Characteristics of I type parallel channels,
But scale factor need to be selected with caution, reverse uneven distribution otherwise can be caused..
As shown in fig. 7, being the flow distribution curve after the ratio of width to height of change passage 1~4；As seen from the figure, only change non-equal
Even coefficient is more than the ratio of width to height of 1.0 passage 1~4, can improve passage integral dispensing characteristic, turn avoid reverse uneven point
Cloth, obtains relatively uniform Flow Distribution Characteristics.
Claims (10)
1. a kind of import liquid collecting cavity, it is characterised in that the body (a) closed including inner chamber, the body (a) projects in horizontal plane
For：Front end is a straight line, and rear end is stepped broken line symmetrical and from front to back；On the broken line of body (a) rear end
Distribution, which is moved towards, along it is provided with multiple liquid outlets；The upper surface front end of the body (a) is vertically arranged with feed tube (3).
2. according to a kind of import liquid collecting cavity described in claim 1, it is characterised in that the body (a) is opened in chamber to be cooled
Inside the cavity wall of the liquid feeding end of body.
3. according to a kind of import liquid collecting cavity described in claim 2, it is characterised in that the upper and lower surface of the body (a) is
The smooth arc surface raised up, and feed tube (3) is in the centre symmetry line of body.
4. a kind of improve the import liquid collecting cavity group of assignment of traffic uniformity, it is characterised in that including any one of claim 1-3
Described multiple bodies (a)；The left and right side of the multiple body (a) is sequentially communicated, and the ring bodies of arrangement form one (2).
5. a kind of improve the parallel cooling duct of assignment of traffic uniformity, it is characterised in that including entering described in claim 4
Mouth liquid collecting cavity group, in addition to outlet liquid collecting cavity group (5), the outlet liquid collecting cavity group (5) are opened in the outlet end of cooling cavities
Inside cavity wall, the import liquid collecting cavity is consistent with the number for exporting liquid collecting cavity, and the corresponding import liquid collecting cavity goes out liquid
It is connected between mouth and the inlet of outlet liquid collecting cavity by multiple cooling ducts (1) be arrangeding in parallel.
6. according to a kind of parallel cooling duct of improvement assignment of traffic uniformity described in claim 5, it is characterised in that described
Cooling duct (1) is arranged inside the cavity wall of cavity to be cooled.
7. according to a kind of parallel cooling duct of improvement assignment of traffic uniformity described in claim 6, it is characterised in that one
The multiple cooling ducts (1) connected between import liquid collecting cavity and one outlet liquid collecting cavity meet following condition：To be arranged at import
Based on the width of the cooling duct (1) of the centre symmetry line of liquid collecting cavity, the cooling duct (1) of its both sides is successively relative to preceding
One cooling duct (1) is reduced with grade specific factor q, wherein：q<1.
8. according to a kind of parallel cooling duct of improvement assignment of traffic uniformity described in claim 7, it is characterised in that correspondence
An import liquid collecting cavity and one outlet liquid collecting cavity in, the length of the adjacent cooling duct (1) difference X.
9. according to a kind of parallel cooling duct of improvement assignment of traffic uniformity described in claim 8, it is characterised in that described
X=0.2mm.
10. according to a kind of parallel cooling duct of improvement assignment of traffic uniformity described in claim 9, it is characterised in that every
One outlet liquid collecting cavity is relative to be vertically arranged with drain pipe (4), and position and the corresponding feed liquor of the drain pipe (4)
The position for managing (4) 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107036483A true CN107036483A (en) | 2017-08-11 |
| CN107036483B CN107036483B (en) | 2019-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710147305.9A Expired - Fee Related CN107036483B (en) | 2017-03-13 | 2017-03-13 | A kind of parallel cooling duct improving assignment of traffic uniformity |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107558386A (en) * | 2017-09-07 | 2018-01-09 | 河海大学 | A kind of method for improving City Pumping Station oblique inflow box culvert assignment of traffic uniformity |
| CN108571911A (en) * | 2018-03-14 | 2018-09-25 | 西北工业大学 | Parallel port with adaptive structure |
| 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 |
| US11568098B2 (en) * | 2018-05-16 | 2023-01-31 | Autodesk, Inc | Designing convective cooling channels |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS613999A (en) * | 1984-06-19 | 1986-01-09 | Mitsubishi Heavy Ind Ltd | Shell and tube type heat exchanger |
| US6068730A (en) * | 1995-08-22 | 2000-05-30 | Hadwaco Ltd Oy | Liquid distributor for evaporator |
| US20050061490A1 (en) * | 2001-10-19 | 2005-03-24 | Ermanno Filippi | Heat exchange unit for isothermal chemical reactors |
| 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 |
| CN105289349A (en) * | 2015-10-30 | 2016-02-03 | 西安交通大学 | Axial stretchable stepped combined type Venturi mixer |
-
2017
- 2017-03-13 CN CN201710147305.9A patent/CN107036483B/en not_active Expired - Fee Related
Patent Citations (8)
| 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 |
| US6068730A (en) * | 1995-08-22 | 2000-05-30 | Hadwaco Ltd Oy | Liquid distributor for evaporator |
| US20050061490A1 (en) * | 2001-10-19 | 2005-03-24 | Ermanno Filippi | Heat exchange unit for isothermal chemical reactors |
| 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 |
| CN105289349A (en) * | 2015-10-30 | 2016-02-03 | 西安交通大学 | Axial stretchable stepped combined type Venturi mixer |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107558386A (en) * | 2017-09-07 | 2018-01-09 | 河海大学 | A kind of method for improving City Pumping Station oblique inflow box culvert assignment of traffic uniformity |
| 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 |
| CN108571911A (en) * | 2018-03-14 | 2018-09-25 | 西北工业大学 | Parallel port with adaptive structure |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107036483B (en) | 2019-06-07 |
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Granted publication date: 20190607 |