CN107131776A - Double helix tubular type gas-gas heat exchanger in a kind of circular passage - Google Patents
Double helix tubular type gas-gas heat exchanger in a kind of circular passage Download PDFInfo
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- CN107131776A CN107131776A CN201710399636.1A CN201710399636A CN107131776A CN 107131776 A CN107131776 A CN 107131776A CN 201710399636 A CN201710399636 A CN 201710399636A CN 107131776 A CN107131776 A CN 107131776A
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- Prior art keywords
- heat exchanger
- collection chamber
- heat exchange
- circular passage
- gas
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- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
- F28D7/024—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Double helix tubular type gas-gas heat exchanger in a kind of circular passage, is related to gas-gas heat exchanger field, including some heat exchange units being circumferentially uniformly arranged on along circular passage in circular passage；Cold airflow is axially movable in circulating line, the thermal current that described heat exchange unit includes flowing to arrangement along cold airflow respectively flows into collection chamber and thermal current outflow collection chamber, and two ends flow into some screw type heat exchanger tubes that collection chamber and thermal current outflow collection chamber are connected with thermal current respectively；Screw type heat exchanger tube forms heat-exchanging tube bundle including along circular passage being in radially the outer layer spiral heat exchange tube and internal layer spiral heat exchange tube of gap setting, and being arranged in order distribution along cold airflow flow direction respectively；Thermal current flows into the entrance of collection chamber and the outlet of thermal current outflow collection chamber is located at same one end of heat exchange unit, and both passes through inwall or the outer wall setting of circular passage, and the other end of heat exchange unit is free end.
Description
Technical field
The present invention relates to gas-to-gas heat exchanger field, double helix tubular type gas-to-gas heat exchanger in specially a kind of circular passage.
Background technology
Air channel is widely present in each engineering field, such as Aeronautics and Astronautics, ship, vehicle, nuclear technology field.For each
Individual different field, air channel has different forms, and relatively common having is square, circular, annular.For some complicated tip necks
Domain, such as pre- cold engine by-pass air duct in empty day, air velocity often reach transonic speed or supersonic speed, at this moment, the heat transfer of heat exchanger
Design and structure design must simultaneously meet the requirement of aerodynamic quality and thermal performance.Annular passage is common in aeroplane engine
The pre- cold engine by-pass air duct of machine and empty day, at this moment, heat exchanger is in addition to it need to meet flowing and drag characteristic, it is necessary to possess high temperature resistant
High pressure resistant the features such as.Gas-to-gas heat exchanger for annular passage has coil heat exchanger, plate-fin heat exchanger and original surface heat exchange
Device.Long flow path in coil heat exchanger pipe, runner number is few, and flow resistance is high in pipe, and thermal stress distribution is uneven, and heat transfer effect is poor.
Compact conformation for plate-fin heat exchanger compares coil heat exchanger with primary surface heat exchanger, but resistance to pressure and thermal expansion adaptivity
Difference, poor sealing, Applicable temperature and pressure limit are limited.
The content of the invention
For problems of the prior art, the present invention provides a kind of low flow resistance, height heat exchange, the good circular passage of resistance to pressure
Interior double helix tubular type gas-to-gas heat exchanger.
The present invention is to be achieved through the following technical solutions：
Double helix tubular type gas-to-gas heat exchanger in a kind of circular passage, including some be circumferentially uniformly arranged on along circular passage
Heat exchange unit in circular passage；
Axially movable, described heat exchange unit includes flowing to the heat of arrangement along cold airflow respectively cold airflow in circulating line
Air-flow flows into collection chamber and thermal current outflow collection chamber, and two ends flow into collection chamber with thermal current respectively and thermal current outflow collects
Some screw type heat exchanger tubes of air chamber connection；
Screw type heat exchanger tube includes changing along the outer layer spiral heat exchange tube and interior helical layer that circular passage is radially set in gap
Heat pipe, and be arranged in order distribution along cold airflow flow direction respectively and form heat-exchanging tube bundle；
Thermal current flows into the entrance of collection chamber and the outlet of thermal current outflow collection chamber is located at same one end of heat exchange unit, and
Inwall or outer wall through circular passage are set, and the other end of heat exchange unit is free end.
It is preferred that, outer layer spiral heat exchange tube and internal layer spiral heat exchange tube distinguish curved set in windward side.
It is preferred that, the inwall or outer wall of heat exchange unit free end and adjacent circular passage are set in gap.
It is preferred that, heat-exchanging tube bundle is set in radially being arranged in double-layer spiral for circular passage.
It is preferred that, thermal current, which flows into collection chamber and thermal current outflow collection chamber, has identical structure；
Each collection chamber includes two air collecting chambers, and two air collecting chambers that thermal current flows into collection chamber are changed with outer helical layer respectively
Heat pipe is connected with the entrance of internal layer spiral heat exchange tube, and two air collecting chambers of thermal current outflow collection chamber exchange heat with outer helical layer respectively
The outlet of pipe and internal layer spiral heat exchange tube；
Each collection chamber center is provided with center hole and central recess；Central recess is flowed to along cold airflow and set.
It is preferred that, the pipe external diameter of screw type heat exchanger tube is 2mm~4mm.
It is preferred that, the bore of screw type heat exchanger tube is 1.4mm~3.4mm.
It is preferred that, screw type heat exchanger tube uses minimum tolerable temperature for 500 DEG C, and minimum proof pressure closes for 3MPa nickel chromium triangle
Golden pipe is made.Compared with prior art, the present invention has following beneficial technique effect：
The present invention is assembled into heat exchange beam using some screw type heat exchanger tubes, and screw type heat exchanger tube is radially arranged along circular passage
For outer interior two layers, for normal spiral pipe heat exchanger, collection chamber sets more simplified, and local flow drag losses is more
It is low；Heat exchanger collection chamber is highly relatively low, and middle part is fluted, reduces the drag losses that gas collection part is brought to air channel, center
The setting of circular hole can also be used for stationary heat exchangers in some cases to reduce heat exchanger unit quality；Screw type heat exchanger tube
Compared to having higher intraductal heat exchange coefficient for snakelike heat exchange tube, while thermal stress distribution is more uniformly distributed, so as to ensure that
Heat transmission equipment is used under high-temperature and high-pressure conditions security and durability；4mm thin heat exchanger tube is no more than using caliber, one can be entered
The compactness of step increase heat exchanger, while reducing pipe external resistance；The heat exchange of tubular type is set to exchange heat compared to plate-fin and original surface formula
For device, with more preferable resistance to pressure and sealing, under the high temperature conditions, pipe heat exchanger also has good thermal expansion adaptive
Ying Xing, durability when being used this guarantees heat exchanger under high-temperature and high-pressure conditions；It can be adjusted according to different heat exchange demands
The quantity of heat exchanger tube, wide adaptation range in the quantity of heat exchange unit, and tube bank.
Further, heat exchanger tube is curved is set, can be according to the total heat exchange area of unit by the adjustment to crooked radian
Different change heat exchanger tube lengths.When required unit heat exchanger area is larger, increase crooked radian increases heat exchange pipe range simultaneously
Degree；When required unit heat exchange area is smaller, reduces crooked radian and reduce heat exchanger tube length simultaneously.
Further, the gap of heat exchange unit free end, which is set, makes it possess good thermal expansion adaptivity.Heat exchanger is certainly
It is hot fluid outlet ports collection chamber and neighbouring connecting portion by end.When the temperature increases, heat exchanger tube increases due to thermal expansivity.For
Ensure that heat exchange unit has enough free end spaceses, can suitably increase heat exchanger tube crooked radian.
Further, central recess and center hole are provided with the middle part of collection chamber, can further reduce heat exchanger unit weight
Amount, in some cases, center hole can be used for stationary heat exchangers unit.
Further, by exchanging the restriction of heat pipe caliber, the same of pipe external resistance is being reduced using thinner heat exchanger tube
When, improve heat exchanger compactness so that heat exchanger overall heat exchange ability is obviously improved.In addition, heat exchanger total installed capacity
Weight is also reduced to a certain extent.
Brief description of the drawings
Fig. 1 is the structural representation described in present example.
Fig. 2 a and Fig. 2 b are respectively the view of two different angles of heat exchanger described in present example.
Fig. 2 c are the collection chamber schematic diagram described in present example.
Fig. 3 is Fig. 1 vertical section flow schematic diagram.
In figure：Thermal current flows into collection chamber 1, internal layer spiral heat exchange tube 2, outer layer spiral heat exchange tube 3, thermal current outflow gas collection
Room 4, air collecting chamber 5, center hole 6, central recess 7.
Embodiment
The present invention is described in further detail in conjunction with specific embodiments for inner face, it is described be explanation of the invention and
It is not to limit.
Tubular type gas-to-gas heat exchanger in a kind of circular passage of the present invention, as shown in figures 1 and 3, including it is some along circular passage
The heat exchange unit being circumferentially uniformly arranged；Axially movable, described heat exchange unit is included respectively along cold cold airflow in circulating line
The thermal current of air flow direction arrangement flows into collection chamber 1 and thermal current outflow collection chamber 4, and two ends flow into thermal current collect respectively
Air chamber 1 flows out some screw type heat exchanger tubes that collection chamber 4 is connected with thermal current；Screw type heat exchanger tube is radially divided into along circular passage
Outer layer spiral heat exchange tube 3 and internal layer spiral heat exchange tube 2, and be arranged in order distribution along cold airflow flow direction and form heat-exchanging tube bundle；Hot gas
The entrance and thermal current of stream inflow collection chamber 1 flow out the outlet of collection chamber 4 positioned at same one end of heat exchange unit, and annular with passing through
The inwall or outer wall of passage are set, and the other end of heat exchange unit is free end.As shown in figure 1, heat-exchanging tube bundle is arranged in order and curved
Roll over for arc, tube outer diameter preferably is no more than 6mm.Cold airflow flows in circular passage, and thermal current is in heat exchange Bottomhole pressure.
Present invention heat exchanger has higher intraductal heat exchange coefficient for comparing other pattern pipe heat exchangers, while thermal stress distribution is more
To be uniform, so as to ensure that the security and durability that heat transmission equipment is used under high-temperature and high-pressure conditions.Heat-exchanging tube bundle is arc
Arrangement, is conducive to improving the compactness and thermal expansion adaptivity of heat exchanger.Heat exchanger unit can be according to different demands with difference
Number is evenly arranged in circular passage.Its heat exchanger unit is assembled into pipe by some single high-temperature-resistant high-pressure-resistant alloy helix tubes
Shu Bingyu collection chambers are welded to form.
The present invention by thermal fluid inlet collection chamber 1, the inside and outside helical layer type heat exchanger tube 2 of high-temperature-resistant high-pressure-resistant metal alloy,
3, hot fluid outlet ports collection chamber 4 is constituted.In order to adapt to various design requirements, heat exchanger tube can be designed as different crooked radians and
Length.As shown in Figure 2 a, in hot junction flow air introduced by thermal fluid inlet collection chamber, cold end air channel air by heat exchanger tube outside,
Flow after air is cooled and drawn by hot fluid outlet ports collection chamber in hot junction.As shown in Figure 2 b, hot fluid flows into collection chamber 1 and hot-fluid
Body outflow collection chamber 4 has an identical structure, and each collection chamber includes two air collecting chambers 5, each air collecting chamber 5 respectively with outer helical layer
Heat exchanger tube 3 is connected with internal layer spiral heat exchange tube 2, and connection edge is fillet, to reduce local resistance loss.Collection chamber and gas collection
The big I of chamber is according to heat exchanger width and heat exchanger tube size adjusting.As shown in Figure 2 c, each collection chamber includes a center hole 6
With a central recess 7, central recess 7 is flowed to along cold airflow and set, and for further reducing gas collection component weight, and reduces gas
Flow resistance power.Thermal current flow into two air collecting chambers 5 of collection chamber 1 respectively with outer layer spiral heat exchange tube 3 and internal layer spiral heat exchange tube 2
Entrance is connected, and the entrance of collection chamber 1 is flowed into as thermal current；Thermal current outflow collection chamber 4 two air collecting chambers 5 respectively with outer layer spiral shell
The outlet of heat exchanger tube 3 and internal layer spiral heat exchange tube 2 is revolved, is exported as thermal current outflow collection chamber 4.
According to different situations, center hole 6 can also be used for stationary heat exchangers unit.This preferred embodiment is six groups of spiral heat exchange
Pipe, outer layer and each three groups of internal layer.This kind of double helix pipe heat exchanger has considerable flexibility and compactedness.
Claims (8)
1. double helix tubular type gas-to-gas heat exchanger in a kind of circular passage, it is characterised in that including some circumferentially equal along circular passage
The even heat exchange unit being arranged in circular passage；
Axially movable, described heat exchange unit includes the thermal current for flowing to arrangement along cold airflow respectively to cold airflow in circulating line
Collection chamber (1) and thermal current outflow collection chamber (4) are flowed into, and two ends flow into collection chamber (1) and thermal current with thermal current respectively
Flow out some screw type heat exchanger tubes of collection chamber (4) connection；
Screw type heat exchanger tube includes exchanging heat along the outer layer spiral heat exchange tube (3) and interior helical layer that circular passage is radially set in gap
Manage (2), and be arranged in order distribution along cold airflow flow direction respectively and form heat-exchanging tube bundle；
Thermal current flows into the entrance of collection chamber (1) and thermal current outflow collection chamber (4) outlet is located at same one end of heat exchange unit, and
The inwall or outer wall for both passing through circular passage are set, and the other end of heat exchange unit is free end.
2. double helix tubular type gas-to-gas heat exchanger in a kind of circular passage according to claim 1, it is characterised in that outer layer
Spiral heat exchange tube (3) and internal layer spiral heat exchange tube (2) distinguish curved set in windward side.
3. double helix tubular type gas-to-gas heat exchanger in a kind of circular passage according to claim 1, it is characterised in that heat exchange
The inwall or outer wall of unit free end and adjacent circular passage are set in gap.
4. double helix tubular type gas-to-gas heat exchanger in a kind of circular passage according to claim 1, it is characterised in that heat exchange
Restrain and set in radially being arranged in double-layer spiral for circular passage.
5. double helix tubular type gas-to-gas heat exchanger in a kind of circular passage according to claim 1, it is characterised in that hot gas
Stream, which flows into collection chamber (1) and thermal current outflow collection chamber (4), has identical structure；
Each collection chamber includes two air collecting chambers (5), thermal current flow into two air collecting chambers (5) of collection chamber (1) respectively with outer layer
Spiral heat exchange tube (3) is connected with the entrance of internal layer spiral heat exchange tube (2), two air collecting chambers (5) of thermal current outflow collection chamber (4)
Respectively with outer layer spiral heat exchange tube (3) and the outlet of internal layer spiral heat exchange tube (2)；
Each collection chamber center is provided with center hole (6) and central recess (7)；Central recess (7) is set along cold airflow flow direction
Put.
6. double helix tubular type gas-to-gas heat exchanger in a kind of circular passage according to claim 1, it is characterised in that spiral
The pipe external diameter of type heat exchanger tube is 2mm~4mm.
7. double helix tubular type gas-to-gas heat exchanger in a kind of circular passage according to claim 1, it is characterised in that spiral
The bore of type heat exchanger tube is 1.4mm~3.4mm.
8. double helix tubular type gas-to-gas heat exchanger in a kind of circular passage according to claim 1, it is characterised in that spiral
Type heat exchanger tube uses minimum tolerable temperature for 500 DEG C, and minimum proof pressure is made up of 3MPa nichrome pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710399636.1A CN107131776A (en) | 2017-05-31 | 2017-05-31 | Double helix tubular type gas-gas heat exchanger in a kind of circular passage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710399636.1A CN107131776A (en) | 2017-05-31 | 2017-05-31 | Double helix tubular type gas-gas heat exchanger in a kind of circular passage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107131776A true CN107131776A (en) | 2017-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710399636.1A Pending CN107131776A (en) | 2017-05-31 | 2017-05-31 | Double helix tubular type gas-gas heat exchanger in a kind of circular passage |
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| Country | Link |
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| CN (1) | CN107131776A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553519A (en) * | 2019-09-19 | 2019-12-10 | 北京航空航天大学 | Tube bundle type heat exchanger |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1278311A (en) * | 1917-03-21 | 1918-09-10 | American Marine Equipment Corp | Feed-water heater, evaporator, and the like. |
| WO2003012356A1 (en) * | 2001-07-21 | 2003-02-13 | Hans Henting | Heat exchanger |
| CN105043143A (en) * | 2015-08-27 | 2015-11-11 | 西安交通大学 | Pipe type air-air heat exchanger in annular channel |
| CN205425897U (en) * | 2016-03-23 | 2016-08-03 | 安徽文鼎能源投资管理有限公司 | High -efficiency heat exchanger |
-
2017
- 2017-05-31 CN CN201710399636.1A patent/CN107131776A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1278311A (en) * | 1917-03-21 | 1918-09-10 | American Marine Equipment Corp | Feed-water heater, evaporator, and the like. |
| WO2003012356A1 (en) * | 2001-07-21 | 2003-02-13 | Hans Henting | Heat exchanger |
| CN105043143A (en) * | 2015-08-27 | 2015-11-11 | 西安交通大学 | Pipe type air-air heat exchanger in annular channel |
| CN205425897U (en) * | 2016-03-23 | 2016-08-03 | 安徽文鼎能源投资管理有限公司 | High -efficiency heat exchanger |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553519A (en) * | 2019-09-19 | 2019-12-10 | 北京航空航天大学 | Tube bundle type heat exchanger |
| CN110553519B (en) * | 2019-09-19 | 2020-10-23 | 北京航空航天大学 | Tube bundle type heat exchanger |
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Application publication date: 20170905 |