CN103592330A - Flow mixing device for air duct system - Google Patents
Flow mixing device for air duct system Download PDFInfo
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- CN103592330A CN103592330A CN201310349001.2A CN201310349001A CN103592330A CN 103592330 A CN103592330 A CN 103592330A CN 201310349001 A CN201310349001 A CN 201310349001A CN 103592330 A CN103592330 A CN 103592330A
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Abstract
The invention relates to a flow mixing device for an air duct system. The flow mixing device is characterized by comprising an inlet section, a heating section, a mixed rectification section and a contraction section, wherein the inlet section is connected with the heating section and the heating section is connected with the mixed rectification section; the mixed rectification section is connected with the contraction section; the tail end of the contraction section is connected with a heat exchanger testing piece; air enters from the inlet section and is mixed and rectified so that the air temperature is distributed uniformly; then the air flows out from the contraction section to pass through the heat exchanger testing piece so as to finish a temperature test. The flow mixing device for the air duct system is applicable to a testing air duct system for heat transfer coefficients and resistance properties of a heat exchanger of large-size power generation equipment; a set of flow mixing structure with an adjustable angle is adopted so that the speed and the temperature of the air entering the heat exchanger testing piece is distributed uniformly, the hot air temperature distribution uniformity is improved effectively and the testing accuracy of an air temperature of the inlet of the heat exchanger testing piece is improved.
Description
Technical field
The present invention relates to the flow mixing device for air-line system, be specifically related to a kind of flow mixing device for being applied in air cooler and oil cooler in the fields such as large power generating equipment and carrying out in the air-line system of heat transfer and resistance characteristic test.
Background technology
Development along with society and economy, energy-efficiently to design of heat exchanger, new target has been proposed, the heat exchanger research of heat transfer and resistance characteristic test-bed Shi Ge heat interchanger manufacturing enterprise, the important tests equipment of manufacturing and verifying, its test findings will directly affect its heat interchanger product competitive power on market at home and abroad, and design is developed new and effective heat exchange equipment.
In heat interchanger test, generally will provide the controlled air system of temperature to be referred to as air-line system, in air-line system, be to get its average and represent and enter heat interchanger test block intake air temperature value by testing several somes temperature values, thereby, in airduct, the Temperature Distribution of moving air is more even, and test result is more accurate.The factors such as time of being detained in well heater due to gravity, gas flow and the gas of air self is short, can make gas-heated inhomogeneous, have reduced the accuracy of test result, therefore, are badly in need of solving the phenomenon of air themperature skewness.
Summary of the invention
The present invention, for fear of the accuracy that improves heat exchanger heat-transfer performance test, provides a kind of flow mixing device for air-line system, thereby can regulate the homogeneity of the direction change air themperature of Air Flow.
Technical scheme of the present invention is as follows:
Flow mixing device for air-line system, it is characterized in that: comprise entrance, bringing-up section, mixed-rectification section and contraction section, described entrance connects bringing-up section, bringing-up section connects mixed-rectification section, mixed-rectification section connects contraction section, and contraction section end connects heat interchanger test block, and air enters from entrance, after mixed-rectification is evenly distributed air themperature, from contraction section, flow out through heat interchanger test block, complete temperature test.
Described entrance need to be designed to make the air-flow can be from the smooth line style that enters airduct of all directions.
In described entrance, be provided with screen pack, it is dustproof that screen pack is used for anti-gray, plays the effect of filtration to being drawn into air in airduct.
In described bringing-up section, be provided with air heater, the heating power of air heater determines according to airduct sectional dimension and required heating-up temperature, can air heat is even.
Described mixed-rectification section is designed with wind direction bridge insert and honeycomb screen successively according to the flow direction of air.
Described wind direction bridge insert is for adjusting the air of airduct from level, vertical direction, and it is even as far as possible that air themperature is distributed.
So further, wind direction bridge insert can be designed to comprise the structure of horizontal direction bridge insert and vertical direction bridge insert, horizontal direction bridge insert comprises some parallel horizontally disposed window shutter windows, vertical direction bridge insert comprises the window shutter window of some parallel vertical settings, the window of horizontal direction bridge insert all connects by a trace, the window of vertical direction bridge insert also all connects by another trace, realizes the consistance of each window angular adjustment.
Further, described wind direction bridge insert is provided with and turns to governor motion, turns to governor motion for regulating the angle of window, is used for adapting to different wind speed experiment conditions, makes the air themperature that enters flow mixing device of heat exchanger experiment part distribute even as far as possible.
The described governor motion that turns to comprises one group of gear and handwheel, and described handwheel is arranged at the outside of air-line system, and by the steering ribbon moving gear of control hand wheel, the rotation of gear driven wind direction bridge insert, realizes angular adjustment.
Described honeycomb screen is latticed grid, by honeycomb screen, can make the velocity magnitude of air-flow and direction be evenly distributed and air-flow is filtered.
The shrinkage curve of described contraction section should make flow velocity evenly increase vertically, does not produce boundary layer separation; At contraction section import and export wall, be parallel to the homogeneity that wind-tunnel axis guarantees to enter heat interchanger test block wind speed as far as possible.
The course of work of the present invention is as follows:
Air in air-line system, along the molded line direction suction inlet section of entrance, is tentatively filtered during suction;
Air after filtration enters bringing-up section, is heated to the temperature needing in bringing-up section through air heater;
Hot-air after heating continues to flow into mixed flow section, in mixed flow section, through wind direction bridge insert, regulates temperature and the velocity distribution of hot-air by the window shutter window of horizontal direction bridge insert and vertical direction bridge insert; The angle of wind direction bridge insert, by turning to governor motion to regulate, matches the angle of window shutter and incoming flow air velocity, reaches the object of mixed flow, forms the hot-air whirlpool of large scale; The hot-air whirlpool of large scale further passes through honeycomb screen, make the air swirl of large scale be rectified the air swirl that grid are divided into some small scales, the air swirl of small scale can be decayed and rapidly, thus the turbulivity that reduces air incoming flow axial direction turbulivity particularly; The air swirl of last small scale through heat interchanger test block, carries out temperature test through contraction section.
beneficial effect of the present invention is as follows:
The present invention through entrance to air filtration, through bringing-up section to air heat, through mixed flow rectification section to air mixed-rectification, according to the shrinkage curve of contraction section, enter the mode of heat interchanger test block, the uniformity coefficient that can realize the air themperature distribution of heat interchanger test block entrance improves test result again;
First entrance filters air by screen pack, filters out dust, improves the cleanliness factor that enters air, reduces the impact that dust flows to air themperature;
The air heater of bringing-up section is larger, can realize air is heated completely;
Then pass through the shutter that plays mixed flow effect of mixed flow rectification section, by the angle of free adjustment window shutter, can improve preferably Air Flow homogeneity, the air that can realize different wind speed sizes in change air-line system enters the uniformity coefficient of the air themperature distribution of heat interchanger test block entrance;
Rectification through honeycomb screen, make the air swirl of large scale change over the air swirl of equally distributed small scale, then by contraction section, enter heat interchanger test block equably, the air themperature that can realize at heat interchanger test block entrance is evenly distributed, and improves the accuracy of test result;
The present invention is specially adapted to the test board of the heat transfer and resistance characteristic of air cooler and oil cooler for large power generating equipment.
Accompanying drawing explanation
Fig. 1 is system schematic of the present invention;
Fig. 2 is window shutter flow mixing device structural representation in the present invention;
Wherein, Reference numeral is: 1 entrance, 2 air heaters, 3 heater terminals, 4 horizontal direction bridge inserts, 5 turn to governor motion, 6 vertical direction bridge inserts, 7 honeycomb screens, 8 contraction sections and 9 heat interchanger test blocks.
Embodiment
As shown in Figure 1-2, flow mixing device for air-line system, comprise entrance 1, bringing-up section, mixed-rectification section and contraction section 8, described entrance 1 connects bringing-up section, and bringing-up section connects mixed-rectification section, and mixed-rectification section connects contraction section 8, contraction section 8 ends connect heat interchanger test block 9, air enters from entrance 1, after mixed-rectification is evenly distributed air themperature, from contraction section 8, flows out through heat interchanger test block 9, completes temperature test;
Described entrance 1 need to be designed to make the air-flow can be from the smooth line style that enters airduct of all directions, such as twisted-pair cable type etc.
In described entrance 1, be provided with screen pack, it is dustproof that screen pack is used for anti-gray, plays the effect of filtration to being drawn into air in airduct.
In described bringing-up section, be provided with air heater 2, the heater terminals of air heater 2 son 3 is by this device connection power supply, and the heating power of air heater 2 determines according to airduct sectional dimension and required heating-up temperature, can air heat is even.
Described mixed-rectification section is designed with wind direction bridge insert and honeycomb screen 7 successively according to the flow direction of air.
Described wind direction bridge insert is for adjusting the air of airduct from level, vertical direction, and it is even as far as possible that air themperature is distributed.
So further, wind direction bridge insert can be designed to comprise the structure of horizontal direction bridge insert 4 and vertical direction bridge insert 6, horizontal direction bridge insert 4 comprises some parallel horizontally disposed window shutter windows, vertical direction bridge insert 6 comprises the window shutter window of some parallel vertical settings, the window of horizontal direction bridge insert all connects by a trace, the window of vertical direction bridge insert also all connects by another trace, realizes the consistance of each window angular adjustment.
Further, described wind direction bridge insert is provided with and turns to governor motion 5, turn to governor motion 5 for regulating the angle of window, be used for adapting to different wind speed experiment conditions, make the air themperature that enters flow mixing device of heat exchanger experiment part 9 distribute even as far as possible.
The described governor motion 5 that turns to comprises one group of gear and handwheel, and described handwheel is arranged at the outside of air-line system, and by the steering ribbon moving gear of control hand wheel, the rotation of gear driven wind direction bridge insert, realizes angular adjustment.
Described honeycomb screen 7 is latticed grids, by honeycomb screen 7, can make the velocity magnitude of air-flow and direction be evenly distributed and air-flow is filtered.
The shrinkage curve of described contraction section 8 should make flow velocity evenly increase vertically, does not produce boundary layer separation; At contraction section import and export wall, be parallel to the homogeneity that wind-tunnel axis guarantees to enter heat interchanger test block wind speed as far as possible.The shrinkage curve Ke Yi Wei Wei Duoxinsiji empirical curve of described contraction section 8, bicubic curve etc.
The course of work of the present invention is as follows:
Air in air-line system, along the molded line direction suction inlet section 1 of entrance 1, is tentatively filtered during suction;
Air after filtration enters bringing-up section, is heated to the temperature needing in bringing-up section through air heater 2;
Hot-air after heating continues to flow into mixed flow section, in mixed flow section, through wind direction bridge insert, regulates temperature and the velocity distribution of hot-air by the window shutter window of horizontal direction bridge insert 4 and vertical direction bridge insert 6; The angle of wind direction bridge insert, by turning to governor motion 5 to regulate, matches the angle of window shutter and incoming flow air velocity, reaches the object of mixed flow, forms the hot-air whirlpool of large scale; The hot-air whirlpool of large scale further passes through honeycomb screen 7, make the air swirl of large scale be rectified the air swirl that grid are divided into some small scales, the air swirl of small scale can be decayed and rapidly, thus the turbulivity that reduces air incoming flow axial direction turbulivity particularly; The air swirl of last small scale through heat interchanger test block 9, carries out temperature test through contraction section 8.
Claims (11)
1. for the flow mixing device of air-line system, it is characterized in that: comprise entrance (1), bringing-up section, mixed-rectification section and contraction section (8), described entrance (1) connects bringing-up section, bringing-up section connects mixed-rectification section, mixed-rectification section connects contraction section (8), contraction section (8) end connects heat interchanger test block (9), air enters from entrance (1), after mixed-rectification is evenly distributed air themperature, from contraction section (8), flow out through heat interchanger test block (9), complete temperature test.
2. the flow mixing device for air-line system according to claim 1, is characterized in that: described entrance (1) is the line style that air draught is entered glossily from all directions.
3. the flow mixing device for air-line system according to claim 1, is characterized in that: described entrance is provided with screen pack in (1), and screen pack is dustproof for anti-gray.
4. the flow mixing device for air-line system according to claim 1, is characterized in that: in described bringing-up section, be provided with air heater (2), the heating power of air heater (2) is determined according to airduct sectional dimension and required heating-up temperature.
5. the flow mixing device for air-line system according to claim 1, is characterized in that: described mixed-rectification section is designed with wind direction bridge insert and honeycomb screen (7) successively according to the flow direction of air; Described wind direction bridge insert is for adjusting the air of airduct, and air themperature is evenly distributed from level, vertical direction.
6. the flow mixing device for air-line system according to claim 5, it is characterized in that: described wind direction bridge insert comprises horizontal direction bridge insert (4) and vertical direction bridge insert (6), horizontal direction bridge insert (4) comprises some parallel horizontally disposed window shutter windows, vertical direction bridge insert (6) comprises the window shutter window of some parallel vertical settings, the window of horizontal direction bridge insert (4) all connects by a trace, the window of vertical direction bridge insert (6) also all connects by another trace, by trace, make the angular adjustment of each window of horizontal direction or vertical direction consistent.
7. the flow mixing device for air-line system according to claim 6, it is characterized in that: described wind direction bridge insert is provided with and turns to governor motion (5), turn to governor motion (5) for regulating the angle of window, adapt to different wind speed experiment conditions, the air themperature that enters flow mixing device of heat exchanger experiment part is evenly distributed.
8. the flow mixing device for air-line system according to claim 7, it is characterized in that: described in turn to governor motion (5) to comprise one group of gear and handwheel, described handwheel is arranged at the outside of air-line system, by the steering ribbon moving gear of control hand wheel, the rotation of gear driven wind direction bridge insert, realizes angular adjustment.
9. the flow mixing device for air-line system according to claim 5, is characterized in that: described honeycomb screen (7) is latticed grid, and honeycomb screen (7) is for making velocity magnitude and the direction of air-flow be evenly distributed and air-flow is filtered.
10. the flow mixing device for air-line system according to claim 1, it is characterized in that: the shrinkage curve of described contraction section (8) should make flow velocity evenly increase vertically, at contraction section (8) import and export wall, is parallel to the homogeneity that wind-tunnel axis guarantees to enter heat interchanger test block (9) wind speed as far as possible.
11. flow mixing devices for air-line system according to claim 1, is characterized in that the course of work is as follows:
First, the air in air-line system, along the molded line direction suction inlet section (1) of entrance (1), is tentatively filtered during suction;
Second step, the air after filtration enters bringing-up section, is heated to the temperature needing in bringing-up section through air heater (2);
The 3rd step, the hot-air after heating continues to flow into mixed flow section, in mixed flow section, through wind direction bridge insert, regulates temperature and the velocity distribution of hot-air by the window shutter window of horizontal direction bridge insert (4) and vertical direction bridge insert (6); The angle of wind direction bridge insert, by turning to governor motion (5) to regulate, matches the angle of window shutter and incoming flow air velocity, reaches the object of mixed flow, forms the hot-air whirlpool of large scale;
The 4th step, the hot-air whirlpool of large scale further passes through honeycomb screen (7), make the air swirl of large scale be rectified the air swirl that grid are divided into some small scales, the air swirl of small scale can be decayed and rapidly, thus the turbulivity that reduces air incoming flow axial direction turbulivity particularly;
The 5th step, the air swirl of last small scale through heat interchanger test block (9), carries out temperature test through contraction section (8).
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| CN201310349001.2A CN103592330A (en) | 2013-08-12 | 2013-08-12 | Flow mixing device for air duct system |
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| CN201310349001.2A CN103592330A (en) | 2013-08-12 | 2013-08-12 | Flow mixing device for air duct system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103900296A (en) * | 2014-03-31 | 2014-07-02 | 南方英特空调有限公司 | Flow mixing device for testing of concurrent-flow evaporator |
| CN104634814A (en) * | 2015-02-09 | 2015-05-20 | 东北石油大学 | Indoor heat environment experiment device with phase-change material curtain wall on one side and application method of indoor heat environment experiment device |
| CN104730107A (en) * | 2015-04-18 | 2015-06-24 | 国家***第一海洋研究所 | Method for laboratory observation of surface heat transfer coefficient of coastal power plant warm water discharge mathematical model |
| CN106920439A (en) * | 2017-04-21 | 2017-07-04 | 三峡大学 | A kind of reynolds test instrument and experimental technique |
| CN107290380A (en) * | 2017-06-14 | 2017-10-24 | 西安热工研究院有限公司 | Plate type heat exchanger heat transfer property transient test device and method |
| CN107985628A (en) * | 2017-12-13 | 2018-05-04 | 南京林业大学 | The simulation of wind device that wind resistance detects in a kind of agricultural unmanned plane room |
| CN108139421A (en) * | 2015-09-15 | 2018-06-08 | 英国风拓技术有限公司 | Wind sensor housing and the wind sensor for including this housing |
| CN109838290A (en) * | 2017-11-29 | 2019-06-04 | 北汽福田汽车股份有限公司 | Flow mixing device, exhaust-gas treatment system and the vehicle of exhaust-gas treatment system |
| CN110285694A (en) * | 2019-06-19 | 2019-09-27 | 武汉方特工业设备技术有限公司 | Coiled channel heat exchanger |
| CN110514569A (en) * | 2019-07-08 | 2019-11-29 | 佛山市顺德区阿波罗环保器材有限公司 | The ducting assembly of strainability detection system of fume filtering element |
| CN110559900A (en) * | 2019-09-03 | 2019-12-13 | 南京航空航天大学 | high-efficient compact blender with asymmetric cascade structure |
| CN111366389A (en) * | 2020-03-16 | 2020-07-03 | 上海交通大学 | Moisture-containing dust-containing air flow supply device and control method |
| CN111579264A (en) * | 2020-05-22 | 2020-08-25 | 浙江银轮机械股份有限公司 | Temperature measurement method and temperature measurement tool |
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Cited By (18)
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| CN103900296A (en) * | 2014-03-31 | 2014-07-02 | 南方英特空调有限公司 | Flow mixing device for testing of concurrent-flow evaporator |
| CN104634814A (en) * | 2015-02-09 | 2015-05-20 | 东北石油大学 | Indoor heat environment experiment device with phase-change material curtain wall on one side and application method of indoor heat environment experiment device |
| CN104634814B (en) * | 2015-02-09 | 2017-03-01 | 东北石油大学 | Side carries indoor thermal environment experimental provision and the using method of phase-change material curtain wall |
| CN104730107A (en) * | 2015-04-18 | 2015-06-24 | 国家***第一海洋研究所 | Method for laboratory observation of surface heat transfer coefficient of coastal power plant warm water discharge mathematical model |
| CN108139421B (en) * | 2015-09-15 | 2020-08-14 | 英国风拓技术有限公司 | Wind sensor housing and wind sensor comprising such a housing |
| US10908176B2 (en) | 2015-09-15 | 2021-02-02 | Ft Technologies (Uk) Ltd | Wind sensor housing |
| CN108139421A (en) * | 2015-09-15 | 2018-06-08 | 英国风拓技术有限公司 | Wind sensor housing and the wind sensor for including this housing |
| CN106920439A (en) * | 2017-04-21 | 2017-07-04 | 三峡大学 | A kind of reynolds test instrument and experimental technique |
| CN107290380A (en) * | 2017-06-14 | 2017-10-24 | 西安热工研究院有限公司 | Plate type heat exchanger heat transfer property transient test device and method |
| CN109838290A (en) * | 2017-11-29 | 2019-06-04 | 北汽福田汽车股份有限公司 | Flow mixing device, exhaust-gas treatment system and the vehicle of exhaust-gas treatment system |
| CN107985628A (en) * | 2017-12-13 | 2018-05-04 | 南京林业大学 | The simulation of wind device that wind resistance detects in a kind of agricultural unmanned plane room |
| CN110285694A (en) * | 2019-06-19 | 2019-09-27 | 武汉方特工业设备技术有限公司 | Coiled channel heat exchanger |
| CN110285694B (en) * | 2019-06-19 | 2024-03-12 | 武汉方特工业设备技术有限公司 | Coiled pipe type channel heat exchanger |
| CN110514569A (en) * | 2019-07-08 | 2019-11-29 | 佛山市顺德区阿波罗环保器材有限公司 | The ducting assembly of strainability detection system of fume filtering element |
| CN110514569B (en) * | 2019-07-08 | 2022-07-19 | 佛山市顺德区阿波罗环保器材有限公司 | Air duct assembly of oil smoke filter element primary filtering performance detection system |
| CN110559900A (en) * | 2019-09-03 | 2019-12-13 | 南京航空航天大学 | high-efficient compact blender with asymmetric cascade structure |
| CN111366389A (en) * | 2020-03-16 | 2020-07-03 | 上海交通大学 | Moisture-containing dust-containing air flow supply device and control method |
| CN111579264A (en) * | 2020-05-22 | 2020-08-25 | 浙江银轮机械股份有限公司 | Temperature measurement method and temperature measurement tool |
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Application publication date: 20140219 |