CN101586477A - Turbulent baffle heat transfer enhancing device with jet impingement function - Google Patents
Turbulent baffle heat transfer enhancing device with jet impingement function Download PDFInfo
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- CN101586477A CN101586477A CNA2008101124275A CN200810112427A CN101586477A CN 101586477 A CN101586477 A CN 101586477A CN A2008101124275 A CNA2008101124275 A CN A2008101124275A CN 200810112427 A CN200810112427 A CN 200810112427A CN 101586477 A CN101586477 A CN 101586477A
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- baffle
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Abstract
The invention discloses a turbulent baffle heat transfer enhancing device with jet impingement function, and relates to the heat transfer technology. The heat transfer enhancing structure with impingement and turbulence functions utilizes a zigzag channel arranged along a blade expanding direction, controls the section surface of a circulation part by regulating a baffle structure in the channel to achieve the aim of enhancing heat transfer, and is suitable to be arranged on a trailing edge of a turbine blade of a gas turbine with narrow space and high heat load to form a closed cooling structure. The jet baffle turbulent structure of the invention has simple structure and high heat exchange capacity, can meet the cooling requirement of the trailing edge of the turbine blade of the gas turbine through high-efficiency impingement cooling function, and can effectively cool the high-temperature trailing edge of the turbine blade on the premise of closed cycle of a cooling medium, reduce mixing loss caused by cooling, and make the temperature on the trailing edge of the blade distributed more evenly compared with other open cooling structures applied to the trailing edge of the turbine blade.
Description
Technical field
The present invention relates to a kind of turbulent baffle heat transfer enhancing device with percussion, characteristics narrow and small at gas turbine turbine blade trailing edge space, that heat load is higher and researching and developing, be used to be arranged in turbine blade trailing edge part, when satisfying turbine blade trailing edge district cooling needs, realize the requirement of enclosed cooling.
Background technique
Snake type passage cooling structure is widely used in the cooling of gas turbine turbine blade, method by reasonable adjustment cross section of fluid channel and increase flow-disturbing, form local snake type channel design with ribbing, but this structure generally along chord of blade to arranging (cooling medium flows along leaf exhibition direction), the main rib structure augmentation of heat transfer that relies on is used for the cooling of the bigger blade central region in space.For the cooling of turbine blade trailing edge part, because this regional space is narrow and small, carry out turbulent flow reinforced heat transfer by the method for arranging less short rib or cylinder rib usually, but this structure relative complex, and can not satisfy the requirement of cooling medium closed cycle.
Summary of the invention
The objective of the invention is the characteristics narrow and small according to turbine blade trailing edge segment space, that heat load is higher, a kind of turbulent baffle heat transfer enhancing device with jet impingement function is disclosed, this device is arranged snake type passage along leaf exhibition direction, and by adjusting the angle between two groups of parallel baffles that constitute the passage that crawls, formation has the cooling structure of jet impingement function to trailing edge one side, strengthen the convection heat exchange effect, to satisfy the cooling requirement of trailing edge part.Structure of the present invention is simple relatively, has considered the requirement of trailing edge part intensity simultaneously by baffle arrangement, and satisfies the needs of enclosed cooling.
For achieving the above object, technical solution of the present invention is:
A kind of turbulent baffle heat transfer enhancing device with jet impingement function comprises blade, baffle plate; It is in turbine blade trailing edge partial interior cavity, open up direction with the dividing plate separated into two parts along leaf, a part is passage A, another part is a channel B, and the width of passage A is greater than the width of channel B, and two passage A, B respectively are provided with opening in the blade upper end, separate with dividing plate, one is the import of passage A, and another is the outlet of channel B, and two passages communicate at the blade tail end; Be provided with most baffle plates in the passage A inner chamber on the direction vertical with leaf exhibition direction, most baffle plates are parallel to each other and arrange about alternate, constitute along the snake type channel design of leaf exhibition direction.
Described turbulent baffle heat transfer enhancing device, two groups of baffle plates about it is described, along in the snake type passage of leaf exhibition direction, baffle plate is mutually 10～15 ° of angles on the same group, makes cooling medium form percussion to the trailing edge limit when flowing through snake type passage.
Described turbulent baffle reinforced heat exchanger, the baffle plate in its described snake type passage reduce the long-pending continuity that keeps of cross section of fluid channel, quicken to guarantee the non-step evolution that fluid flows under the local assault effect.
The comprehensive heat exchange effect of device of the present invention is better, can realize the design of enclosed cooling flowing path, compare with other cooling structure that routine is used at blade trailing edge, have and to realize that the cooling medium closed cycle requires, easy to process and characteristic of simple structure, simultaneously, reduce the blending loss that cooling brings, and can make the temperature distribution at blade trailing edge place more even.Be fit to be arranged in the gas turbine turbine blade trailing edge part that the space is narrow and small, heat load is higher, form the enclosed cooling structure.
Description of drawings
Fig. 1 is a kind of turbulent baffle heat transfer enhancing device structural representation with jet impingement function of the present invention.
Embodiment
As shown in Figure 1, be applied to the turbulent baffle cooling structure with jet impingement function and the cooling medium stream schematic representation of turbine blade trailing edge part for the present invention.In turbine blade trailing edge part 10 internal cavities, open up direction with dividing plate 1 separated into two parts along leaf, a part is passage A, another part is a channel B, and the width of passage A is greater than the width of channel B, and two passage A, B respectively are provided with opening in the blade upper end, separate with dividing plate 1, one is the import 3 of passage A, and another is the outlet 4 of channel B, and passage A, B communicate at blade tail end 5.Be provided with a plurality of baffle plates 2 in the passage A inner chamber on the direction vertical with leaf exhibition direction, a plurality of baffle plates 2 are parallel to each other and arrange about alternate, constitute along the snake type channel design of leaf exhibition direction 7.The baffle plate on the same group of two groups of baffle plates 2 is mutually 10～15 ° of angles, makes cooling medium form percussion to blade trailing edge limit 6 when flowing through snake type passage.The snake type channel design that a plurality of baffle plates 2 constitute along leaf exhibition direction, because of turbine blade trailing edge transverse dimension is partly constantly dwindled to the end by the middle part, the long-pending continuity that keeps of cross section of fluid channel is reduced, guaranteed that the non-step evolution that fluid flows under the local assault effect quickens.
A kind of turbulent baffle heat transfer enhancing device of the present invention with jet impingement function, cooling medium is opened up the direction air inlet by import 3 along the turbine blade leaf, successively through behind the snake type passage A that forms by baffle plate 2, enter along the channel B of leaf exhibition direction through blade tail end 5, finally flow out via outlet 4 again along leaf exhibition direction 7.Cooling medium inlet 3 and outlet 4 are in the same side.
See Fig. 1, the present invention can make the cooling medium of trailing edge part flow to along turbine blade leaf exhibition direction after using this jet baffle plate turbulence structure, flows out along leaf exhibition direction, thereby realizes the purpose that the closed type structure cooling medium reclaims.When cooling medium flowed in this structure, the passage of convergent made to flow and constantly quickens, and caused percussion to trailing edge by 180 ° of zig zags of trailing edge one side, effectively cooled off this high heat load zone; By two groups of baffle plate angulations, baffle length and baffle number are adjusted, make cooling medium when the approach inner passage, realize the little lasting acceleration of step evolution, correlative study is the result show: the heat exchange situation of variable cross section U type channel outer wall is consistent with the velocity variations trend that the inner passage cooling medium flows, thereby implement above-mentioned measure, this zone turbine blade wall temperature is evenly distributed, and cooling effectiveness is higher.
Turbulent baffle structure with jet impingement function of the present invention, by adjusting two groups of baffle plate angles, baffle length and baffle number, formation is along the snake type channel design of leaf exhibition direction, can realize percussion, can solve this zone preferably and utilize the enclosed cooling structure to satisfy the problem that cooling requires turbine blade trailing edge part.Reduce the flow channel sectional area by the multichannel continuity, make cooling fluid remain the state that continues acceleration, form certain impact trailing edge effect in passage trailing edge limit 6 one sides.
Carrying out local Study on Cooling at turbine blade trailing edge certain applications jet baffle plate turbulence structure finds, the comprehensive heat exchange effect of device of the present invention is better, can realize the design of enclosed cooling flowing path, compare with other cooling structure that routine is used at blade trailing edge, have and to realize that the cooling medium closed cycle requires, easy to process and characteristic of simple structure.
The present invention is not limited to the trailing edge part snake type passage cooling structure that two groups of parallel baffles constitute; for constituting along the structure of turbine blade leaf exhibition direction snake type passage at trailing edge by the baffle plate of arranging other form arrangement; or on this architecture basics, increase enhanced heat exchange structure, all belong to protection scope of the present invention.
Claims (3)
1. the turbulent baffle heat transfer enhancing device with jet impingement function comprises blade, baffle plate; It is characterized in that, in turbine blade trailing edge partial interior cavity, with the dividing plate separated into two parts, a part is passage A along leaf exhibition direction, and another part is a channel B, the width of passage A is greater than the width of channel B, two passage A, B respectively are provided with opening in the blade upper end, separate with dividing plate, and one is the import of passage A, another is the outlet of channel B, and two passages communicate at the blade tail end; Be provided with most baffle plates in the passage A inner chamber on the direction vertical with leaf exhibition direction, most baffle plates are parallel to each other and arrange about alternate, constitute along the snake type channel design of leaf exhibition direction.
2. turbulent baffle heat transfer enhancing device according to claim 1, it is characterized in that, described about two groups of baffle plates, along in the snake type passage of leaf exhibition direction, baffle plate is mutually 10～15 ° of angles on the same group, makes cooling medium form percussion to the trailing edge limit when flowing through snake type passage.
3. turbulent baffle reinforced heat exchanger according to claim 1 and 2 is characterized in that, the baffle plate in the described snake type passage reduces the long-pending continuity that keeps of cross section of fluid channel, quickens to guarantee the non-step evolution that fluid flows under the local assault effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101124275A CN101586477B (en) | 2008-05-23 | 2008-05-23 | Turbulent baffle heat transfer enhancing device with jet impact function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101124275A CN101586477B (en) | 2008-05-23 | 2008-05-23 | Turbulent baffle heat transfer enhancing device with jet impact function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101586477A true CN101586477A (en) | 2009-11-25 |
| CN101586477B CN101586477B (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101124275A Expired - Fee Related CN101586477B (en) | 2008-05-23 | 2008-05-23 | Turbulent baffle heat transfer enhancing device with jet impact function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894844A (en) * | 2015-12-21 | 2017-06-27 | 通用电气公司 | For the cooling circuit of many wall blades |
| CN107989660A (en) * | 2016-10-26 | 2018-05-04 | 通用电气公司 | Part cladding trailing edge cooling circuit with pressure side collision |
| CN111569968A (en) * | 2020-05-20 | 2020-08-25 | 重庆大学 | Cooling electrode for high-temperature electric heating experiment |
| CN113675160A (en) * | 2021-08-16 | 2021-11-19 | 西北工业大学 | Impact flow double-layer flow guide micro-channel heat sink suitable for high heat flow density device |
| CN114250612A (en) * | 2020-09-22 | 2022-03-29 | 云米互联科技(广东)有限公司 | Heat exchange piece of dehumidifying device, dehumidifying device and clothes dryer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1167689A1 (en) * | 2000-06-21 | 2002-01-02 | Siemens Aktiengesellschaft | Configuration of a coolable turbine blade |
| DE10331635B4 (en) * | 2003-07-12 | 2014-02-13 | Alstom Technology Ltd. | Cooled shovel for a gas turbine |
| US20060269409A1 (en) * | 2005-05-27 | 2006-11-30 | Mitsubishi Heavy Industries, Ltd. | Gas turbine moving blade having a platform, a method of forming the moving blade, a sealing plate, and a gas turbine having these elements |
-
2008
- 2008-05-23 CN CN2008101124275A patent/CN101586477B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894844A (en) * | 2015-12-21 | 2017-06-27 | 通用电气公司 | For the cooling circuit of many wall blades |
| CN107989660A (en) * | 2016-10-26 | 2018-05-04 | 通用电气公司 | Part cladding trailing edge cooling circuit with pressure side collision |
| CN107989660B (en) * | 2016-10-26 | 2022-03-01 | 通用电气公司 | Partially clad trailing edge cooling circuit with pressure side impingement |
| CN111569968A (en) * | 2020-05-20 | 2020-08-25 | 重庆大学 | Cooling electrode for high-temperature electric heating experiment |
| CN114250612A (en) * | 2020-09-22 | 2022-03-29 | 云米互联科技(广东)有限公司 | Heat exchange piece of dehumidifying device, dehumidifying device and clothes dryer |
| CN114250612B (en) * | 2020-09-22 | 2023-12-15 | 云米互联科技(广东)有限公司 | Heat exchange piece of dehumidifying device, dehumidifying device and clothes dryer |
| CN113675160A (en) * | 2021-08-16 | 2021-11-19 | 西北工业大学 | Impact flow double-layer flow guide micro-channel heat sink suitable for high heat flow density device |
| CN113675160B (en) * | 2021-08-16 | 2024-01-30 | 西北工业大学 | Impact flow double-layer diversion micro-channel heat sink suitable for high heat flow density device |
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| Publication number | Publication date |
|---|---|
| CN101586477B (en) | 2011-04-13 |
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