Turbulent flow column for enhancing heat exchange, turbine blade and gas turbine

Abstract

The invention provides a heat exchange enhancing turbulent flow column, a turbine blade and a gas turbine. The turbulent flow column for enhancing heat exchange comprises at least two torsion columns, the torsion columns are in a spiral line shape surrounding a virtual axis and extending along the virtual axis, and the number of the torsion columns is at least two, and the virtual axis is collinear. According to the turbulent flow column for enhancing heat exchange, the flowing fluid can generate complex turbulent flow through the at least two torsion columns with the virtual axes collinear, and therefore the fluid can generate better heat exchange and cooling effects.

Description

Technical Field

[0001] This invention relates to the field of blade cooling, specifically to a turbulence column for enhanced heat transfer, turbine blades, and gas turbines. Background Technology

[0002] During operation, the turbine blades inside a gas turbine are in a high-temperature environment. In related technologies, the turbine blades are equipped with cooling chambers for cooling gas flow. The cooling chambers are equipped with turbulence columns to create turbulence in the cooling gas, thereby exchanging heat and cooling the turbine blades. However, the turbulence columns in related technologies are set as straight columns, and the turbulence formed is simple, resulting in poor heat exchange and cooling effect of the turbine blades. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention propose a turbulence column, turbine blades, and gas turbine for enhanced heat transfer.

[0005] The heat transfer enhancement turbulence column of this invention includes: A torsion column, wherein the torsion column is a spiral shape that surrounds and extends along the virtual axis, and the torsion column is configured to be at least two collinear with the virtual axis.

[0006] The heat-enhancing turbulence column of this invention, through at least two torsion columns with collinear virtual axes, can generate complex turbulence in the flowing fluid, thereby producing a better heat exchange and cooling effect.

[0007] In some embodiments, the at least two torsion columns have the same helical direction and abut each other.

[0008] In some embodiments, the at least two torsion columns have the same helical direction and are arranged circumferentially at intervals along the virtual axis.

[0009] In some embodiments, the torsion column includes a first torsion column and a second torsion column, wherein the first torsion column and the second torsion column have opposite helical directions.

[0010] In some embodiments, the first torsion column is at least two circumferentially spaced along the virtual axis, and the second torsion column is at least two circumferentially spaced along the virtual axis, wherein the at least two first torsion columns and the at least two second torsion columns are arranged in a grid pattern.

[0011] In some embodiments, there are at least three torsion columns with the same helical direction.

[0012] In some embodiments, the cross-section of the torsion column is circular or polygonal.

[0013] The turbine blade of this invention includes: The cooling chamber and the heat-enhancing turbulence column as described in any of the above embodiments, wherein the heat-enhancing turbulence column is located inside the cooling chamber and connected between two chamber walls that are disposed opposite to each other in the cooling chamber.

[0014] The turbine blade of this invention, by setting the heat-enhancing turbulence column of this invention in the cooling chamber, generates complex turbulence in the fluid of the cooling chamber to achieve a better heat exchange and cooling effect, thereby enabling the turbine blade to have a lower temperature to extend its service life and to be suitable for higher ambient temperatures.

[0015] In some embodiments, the heat-enhancing turbulence columns are arranged in at least two rows spaced apart along a first direction, each row including a plurality of heat-enhancing turbulence columns spaced apart along a second direction, wherein in two adjacent rows of heat-enhancing turbulence columns, a plurality of heat-enhancing turbulence columns in one row are alternately arranged with a plurality of heat-enhancing turbulence columns in the other row.

[0016] The gas turbine of this invention includes: the turbine blades described in any of the above embodiments.

[0017] The gas turbine of this invention can operate under higher temperature conditions by employing the turbine blades of this invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a first embodiment of the turbulence column for enhanced heat transfer according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a second embodiment of the turbulence column for enhanced heat transfer according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a third embodiment of the turbulence column for enhanced heat transfer according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the fourth embodiment of the turbulence column for enhanced heat transfer according to the present invention. Figure 5 This is a schematic diagram of the fifth embodiment of the heat-enhancing turbulence column of the present invention; Figure 6 This is a partial schematic diagram of a turbine blade according to an embodiment of the present invention. The turbulence column for enhancing heat transfer in the figure adopts the second embodiment. Figure 7 yes Figure 6 Top view of the turbine blades after the first chamber wall has been removed; Figure 8 yes Figure 7 A schematic diagram of the fluid flow in the operation of the turbulence column for enhanced heat transfer in the middle section. The arrows in the diagram indicate the direction of fluid flow.

[0019] Figure label: 1. Torsion column; 11. First torsion column; 12. Second torsion column; 2. Chamber wall; 21. First chamber wall; 22. Second chamber wall; 3. Intercolumn passage; 4. Intracolumn space. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] The following is for reference. Figures 1-8 A turbulence column, turbine blade, and gas turbine with enhanced heat transfer according to an embodiment of the present invention are described.

[0022] like Figures 1-5 As shown, the turbulence column for enhanced heat transfer in this embodiment of the invention includes a torsion column 1.

[0023] Torsion column 1 is a spiral shape that surrounds and extends along the virtual axis, such as... Figures 1-5 As shown, the virtual axis can be selected as a straight line set in the vertical direction, and the torsion column 1 is a column set along a spiral line, which surrounds the virtual axis and extends along the virtual axis. The torsion column 1 is set as at least two collinear virtual axes.

[0024] The enhanced heat transfer turbulence column of this invention, through at least two torsion columns 1 with collinear virtual axes, can generate complex turbulence in the flowing fluid, thereby achieving a better heat transfer and cooling effect. The fluid can be a cooling gas.

[0025] In some embodiments, such as Figure 2 As shown, at least two torsion columns 1 have the same spiral direction and abut against each other.

[0026] The torsion column 1 can be selected as two, and the two torsion columns 1 can be spiraled clockwise or counterclockwise from bottom to top. They can be selected to be spiraled counterclockwise from bottom to top. The two torsion columns 1 abut against each other so that there is no gap between the two torsion columns 1.

[0027] When the fluid flows through the turbulence column that enhances heat exchange, it forms spiral upward and / or spiral downward around the column along the outer surface of the two torsional columns 1, which enhances the turbulence of the fluid and thus enhances the heat exchange and cooling effect.

[0028] Meanwhile, the two torsion columns 1 have a large contact area with the fluid, which enables rapid heat exchange with the fluid to improve the heat exchange and cooling effect.

[0029] In some embodiments, such as Figure 2 and Figure 3 As shown, at least two torsion columns 1 have the same helical direction and are arranged circumferentially at intervals along the virtual axis.

[0030] Furthermore, the torsion columns 1 are set to at least three with the same spiral direction to achieve a stronger degree of turbulence and thus a better heat exchange and cooling effect.

[0031] Optionally, there are three torsion columns 1, which are either all clockwise or all counterclockwise spirals from bottom to top. Optionally, they are all counterclockwise spirals from bottom to top. The three torsion columns 1 are circumferentially aligned with the virtual axis (e.g., Figure 2 and Figure 3 The columns are arranged at intervals (as shown in the vertical direction) to form inter-column channels 3 between adjacent torsion columns 1 and to form an internal column space 4 around which the three torsion columns 1 are arranged. The internal column space 4 is as follows: Figure 8 The three torsion columns 1 shown form a circular cylindrical space.

[0032] like Figure 8 As shown, the fluid can be a gas, and a portion of the fluid is on the windward side of the turbulence column that enhances heat transfer (e.g., Figure 8 The flow (as shown below) from the inter-column channel 3 into the column space 4 forms a turbulent flow around the column upon contact with the outer surface of the torsion column 1, and then flows to the leeward side of the turbulent column that enhances heat transfer (e.g., the lower side). Figure 8 The fluid flows out from the inter-column channel 3 (as shown above) and forms a turbulent flow around the column when it contacts the outer surface of the torsion column 1. The turbulence of the fluid is enhanced by the disturbance of the two-stroke turbulence, thereby improving the heat exchange and cooling effect. It can also avoid the formation of a flow dead zone on the leeward side of the turbulence column that enhances heat exchange, thus improving the uniformity of heat exchange and cooling.

[0033] Meanwhile, since the torsion column 1 is spiral-shaped and the inter-column channel 3 is also spiral-shaped, the fluid will form complex turbulence when passing through the inter-column channel 3. At the same time, when the fluid flows from the inter-column channel 3 into the column space 4 and from the column space 4 into the inter-column channel 3, it will also form complex turbulence inside the column space 4, thereby further increasing the degree of fluid turbulence and improving the heat exchange and cooling effect.

[0034] Another portion of the fluid, stopped by the torsion column 1, flows circumferentially along the turbulent column that enhances heat transfer. Figure 8The fluid flowing on the left and right sides of the enhanced heat exchange turbulence column flows towards the leeward side. The fluid flowing along the left side of the enhanced heat exchange turbulence column mixes with the fluid flowing from the left side of the enhanced heat exchange turbulence column into the column space 4 and out of the column space 4. The fluid flowing along the right side of the enhanced heat exchange turbulence column mixes with the fluid flowing from the right side of the enhanced heat exchange turbulence column into the column space 4 and out of the column space 4, further forming complex turbulence, thereby increasing the degree of fluid turbulence and thus improving the heat exchange and cooling effect.

[0035] In addition, the three torsion columns 1 have a large contact area with the fluid, which can quickly exchange heat with the fluid to improve the heat exchange and cooling effect.

[0036] In some embodiments, such as Figure 4 and Figure 5 As shown, the torsion column 1 includes a first torsion column 11 and a second torsion column 12. The first torsion column 11 and the second torsion column 12 have opposite spiral directions. Optionally, the first torsion column 11 spirals counterclockwise from bottom to top, and the second torsion column 12 spirals clockwise from bottom to top. When the fluid flows through the first torsion column 11 and the second torsion column 12, it forms a spiral turbulence around the column with opposite directions and disturbs each other, further enhancing the turbulence of the fluid and thus improving the heat exchange and cooling effect.

[0037] In some embodiments, such as Figure 4 and Figure 5 As shown, at least two first torsion columns 11 are arranged circumferentially along the virtual axis, and at least two second torsion columns 12 are arranged circumferentially along the virtual axis. The at least two first torsion columns 11 and at least two second torsion columns 12 are arranged in a grid pattern. The intercolumn channel 3 between adjacent first torsion columns 11 is separated by the second torsion columns 12, and the intercolumn channel 3 between adjacent second torsion columns 12 is separated by the first torsion columns 11, thereby dividing the intercolumn channel 3 into mesh. Fluid enters and exits the column space 4 through the mesh to further enhance the turbulence of the fluid and thus improve the heat exchange and cooling effect.

[0038] The length and number of the first torsion column 11 and the second torsion column 12 can be adjusted according to design requirements, as follows: Figure 4 The density and length states shown, and as... Figure 5 The density and length states are shown.

[0039] Optionally, the first torsion column 11 and the second torsion column 12 are both arranged in a circumferentially spaced manner, with at least three columns, to achieve a stronger degree of turbulence and thus a better heat exchange and cooling effect.

[0040] It is understood that the first torsion column 11 and the second torsion column 12 are not limited to being arranged in a grid pattern. In other embodiments, at least two first torsion columns 11 are arranged circumferentially at intervals along the virtual axis and surround the outer periphery of at least two second torsion columns 12 arranged circumferentially at intervals along the virtual axis, and the first torsion columns 11 and the second torsion columns 12 are spaced apart.

[0041] In some embodiments, the cross-section of the torsion column 1 is circular or polygonal.

[0042] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the cross-section of the torsion column 1 is circular to provide a high guiding effect for the fluid.

[0043] like Figure 3 As shown, the cross-section of the torsion column 1 is polygonal, but it can also be triangular, rectangular, rhomboid, pentagonal, hexagonal, etc. Rectangular can be selected to have a better segmentation effect on the fluid.

[0044] like Figures 6-8 As shown, the turbine blade of this embodiment includes a cooling chamber and a turbulence column for enhanced heat transfer.

[0045] The heat exchange-enhancing turbulence column is located inside the cooling chamber and connected between the two chamber walls 2 that are opposite to each other in the cooling chamber.

[0046] Optionally, such as Figure 6 As shown, the cooling chamber has two chamber walls 2 arranged opposite each other in the vertical direction, with the upper one being the first chamber wall 21 and the lower one being the second chamber wall 22. The cooling chamber is formed between the first chamber wall 21 and the second chamber wall 22. A heat-enhancing turbulence column is vertically arranged and connected between the first chamber wall 21 and the second chamber wall 22 to create turbulence in the fluid within the cooling chamber, thereby heat-exchanging and cooling the turbine blades. The number of heat-enhancing turbulence columns can be multiple, and the heat-enhancing turbulence columns can be, for example... Figures 1-5 Any of the examples shown can be selected as follows: Figure 2 The example shown.

[0047] The turbine blade of this invention, by setting the heat-enhancing turbulence column of this invention in the cooling chamber, generates complex turbulence in the fluid of the cooling chamber to achieve a better heat exchange and cooling effect, thereby enabling the turbine blade to have a lower temperature to extend its service life and to be suitable for higher ambient temperatures.

[0048] In some embodiments, such as Figure 7 As shown, the turbulence column for enhanced heat transfer is configured along the first direction (e.g., Figure 7At least two rows (as shown in the vertical direction) are arranged at intervals, and optionally multiple rows, each row including rows arranged along a second direction (such as...). Figure 7 Multiple heat-enhancing turbulence columns are arranged at intervals in the left-right direction (as shown). In two adjacent rows of heat-enhancing turbulence columns, multiple heat-enhancing turbulence columns in one row are arranged alternately with multiple heat-enhancing turbulence columns in the other row.

[0049] When a fluid, which can be selected as cooling gas, is supplied to the cooling chamber, such as Figure 8 As shown, the fluid flows from bottom to top, first forming turbulence at the lower heat-enhancing turbulence column, and can also be turbulent from the windward side of the heat-enhancing turbulence column (such as...). Figure 8 The lower side (as shown) flows into the column space 4 from the inter-column channel 3, and then onto the leeward side of the heat-enhancing turbulence column (such as...). Figure 8 (As shown above) flows out from the intercolumn channel 3.

[0050] The fluid discharged from the upper left side mixes with the circumferentially flowing fluid and reaches the upper left row of the enhanced heat exchange turbulence column below the enhanced heat exchange turbulence column, where further turbulence is formed. Similarly, the fluid discharged from the upper right side mixes with the circumferentially flowing fluid and reaches the upper right row of the enhanced heat exchange turbulence column below the enhanced heat exchange turbulence column, where further turbulence is formed.

[0051] The fluid discharged to the left mixes with the circumferentially flowing fluid, and then impacts and mixes with the fluid discharged to the right from the same row of the enhanced heat transfer turbulence column on the left, further increasing the turbulence level before reaching the enhanced heat transfer turbulence column in the upper left of the next row below it. The fluid discharged to the right mixes with the circumferentially flowing fluid, and then impacts and mixes with the fluid discharged to the left from the same row of the enhanced heat transfer turbulence column on the right, further increasing the turbulence level before reaching the enhanced heat transfer turbulence column in the upper right of the next row below it.

[0052] The upward-discharged fluid, after being impacted and mixed with the fluids converging on the left and right sides of the circumferential direction, is then impacted and mixed with the fluids discharged to the right from the upper left of the next row of the enhanced heat exchange turbulence column and the fluids discharged to the left from the upper right of the next row of the enhanced heat exchange turbulence column. After reaching the enhanced heat exchange turbulence column in the third row, which is located directly above the enhanced heat exchange turbulence column, the fluid undergoes two impacts and mixing within the space surrounded by the four enhanced heat exchange turbulence columns, thereby increasing the degree of turbulence and improving the heat exchange and cooling effect.

[0053] It is understood that in two adjacent rows of heat-enhancing turbulence columns, the multiple heat-enhancing turbulence columns in one row and the multiple heat-enhancing turbulence columns in the other row are not necessarily arranged alternately. In other embodiments, in two adjacent rows of heat-enhancing turbulence columns, the multiple heat-enhancing turbulence columns in one row and the multiple heat-enhancing turbulence columns in the other row are arranged one-to-one opposite each other. The fluid discharged from the heat-enhancing turbulence columns to the upper left, directly above, and upper right can all be selected to reach the heat-enhancing turbulence columns in the next row in the corresponding direction.

[0054] In some embodiments, the portion of the cooling chamber with the turbulence column for enhanced heat transfer is located at the tail end of the turbine blade and / or between the double walls of the blade, so as to have a higher cooling effect on the turbine blade.

[0055] The gas turbine of this invention includes the turbine blades of this invention.

[0056] The gas turbine of this invention can operate under higher temperature conditions by employing the turbine blades of this invention.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A turbulence column for enhanced heat transfer, characterized in that, Includes a torsion column (1), which is a spiral shape that surrounds and extends along the virtual axis, and the torsion column (1) is configured to be at least two collinear with the virtual axis.

2. The turbulence column for enhanced heat transfer according to claim 1, characterized in that, The at least two of the torsion columns (1) have the same spiral direction and abut against each other.

3. The turbulence column for enhanced heat transfer according to claim 1, characterized in that, The at least two of the torsion columns (1) have the same helical direction and are arranged circumferentially at intervals along the virtual axis.

4. The turbulence column for enhanced heat transfer according to claim 1, characterized in that, The torsion column (1) includes a first torsion column (11) and a second torsion column (12), with the first torsion column (11) and the second torsion column (12) having opposite spiral directions.

5. The turbulence column for enhanced heat transfer according to claim 4, characterized in that, The first torsion column (11) consists of at least two circumferentially spaced columns arranged along the virtual axis, and the second torsion column (12) consists of at least two circumferentially spaced columns arranged along the virtual axis. The at least two first torsion columns (11) and the at least two second torsion columns (12) are arranged in a grid pattern.

6. The turbulence column for enhanced heat transfer according to any one of claims 1-5, characterized in that, There are at least three torsion columns (1) with the same helical direction.

7. The turbulence column for enhanced heat transfer according to any one of claims 1-5, characterized in that, The cross-section of the torsion column (1) is circular or polygonal.

8. A turbine blade, characterized in that, It includes a cooling chamber and a heat-enhancing turbulence column as described in any one of claims 1-7, wherein the heat-enhancing turbulence column is located inside the cooling chamber and connected between two chamber walls (2) disposed opposite to each other in the cooling chamber.

9. The turbine blade according to claim 8, characterized in that, The heat exchange enhancement turbulence columns are arranged in at least two rows at intervals along a first direction, each row including a plurality of heat exchange enhancement turbulence columns at intervals along a second direction, wherein in two adjacent rows of heat exchange enhancement turbulence columns, a plurality of heat exchange enhancement turbulence columns in one row are alternately arranged with a plurality of heat exchange enhancement turbulence columns in the other row.

10. A gas turbine, characterized in that, Including the turbine blade as described in claim 8 or 9.

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