Divergent cooling combustion chamber transition section

Abstract

This invention provides a divergent cooling combustion chamber transition section. The transition section includes a transition section body and a lattice. The wall surface of the transition section body is provided with several rows of cooling holes, which are spaced apart along the direction of gas flow within the inner cavity of the transition section body. Each row of cooling holes includes multiple cooling holes spaced apart circumferentially on the transition section body. The lattice is disposed within the cooling holes to generate turbulence in the cooling gas flowing within them. The divergent cooling combustion chamber transition section of this invention, by placing a lattice within the cooling holes, enhances the suction force at the cooling holes and improves the heat exchange efficiency and gas film uniformity through the turbulence effect of the lattice.

Description

Technical Field

[0001] This invention relates to the field of gas turbines, and more specifically to a diffuse cooling combustion chamber transition section. Background Technology

[0002] A gas turbine mainly consists of three components: a compressor, a combustion chamber, and a turbine. Compressed air generated by the compressor is discharged into the combustion chamber and mixed with fuel for combustion. The resulting high-temperature combustion gas is transported to the turbine through a transition section in the combustion chamber to perform work. In related technologies, the transition section of the combustion chamber is cooled using a divergent cooling method. In other words, cooling holes are installed in the transition section, and external cooling air is drawn into the transition section by the pressure difference between the inside and outside of the transition section. As the cooling air passes through the cooling holes, it exchanges heat with the hole walls to cool down. After entering the transition section, the cooling air forms a gas film adhering to the inner wall of the transition section, thus blocking the high-temperature combustion gas. However, because the cooling air passes directly through the cooling holes, and the cooling holes are relatively short, the suction force formed in this technology is relatively small, the heat exchange efficiency is low, and the gas film is uneven. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art. To this end, embodiments of the present invention propose a divergent cooling combustion chamber transition section, in which a lattice is provided within the cooling holes. The lattice enhances the suction force at the cooling holes and improves the heat exchange efficiency and uniformity of the cooling gas film through the turbulence effect of the lattice.

[0004] The transition section of the divergent cooling combustion chamber in this embodiment of the invention includes:

[0005] The transition section body has several rows of cooling holes on its wall surface. The several rows of cooling holes are arranged at intervals along the direction of gas flow in the inner cavity of the transition section body. Each row of cooling holes includes a plurality of cooling holes arranged at intervals in the circumferential direction of the transition section body.

[0006] A crystal lattice is disposed within the cooling hole to cause turbulence in the cooling gas flowing within the cooling hole.

[0007] In this embodiment of the invention, a lattice is provided in the cooling hole of the transition section of the divergent cooling combustion chamber. By occupying part of the space of the cooling hole, the cross-sectional area of ​​the cooling hole is reduced, thereby increasing the suction force at the cooling hole. At the same time, the cooling gas flowing in the cooling hole will generate turbulence when passing through the lattice, thereby increasing the residence time of the cooling gas in the cooling hole and increasing the complexity of the cooling gas flow path, so as to enhance the heat exchange and cooling effect of the cooling gas. In addition, the cooling gas with turbulence is more divergent when it enters the inner cavity of the combustion chamber transition section from the cooling hole, thereby improving the uniformity of the gas film and improving the effect of blocking high-temperature combustion gas in the inner cavity.

[0008] In some embodiments, the lattice completely fills the cooling hole.

[0009] In some embodiments, the lattice body includes a plurality of sublattices, wherein at least a portion of the sublattices are sequentially connected in a row along the axial direction of the cooling holes.

[0010] In some embodiments, the lattice body has a plurality of sublattices on the cross-section of the cooling hole, and each sublattice on the cross-section corresponds to a row of sublattices.

[0011] In some embodiments, the cross-sectional shape of the lattice is a circle that matches the cross-sectional shape of the cooling hole.

[0012] In some embodiments, the sublattice includes a plurality of main baffles, at least one end of each main baffle is a connecting portion, all the connecting portions of the sublattice are located on the same virtual polyhedron, and the connecting portions are used to connect the hole wall of the cooling hole and / or another sublattice.

[0013] In some embodiments, the virtual polyhedron is a hexahedron.

[0014] In some embodiments, one end of the main spoiler is the connecting portion, and the other end of the main spoiler is connected to at least one of the other main spoilers.

[0015] In some embodiments, both ends of the main spoiler are the connecting portions. There are multiple groups of main spoilers, and each group of main spoilers includes multiple main spoilers. One end of all the main spoilers in the same group is connected. In two adjacent groups of main spoilers, at least a portion of the other end of the main spoilers in one group is connected to at least a portion of the other end of the main spoilers in the other group in a one-to-one correspondence.

[0016] In some embodiments, the sublattice further includes a plurality of secondary spoilers connected between two of the main spoilers, or connected between the main spoilers and at least one of the other secondary spoilers. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the transition section of the divergent cooling combustion chamber according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle;

[0019] Figure 3 This is a schematic diagram of the structure of the first embodiment of the sublattice in this invention;

[0020] Figure 4 This is a schematic diagram of the structure of a second embodiment of the sublattice in this invention;

[0021] Figure 5 This is a schematic diagram of the structure of the third embodiment of the sublattice in this invention;

[0022] Figure 6 This is a schematic diagram of the structure of the fourth embodiment of the sublattice in this invention;

[0023] Figure 7 This is a schematic diagram of the structure of the fifth embodiment of the sublattice in this invention;

[0024] Figure 8 This is a schematic diagram of the sixth embodiment of the sublattice in the present invention;

[0025] Figure 9 This is a schematic diagram of the structure of the first embodiment of the crystal lattice in this invention;

[0026] Figure 10 This is a schematic diagram of the structure of a second embodiment of the lattice in this invention.

[0027] Figure label:

[0028] 1. Transition section body; 11. Cooling hole; 2. Crystal lattice; 21. Sub-crystal lattice; 22. Main baffle bar; 221. First main baffle bar; 222. Second main baffle bar; 23. Connecting part; 24. Secondary baffle bar. Detailed Implementation

[0029] 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.

[0030] The following is for reference. Figures 1-10 The transition section of the divergent cooling combustion chamber according to an embodiment of the present invention is described.

[0031] like Figures 1-10As shown, the transition section of the divergent cooling combustion chamber in this embodiment of the invention includes a transition section body 1 and a lattice body 2.

[0032] The wall surface of the transition section body 1 is provided with several rows of cooling holes 11. The several rows of cooling holes 11 are arranged at intervals along the direction of gas flow in the inner cavity of the transition section body 1. Each row of cooling holes 11 includes multiple cooling holes 11 arranged at intervals around the circumference of the transition section body 1. A lattice body 2 is disposed in the cooling holes 11 to generate turbulence in the cooling gas flowing in the cooling holes 11.

[0033] like Figure 1 and Figure 2 As shown, the transition section body 1 is preferably an irregular annular shell, and the high-temperature gas passes through the inner cavity of the transition section body 1. Preferably, as shown... Figure 1 As shown, the inner cavity of the transition section body 1 extends from the upper left to the lower right. Multiple rows of cooling holes 11 are provided within the wall of the annular shell. These rows of cooling holes 11 are spaced apart along the direction of gas flow within the inner cavity of the transition section body 1. Each row of cooling holes 11 includes multiple cooling holes 11 spaced apart around the circumference of the transition section body 1. The cooling holes 11 penetrate the wall of the annular shell to connect the inner cavity of the transition section body 1 with the outside. Under the pressure difference between the inner cavity of the transition section body 1 and the outside, cooling gas from the outside is drawn into the cooling holes 11, then enters the inner cavity of the transition section body 1 through the cooling holes 11, forming a gas film attached to the inner wall of the transition section body 1. The gas film formed by all the cooling gas discharged from the cooling holes 11 connects with and covers the inner wall of the transition section body 1, thus blocking the high-temperature combustion gas within the inner cavity of the transition section body 1.

[0034] A lattice body 2 is disposed within the cooling hole 11. By occupying part of the space in the cooling hole 11, the lattice body 2 reduces the cross-sectional area of ​​the cooling hole 11, thereby increasing the suction force at the opening formed by the cooling hole 11 on the outer wall of the transition section body 1. This allows the cooling gas to enter the cooling hole 11 and the transition section body 1 more quickly, thus improving the cooling effect through the rapid flow of the cooling gas. The lattice body 2 has multiple turbulence sections, forming a flow channel between adjacent turbulence sections. When the cooling gas flows within the cooling hole 11, it passes through the flow channel of the lattice body 2 and generates turbulence as it passes through the lattice body 2. This increases the residence time of the cooling gas within the cooling hole 11 and increases the complexity of the cooling gas flow path, thereby enhancing the heat exchange and cooling effect between the cooling gas and the hole wall of the cooling hole 11. At the same time, the turbulent cooling gas becomes more dispersed when it enters the inner cavity of the transition section body 1 from the cooling hole 11, thus forming a more uniform gas film and improving the effect of blocking high-temperature combustion gases in the inner cavity.

[0035] In this embodiment of the invention, a lattice is provided in the cooling hole of the transition section of the divergent cooling combustion chamber. By occupying part of the space of the cooling hole, the cross-sectional area of ​​the cooling hole is reduced, thereby increasing the suction force at the cooling hole. At the same time, the cooling gas flowing in the cooling hole will generate turbulence when passing through the lattice, thereby increasing the residence time of the cooling gas in the cooling hole and increasing the complexity of the cooling gas flow path, so as to enhance the heat exchange and cooling effect of the cooling gas. In addition, the cooling gas with turbulence is more divergent when it enters the inner cavity of the combustion chamber transition section from the cooling hole, thereby improving the uniformity of the gas film and improving the effect of blocking high-temperature combustion gas in the inner cavity.

[0036] In some embodiments, the lattice 2 completely fills the cooling hole 11.

[0037] like Figure 2 As shown, the wall of the cooling hole 11 is connected to the crystal lattice 2, and the length of the crystal lattice 2 is consistent with and matches the length of the cooling hole 11. The cooling gas is always located within the crystal lattice 2 when it is in the cooling hole 11, thereby enhancing the heat exchange and cooling effect of the cooling gas.

[0038] It is understood that the lattice is not limited to completely filling the cooling hole. In other embodiments, the length of the lattice is less than the length of the cooling hole, and the lattice is located at the entrance or opening of the cooling hole.

[0039] In some embodiments, the lattice 2 includes a plurality of sublattices 21, wherein at least some of the sublattices 21 are sequentially connected in a row along the axial direction of the cooling hole 11.

[0040] like Figure 2 and Figure 9 As shown, the crystal lattice 2 includes a plurality of sub-lattices 21, wherein at least some of the sub-lattices 21 are sequentially connected in rows along the axial direction of the cooling hole 11. In other words, the crystal lattice 2 includes several rows of sub-lattices 21, and each row of sub-lattices 21 includes a plurality of sub-lattices 21 sequentially connected along the extending direction of the cooling hole 11. Figure 9 In the embodiment shown, the crystal lattice 2 is a row of sub-lattices 21.

[0041] Each sub-lattice 21 has multiple turbulence sections and flow channels. Therefore, each sub-lattice 21 plays a turbulence role on the passing cooling gas. When the cooling gas flows in the cooling hole 11, it passes through multiple sub-lattices 21 in sequence. Turbulence is generated when passing through each sub-lattice 21, thereby effectively increasing the residence time of the cooling gas in the cooling hole and effectively increasing the complexity of the cooling gas flow path.

[0042] In some embodiments, the lattice body 2 has a plurality of sub-lattices 21 on the cross-section of the cooling hole 11, and each sub-lattice 21 on the cross-section corresponds to a row of sub-lattices 21.

[0043] like Figure 2 and Figure 10As shown, the lattice body 2 has multiple sub-lattices 21 on the cross-section of the cooling hole 11. Each sub-lattice 21 on the cross-section corresponds to a row of sub-lattices 21. In other words, the lattice body 2 has multiple rows of sub-lattices 21. The multiple rows of sub-lattices 21 are connected and arranged in the transverse direction of the cooling hole 11 to completely fill the cross-section of the cooling hole 11.

[0044] Since each sub-lattice 21 has a turbulent effect on the passing cooling gas, the cooling gas is simultaneously subjected to the turbulent effect of multiple sub-lattices 21 on the cross-section of the cooling hole 11, thereby further increasing the residence time of the cooling gas in the cooling hole and further increasing the complexity of the cooling gas flow path.

[0045] Multiple sublattices 21 on the cross-section can be arranged along a straight line or in an array. In other words, multiple rows of sublattices 21 can be arranged as a single layer or as multiple layers. The sublattices 21 employ... Figure 4 In the embodiment shown, when the cooling hole 11 is set as a single layer, the average number of Nusselts increases by 28%-32%, which can reduce the wall temperature of the transition section body 1 by 8°C-12°C. When the lattice 2 is a three-layer sub-lattice 21, the average number of Nusselts of the cooling hole 11 increases by 58%-62%, which can reduce the wall temperature of the transition section body 1 by 18°C-22°C. Therefore, as the number of sub-lattice 21 layers of the lattice 2 increases, the average number of Nusselts of the cooling hole 11 and the reduction in wall temperature of the transition section body 1 both increase.

[0046] Meanwhile, since the crystal lattice 2 is composed of multiple sub-lattices 21 connected together, the shape and volume of the sub-lattices 21 can be adjusted by changing the number and position of the sub-lattices 21, which facilitates the production, processing and installation of the crystal lattice 2.

[0047] In some embodiments, the cross-sectional shape of the lattice 2 is circular, matching the cross-sectional shape of the cooling hole 11. This facilitates the fabrication of the cooling hole 11 and the installation of the lattice 2, ensuring that the lattice 2 completely fills the cooling hole 11. Figure 10 As shown, the crystal lattice 2 is a multi-layered sub-lattice 21. The number of sub-lattices 21 varies in cross-section so that the cross-sectional shape of the crystal lattice 2 is circular. Preferably, the crystal lattice 2 is symmetrically arranged with respect to the axis of the cooling hole 11.

[0048] In some embodiments, the sublattice 21 includes a plurality of main baffles 22, at least one end of the main baffles 22 being a connecting portion 23, all connecting portions 23 of the sublattice 21 being located on the same virtual polyhedron, and the connecting portions 23 being used to connect the hole wall of the cooling hole 11 and / or another sublattice 21.

[0049] like Figures 3-8As shown, the sublattice 21 is a frame with multiple connecting parts 23. The rods constituting the frame serve as flow disturbance parts, and flow channels are formed between the rods. The frame has multiple connecting parts 23, which are located on the same virtual polyhedron. Specifically, the connecting parts 23 can be located at the vertices of the virtual polyhedron, the midpoints of the edges of the virtual polyhedron, or the faces of the virtual polyhedron. The virtual polyhedron is a hexahedron, an octahedron, or a dodecahedron, etc., preferably a hexahedron. The connecting part 23 is used to connect the hole wall surface of the cooling hole 11 and / or another sub-lattice 21 to fix the lattice body 2 inside the cooling hole 11. In other words, in the lattice body 2, the connecting parts 23 on the overlapping surfaces, edges or vertices of two adjacent sub-lattices 21 are connected to connect the two adjacent sub-lattices 21. The connecting part 23 located on the virtual outer wall surface of the lattice body 2 is connected to the hole wall surface of the cooling hole 11 to fix the lattice body 2 inside the cooling hole 11. There are some connecting parts 23 that simultaneously connect another connecting part 23 and the hole wall surface of the cooling hole 11.

[0050] The frame includes a main deflector bar 22, at least one end of which is a connecting part 23, so as to serve both deflection and installation functions.

[0051] It is understandable that when lattice 2 is a row of sublattices 21, the fact that the connecting portions 23 of the sublattices 21 are located on the same virtual polyhedron does not mean that the cross-section of lattice 2 is a polygonal cross-section of the virtual polyhedron. For example, when the virtual polyhedron is a hexahedron, the cross-section of lattice 2 is not limited to a rectangle. Figure 9 As shown, the connecting portion 23 of the lattice 2 can also be formed into a virtual cylinder to match the cross-sectional shape of the cooling hole 11.

[0052] It is understood that the sublattice is not limited to a framework; in other embodiments, the sublattice is a bulk material with multiple branch channels.

[0053] In some embodiments, one end of the main spoiler 22 is a connecting part 23, and the other end of the main spoiler 22 is connected to at least one of the other main spoilers 22.

[0054] exist Figure 3 , Figure 4 and Figure 5 In the illustrated embodiment, the main spoiler 22 is a straight rod, and multiple main spoilers 22 are arranged in a radiating pattern. One end of the main spoiler 22 is a connecting portion 23. Figure 3 In the illustrated embodiment, one portion of the connecting part 23 is located at the midpoint of the edge of the virtual polyhedron, and another portion of the connecting part 23 is located at the vertex of the virtual polyhedron. Figure 4 and Figure 5 In the embodiment shown, all connecting parts 23 are located at the vertices of the virtual polyhedron, and the other ends of all main spoiler rods 22 are located at the center of the virtual polyhedron and connected together.

[0055] In such Figure 7 In the illustrated embodiment, the main spoiler 22 includes a first main spoiler 221 and a second main spoiler 222. The second main spoilers 222 are arranged in pairs in the vertical direction. In the paired second main spoilers 222, one end of the second main spoiler 222 is a connecting part 23 located at the vertex of the virtual polyhedron, and the other ends of the second main spoilers 222 are connected to each other. Multiple pairs of second main spoilers 222 are provided, and the multiple pairs of second main spoilers 222 are arranged at intervals in the vertical direction.

[0056] In some embodiments, both ends of the main spoiler 22 are connecting portions 23. There are multiple groups of main spoiler 22, and each group of main spoiler 22 includes multiple main spoiler 22. One end of all the main spoiler 22 in the same group is connected. In two adjacent groups of main spoiler 22, at least a portion of the main spoiler 22 in one group is connected to at least a portion of the main spoiler 22 in the other group.

[0057] exist Figure 6 In the illustrated embodiment, the main spoiler 22 is a bent rod, with connecting portions 23 at both ends. Multiple sets of main spoilers 22 are provided, preferably two sets, arranged sequentially in a vertical direction. Each set includes multiple main spoilers 22, preferably four. The four main spoilers 22 in the upper set correspond one-to-one with the four main spoilers 22 in the lower set.

[0058] Four main spoiler bars 22 in the same group are connected at one end and located at the center of the corresponding face of the virtual polyhedron. Specifically, the top ends of the four main spoiler bars 22 in the upper group are connected and located at the center of the top face of the virtual polyhedron, and the bottom ends of the four main spoiler bars 22 in the lower group are connected and located at the center of the bottom face of the virtual polyhedron. The other ends of two corresponding main spoiler bars 22 are connected and located at the center of the corresponding face of the virtual polyhedron. Specifically, the other ends of the four main spoiler bars 22 in the same group extend forward, backward, left, and right respectively. In two groups of main spoiler bars 22, the other ends of two main spoiler bars 22 extending in the same direction and correspondingly located are connected and located at the center of the corresponding directional face of the virtual polyhedron. Therefore, one end of a main spoiler bar 22 connects to multiple main spoiler bars 22, and the other end of a main spoiler bar 22 connects to one main spoiler bar 22. Both ends of the main spoiler bar 22 are connecting parts 23. It can be understood that the number of main spoiler bars is not limited to two groups.

[0059] In some embodiments, the sublattice 21 further includes a plurality of secondary spoilers 24, which are connected between two main spoilers 22, or between the main spoilers 22 and at least one of the other secondary spoilers 24.

[0060] The frame also includes a secondary baffle rod 24, which serves as a connection and support as well as a baffle within the sub-lattice 21. However, the secondary baffle rod 24 is not connected to the wall of the cooling hole 11 or the other sub-lattice 21.

[0061] In such Figure 5 In the embodiment shown, the secondary spoiler 24 extends in the left-right direction and connects between two adjacent main spoiler 22 in the left-right direction.

[0062] In such Figure 7 In the illustrated embodiment, a secondary spoiler 24 located at the bottom is connected between two main spoiler 22 connected at the front end and two main spoiler 22 connected at the rear end. Both ends of the remaining secondary spoiler 24 are connected to the corresponding main spoiler 22. Preferably, one end of the secondary spoiler 24 is connected to one main spoiler 22, and the other end of the secondary spoiler 24 is connected to the two main spoiler 22.

[0063] In such Figure 8 In the embodiment shown, the other ends of the three main spoiler rods 22 are connected, and the connection part 23 of the three main spoiler rods 22 is located on different edges of the virtual polyhedron. One end of the secondary spoiler rod 24 is connected to the other end of the three main spoiler rods 22 at the same time. The other end of the secondary spoiler rod 24 extends to the center of the virtual polyhedron, and the other ends of all the secondary spoiler rods 24 are connected.

[0064] As the number and arrangement complexity of the main and secondary baffles 22 and the secondary baffles 24 vary, the increase in the average Nusselt number of the corresponding cooling holes 11 and the reduction in the wall temperature of the transition section body 1 also vary. The higher the arrangement complexity of the main and secondary baffles 22 and the secondary baffles 24, the stronger the turbulence effect, and the higher the increase in the average Nusselt number of the corresponding cooling holes 11 and the reduction in the wall temperature of the transition section body 1.

[0065] When sublattice 21 is set as one layer Figure 3 The illustrated embodiments to Figure 8 The average number of Nusselts for the corresponding cooling holes 11 in the embodiments shown increases by 18%-22%, 28%-32%, 38%-42%, 23%-27%, 48%-52%, and 53%-57%, respectively, which corresponds to a reduction in the wall temperature of the transition section body 1 by 5℃-9℃, 8℃-12℃, 13℃-17℃, 10℃-14℃, 18℃-22℃, and 20℃-24℃, respectively.

[0066] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0067] Furthermore, the terms "first" and "second" are used only for distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A diverging-cooled combustor transition section characterized by, include: Transition segment body (1) and lattice (2); The wall surface of the transition section body (1) is provided with several rows of cooling holes (11). The several rows of cooling holes (11) are arranged at intervals along the direction of gas flow in the inner cavity of the transition section body (1). Each row of cooling holes (11) includes a plurality of cooling holes (11) arranged at intervals in the circumferential direction of the transition section body (1). The lattice (2) is disposed in the cooling hole (11) to cause turbulence in the cooling gas flowing in the cooling hole (11); The lattice (2) completely fills the cooling hole (11); The lattice (2) includes a plurality of sublattices (21), wherein at least a portion of the sublattices (21) are sequentially connected in a row along the axial direction of the cooling hole (11); The lattice (2) has a plurality of sub-lattices (21) on the cross-section of the cooling hole (11), and each sub-lattice (21) on the cross-section corresponds to a row of sub-lattices (21). The cross-sectional shape of the lattice (2) is a circle that matches the cross-sectional shape of the cooling hole (11); The sublattice (21) includes a plurality of main flow-dispersing rods (22), at least one end of the main flow-dispersing rod (22) is a connecting part (23), all the connecting parts (23) of the sublattice (21) are located on the same virtual polyhedron, and the connecting part (23) is used to connect the hole wall of the cooling hole (11) and / or another sublattice (21). The virtual polyhedron is a hexahedron.

2. The diverging-cooled combustor transition according to claim 1, wherein, One end of the main spoiler (22) is the connecting part (23), and the other end of the main spoiler (22) is connected to at least one of the other main spoilers (22).

3. The diverging-cooled combustor transition according to claim 1, wherein, Both ends of the main spoiler (22) are the connecting parts (23). There are multiple groups of main spoilers (22), and each group of main spoilers (22) includes multiple main spoilers (22). One end of all the main spoilers (22) in the same group is connected. In two adjacent groups of main spoilers (22), at least a portion of the other end of the main spoilers (22) in one group is connected to at least a portion of the other end of the main spoilers (22) in the other group.

4. The diverging-cooled combustor transition according to claim 1, wherein, The sublattice (21) also includes a plurality of secondary spoilers (24), which are connected between two of the main spoilers (22) or between the main spoilers (22) and at least one of the other secondary spoilers (24).

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