Flame tube wall plate, flame tube and gas turbine combustion chamber

Abstract

The present disclosure relates to a flame tube wall plate, which comprises: a wall plate body, forming a cylindrical structure; and a plurality of first diverging holes, formed on the wall plate body at even intervals along the circumferential direction; a plurality of first diverging holes located at the same axial length position of the wall plate body form a first diverging hole array, and the plurality of first diverging hole arrays are arranged in sequence along the axial direction of the wall plate body, so as to form a swirl flow in the wall plate body. The present disclosure also provides a flame tube formed by using the flame tube wall plate and a gas turbine combustion chamber provided with the flame tube.

Description

Technical Field

[0001] The present disclosure relates to the technical field of gas turbine combustion chambers, and in particular to a flame tube wall plate, a flame tube and a gas turbine combustion chamber. Background Art

[0002] Divergent cooling is one of the commonly used cooling methods for the flame tube of the combustion chamber. The main principle of divergent cooling is that the cooling air first exchanges heat with the outer wall of the flame tube in the air inlet ring cavity, then enters the divergent hole for convection heat exchange, and finally is ejected from the divergent hole to form a cooling air film, which blocks the heat exchange between the high-temperature flue gas and the flame tube.

[0003] At present, the cooling contribution of the intake annular cavity convection heat transfer and the hole convection heat transfer in the combustion chamber divergent cooling is relatively small, and the most important part is the protective effect of the cooling air film. However, the effectiveness of the cooling air film depends greatly on the degree of adhesion of the air film to the wall and the interaction between the mainstream smoke and the cooling air film. If the adhesion of the cooling air film to the wall can be improved, it will be beneficial to improve the cooling efficiency of the flame tube. Summary of the invention

[0004] In view of the existing technical problems, the present disclosure provides a flame tube wall panel, a flame tube and a gas turbine combustion chamber, which are used to at least partially solve the above technical problems.

[0005] According to one aspect of an embodiment of the present disclosure, there is provided a flame tube wall panel, comprising: a plurality of first diverging holes formed on the wall panel body at even intervals along the circumferential direction; a plurality of first diverging holes located at the same axial length position of the wall panel body form a first diverging hole array, and the plurality of first diverging hole arrays are arranged sequentially along the axial direction of the wall panel body to form a swirl flow within the wall panel body.

[0006] According to an embodiment of the present disclosure, the first diverging hole is formed through the wall panel body; the tangential distance of the first diverging hole is less than or equal to 2 mm, and the compound angle of the first diverging hole is 65 to 85 degrees; wherein the tangential distance is characterized by the distance between the plane where the first diverging hole is located and the top of the arc of the wall panel body, and the compound angle is characterized by the angle between the airflow and the axis of the first diverging hole.

[0007] According to an embodiment of the present disclosure, the aperture of the first diverging hole is 0.5 to 2 mm.

[0008] According to an embodiment of the present disclosure, the spacing between each of the first diverging hole arrays and an adjacent first diverging hole array located upstream along the axial direction of the wall panel body is less than or equal to the spacing between the same first diverging hole array and an adjacent first diverging hole array located downstream along the axial direction of the wall panel body, wherein the upstream is characterized as the portion through which the airflow in the wall panel body passes first, and the downstream is characterized as the portion through which the airflow in the wall panel body passes later.

[0009] According to an embodiment of the present disclosure, the spacing between each of the first diverging hole arrays and the adjacent first diverging hole array located upstream along the axial direction of the wall panel body is smaller than the spacing between the same first diverging hole array and the adjacent first diverging hole array located downstream along the axial direction of the wall panel body.

[0010] According to an embodiment of the present disclosure, a distance between two adjacent first diverging hole arrays along the axial direction of the wall panel body is less than or equal to 25 mm.

[0011] According to an embodiment of the present disclosure, the flame wall panel also includes: a plurality of second diverging holes, each of the second diverging holes includes: a main hole, which is formed through the wall panel body; and a secondary hole, the axial first end of the secondary hole is formed in the middle of the main hole, the axial second end of the secondary hole is connected to the inner wall of the wall panel body, and the angle formed by the secondary hole and the main hole is an acute angle; wherein, the second diverging holes are formed on the wall panel body at uniform intervals along the circumferential direction, and a plurality of second diverging holes located at the same axial length position of the wall panel body form a second diverging hole array, the second diverging hole array is located at the upstream position of the airflow in the wall panel body of the first diverging hole array, and the plurality of second diverging hole arrays are arranged sequentially along the axial direction of the wall panel body, so as to eliminate the lifting vortex formed by the airflow in the wall panel body downstream of the second diverging hole array.

[0012] According to an embodiment of the present disclosure, the tangential distance of the main hole is less than or equal to 2 mm, and the compound angle of the main hole is 65 to 85 degrees; wherein the tangential distance is characterized by the distance between the plane where the main hole is located and the arc top of the wall panel body, and the compound angle is characterized by the angle between the airflow and the axis of the main hole.

[0013] According to an embodiment of the present disclosure, the angle formed by the secondary hole and the main hole is 10 to 20 degrees.

[0014] According to an embodiment of the present disclosure, the axial first end of the secondary hole is formed between the inner wall of the wall plate body and the midpoint of the axial position of the primary hole.

[0015] According to an embodiment of the present disclosure, the inner diameter of the secondary hole is smaller than or equal to the inner diameter of the main hole.

[0016] According to an embodiment of the present disclosure, the inner diameter of the main hole is 0.5 to 2 mm, and the inner diameter of the secondary hole is 0.5 to 1 mm.

[0017] According to an embodiment of the present disclosure, a circumferential spacing between adjacent second diverging holes in the same second diverging hole array is less than or equal to 10 times the aperture of the main hole.

[0018] According to an embodiment of the present disclosure, the number of the second diverging hole arrays is 3 to 5.

[0019] According to an embodiment of the present disclosure, a spacing between two adjacent second diverging hole arrays along the axial direction of the wall panel body is 4 to 12 mm.

[0020] According to another aspect of an embodiment of the present disclosure, a flame tube is provided, which is formed by using a flame tube wall panel.

[0021] According to an embodiment of the present disclosure, the flame tube further includes a cap formed on the air intake side of the flame tube wall panel.

[0022] According to an embodiment of the present disclosure, the flame tube further includes a wall panel body forming a cylindrical structure; a plurality of second diverging holes formed on the wall panel body; and a plurality of first diverging holes formed on the wall panel body.

[0023] According to an embodiment of the present disclosure, a plurality of first diverging holes located at the same axial length position of the wall panel body form a first diverging hole array; a plurality of second diverging holes located at the same axial length position of the wall panel body form a second diverging hole array; the second diverging hole array is located at an upstream position of the airflow in the wall panel body of the first diverging hole array; the upstream position is characterized as the part through which the airflow in the wall panel body passes first.

[0024] According to still another aspect of an embodiment of the present disclosure, a gas turbine combustion chamber is provided, wherein a flame tube is disposed in the gas turbine combustion chamber.

[0025] According to one aspect of the flame tube wall plate provided by the present disclosure, the first diverging hole is used to form a swirl flow, so that the cooling air film has a better wall adhesion effect, which is beneficial to improving the cooling efficiency of the flame tube.

[0026] According to another aspect of the present disclosure, the flame tube provided has the advantages of the flame tube wall panel and is conducive to the formation of a cooling air film.

[0027] According to another aspect of the present disclosure, the combustion chamber provided has the advantages of a flame tube. Under the same use conditions, the combustion chamber can effectively extend its service life due to its better cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a structural schematic diagram of a flame tube wall panel of an exemplary embodiment of the present disclosure;

[0029] Figure 2 yes Figure 1 A schematic diagram of the structure of the exemplary embodiment shown in the figure from a right perspective;

[0030] Figure 3 is a schematic structural diagram of a second diverging hole portion in an exemplary embodiment of the present disclosure;

[0031] Figure 4 yes Figure 1 A partial cross-sectional view in the radial direction of the wall panel body portion in the exemplary embodiment shown;

[0032] Figure 5 yes Figure 4 A partial cross-sectional view taken along line AA in the illustrated exemplary embodiment;

[0033] Figure 6 is a structural schematic diagram of a flame tube according to another exemplary embodiment of the present disclosure; and

[0034] Figure 7 is a schematic structural diagram of a combustion chamber according to another exemplary embodiment of the present disclosure.

[0035] Reference numerals

[0036] 1. The first divergent hole;

[0037] 2. The second divergent hole;

[0038] 21. Main hole;

[0039] 22. Secondary hole;

[0040] 3. Wall panel body;

[0041] 4. Hood;

[0042] 5. Gates; and

[0043] 6. Gas turbine combustion chamber. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0045] Unless otherwise defined, the technical terms or scientific terms used in this disclosure should be understood by ordinary technicians in the field. "First", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0046] The description of the disclosed structural embodiments and methods is disclosed herein. It should be understood that this is not intended to limit the disclosure to the specific disclosed embodiments, and the disclosure can be implemented by using other features, elements, methods and embodiments. Similar elements in different embodiments are usually marked with similar numbers.

[0047] Figure 1 is a structural schematic diagram of a flame tube wall panel of an exemplary embodiment of the present disclosure; Figure 2 yes Figure 1 A schematic diagram of the structure of the exemplary embodiment shown in the figure from a right perspective; Figure 3 is a schematic structural diagram of a second diverging hole portion in an exemplary embodiment of the present disclosure; Figure 4 yes Figure 1 A partial cross-sectional view in the radial direction of the wall panel body portion in the exemplary embodiment shown; and Figure 5 yes Figure 4 A partial cross-sectional view taken along line AA in the illustrated exemplary embodiment.

[0048] In an exemplary embodiment of the present disclosure, Figure 1 and Figure 2 As shown, a flame tube wall panel is provided, including a plurality of first diverging holes 1 formed on the wall panel body 3 at even intervals along the circumferential direction. Further, a plurality of first diverging holes 1 located at the same axial length position of the wall panel body 3 form a first diverging hole array, and the plurality of first diverging hole arrays are arranged in sequence along the axial direction of the wall panel body 3, so as to form a swirl flow in the wall panel body 3.

[0049] According to an embodiment of the present disclosure, a first diverging hole 1 is formed through-through on the wall panel body 3; a tangential distance of the first diverging hole 1 is less than or equal to 2 mm, and a compound angle of the first diverging hole 1 is 65 to 85 degrees; wherein, the tangential distance is characterized by the distance between the plane where the first diverging hole 1 is located and the top of the arc of the wall panel body 3, and the compound angle is characterized by the angle between the airflow and the axis of the first diverging hole 1.

[0050] Furthermore, the tangential distance h of the first diverging holes 1 should be as small as possible, but due to the limitation of the processing technology and the material, 2 mm is taken as the maximum acceptable value of the tangential distance.

[0051] According to an embodiment of the present disclosure, the diameter of the first diverging holes 1 is 0.5 to 2 mm.

[0052] According to an embodiment of the present disclosure, the spacing between each first diverging hole array and an adjacent first diverging hole array located upstream along the axial direction of the wall panel body 3 is less than or equal to the spacing between the same first diverging hole array and an adjacent first diverging hole array located downstream along the axial direction of the wall panel body 3; wherein the upstream is characterized as the part that the airflow in the wall panel body 3 passes through first, and the downstream is characterized as the part that the airflow in the wall panel body 3 passes through later.

[0053] In detail, the intervals between every two adjacent first diverging hole arrays may be equal.

[0054] According to the embodiments of the present disclosure, Figure 2 As shown, the spacing 134 between each first diverging hole array and the adjacent first diverging hole array located upstream along the axial direction of the wall panel body 3 is smaller than the spacing 145 between the same first diverging hole array and the adjacent first diverging hole array located downstream along the axial direction of the wall panel body 3. Such a design is conducive to reducing the number of first diverging holes 1, and through the arrangement of dense front and sparse back, the formation position of the uniform cooling air film in the flame tube is closer to the upstream.

[0055] In detail, the growth amount of adjacent first divergent hole arrays should be 1.5 to 2, wherein the growth amount is characterized by a ratio of 145 / 134.

[0056] According to an embodiment of the present disclosure, a spacing between two adjacent first diverging hole arrays along the axial direction of the wall panel body 3 is less than or equal to 25 mm.

[0057] In detail, for the sake of limit thinking, the spacing between adjacent first diverging hole arrays will not increase infinitely, therefore, a limit value of the spacing between two adjacent first diverging hole arrays along the axial direction of the wall panel body 3 should be set. The limit value is characterized by that when the spacing between two adjacent first diverging hole arrays along the axial direction of the wall panel body 3 reaches the limit value, the spacing from this first diverging hole array to the adjacent downstream first diverging hole array along the axial direction of the wall panel body 3 is the above limit value. It should be understood that the embodiments of the present disclosure are not limited thereto.

[0058] For example, the above limit value is not limited to 25 mm, and any value between 20 and 25 mm can be selected.

[0059] Furthermore, the above limit value can be adaptively designed according to the axial length of the wall panel body 3.

[0060] According to the embodiment of the present disclosure, the positions of the first diffusion holes 1 in adjacent first diffusion hole arrays can be aligned or staggered, so as to form a cooling air film with as few first diffusion holes 1 and first diffusion hole arrays as possible. The aligned setting is characterized by the axial positions of the first diffusion holes 1 in each first diffusion hole array being aligned and arranged in a row on the surface of the wall panel body 3; the staggered setting is characterized by the positions of the first diffusion holes 1 other than the aligned setting.

[0061] Furthermore, the first diverging hole array and the second diverging hole array may also be arranged in alignment or in misalignment.

[0062] Furthermore, the number of the first diffusion holes 1 in each first diffusion hole array and the number of the second diffusion holes 2 in each second diffusion hole array can be set to be consistent or inconsistent.

[0063] According to an embodiment of the present disclosure, the flame tube wall panel also includes: a wall panel body 3 forming a cylindrical structure and a plurality of second diverging holes 2 formed on the wall panel body 3. Each second diverging hole 2 includes a main hole 21 and a secondary hole 22, wherein the main hole 21 is formed through the wall panel body 3, the axial first end of the secondary hole 22 is formed in the middle of the main hole 21, the axial second end of the secondary hole 22 is connected to the inner wall of the wall panel body 3, and the angle formed by the secondary hole 22 and the main hole 21 is an acute angle. Further, a plurality of second diverging holes 2 are formed on the wall panel body 3 at even intervals along the circumferential direction, and a plurality of second diverging holes 2 located at the same axial length position of the wall panel body 3 form a second diverging hole array, and a plurality of second diverging hole arrays are arranged in sequence along the axial direction of the wall panel body 3, and are located at the upstream position of the airflow in the wall panel body 3 of the first diverging hole array, so as to eliminate the lifting vortex formed by the airflow in the wall panel body 3 downstream of the second diverging hole array. Among them, the secondary hole 22 is designed to offset the single vortex on the leeward side, which effectively suppresses the lifting of the cooling jet at the upstream position of the wall panel body 3, and can effectively avoid the possibility of local hot spots appearing upstream because the cooling jet has not yet formed an air film.

[0064] According to the embodiment of the present disclosure, the cylindrical structure formed by the wall panel body 3 is characterized by a cylinder with uniform wall thickness and consistent inner diameter at each axial position.

[0065] According to an embodiment of the present disclosure, the number of the second diverging hole array is 3-5.

[0066] According to an embodiment of the present disclosure, a spacing between adjacent second diverging hole arrays is 4 to 12 mm.

[0067] In detail, the number of the second diverging hole arrays is 3. The spacing l12 between adjacent second diverging hole arrays is 4 mm. It should be understood that the embodiments of the present disclosure are not limited thereto.

[0068] For example, the specific number of the second diverging hole arrays and the spacing between two adjacent second diverging hole arrays are adaptively designed according to the axial length of the wall plate body 3.

[0069] Furthermore, the spacing between adjacent first diverging arrays in the axial direction of the wall panel body 3 can be set to gradually increase from upstream to downstream.

[0070] Furthermore, the positions of the second diverging holes 2 in the adjacent second diverging hole arrays can be aligned or staggered, so as to minimize the lift vortex formed downstream by the airflow in the wall panel body 3. The aligned setting is characterized by the axial positions of the second diverging holes 2 in each second diverging hole array being aligned in a row on the surface of the wall panel body 3; the staggered setting is characterized by the positions of the second diverging holes 2 other than the aligned setting.

[0071] According to an embodiment of the present disclosure, the circumferential spacing between adjacent second diverging holes 2 in the same second diverging hole array is less than or equal to 10 times the aperture of the main hole 21. Such a design is conducive to improving the continuity of gas diversion for each second diverging hole 2 in the second diverging hole array, and can more effectively prevent the formation of a lifting vortex in a certain local area due to the excessive circumferential spacing of the second diverging holes 2.

[0072] According to the embodiments of the present disclosure, Figure 3 As shown, the axial first end of the secondary hole 22 of the second diverging hole 2 is formed between the inner wall of the wall plate body 3 and the middle point of the axial position of the main hole 21 .

[0073] Furthermore, the first axial end of the secondary hole 22 is characterized as a diversion position where the secondary hole 22 is connected to the main hole 21 , and the distance from the diversion position to the inner wall of the wall plate body 3 does not exceed one half of the axial length of the main hole 21 .

[0074] According to the embodiments of the present disclosure, Figure 3 As shown, the inner diameter d1 of the secondary hole 22 is smaller than or equal to the inner diameter d2 of the main hole 21 .

[0075] According to an embodiment of the present disclosure, the inner diameter d2 of the main hole 21 is 0.5 to 2 mm, and the inner diameter of the auxiliary hole 22 is 0.5 to 1 mm. It should be understood that the embodiments of the present disclosure are not limited thereto.

[0076] For example, if the diameter of the main hole 21 is 0.5 mm, the diameter of the auxiliary hole 22 is less than 0.5 mm. And if the diameter of the main hole 21 is 1 mm, the diameter of the auxiliary hole 22 is less than or equal to 1 mm.

[0077] According to the embodiments of the present disclosure, Figure 4 and Figure 5As shown, the tangential distance h of the main hole 21 (the distance between the plane where the main hole 21 is located and the top of the arc of the wall panel body 3) is less than or equal to 2 mm, and the compound angle β of the main hole 21 (the angle between the airflows along the axis of the main hole 21) is 65 to 85 degrees.

[0078] Furthermore, the tangential distance h of the main hole 21 should be as small as possible, but due to the limitation of the processing technology and the material, 2 mm is taken as the maximum acceptable value of the tangential distance.

[0079] According to the embodiments of the present disclosure, Figure 5 As shown, the included angle α formed by the auxiliary hole 22 and the main hole 21 is 10 to 20 degrees.

[0080] According to an embodiment of the present disclosure, the axial length of the area covered by the second diverging hole array and the first diverging hole array on the wall panel body should be approximately 2 / 3 of the axial length of the wall panel body.

[0081] The flame tube wall panel according to the present disclosure is verified through numerical simulation, and during the verification process, a blowing ratio of 2.2 is used.

[0082] Based on the above background, the verification results show that the average cooling efficiency of tangential divergent cooling is as high as 0.91, which is about 55% higher than that of the circular divergent holes with an inclination angle of 30 degrees; at the same time, the cooling air film downstream of the flame tube can maintain good wall adhesion, reducing the number of downstream openings. Accordingly, the flame tube using the flame tube wall panel disclosed in the present invention has a higher cooling efficiency and requires less cooling air; through the convection heat exchange of the cooling air in the hole and the heat insulation effect formed by the cooling air film on the flame tube wall, the flame tube wall can be cooled more effectively and its operating temperature can be reduced, so that the service life of the flame tube is improved.

[0083] According to another aspect of the present disclosure, a flame liner is provided. The flame liner is formed by using a flame liner wall panel.

[0084] According to an embodiment of the present disclosure, it further includes a cap 4 formed on the air inlet side of the flame tube wall panel, and the cap 4 is communicated with the interior of the flame tube wall panel.

[0085] According to an embodiment of the present disclosure, the flame tube wall panel includes a wall panel body 3 forming a cylindrical structure, and a second diverging hole 2 and a first diverging hole 1 formed on the wall panel body 3 .

[0086] According to an embodiment of the present disclosure, a plurality of second diverging holes 2 located at the same axial length position of the wall panel body 3 form a second diverging hole array; a plurality of first diverging holes 1 located at the same axial length position of the wall panel body 3 form a first diverging hole array; the second diverging hole array is located at an upstream position of the airflow in the wall panel body 3 of the first diverging hole array; the upstream position is characterized as the part through which the airflow in the wall panel body 3 passes first.

[0087] According to yet another aspect of an embodiment of the present disclosure, a gas turbine combustion chamber is provided, wherein a flame tube is provided in the gas turbine combustion chamber 6 .

[0088] In detail, the flame tube is formed in the machine lock 5.

[0089] The above-mentioned specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present disclosure in detail. It should be understood that the above-mentioned are only specific embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A flame tube wall panel, characterized in that: include: The wall panel body (3) forms a cylindrical structure; A plurality of first diverging holes (1) are formed on the wall plate body (3) at even intervals along a circumferential direction; the plurality of first diverging holes (1) located at the same axial length position of the wall plate body (3) form a first diverging hole array, and the plurality of first diverging hole arrays are arranged in sequence along the axial direction of the wall plate body (3) to form a swirl flow in the wall plate body (3); A plurality of second diverging holes (2), each of the second diverging holes (2) comprising: A main hole (21) is formed through the wall plate body (3); and A secondary hole (22), wherein a first axial end of the secondary hole (22) is formed in the middle of the main hole (21), a second axial end of the secondary hole (22) is connected to the inner wall of the wall plate body (3), and an angle formed by the secondary hole (22) and the main hole (21) is an acute angle; The second diverging holes (2) are formed on the wall panel body (3) at uniform intervals along the circumferential direction, and a plurality of second diverging holes (2) located at the same axial length position of the wall panel body (3) form a second diverging hole array, the second diverging hole array is located at an upstream position of the airflow in the wall panel body (3) of the first diverging hole array, and the plurality of second diverging hole arrays are arranged in sequence along the axial direction of the wall panel body (3) to eliminate a lifting vortex formed by the airflow in the wall panel body (3) downstream of the second diverging hole array.

2. The flame tube wall panel according to claim 1, characterized in that: The first diverging hole (1) is formed through the wall plate body (3); the tangential distance of the first diverging hole (1) is less than or equal to 2 mm, and the composite angle of the first diverging hole (1) is 65 to 85 degrees; The tangential distance is characterized by the distance between the plane where the first diverging hole (1) is located and the arc top of the wall panel body (3), and the compound angle is characterized by the angle between the airflow and the axis of the first diverging hole (1).

3. The flame tube wall panel according to claim 1, characterized in that: The diameter of the first diverging holes (1) is 0.5 to 2 mm.

4. The flame tube wall panel according to claim 1, characterized in that: The spacing between each first diverging hole array and an adjacent first diverging hole array located upstream along the axial direction of the wall plate body (3) is less than or equal to the spacing between the same first diverging hole array and an adjacent first diverging hole array located downstream along the axial direction of the wall plate body (3); The upstream is characterized as the part that the airflow in the wall panel body (3) passes through first, and the downstream is characterized as the part that the airflow in the wall panel body (3) passes through later.

5. The flame tube wall panel according to claim 4, characterized in that: The spacing between each first diverging hole array and an adjacent first diverging hole array located upstream along the axial direction of the wall panel body (3) is smaller than the spacing between the same first diverging hole array and an adjacent first diverging hole array located downstream along the axial direction of the wall panel body (3).

6. The flame tube wall panel according to claim 5, characterized in that: The distance between two adjacent first diverging hole arrays along the axial direction of the wall panel body (3) is less than or equal to 25 millimeters.

7. The flame tube wall panel according to claim 2, characterized in that: The tangential distance of the main hole (21) is less than or equal to 2 mm, and the compound angle of the main hole (21) is 65 to 85 degrees; The tangential distance is characterized by the distance between the plane where the main hole (21) is located and the arc top of the wall plate body (3), and the compound angle is characterized by the angle between the axis of the main hole (21) and the airflow.

8. The flame tube wall panel according to claim 1, characterized in that: The included angle formed by the secondary hole (22) and the main hole (21) is 10 to 20 degrees.

9. The flame tube wall panel according to claim 1, characterized in that: The axial first end of the secondary hole (22) is formed between the inner wall of the wall plate body (3) and the midpoint of the axial position of the main hole (21).

10. The flame tube wall panel according to claim 1, characterized in that: The inner diameter of the secondary hole (22) is smaller than or equal to the inner diameter of the main hole (21).

11. The flame tube wall panel according to claim 10, characterized in that: The inner diameter of the main hole (21) is 0.5 to 2 millimeters, and the inner diameter of the secondary hole (22) is 0.5 to 1 millimeter.

12. The flame tube wall panel according to claim 1, characterized in that: The circumferential spacing between adjacent second diverging holes (2) in the same second diverging hole array is less than or equal to 10 times the diameter of the main hole (21).

13. The flame tube wall panel according to claim 1, characterized in that: The number of the second diverging hole arrays is 3 to 5.

14. The flame tube wall panel according to claim 1, characterized in that: The spacing between two adjacent second diverging hole arrays along the axial direction of the wall plate body (3) is 4 to 12 millimeters.

15. A flame tube, characterized in that: The flame tube is formed by using the flame tube wall panel according to any one of claims 1 to 14.

16. The flame tube according to claim 15, characterized in that: It also includes a cap (4) formed on the air inlet side of the flame tube wall plate.

17. The flame tube according to claim 15, characterized in that: Also includes: The wall panel body (3) forms a cylindrical structure; A plurality of first diverging holes (1) are formed on the wall panel body (3); as well as A plurality of second diverging holes (2) are formed on the wall panel body (3).

18. The flame tube according to claim 17, characterized in that: A plurality of first diverging holes (1) located at the same axial length position of the wall plate body (3) form a first diverging hole array; A plurality of the second diverging holes (2) located at the same axial length position of the wall plate body (3) form a second diverging hole array; The second diverging hole array is located at an upstream position of the airflow in the wall panel body (3) of the first diverging hole array, and the upstream position of the airflow is characterized as a portion of the wall panel body (3) through which the airflow passes first.

19. A gas turbine combustion chamber, characterized in that: The gas turbine combustion chamber (6) is provided with a flame tube as claimed in any one of claims 15 to 18.

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