Diverging panel and shroud

Abstract

The application discloses a kind of diffuser panel and bonnet, the diffuser panel includes panel body and spoiler, panel body has first plate and second plate, first plate and second plate are spaced apart along the thickness direction of first plate and oppositely arranged to define mounting cavity, first plate is provided with first hole penetrating first plate along the thickness direction of first plate, second plate is provided with second hole penetrating second plate along the thickness direction of second plate, first hole and second hole are communicated with mounting cavity, so that air flow flows into mounting cavity through first hole and flows out through second hole to reduce the temperature of panel body, the ratio of the surface area of spoiler to its volume is A, the ratio of the area of the inner circumferential surface of mounting cavity to its volume is B, A is greater than B, spoiler is arranged in mounting cavity and is connected with at least one of first plate and second plate.The diffuser panel of the application has the advantages of simple structure, small amount of cooling gas, etc., which can ensure to reduce the flame temperature of combustion chamber head and NOx emission.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of burner equipment, in particular to a diverging panel and a cover. BACKGROUND

[0002] A gas turbine mainly comprises a compressor, a combustion chamber and a turbine, the compressor compresses air, the high-pressure air enters the combustion chamber to mix and burn with fuel, the high-temperature gas generated by the burning is passed through the turbine to do work, part of the power generated by the turbine drives the compressor to compress air, and the other part of the power drives a generator to generate electricity. For the combustion chamber, it mainly comprises a fuel nozzle, a cover, a flow guide bushing, a flame tube and a transition section, etc., the compressed air enters the annular passage between the flow guide bushing and the flame tube in a reverse flow, mixes with the fuel in the nozzle, the combustible mixture enters the flame tube, and the high-temperature gas generated after the burning enters the turbine through the transition section.

[0003] The cover of the combustion chamber is a structure directly contacting the flame surface, and contains a diverging panel structure upstream of the flame tube to provide a boundary for the head flame of the combustion chamber. A large number of dense diverging holes are uniformly arranged on the diverging panel of the cover, cooling air flows through the diverging holes, and the cooling of the diverging panel is realized through the convective heat transfer of the side wall surface of the holes, and the front end surface of the cover is protected.

[0004] In the related art, as shown in the prior art, the number of diverging holes of the diverging surface of the cover is large, and the arrangement is dense, which results in a large amount of diverging cooling air for the cover, and is not conducive to reducing the head flame temperature of the combustion chamber and the NOx emission. Figure 6 SUMMARY

[0005] The present application aims to at least solve one of the technical problems in the related art to some extent.

[0006] To this end, the embodiments of the present application propose a diverging panel capable of reducing the amount of cooling air flow and having fewer diverging holes.

[0007] The embodiments of the present application propose a cover with simple structure and long service life.

[0008] ​The divergent panel according to the embodiment of the present application comprises a panel body having a first plate and a second plate, the first plate and the second plate are oppositely arranged along the thickness direction of the first plate to define a mounting cavity, the first plate is provided with a first hole penetrating the first plate along the thickness direction of the first plate, the second plate is provided with a second hole penetrating the second plate along the thickness direction of the second plate, the first hole and the second hole are communicated with the mounting cavity, so that the airflow flows into the mounting cavity through the first hole and flows out through the second hole to reduce the temperature of the panel body; a spoiler, the ratio of the surface area of the spoiler to its volume is A, the ratio of the area of the inner circumferential surface of the mounting cavity to its volume is B, the A is greater than the B, the spoiler is arranged in the mounting cavity and connected with at least one of the first plate and the second plate, so as to improve the heat exchange coefficient between the first plate and the second plate.

[0009] The divergent panel according to the embodiment of the present application is provided with a spoiler, and the cooling of the divergent panel can be optimized. Compared with the divergent panel without the spoiler, the number of the divergent holes is reduced, and the amount of cooling gas is reduced. The high surface area / volume ratio of the spoiler and the strong disturbance effect on the fluid significantly improve the convective heat exchange coefficient between the first plate and the second plate, and optimize the cooling effect.

[0010] In some embodiments, the panel body is provided with a plurality of third holes penetrating the panel body along the thickness direction thereof, and the plurality of third holes are arranged along the circumferential direction of the panel body, and the third holes are adapted to pass through the nozzles.

[0011] In some embodiments, the divergent panel further comprises a plurality of sleeves, and the plurality of sleeves are respectively sleeved in the plurality of third holes, and the two ends of the sleeves are respectively connected with the first plate and the second plate, so that the third holes are spaced apart from the mounting cavity through the sleeves.

[0012] In some embodiments, the first hole is a plurality of first holes, the plurality of first holes are uniformly distributed in the first plate, the second hole is a plurality of second holes, the plurality of second holes are uniformly distributed on the second plate, in a projection plane perpendicular to the thickness direction of the panel body, the plurality of first holes and the plurality of second holes are staggered in the projection plane, and at least one spoiler is located between the first hole and the second hole.

[0013] In some embodiments, the number of the first holes is not less than the number of the second holes.

[0014] In some embodiments, the plurality of second holes are arranged in multiple rows along a circumference of the panel body, each row comprising a plurality of second holes arranged along a radial direction of the panel body, and at least one row of the second holes is located between two adjacent third holes, and the plurality of first holes are distributed between the third holes and an outer circumferential surface of the panel body.

[0015] In some embodiments, the plurality of turbulence generators are arranged in multiple circles along a radial direction of the panel body, each circle comprising a plurality of turbulence generators arranged along a circumferential direction of the panel body.

[0016] In some embodiments, the panel body and the turbulence generators are formed by an additive manufacturing process.

[0017] In some embodiments, the turbulence generators have any one of an X-lattice shape, a Kagome lattice shape, and a face-centered cubic lattice shape.

[0018] According to the cap of the embodiments of the present application, the cap comprises a cap barrel having an airflow passage, and a diverging panel as described in any one of the above embodiments, the diverging panel being arranged at one end of the cap barrel, and the airflow passage being in communication with the first holes of the diverging panel, so that airflow flows into the first holes through the airflow passage. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of a first plate of a diverging panel of the embodiments of the present application.

[0020] Figure 2 is a structural schematic view of a second plate of a diverging panel of the embodiments of the present application.

[0021] Figure 3 is a structural schematic view of a diverging panel without turbulence generators of the embodiments of the present application.

[0022] Figure 4 is a sectional view of a diverging panel of the embodiments of the present application.

[0023] Figure 5 is a structural schematic view of a turbulence generator of a diverging panel of the embodiments of the present application.

[0024] Figure 6 is a structural schematic view of a cap in the related art.

[0025] REFERENCE SIGNS:

[0026] diverging panel 100; cap barrel 10;

[0027] Panel body 1; First plate 11; First hole 111; Second plate 12; Second hole 121; Third hole 13; Mounting cavity 14;

[0028] 2. Aerodynamic component; 3. Sleeve. 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 description of a diverging panel according to an embodiment of the present invention is with reference to the accompanying drawings.

[0031] like Figures 1-5 As shown, the diverging panel according to an embodiment of the present invention includes a panel body 1 and a deflector 2.

[0032] The panel body 1 has a first plate 11 and a second plate 12, the first plate 11 and the second plate 12 being along the thickness direction of the first plate 11 (e.g., Figure 3 The mounting cavity 14 is defined by the relative arrangement of the plates (shown in the vertical direction) at intervals. A first hole 111 is provided on the first plate 11, penetrating the first plate 11 along its thickness direction. A second hole 121 is provided on the second plate 12, penetrating the second plate 12 along its thickness direction. Both the first hole 111 and the second hole 121 communicate with the mounting cavity 14, allowing airflow to enter the mounting cavity 14 through the first hole 111 and exit through the second hole 121. Specifically, as shown... Figures 1-3 As shown, the first plate 11 and the second plate 12 are both circular plates. The first plate 11 and the second plate 12 are spaced apart in the vertical direction to define the mounting cavity 14. The first plate 11 has a first hole 111 that penetrates the first plate 11 in the vertical direction, and the second plate 12 has a second hole 121 that penetrates the second plate 12 in the vertical direction. Thus, airflow enters the mounting cavity 14 through the first hole 111 and flows out of the second hole 121 through the mounting cavity 14.

[0033] The ratio of the surface area to the volume of the baffle 2 is A, and the ratio of the area to the volume of the inner circumferential surface of the mounting cavity 14 is B, where A is greater than B. The baffle 2 is disposed within the mounting cavity 14 and is connected to at least one of the first plate 11 and the second plate 12, so that the baffle 2 disturbs the airflow within the mounting cavity 14 to improve the heat transfer coefficient between the first plate 11 and the second plate 12. Specifically, as shown... Figures 1-4As shown, the spoiler 2 is fixedly installed in the installation cavity 14 and connected with the lower end surface of the first plate 11 or the upper end surface of the second plate 12, the ratio of the surface area of the spoiler 2 to the volume of the spoiler 2 is A, the ratio of the area of the inner circumferential surface of the installation cavity 14 to the volume of the installation cavity 14 is B, and A is greater than B (in other words, the spoiler 2 has a higher specific surface area), thereby, through the high specific surface area and the disturbance of the spoiler 2, the heat exchange coefficient between the first plate 11 and the second plate 12 is improved, thereby improving the cooling effect of the airflow, in addition, the spoiler 2 also hinders the flow of the airflow, prolongs the flow time of the airflow in the installation cavity 2, thereby further improving the cooling effect of the airflow.

[0034] The diverging panel 100 of the embodiment of the present application is provided with the spoiler 2, which optimizes the cooling of the diverging panel 100, improves the cooling effect of the airflow, and can reduce the number of the first holes 111 and the second holes 121 of the diverging panel 100, thereby reducing the amount of cooling airflow and ensuring the flame temperature and NOx emission of the combustion chamber head.

[0035] In some embodiments, the panel body 1 is provided with a plurality of third holes 13 penetrating the panel body 1 along the thickness direction thereof, and the plurality of third holes 13 are arranged at intervals along the circumferential direction of the panel body 1, and the third holes 13 are adapted to pass through the nozzles. Specifically, as shown in Figures 1-4 The panel body 1 is provided with a plurality of third holes 13 penetrating the panel body 1 along the up-down direction, one of the third holes 13 is located at the middle of the panel body 1, and the remaining third holes 13 are arranged at intervals along the circumferential direction of the panel body 1, and a plurality of nozzles are respectively and correspondingly arranged in the third holes 13.

[0036] In some embodiments, the diverging panel 100 further comprises a plurality of sleeves 3, and the plurality of sleeves 3 are respectively and correspondingly arranged in the plurality of third holes 13, and the two ends of the sleeve 3 are respectively connected with the first plate 11 and the second plate 12, so that the third hole 13 is spaced apart from the installation cavity 14 by the sleeve 3. Specifically, as shown in Figures 3-4 The number of sleeves 3 is equal to the number of third holes 13, and one sleeve 3 is arranged in each third hole 13, and the upper and lower ends of the sleeve 3 are respectively connected with the first plate 11 and the second plate 12, in other words, the inner circumferential surface of the sleeve 3 defines the inner circumferential surface of the third hole 13, so that the third hole 13 is spaced apart from the installation cavity 14, thereby preventing the airflow in the installation cavity 14 from flowing into the third hole 13, and ensuring the working efficiency of the nozzles and preventing the influence of the airflow on the nozzles.

[0037] In some embodiments, the first holes 111 are multiple, and the multiple first holes 111 are uniformly distributed in the first plate 11. The second holes 121 are multiple, and the multiple second holes 121 are uniformly distributed on the second plate 12. In the projection plane perpendicular to the thickness direction of the panel body 1, the multiple first holes 111 and the multiple second holes 121 are staggered in the projection plane, and at least one spoiler 2 is located between the first hole 111 and the second hole 121. Specifically, as shown in Figures 1-2 the multiple first holes 111 and the multiple second holes 121 are respectively uniformly distributed on the first plate 11 and the second plate 12, and in the projection plane perpendicular to the up-down direction, the multiple first holes 111 and the multiple second holes 121 are staggered in the projection plane (in other words, the first holes 111 and the second holes 121 are not arranged opposite to each other in the up-down direction, the first holes 111 are arranged opposite to the second plate 12, and the second holes 121 are arranged opposite to the first plate 11), and each first hole 111 and second hole 121 is provided with a spoiler 2, so that the air flow flows into the mounting cavity 14 through the first hole 111, and then is disturbed by the spoiler 2 before flowing out of the second hole 121, preventing the air flow from flowing directly from the first hole 111 into the second hole 121, further improving the disturbance of the air flow in the mounting cavity 14 and the convective heat transfer coefficient between the first plate 11 and the second plate 12, and prolonging the service life of the radiant panel 100.

[0038] In some embodiments, the number of first holes 111 is not less than the number of second holes 121. Specifically, the number of first holes 111 is greater than or equal to the number of second holes 121. In this way, the air intake of the air flow in the mounting cavity 14 is ensured, thereby improving the heat exchange efficiency of the panel body 1.

[0039] In some embodiments, the multiple second holes 121 are arranged in multiple rows along the circumferential direction of the panel body 1, each row including multiple second holes 121 arranged along the radial direction of the panel body 1, at least one row of second holes 121 is located between two adjacent third holes 13, and the multiple first holes 111 are uniformly distributed between the third hole 13 and the outer circumferential surface of the panel body 1. Specifically, as shown in Figures 1-2 the multiple second holes 121 are arranged in multiple rows along the circumferential direction of the panel body 1, each row including multiple second holes 121 arranged along the radial direction of the panel body 1, at least one row of second holes 121 is located between two adjacent third holes 13, and the multiple first holes 111 are uniformly distributed between the third hole 13 and the outer circumferential surface of the panel body 1. Specifically, as shown in

[0040] In some embodiments, the plurality of turbulence generators 2 are arranged in the mounting cavity 14 in a plurality of rows along a radial direction of the panel body 1, and each row includes a plurality of turbulence generators 2 arranged along a circumferential direction of the panel body 1. In this way, the turbulence generators 2 are evenly distributed in the mounting cavity 14, and the turbulence and heat exchange effects of the turbulence generators 2 are ensured.

[0041] It should be noted that the present application does not specifically limit the arrangement of the plurality of turbulence generators 2, and the plurality of turbulence generators 2 can be fixed together in sequence according to actual conditions.

[0042] Since the additive manufacturing process has the advantages of free-form manufacturing and rapid manufacturing process, in some embodiments, the panel body 1 and the turbulence generators 2 are formed by the additive manufacturing process. In this way, the panel body 1 and the turbulence generators 2 are integrally formed by the additive manufacturing process, which reduces the manufacturing time of the diverging panel and ensures the manufacturing quality of the diverging panel.

[0043] In some embodiments, as shown in Figure 5 the shape of the turbulence generator 2 is any one of an X-lattice shape, a Kagome lattice shape, and a face-centered cubic lattice shape. Since the specific surface area of the lattice shape is larger than that of the mounting cavity 14, the surface area of the turbulence generator 2 is larger under the same volume, and therefore the cooling effect of the turbulence generator 2 is good. In addition, the lattice-shaped turbulence generator 2 can also support the first plate 11 and the second plate 12, which improves the strength of the panel body 1 and prolongs the service life of the panel body 1.

[0044] The cap according to the embodiments of the present application includes a cap barrel 10 and a diverging panel 100

[0045] The cap barrel 10 has an airflow passage. Specifically, the cap barrel 10 is a cylindrical shape extending in the up-down direction, and the inner circumferential surface of the cap barrel 10 defines the airflow passage, and the air inlet of the airflow passage is located at the upper end of the cap barrel 10.

[0046] The diverging panel 100 is the diverging panel 100 of any one of the above embodiments, and the diverging panel 100 is arranged at one end of the cap barrel 10, and the airflow passage is in communication with the first hole 111 of the diverging panel 100, so that the airflow flows into the first hole 111 through the airflow passage. Specifically, as shown in Figures 1-5 the diverging panel 100 is arranged at the lower end of the cap barrel 10, and the airflow passage and the first hole 111 are arranged opposite to each other in the up-down direction, so that the airflow flows into the first hole 111 through the airflow passage to cool the diverging panel 100.

[0047] The cap according to the embodiments of the present application has the advantages of simple structure and long service life.

[0048] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated thereby. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0050] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0052] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terminology "comprising" is used in the disclosure as comprising but not limited to, that is, it is open-ended and does not exclude the presence of additional features, structures, materials, or characteristics.

[0053] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present disclosure, and that those skilled in the art can make changes, modifications, substitutions and variations of the above-described embodiments within the scope of the present disclosure.

Claims

1. A diverging panel, characterized in that, include: The panel body has a first plate and a second plate, which are spaced apart and opposite to each other along the thickness direction of the first plate to define a mounting cavity. The first plate has a plurality of first holes penetrating the first plate along the thickness direction, and the second plate has a plurality of second holes penetrating the second plate along the thickness direction. Both the first holes and the second holes communicate with the mounting cavity so that airflow flows into the mounting cavity through the first holes and flows out through the second holes to reduce the temperature of the panel body. The panel body also has a plurality of third holes penetrating the panel body along its thickness direction, which are spaced apart circumferentially along the panel body. The third holes are adapted to pass through nozzles. A flow-deflecting element, wherein the ratio of the surface area to the volume of the flow-deflecting element is A, and the ratio of the area to the volume of the inner circumferential surface of the mounting cavity is B, wherein A is greater than B, the flow-deflecting element is disposed in the mounting cavity and connected to at least one of the first plate and the second plate, so as to improve the heat transfer coefficient between the first plate and the second plate. A plurality of first holes are evenly distributed within the first plate, and a plurality of second holes are evenly distributed on the second plate. In a projection plane orthogonal to the thickness direction of the panel body, the plurality of first holes and the plurality of second holes are staggered in the projection plane, and at least one of the baffles is located between the first holes and the second holes. The plurality of second holes are arranged in multiple rows at intervals along the circumference of the panel body, each row including a plurality of second holes arranged at intervals along the radial direction of the panel body. At least one row of second holes is located between two adjacent third holes, and the plurality of first holes are evenly distributed between the third holes and the outer peripheral surface of the panel body.

2. The diverging panel according to claim 1, characterized in that, It also includes multiple sleeves, which are respectively fitted into multiple third holes. The two ends of each sleeve are connected to the first plate and the second plate, respectively, so that the third hole and the mounting cavity are separated by the sleeve.

3. The diverging panel according to claim 1, characterized in that, The number of the first holes is not less than the number of the second holes.

4. The diverging panel according to claim 1, characterized in that, There are multiple baffles, all of which are disposed within the mounting cavity. The multiple baffles are arranged in multiple rings along the radial direction of the panel body, with each ring including several baffles arranged in sequence along the circumference of the panel body.

5. The diverging panel according to claim 1, characterized in that, The panel body and the spoiler are formed by additive manufacturing process.

6. The diverging panel according to claim 1, characterized in that, The shape of the disturbance element is any one of the following: X-shaped lattice, Kagome lattice, or face-centered cubic lattice.

7. A hood, characterized in that, include: A cap tube, the cap tube having an airflow channel; A diverging panel, wherein the diverging panel is any one of claims 1-6, the diverging panel is disposed at one end of the cap cylinder, and the airflow channel is connected to the first hole of the diverging panel so that airflow flows into the first hole through the airflow channel.

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