Strong-mixing high-temperature-resistant hydrogen nozzle and combustion assembly with same

Abstract

The strong-mixing high-temperature-resistant hydrogen nozzle comprises a shell and a hydrogen supply pipe, the shell is provided with a gas spraying opening, the hydrogen supply pipe is arranged in the shell, the hydrogen supply pipe and the shell are arranged in a spaced mode to form an inner cavity, the hydrogen supply pipe is provided with a plurality of hydrogen outlets, and the hydrogen outlets are communicated with the shell. The outer peripheral wall of the hydrogen supply pipe and the inner peripheral wall of the air nozzle are arranged at intervals to form a first air outlet, the multiple first air inlets are arranged in the circumferential direction of the shell at intervals and communicate with the inner cavity, the first air inlets extend in the tangential direction of the inner cavity, and airflow flowing out of the first air inlets forms a first rotational flow rotating in the first circumferential direction; the gas flow flowing out of the hydrogen outlet forms a second rotational flow rotating along a second circumferential direction, and the second circumferential direction is opposite to the first circumferential direction. According to the strong-mixing high-temperature-resistant hydrogen nozzle disclosed by the embodiment of the invention, the mixing uniformity of hydrogen and air is enhanced by arranging the first rotational flow and the second rotational flow, and meanwhile, the shell is cooled by utilizing the first rotational flow.

Description

Technical Field

[0001] This invention relates to the field of combustion chamber nozzle technology, and more particularly to a high-temperature hydrogen nozzle with strong mixing and a combustion assembly having the same. Background Technology

[0002] In the vortex combustor of aircraft engines and other fields, the use of hydrogen fuel can reduce pollutant emissions and improve aircraft performance. However, hydrogen has a relatively low density compared to traditional fuels and low inertia, resulting in a slow diffusion rate in the flow field. It is not easy to mix fully with air, leading to incomplete combustion and low combustion efficiency.

[0003] Furthermore, in related technologies, hydrogen combustion is mainly divided into diffusion combustion and premixed combustion. Diffusion combustion has high stability but high flame temperature, which can easily generate local high-temperature zones and high NOx emissions; micro-mixed combustion improves the mixing intensity through micro-nozzles, but is prone to problems such as backfire. At the same time, the hydrogen nozzle is prone to ablation during combustion because it extends into the flame tube.

[0004] Therefore, there is an urgent need for a hydrogen combustion solution that is highly mixed, heat-resistant, and not prone to backfire to solve these problems. Summary of the Invention

[0005] This invention provides a high-temperature resistant hydrogen nozzle with strong mixing properties to solve the defects of the prior art, such as uneven mixing of hydrogen and air, easy high-temperature erosion of the nozzle, and easy backfire. It realizes the reverse swirl mixing of hydrogen and air and cools the nozzle to avoid backfire.

[0006] The present invention also provides a combustion assembly.

[0007] This invention provides a high-temperature resistant, strongly mixed hydrogen nozzle, comprising: The casing is equipped with an air jet. A hydrogen supply pipe is disposed inside the housing and spaced apart from the housing to form an inner cavity. The hydrogen supply pipe has multiple hydrogen outlets. The outer peripheral wall of the hydrogen supply pipe is spaced apart from the inner peripheral wall of the jet nozzle to form a first air outlet. Multiple first air inlets are circumferentially spaced around the housing and communicate with the inner cavity; The first air inlet extends tangentially along the inner cavity, the airflow flowing out of the first air inlet forms a first vortex rotating in a first circumferential direction, and the airflow flowing out of the hydrogen outlet forms a second vortex rotating in a second circumferential direction, which is opposite to the first circumferential direction.

[0008] In some embodiments, the housing includes an outer shell and an inner shell, the outer shell being fitted over the inner shell, and the outer shell and the inner shell being spaced apart to form an outer cavity; Multiple second air inlets are provided in the outer casing and communicate with the outer cavity; The jet nozzle penetrates the shell wall of the outer shell and the shell wall of the inner shell, thereby forming a second air outlet on the inner peripheral wall of the jet nozzle that communicates with the outer cavity.

[0009] In some embodiments, the housing includes a cylindrical portion and a spherical portion, the spherical portion being disposed at one end of the cylindrical portion, and the air outlet being disposed at the junction of the cylindrical portion and the spherical portion, with a portion of the air outlet being disposed in the cylindrical portion and another portion of the air outlet being disposed in the spherical portion.

[0010] In some embodiments, the hydrogen supply pipe includes a cylindrical section and a nozzle section, the cylindrical section being disposed at one end of the nozzle section, and the nozzle section being inclined relative to the cylindrical section and extending toward the jet nozzle.

[0011] In some embodiments, the nozzle section includes an end plate, the hydrogen outlet is disposed on the end plate, a plurality of the hydrogen outlets are arranged circumferentially around the end plate, and the center line of the hydrogen outlet is inclined relative to the axial direction of the nozzle section, so that the ejected gas flow forms the second vortex.

[0012] In some embodiments, the high-temperature resistant hydrogen nozzle with strong mixing capacity includes: A heat-conducting plate is disposed in the outer cavity and is connected to both the outer shell and the inner shell. A plurality of heat-conducting plates are arranged circumferentially around the inner shell.

[0013] In some embodiments, the high-temperature resistant hydrogen nozzle with strong mixing capacity includes: A fastener is fixedly connected to the other end of the cylindrical part, and the fastener is provided with multiple mounting holes.

[0014] In some embodiments, the high-temperature resistant hydrogen nozzle with strong mixing capacity includes: A connecting pipe is located on the side of the fixing member opposite to the cylindrical part and is connected to the hydrogen supply pipe.

[0015] This invention provides a combustion assembly, comprising: The high-temperature hydrogen nozzle with strong mixing described in any of the above embodiments; The combustion component includes a separate combustion chamber and a cooling chamber, wherein the combustion chamber is disposed within the cooling chamber; Multiple highly mixed, high-temperature hydrogen nozzles are arranged circumferentially around the combustion component, and the jet nozzles are installed inside the combustion chamber. The centerline of the jet nozzles intersects the radial direction of the combustion chamber, and the airflow ejected from the multiple jet nozzles forms a circumferential vortex in the combustion chamber.

[0016] In some embodiments, the combustion assembly includes: Multiple third air outlets connect the cooling chamber and the combustion chamber; Multiple guide vanes are disposed inside the combustion chamber and correspond one-to-one with multiple third air outlets to guide the airflow flowing out of the third air outlets to form a spanwise vortex.

[0017] The high-temperature resistant hydrogen nozzle for strong mixing in this invention utilizes a hydrogen supply pipe with a hydrogen outlet within the housing. The internal cavity between the housing and the supply pipe guides airflow, creating opposite swirling flows of air and hydrogen. The first and second swirling flows rotate in opposite directions, enhancing the shearing effect and contact area between air and hydrogen in the outlet region, improving initial mixing, resulting in uniform air-hydrogen mixing and increased combustion efficiency. Simultaneously, the first swirling flow passes through the internal cavity and forms a covering flow near the nozzle, cooling the housing, supply pipe, and nozzle, helping to alleviate localized high temperatures. Furthermore, the gap between the outer wall of the supply pipe and the inner wall of the nozzle forms a first air outlet, resulting in a faster airflow velocity at the outlet. This accelerates the air, effectively blowing the flame outside the housing and preventing backfire. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the high-temperature hydrogen nozzle with strong mixing provided by the present invention.

[0020] Figure 2 This is a schematic diagram of a half-section of the high-temperature hydrogen nozzle with strong mixing provided by the present invention.

[0021] Figure 3 This is a cross-sectional schematic diagram of the high-temperature hydrogen nozzle with strong mixing provided by the present invention at the first air inlet.

[0022] Figure 4 This is a cross-sectional schematic diagram of the high-temperature hydrogen nozzle with strong mixing provided by the present invention at the second air inlet.

[0023] Figure 5 This is a schematic diagram of the combustion assembly provided by the present invention.

[0024] Figure 6 This is a front view schematic diagram of the combustion assembly provided by the present invention.

[0025] Figure 7 yes Figure 6Sectional view at point AA.

[0026] Figure 8 This is a half-sectional schematic diagram of the combustion assembly provided by the present invention.

[0027] Figure 9 yes Figure 8 A magnified view of a portion of the image.

[0028] Figure 10 yes Figure 7 A magnified view of a portion of the image.

[0029] Figure label: 100. High-temperature hydrogen mixing nozzle; 1. Shell; 11. Exhaust nozzle; 121. Inner cavity; 122. Outer cavity; 131. Outer shell; 132. Inner shell; 14. Cylindrical part; 15. Spherical part; 2. Hydrogen supply pipe; 21. Hydrogen outlet; 22. Cylindrical section; 23. Nozzle section; 231. End plate; 31. First air outlet; 32. First air inlet; 41. Second air inlet; 42. Second air outlet; 5. Heat-conducting sheet; 6. Fasteners; 61. Mounting holes; 7. Connecting pipe; 200. Combustion assembly; 201. Combustion component; 202. Combustion chamber; 203. Cooling chamber; 204. Third air outlet; 205. Guide plate; 206. Casing; 207. Third air inlet; 208. Flame tube. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0031] like Figures 1 to 10 As shown, the high-temperature hydrogen nozzle 100 with strong mixing in this embodiment of the invention includes a housing 1 and a hydrogen supply pipe 2.

[0032] The housing 1 is provided with a jet nozzle 11.

[0033] The hydrogen supply pipe 2 is disposed inside the housing 1 and spaced apart from the housing 1 to form an inner cavity 121. The hydrogen supply pipe 2 is provided with multiple hydrogen outlets 21. The outer peripheral wall of the hydrogen supply pipe 2 is spaced apart from the inner peripheral wall of the jet outlet 11 to form a first air outlet 31.

[0034] Multiple first air inlets 32 are circumferentially spaced around the housing 1 and communicate with the inner cavity 121.

[0035] The first air inlet 32 ​​extends tangentially along the inner cavity 121. The airflow flowing out of the first air inlet 32 ​​forms a first vortex that rotates in the first circumferential direction, and the airflow flowing out of the hydrogen outlet 21 forms a second vortex that rotates in the second circumferential direction, which is opposite to the first circumferential direction.

[0036] The hydrogen supply pipe 2 is disposed inside the housing 1 and is spaced apart from the housing 1, thereby forming an inner cavity 121 between the two.

[0037] The hydrogen supply pipe 2 has multiple hydrogen outlets 21 for outputting hydrogen gas. The hydrogen outlets 21 are arranged corresponding to the jet nozzles 11.

[0038] A gap is left between the outer peripheral wall of the hydrogen supply pipe 2 and the inner peripheral wall of the jet nozzle 11, which forms the first air outlet 31. The housing 1 is provided with a plurality of first air inlets 32, which are distributed at intervals along the circumference of the housing 1 and are connected to the inner cavity 121.

[0039] Each first air inlet 32 ​​extends tangentially along the inner cavity 121, meaning that the airflow entering from the first air inlet 32 ​​flows tangentially along the inner wall of the shell 1 in the inner cavity 121, which can more smoothly form a circumferential vortex, reduce flow resistance and energy loss, and help improve the rotation intensity of the first vortex, thereby enhancing the mixing effect between it and the second vortex ejected in the opposite direction.

[0040] Hydrogen has a relatively low density compared to traditional fuels and low inertia, resulting in a slow diffusion rate in the flow field. It is not easy to mix fully with air, leading to incomplete combustion and low combustion efficiency.

[0041] In related technologies, hydrogen combustion is mainly divided into diffusion combustion and premixed combustion. Diffusion combustion has high stability but high flame temperature, which can easily generate localized high-temperature zones and result in high NOx emissions. Micromixed combustion improves the mixing intensity through micro-nozzles, but it is prone to problems such as backfire. Furthermore, the hydrogen nozzle, extending into the flame tube, is susceptible to erosion during combustion. Therefore, there is an urgent need for a hydrogen combustion solution that is both highly mixed and resistant to high temperatures to address these issues.

[0042] The high-temperature hydrogen nozzle 100 of this invention, which features strong mixing, utilizes a hydrogen supply pipe 2 with a hydrogen outlet 21 within the housing 1 and guides airflow through the inner cavity 121 between the housing 1 and the hydrogen supply pipe 2, causing air and hydrogen to form swirling flows in opposite directions. The first and second swirling flows rotate in opposite directions, which helps to enhance the shearing effect and contact area of ​​air and hydrogen in the outlet region, improving the initial mixing effect, resulting in uniform mixing of air and hydrogen, and increasing combustion efficiency.

[0043] Meanwhile, the first swirling flow passes through the inner cavity 121 and forms a covering flow near the jet nozzle 11, which has a cooling effect on the shell 1, the hydrogen supply pipe 2 and the jet nozzle 11, and helps to alleviate the problem of local high temperature.

[0044] Moreover, the gap between the outer peripheral wall of the hydrogen supply pipe 2 and the inner peripheral wall of the jet nozzle 11 forms the first air outlet 31, which makes the airflow velocity at the first air outlet 31 faster, thereby accelerating the air and blowing the fire outside the shell 1, thus avoiding backfire.

[0045] In some embodiments, the housing 1 includes an outer shell 131 and an inner shell 132, the outer shell 131 being sleeved on the inner shell 132, and the outer shell 131 and the inner shell 132 being spaced apart to form an outer cavity 122.

[0046] Multiple second air inlets 41 are located on the outer casing 131 and communicate with the outer cavity 122.

[0047] The jet nozzle 11 penetrates the shell wall of the outer shell 131 and the shell wall of the inner shell 132, thereby forming a second air outlet 42 on the inner peripheral wall of the jet nozzle 11 that communicates with the outer cavity 122.

[0048] In this embodiment, the housing 1 adopts a double-layer structure, and an annular gap is left between the outer shell 131 and the inner shell 132 as an outer cavity 122. A second air outlet 42 is formed at the gap between the inner shell 132 and the outer shell 131 at the air outlet 11.

[0049] Air can enter the outer cavity 122 through multiple second air inlets 41 provided on the outer casing 131, and then flow out through the second air outlet 42. This airflow path is independent of the first swirling air in the inner cavity 121, and can participate in the combustion process as additional cooling or mixing airflow.

[0050] The high-temperature hydrogen nozzle 100 of this invention, by setting an outer cavity 122 between the outer shell 131 and the inner shell 132 and the corresponding second air inlet 41 and second air outlet 42, introduces an independent external cooling airflow, forming an additional gas film or mixed airflow in the jet nozzle 11 area, which helps to reduce the temperature of the shell 1 and further promote the mixing of hydrogen and air, making the air and hydrogen mixture more uniform.

[0051] Furthermore, a second air outlet 42 is formed in the gap between the inner shell 132 and the outer shell 131 at the jet nozzle 11, which makes the airflow velocity at the second air outlet 42 faster, thereby accelerating the air and blowing the fire outside the shell 1 to avoid backfire.

[0052] In some embodiments, the housing 1 includes a cylindrical portion 14 and a spherical portion 15. The spherical portion 15 is disposed at one end of the cylindrical portion 14, and the air nozzle 11 is disposed at the junction of the cylindrical portion 14 and the spherical portion 15. A portion of the air nozzle 11 is disposed in the cylindrical portion 14, and another portion of the air nozzle 11 is disposed in the spherical portion 15.

[0053] In this embodiment, the jet nozzle 11 is located at the connection between the cylindrical portion 14 and the spherical portion 15, with part of the opening located on the side wall of the cylindrical portion 14 and part located on the curved surface of the spherical portion 15.

[0054] In this embodiment, the jet nozzle 11 is located in the connection area between the cylindrical portion 14 and the spherical portion 15. Part of the opening is arranged on the side wall of the cylindrical portion 14, and the other part is arranged on the curved surface of the spherical portion 15. The spherical portion 15 forms a local contraction structure at the jet nozzle 11, so that the cross-sectional area of ​​the flow channel is reduced and the flow velocity is increased when the air in the outer cavity 122 flows through this area.

[0055] The high-temperature hydrogen nozzle 100 of this embodiment accelerates the cooling air through the contraction structure formed at the jet nozzle 11 by the spherical part 15, thereby enhancing the momentum of the outer airflow and helping to more effectively transport the initially mixed hydrogen and air to the spanwise vortex of the main combustion zone.

[0056] In some embodiments, the hydrogen supply pipe 2 includes a cylindrical section 22 and a nozzle section 23. The cylindrical section 22 is disposed at one end of the nozzle section 23, and the nozzle section 23 is inclined relative to the cylindrical section 22 and extends toward the jet nozzle 11.

[0057] In this embodiment, the hydrogen supply pipe 2 is divided into two parts: a cylindrical section 22 for connecting to the hydrogen source; and a nozzle section 23 located near the spherical part 15, with the axis of the nozzle section 23 deflected relative to the cylindrical section 22 and extending at an angle toward the nozzle 11. This arrangement makes the hydrogen outlet closer to the nozzle 11 area and facilitates control of the hydrogen outlet direction.

[0058] In some embodiments, the nozzle section 23 includes an end plate 231, a hydrogen outlet 21 is disposed on the end plate 231, and a plurality of hydrogen outlets 21 are arranged circumferentially around the end plate 231. The center line of the hydrogen outlet 21 is inclined relative to the axial direction of the nozzle section 23, so that the ejected gas flow forms a second vortex.

[0059] In this embodiment, the front end of the nozzle section 23 is closed and equipped with an end plate 231. Multiple hydrogen outlets 21 are evenly distributed along the circumference of the end plate 231, and the center line of each hydrogen outlet 21 is not along the axial direction, but is opened at a certain angle. When hydrogen gas is ejected from these inclined outlets, a second vortex is formed that rotates around the axial direction of the nozzle section 23.

[0060] The high-temperature hydrogen nozzle 100 of this invention, which is designed to produce hydrogen swirl without additional flow guiding structure by setting circumferentially distributed and axially inclined hydrogen outlets 21 on the end plate 231, generates a strong shearing effect at the outlet, thereby promoting the initial mixing of hydrogen and air.

[0061] In some embodiments, the high-temperature hydrogen nozzle 100 with strong mixing includes a heat-conducting plate 5, which is disposed in the outer cavity 122 and is connected to both the outer shell 131 and the inner shell 132. A plurality of heat-conducting plates 5 are arranged circumferentially around the inner shell 132.

[0062] In this embodiment, a plurality of heat-conducting plates 5 are provided in the outer cavity 122 between the outer shell 131 and the inner shell 132. Each heat-conducting plate 5 is connected to both the inner wall of the outer shell 131 and the outer wall of the inner shell 132, and is evenly arranged circumferentially and avoids the second air inlet 41. Alternatively, the heat-conducting plates 5 are arranged along the axial direction of the shell 1.

[0063] The heat-conducting sheet 5 can absorb the heat received by the outer shell 131 and dissipate heat directly through the cooling air in the outer cavity 122; it can also conduct heat to the inner shell 132, and further remove the heat with the help of the cooling air in the inner cavity 121, thereby reducing the surface temperature of the outer shell 131.

[0064] The high-temperature hydrogen nozzle 100 of this invention, by providing a heat-conducting plate 5 in the outer cavity 122 to connect the outer shell 131 and the inner shell 132, constructs a solid heat-conducting channel across the shell 1, so that heat can be transferred from the surface of the shell 1 to the inside of the shell 1 and carried away by the cooling air in the inner cavity 121 or the outer cavity 122, which helps to balance the temperature distribution of the shell 1 and reduce the local heat load of the outer shell 131.

[0065] In some embodiments, the high-temperature hydrogen nozzle 100 with strong mixing includes a fixing member 6, which is fixedly connected to the other end of the cylindrical portion 14, and the fixing member 6 is provided with a plurality of mounting holes 61.

[0066] In this embodiment, the fixing member 6, the cylindrical section 22, and the spherical part 15 are connected in sequence. The fixing member 6 is used to install the strongly mixed high-temperature resistant hydrogen nozzle 100 onto the casing 206 or other support structure. The fixing member 6 has multiple mounting holes 61 to facilitate the positioning of the strongly mixed high-temperature resistant hydrogen nozzle 100 by bolts or pins.

[0067] The high-temperature resistant hydrogen nozzle 100 of this embodiment of the invention is easy to install by providing a fixing member 6 with mounting holes 61.

[0068] In some embodiments, the high-temperature hydrogen nozzle 100 with strong mixing includes a connecting pipe 7, which is located on the side of the fixing member 6 away from the cylindrical portion 14 and is connected to the hydrogen supply pipe 2.

[0069] In this embodiment, the connecting pipe 7 and the cylindrical part 14 are respectively located on both sides of the fixing member 6. The connecting pipe 7 is connected to the hydrogen supply pipe 2 and is used to connect to the external hydrogen supply pipeline to introduce hydrogen fuel into the hydrogen supply pipe 2.

[0070] The combustion assembly 200 of this invention includes the strongly mixed, high-temperature resistant hydrogen nozzle 100 and the combustion component 201 described in any of the above embodiments.

[0071] The combustion component 201 includes an independent combustion chamber 202 and a cooling chamber 203, with the combustion chamber 202 located within the cooling chamber 203.

[0072] Multiple highly mixed, high-temperature hydrogen nozzles 100 are arranged circumferentially around the combustion component 201, and the jet nozzles 11 are installed inside the combustion chamber 202. The center line of the jet nozzles 11 intersects the radial direction of the combustion chamber 202, and the airflow ejected from the multiple jet nozzles 11 forms a circumferential vortex in the combustion chamber 202.

[0073] In this embodiment, the combustion component 201 has a nested structure inside: the inner side is a combustion chamber 202, which is used to accommodate the combustion reaction; the outer side is a cooling chamber 203 surrounding the combustion chamber 202, which is used to circulate cooling air.

[0074] Multiple high-temperature hydrogen nozzles 100 with strong mixing capacity are evenly distributed around the combustion component 201, and their nozzles 11 extend into the combustion chamber 202.

[0075] The centerline of the jet nozzle 11 intersects the radial direction of the combustion chamber 202. For example, as... Figure 10 As shown, the centerline of the jet nozzle 11 intersects the radial direction of the combustion chamber 202 to form an angle α, where 60 degrees ≤ α < 90 degrees.

[0076] Optionally, a is 75-80 degrees, so that the centerline of the jet nozzle 11 is generally tangential to the inner peripheral wall of the combustion chamber 202, thereby causing the swirling mixed gas ejected by multiple strongly mixed high-temperature hydrogen nozzles 100 to work together in the combustion chamber 202 to induce the formation of a circumferential vortex that rotates around the axial direction of the combustion component 201.

[0077] The combustion assembly 200 of this invention actively constructs a circumferential vortex in the combustion chamber 202 by circumferentially arranging multiple strongly mixed high-temperature resistant hydrogen nozzles 100 and having their jets work together. This helps to achieve flame coupling, circumferential homogenization of the temperature field, and provides basic flow field conditions for subsequent coupling with the spanwise vortex to form a ring vortex flame stabilization structure.

[0078] In some embodiments, a plurality of third air outlets 204 connect the cooling chamber 203 and the combustion chamber 202.

[0079] Multiple guide vanes 205 are disposed in the combustion chamber 202 and correspond one-to-one with multiple third air outlets 204 to guide the airflow flowing out of the third air outlets 204 to form a spanwise vortex.

[0080] In this embodiment, the combustion component 201 is provided with a third air inlet 207 that communicates with the cooling chamber 203. Air in the cooling chamber 203 enters the combustion chamber 202 through multiple third air outlets 204. Each third air outlet 204 is provided with a guide plate 205 fixed on the inner wall of the combustion chamber 202.

[0081] The geometry and installation angle of the guide plate 205 constrain the direction of the outflowing airflow. For example, the guide plate 205 forms a guide groove with the inner wall of the combustion chamber 202, so that the gas flowing out from the third air outlet 204 forms a spanwise vortex.

[0082] The combustion assembly 200 of this invention provides a corresponding guide plate 205 at the third air outlet 204, which allows cooling air to enter the combustion chamber 202 in a specific direction and actively organizes a spanwise vortex. This vortex structure can stabilize the flame root position and interact with the circumferential vortex to form a three-dimensional annular vortex flame stabilization zone, thereby improving combustion stability.

[0083] In some embodiments, the combustion component 201 includes a housing 206 and a flame tube 208.

[0084] The third air inlet 207 is located in the casing 206.

[0085] The flame tube 208 is located inside the casing 206. The outer peripheral surface of the flame tube 208 is spaced apart from the inner peripheral surface of the casing 206 to define the cooling chamber 203. The third air inlet 207 is connected to the cooling chamber 203. The flame tube 208 is provided with a combustion chamber 202.

[0086] Multiple third air outlets 204 are spaced apart in the flame tube 208, connecting the cooling chamber 203 and the combustion chamber 202.

[0087] In this embodiment, the annular gap between the casing 206 and the flame tube 208 forms a cooling chamber 203. External air enters the cooling chamber 203 through a third air inlet 207 located on the casing 206, and then flows into the combustion chamber 202 inside the flame tube 208 through multiple third air outlets 204 spaced apart on the wall of the flame tube 208, providing some of the air required for combustion and also participating in airflow organization.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-temperature resistant nozzle for strong mixing of hydrogen, characterized in that, include: The housing (1) is provided with a jet nozzle (11); A hydrogen supply pipe (2) is disposed inside the housing (1) and spaced apart from the housing (1) to form an inner cavity (121). The hydrogen supply pipe (2) is provided with a plurality of hydrogen outlets (21). The outer peripheral wall of the hydrogen supply pipe (2) is spaced apart from the inner peripheral wall of the jet nozzle (11) to form a first air outlet (31). Multiple first air inlets (32) are circumferentially spaced around the housing (1) and communicate with the inner cavity (121); The first air inlet (32) extends tangentially along the inner cavity (121), the airflow flowing out of the first air inlet (32) forms a first vortex rotating in a first circumferential direction, and the airflow flowing out of the hydrogen outlet (21) forms a second vortex rotating in a second circumferential direction, the second circumferential direction being opposite to the first circumferential direction.

2. The high-temperature hydrogen nozzle with strong mixing as described in claim 1, characterized in that, The housing (1) includes an outer shell (131) and an inner shell (132), the outer shell (131) is fitted onto the inner shell (132), and the outer shell (131) and the inner shell (132) are spaced apart to form an outer cavity (122). Multiple second air inlets (41) are provided on the outer casing (131) and communicate with the outer cavity (122); The jet nozzle (11) penetrates the shell wall of the outer shell (131) and the shell wall of the inner shell (132), thereby forming a second air outlet (42) on the inner peripheral wall of the jet nozzle (11) that communicates with the outer cavity (122).

3. The high-temperature hydrogen nozzle with strong mixing as described in claim 1, characterized in that, The housing (1) includes a cylindrical part (14) and a spherical part (15). The spherical part (15) is located at one end of the cylindrical part (14). The air nozzle (11) is located at the junction of the cylindrical part (14) and the spherical part (15). A portion of the air nozzle (11) is located in the cylindrical part (14), and another portion of the air nozzle (11) is located in the spherical part (15).

4. The high-temperature hydrogen nozzle with strong mixing according to claim 1, characterized in that, The hydrogen supply pipe (2) includes a cylindrical section (22) and a nozzle section (23). The cylindrical section (22) is located at one end of the nozzle section (23), and the nozzle section (23) is inclined relative to the cylindrical section (22) and extends toward the jet nozzle (11).

5. The high-temperature hydrogen nozzle with strong mixing according to claim 4, characterized in that, The nozzle section (23) includes an end plate (231), and the hydrogen outlet (21) is disposed on the end plate (231). A plurality of hydrogen outlets (21) are arranged circumferentially around the end plate (231). The center line of the hydrogen outlet (21) is inclined relative to the axial direction of the nozzle section (23) so that the ejected gas flow forms the second vortex.

6. The high-temperature hydrogen nozzle with strong mixing according to claim 2, characterized in that, The high-temperature resistant hydrogen nozzle with strong mixing capacity includes: A heat-conducting plate (5) is disposed in the outer cavity (122) and is connected to both the outer shell (131) and the inner shell (132). A plurality of heat-conducting plates (5) are arranged circumferentially around the inner shell (132).

7. The high-temperature hydrogen nozzle with strong mixing according to claim 3, characterized in that, The high-temperature resistant hydrogen nozzle with strong mixing capacity includes: The fastener (6) is fixedly connected to the other end of the cylindrical part (14), and the fastener (6) is provided with a plurality of mounting holes (61).

8. The high-temperature hydrogen nozzle with strong mixing according to claim 7, characterized in that, The high-temperature resistant hydrogen nozzle with strong mixing capacity includes: A connecting pipe (7) is provided on the side of the fixing member (6) away from the cylindrical part (14) and is connected to the hydrogen supply pipe (2).

9. A combustion assembly, characterized in that, include: The high-temperature hydrogen nozzle with strong mixing as described in any one of claims 1-8; The combustion component (201) includes a separate combustion chamber (202) and a cooling chamber (203), wherein the combustion chamber (202) is disposed within the cooling chamber (203); Multiple high-temperature hydrogen nozzles with strong mixing are arranged around the combustion component (201) in a circumferential manner, and the jet nozzle (11) is installed in the combustion chamber (202). The center line of the jet nozzle (11) intersects the radial direction of the combustion chamber (202), and the airflow ejected from the multiple jet nozzles (11) forms a circumferential vortex in the combustion chamber (202).

10. The combustion assembly according to claim 9, characterized in that, The combustion assembly includes: Multiple third air outlets (204) connect the cooling chamber (203) and the combustion chamber (202); Multiple guide plates (205) are disposed in the combustion chamber (202) and correspond one-to-one with multiple third air outlets (204) to guide the airflow flowing out from the third air outlets (204) to form a spanwise vortex.

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