A hydrogen fuel multi-point injection center-staged single-head combustion chamber

Abstract

The application provides a hydrogen fuel multi-point injection center staged single head combustion chamber, which comprises an outer cylinder, a hydrogen inlet pipe, a combustion head, a micro-mixing nozzle and a swirler. One end of the outer cylinder is provided with an air inlet, and the other end is provided with a combustion chamber outlet; the combustion chamber outlet is close to the center of the outer cylinder to form a necking; the hydrogen inlet pipe is embedded on the outer cylinder; the combustion head is arranged in the inner part of the outer cylinder, and the inner part of the combustion head has a hydrogen containing cavity which is communicated with the hydrogen inlet pipe; the micro-mixing nozzle has a plurality of micro-mixing nozzles which are distributed on the combustion head to form a main combustion stage; and the swirler is arranged at the center position of the combustion head to form a pre-combustion stage. The hydrogen fuel multi-point injection center staged single head combustion chamber provided by the application forms a center staged mode through the main combustion stage and the pre-combustion stage, and can effectively reduce the emission of nitrogen oxides.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen fuel combustion chamber, and particularly relates to a hydrogen fuel multi-point injection center staged single-head combustion chamber. BACKGROUND

[0002] The design of the hydrogen fuel combustion chamber has various technical paths in the prior art, and usually adopts micro-premixed combustion, steam injection-recovery system, etc., to stabilize the combustion process and reduce the risk of natural and backfire through the mixing ratio and mode of air and hydrogen.

[0003] The hydrogen fuel single-head combustion chamber adopting the micro-premixed combustion mode is prone to backfire, and the safety of the combustion chamber needs to be improved. Compared with the micro-premixed combustion, the micro-diffusion combustion can prevent spontaneous combustion and backfire.

[0004] However, the micro-diffusion combustion mode has high NOx emission.

[0005] Therefore, how to provide a combustion chamber capable of reducing nitrogen oxide emission is a technical problem to be solved by those skilled in the art. SUMMARY

[0006] The present application provides a hydrogen fuel multi-point injection center staged single-head combustion chamber to solve the defect of high nitrogen oxide emission in the prior art and reduce the nitrogen oxide emission of the combustion chamber.

[0007] The present application provides a hydrogen fuel multi-point injection center staged single-head combustion chamber, which comprises an outer cylinder, a hydrogen gas inlet pipe, a combustion head, a micro-mixing nozzle and a swirler.

[0008] One end of the outer cylinder is provided with an air inlet, and the other end is provided with a combustion chamber outlet; the combustion chamber outlet is close to the center of the outer cylinder to form a neck; the hydrogen gas inlet pipe is embedded on the outer cylinder; the combustion head is arranged inside the outer cylinder, and the inside of the combustion head has a hydrogen gas containing cavity, which is in communication with the hydrogen gas inlet pipe; the micro-mixing nozzle has a plurality of micro-mixing nozzles, which are distributed on the combustion head to form a main combustion stage; and the swirler is arranged at the center position of the combustion head to form a pre-combustion stage.

[0009] According to the hydrogen fuel multi-point injection center staged single-head combustion chamber provided by the present application, one side of the combustion head is an air containing cavity, and the other side is a combustion cavity; the outer periphery of the micro-mixing nozzle is provided with a plurality of first hydrogen gas injection holes, the micro-mixing nozzle penetrates the hydrogen gas containing cavity, the first hydrogen gas injection holes are in communication with the hydrogen gas containing cavity, and the two ends of the micro-mixing nozzle are in communication with the air containing cavity and the combustion cavity, respectively.

[0010] The hydrogen fuel multi-point injection center staged single head combustion chamber provided by the application, the distance between the first hydrogen injection hole and the combustion cavity is a, and the distance between the first hydrogen injection hole and the air containing cavity is b, a is less than b.

[0011] The hydrogen fuel multi-point injection center staged single head combustion chamber provided by the application, the first hydrogen injection holes of adjacent micro-mixing injection pipes are arranged at intervals.

[0012] The hydrogen fuel multi-point injection center staged single head combustion chamber provided by the application, the swirl generator comprises: a swirl pipe arranged through the combustion head; swirl vanes arranged inside the swirl pipe; a pre-combustion hydrogen pipe in communication with the hydrogen inlet pipe, and a plurality of second hydrogen injection holes are arranged on the outer periphery of the pre-combustion hydrogen pipe, and the second hydrogen injection holes are arranged corresponding to the air injection ports of the swirl vanes.

[0013] The hydrogen fuel multi-point injection center staged single head combustion chamber provided by the application further comprises a multi-channel diffuser arranged in the outer cylinder and close to the air inlet, so as to reduce the flow rate and increase the static pressure of the air flowing into the combustion chamber.

[0014] The hydrogen fuel multi-point injection center staged single head combustion chamber provided by the application further comprises a cooling structure for cooling the combustion chamber.

[0015] The hydrogen fuel multi-point injection center staged single head combustion chamber provided by the application, the cooling structure comprises a plurality of cooling pipes, the cooling pipes pass through the hydrogen containing cavity, one end of the cooling pipes is in communication with the air containing cavity, and the other end of the cooling pipes is in communication with the combustion cavity.

[0016] The hydrogen fuel multi-point injection center staged single head combustion chamber provided by the application further comprises an inner cylinder arranged inside the outer cylinder and having a gap between the outer cylinder, and the combustion head is connected to the inner cylinder.

[0017] The hydrogen fuel multi-point injection center staged single head combustion chamber provided by the application, both ends of the micro-mixing injection pipe are provided with chamfers.

[0018] The application provides a hydrogen fuel multi-point injection center staged single head combustion chamber, which is characterized by the following: one end of an outer cylinder is provided with an air inlet for providing air; the other end of the outer cylinder is provided with a burner outlet, and the combustion chamber outlet is close to the center of the outer cylinder to form a necked portion; a hydrogen gas inlet pipe is embedded on the outer cylinder; a combustion head is arranged in the inner portion of the outer cylinder, and the combustion head has a hydrogen gas containing cavity in the inner portion; the hydrogen gas containing cavity is communicated with the hydrogen gas inlet pipe; a plurality of micro-mixing injection pipes are arranged on the combustion head to form a main combustion stage; and a swirler is arranged at the center position of the combustion head to form a pre-combustion stage, so that the center staged mode is formed through the main combustion stage and the pre-combustion stage, and the emission of nitrogen oxides can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0020] Figure 1 is a semi-sectional schematic view of the hydrogen fuel multi-point injection center staged single head combustion chamber provided by the application.

[0021] Figure 2 is a semi-sectional front view of the hydrogen fuel multi-point injection center staged single head combustion chamber provided by the application.

[0022] Figure 3 is Figure 2 A-A sectional view in the figure.

[0023] Figure 4 is a structural schematic view of the micro-mixing injection pipe in the application.

[0024] Figure 5 is a front view of the micro-mixing injection pipe in the application.

[0025] Figure 6 is Figure 5 C-C sectional view in the figure.

[0026] Figure 7 is a front view of the swirler in the application.

[0027] Figure 8 is Figure 7 B-B sectional view in the figure.

[0028] Reference numerals: 1. Outer cylinder; 2. Hydrogen inlet pipe; 3. Combustion head; 4. Micro-mixing nozzle; 5. Swirl generator; 51. Swirl pipe; 52. Swirl blade; 53. Pre-combustion hydrogen pipe; 6. Multi-channel diffuser; 7. Cooling pipe; 8. Inner cylinder; 10. Air inlet; 20. Combustion outlet; 30. First hydrogen nozzle; 40. Second hydrogen nozzle; 100. Hydrogen receiving chamber; 200. Air receiving chamber; 300. Combustion chamber. Detailed Implementation

[0029] 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.

[0030] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] The following is combined with Figures 1-7 The present invention describes a centrally staged single-head combustion chamber for multi-point hydrogen fuel injection, comprising an outer cylinder 1, a hydrogen inlet pipe 2, a combustion head 3, a micro-mixing nozzle 4, and a swirl generator 5.

[0032] like Figure 1 and Figure 2 As shown, one end of the outer cylinder 1 is provided with an air inlet 10, allowing external air to enter the combustion chamber. The other end of the outer cylinder 1 is provided with a burner outlet 20; and the burner outlet 20 is close to the center of the outer cylinder 1, forming a constriction; this design helps to guide the airflow generated by combustion and improve combustion efficiency.

[0033] The hydrogen inlet pipe 2 is embedded in the outer cylinder 1 and is used to deliver hydrogen to the combustion chamber. The burner head 3 is located inside the outer cylinder 1 and has a hydrogen receiving cavity 100 inside. The hydrogen receiving cavity 100 is connected to the hydrogen inlet pipe 2 to ensure that hydrogen can smoothly enter the burner head.

[0034] likeFigure 2 and Figure 3 As shown in FIG. 1, the micro-mixing injector 4 has multiple, multiple micro-mixing injectors 4 are distributed on the combustion head 3 to form a main combustion stage; when the hydrogen enters the hydrogen containing cavity 100 through the hydrogen inlet pipe 2, the hydrogen will be injected into the combustion chamber through the micro-mixing injector 4. Due to the multiple distribution points of the micro-mixing injector 4, multi-point injection of hydrogen can be achieved, thereby increasing the mixing area of hydrogen and air and improving the combustion efficiency. In order to make the combustion more uniform, the multiple micro-mixing injectors 4 are usually uniformly distributed.

[0035] The swirler 5 is arranged at the center of the combustion head 3 to form a pre-combustion stage. The swirler 5 functions to form a strong vortex flow of air and hydrogen entering the combustion chamber in the pre-combustion stage area by rotating the airflow. This vortex flow helps to further mix the air and hydrogen and improve the mixing uniformity. In the pre-combustion stage area, due to the more uniform mixing of air and hydrogen and the faster airflow speed, ignition and combustion are more likely to occur. The heat and flame generated by the pre-combustion stage can further promote the combustion of the main combustion stage, making the entire combustion process more stable and efficient, thereby reducing the emission of nitrogen oxides.

[0036] As shown in FIG. 1, the micro-mixing injector 4 has multiple, multiple micro-mixing injectors 4 are distributed on the combustion head 3 to form a main combustion stage; when the hydrogen enters the hydrogen containing cavity 100 through the hydrogen inlet pipe 2, the hydrogen will be injected into the combustion chamber through the micro-mixing injector 4. Due to the multiple distribution points of the micro-mixing injector 4, multi-point injection of hydrogen can be achieved, thereby increasing the mixing area of hydrogen and air and improving the combustion efficiency. In order to make the combustion more uniform, the multiple micro-mixing injectors 4 are usually uniformly distributed. Figure 1 and Figure 4 , Figure 5 and Figure 6 As shown in FIG. 1, the micro-mixing injector 4 has multiple, multiple micro-mixing injectors 4 are distributed on the combustion head 3 to form a main combustion stage; when the hydrogen enters the hydrogen containing cavity 100 through the hydrogen inlet pipe 2, the hydrogen will be injected into the combustion chamber through the micro-mixing injector 4. Due to the multiple distribution points of the micro-mixing injector 4, multi-point injection of hydrogen can be achieved, thereby increasing the mixing area of hydrogen and air and improving the combustion efficiency. In order to make the combustion more uniform, the multiple micro-mixing injectors 4 are usually uniformly distributed.

[0037] Specifically, 2-5 first hydrogen injection holes 30 can be arranged on the periphery of the same micro-mixing injector 4 and uniformly distributed in the circumferential direction, and diffusion combustion can be carried out at the end portion close to the combustion chamber 300, which can effectively reduce combustion oscillation.

[0038] The combustion process is as follows: air enters the air containing cavity 200 through the air inlet 10 of the outer cylinder 1, while hydrogen enters the hydrogen containing cavity 100 through the hydrogen inlet pipe 2 and is sprayed out through the first hydrogen spray holes 30 on the micro-mixing spray pipe 4. Inside the micro-mixing spray pipe 4, the sprayed hydrogen mixes with the air from the air containing cavity 200 to form a combustible mixture. The combustible mixture then enters the combustion cavity 300, where it is further mixed under the action of the vortex generated by the swirler 5 and ignites in the pre-combustion stage area. The heat and flame generated by the pre-combustion stage further promote the combustion of the main combustion stage, making the combustion process more stable and efficient, thereby reducing the emission of nitrogen oxides.

[0039] Therefore, the swirler 5 is located at the center of the combustion head 3, forming a pre-combustion stage. The design of the pre-combustion stage helps to ignite the mixture in advance, providing a stable ignition source for the entire combustion process.

[0040] As shown in Figure 6 In one possible embodiment of the present application, the distance between the first hydrogen spray holes 30 and the combustion cavity 300 is a, and the distance between the first hydrogen spray holes 30 and the air containing cavity 200 is b, a is less than b, and a is smaller. When a is smaller, the hydrogen sprayed from the first hydrogen spray holes 30 can enter the combustion cavity 300 more quickly, mix with the air and burn. This helps to reduce the diffusion distance of hydrogen in the air and improve the combustion efficiency. Smaller a can also ensure uniform distribution of hydrogen in the combustion cavity 300, thereby avoiding local uneven combustion or hot spots.

[0041] Therefore, since a is less than b, it means that the hydrogen sprayed from the first hydrogen spray holes 30 first enters the combustion cavity 300, rather than staying in the air containing cavity 200 for a long time. This design helps to ensure that the hydrogen mixes with the air quickly and burns in the combustion cavity 300, improving the combustion efficiency and stability, and reducing the emission of nitrogen oxides. In addition, this design can also reduce the diffusion distance of hydrogen in the air, reduce the risk of hydrogen leakage, and improve the safety of the system.

[0042] In one possible embodiment of the present application, the first hydrogen spray holes 30 of adjacent micro-mixing spray pipes 4 are spaced apart, and it should be understood that the first hydrogen spray holes 30 of adjacent micro-mixing spray pipes 4 do not correspond, ensuring that the flames between adjacent micro-mixing spray pipes 4 do not collide.

[0043] Specifically, the diameter d of the first hydrogen spray holes 30 can be 0.5-0.8 mm; the inner diameter r of the micro-pipe can be 5-6 mm; the outer diameter R of the micro-pipe can be 7-8 mm. The value of a can be selected as 1.2-1.6 mm.

[0044] As shown in Figure 7 and Figure 8As shown, in one possible embodiment of the present application, the swirler 5 includes a swirler tube 51, swirler vanes 52, and a pre-combustion hydrogen tube 53. The swirler tube 51 is disposed through the combustion head 3 and is designed to allow the gas or fluid to flow in a rotational manner, which helps to mix and enhance the combustion effect. The swirler vanes 52 are disposed inside the swirler tube 51 and their main function is to increase the rotational speed of the gas or fluid, thereby enhancing the mixing effect. When the hydrogen or other fuel gas passes through the swirler tube 51, the swirler vanes 52 will cause it to rotate, which helps to mix better with air or other oxidizing agents. The pre-combustion hydrogen tube 53 is in communication with the hydrogen inlet tube 2, and a plurality of second hydrogen injection holes 40 are formed on the outer periphery of the pre-combustion hydrogen tube 53. The second hydrogen injection holes 40 are correspondingly arranged with the injection ports of the swirler vanes 52. When the hydrogen is injected from the second hydrogen injection holes 40, it will directly encounter the rotational airflow generated by the swirler vanes 52, thereby achieving more effective mixing and helping the combustion of hydrogen and oxygen.

[0045] In the present application, the angle of the swirler vanes 52 can be set to 13°-14°. The number of vanes can be 9-10. The inner diameter of the swirler vanes rs: 9mm~10mm; the outer diameter of the swirler vanes Rs: 12mm~13mm.

[0046] In one possible embodiment of the present application, a multi-channel diffuser 6 is also included, which is disposed in the outer cylinder 1 and is arranged close to the air inlet 10. The multi-channel diffuser 6 is arranged to uniformly diffuse air into the air containing chamber 200. The main function of the multi-channel diffuser 6 is to adjust the pressure and distribute the flow of the incoming air through its multiple independent diffuser channels. This helps to ensure that the air has a uniform pressure distribution and flow distribution before entering the combustion head 3. In addition, during the diffusing process, the gas is pushed through gradually decreasing channels or nozzles to the high pressure side, thereby achieving an increase in gas pressure. This pressure increase helps to increase the air pressure in the combustion chamber, thereby promoting more complete combustion.

[0047] In one possible embodiment of the present application, a cooling structure is also included for cooling the combustion chamber. The cooling structure transfers the heat generated by combustion from the combustion chamber to the cooling medium through conduction, convection or radiation, etc., thereby achieving cooling of the combustion chamber. The cooling medium can be water, air or other liquids / gases, depending on the application and working environment of the combustion chamber. By effectively cooling the combustion chamber, it can be ensured that the temperature in the combustion chamber always remains within a controllable range, thereby preventing overheating and causing damage to the components or unstable combustion.

[0048] In an embodiment of the present application, the cooling structure comprises a plurality of cooling pipes 7, which pass through the hydrogen accommodating cavity 100 but are not in communication with the hydrogen accommodating cavity 100. One end of the cooling pipe 7 is in communication with the air accommodating cavity 200, and the other end is in communication with the combustion cavity 300. The cooling pipe 7 removes the heat generated in the combustion process by circulating a cooling medium (such as water, air or other liquid / gas).

[0049] The plurality of cooling pipes 7 are distributed between the plurality of micro-mixing injection pipes 4, which can achieve uniform combustion and cooling, effectively reduce the temperature inside the combustion chamber, and prevent damage to components or unstable combustion caused by high temperature.

[0050] In an embodiment of the present application, an inner cylinder 8 is further included, which is arranged inside the outer cylinder 1 and has a gap between the outer cylinder 1, and the combustion head 3 is connected to the inner cylinder 8. The inner cylinder 8 and the outer cylinder 1 form two flow channels therebetween, which facilitates the cooling of the combustion chamber.

[0051] In an embodiment of the present application, the two ends of the micro-mixing injection pipe 4 are provided with chamfers, and it should be understood that the openings of the two ends of the micro-mixing injection pipe 4 are inclined from the end portion to the axis, which can promote the mixing efficiency of hydrogen and air and effectively reduce combustion oscillation.

[0052] In summary, air enters the combustion chamber through the air inlet 10, most of which enters the combustion cavity of the inner cylinder 8, and a small part enters the two flow channels between the inner cylinder 8 and the outer cylinder 1 as cooling gas. Hydrogen enters the combustion chamber through the hydrogen inlet pipe 2 and is divided into a main combustion stage and a pre-combustion stage, and the hydrogen flow distribution ratio of the main combustion stage to the pre-combustion stage is (7-10):1. The main combustion stage hydrogen enters the hydrogen accommodating cavity 100 and is sprayed out through the first hydrogen injection hole 30 of the micro-mixing injection pipe 4, and the pre-combustion stage hydrogen flows into the swirler 5 and is sprayed out through the second hydrogen injection hole 40 of the swirler 5.

[0053] Therefore, the present application provides a hydrogen fuel multi-point injection center staged single head combustion chamber, which adopts a center staged structure, the flow distribution ratio of the main combustion stage to the pre-combustion stage is 7-10:1, the pre-combustion stage helps to generate the fuel atomization quality required for ignition and low-power working state, and meets the flow field characteristics required by design requirements such as ignition, lean stable combustion and high-efficiency combustion; the main combustion stage works in a large state, and matches with the pre-combustion stage through air / fuel to realize low pollution or high temperature rise combustion; the cooling structure is arranged on the combustion head 3 to cool the inner cylinder 8, which can reduce the NOx emission of the combustion chamber.

[0054] In the description of the embodiments of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0055] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "way", "specific way", or "some ways" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or way are included in at least one embodiment or way of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or way. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or ways in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or features of the different embodiments or ways described in the present application without contradiction.

[0056] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A hydrogen fuel multi-point injection, center-staged, single- head combustion chamber, characterized by, The application relates to a hydrogen-oxygen combustion chamber. The application comprises: an outer cylinder (1) provided with an air inlet (10) at one end and a combustion chamber outlet (20) at the other end; the combustion chamber outlet (20) is close to the center of the outer cylinder (1) and forms a necking portion; a hydrogen gas inlet pipe (2) embedded in the outer cylinder (1); a combustion head (3) arranged in the inner portion of the outer cylinder (1), wherein the inner portion of the combustion head (3) is provided with a hydrogen gas containing cavity (100) which is in communication with the hydrogen gas inlet pipe (2); a plurality of micro-mixing injection pipes (4) arranged on the combustion head (3) to form a main combustion stage; a swirler (5) arranged at the center of the combustion head (3) to form a pre-combustion stage; one side of the combustion head (3) is an air containing cavity (200) for storing and distributing air entering the combustion chamber; the other side is a combustion cavity (300) for hydrogen and oxygen mixing and combustion; the outer periphery of the micro-mixing injection pipe (4) is provided with a plurality of first hydrogen gas injection holes (30), the micro-mixing injection pipe (4) penetrates the hydrogen gas containing cavity (100), the first hydrogen gas injection holes (30) are in communication with the hydrogen gas containing cavity (100), and the two ends of the micro-mixing injection pipe (4) are in communication with the air containing cavity (200) and the combustion cavity (300) respectively; 2. The hydrogen-fueled, multi-point-injected, centrally-staged, single- head combustion chamber of claim 1, wherein, the distance between the first hydrogen gas injection hole (30) and the combustion cavity (300) is a, and the distance between the first hydrogen gas injection hole (30) and the air containing cavity (200) is b, wherein a is smaller than b.

3. The hydrogen-fueled, multi-point-injected, centrally-staged, single- head combustion chamber of claim 1, wherein, The first hydrogen gas injection holes (30) of adjacent micro-mixing injection pipes (4) are arranged at intervals. The swirler (5) comprises: a swirler pipe (51) arranged penetratingly on the combustion head (3); swirler blades (52) arranged in the inner portion of the swirler pipe (51); 4. The hydrogen-fueled, multi-point-injected, centrally-staged, single- head combustion chamber of claim 1, wherein, a pre-combustion hydrogen gas pipe (53) in communication with the hydrogen gas inlet pipe (2), wherein the outer periphery of the pre-combustion hydrogen gas pipe (53) is provided with a plurality of second hydrogen gas injection holes (40), and the second hydrogen gas injection holes (40) are arranged correspondingly to the injection ports of the swirler blades (52). The application further comprises:

5. The hydrogen-fueled, multi-point-injected, centrally-staged, single- head combustion chamber of claim 1, wherein, a multi-channel diffuser (6) arranged in the outer cylinder (1) and close to the air inlet (10). The application further comprises:

6. The hydrogen-fueled, multi-point-injected, centrally-staged, single- head combustion chamber of claim 5 wherein, a cooling structure for cooling the combustion chamber. The cooling structure comprises:

7. The hydrogen-fueled, multi-point-injected, center-staged, single- head combustion chamber of claim 1, wherein, a plurality of cooling pipes (7) penetrating the hydrogen gas containing cavity (100), wherein one end of the cooling pipe (7) is in communication with the air containing cavity (200), and the other end is in communication with the combustion cavity (300).

8. The hydrogen-fueled, multi-point-injected, centrally-staged, single- head combustion chamber of claim 1 wherein, The application further comprises an inner cylinder (8) arranged in the inner portion of the outer cylinder (1) and having a gap between the outer cylinder (1) and the inner cylinder (8), and the combustion head (3) is connected with the inner cylinder (8). The two ends of the micro-mixing injection pipe (4) are provided with chamfers.

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