Hydrogen fuel combustion chamber and aero-engine

Abstract

The invention relates to the technical field of combustion chamber design, and discloses a hydrogen fuel combustion chamber and an aero-engine, the hydrogen fuel combustion chamber comprises a casing, a flame tube, a mixing hopper and a hydrogen fuel pipeline, the flame tube and the casing are arranged at an interval to form an air flowing cavity, and a combustion cavity is formed in the flame tube; the mixing hopper comprises an inner wall and an outer wall, a first hydrogen fuel channel is formed between the inner wall and the outer wall, a first spraying hole is formed in the outer wall and communicates with the combustion cavity and the first hydrogen fuel channel, an air channel is defined in the inner wall, and the air channel communicates with the air flowing cavity and the combustion cavity; the hydrogen fuel pipeline is communicated with hydrogen fuel and the first hydrogen fuel channel. By arranging the mixing hopper, air and hydrogen fuel enter the combustion cavity through the mixing hopper, so that the hydrogen fuel enters the combustion cavity and then is more quickly mixed with the inflow air; hydrogen fuel is sprayed out from multiple directions through the multiple first spraying holes, the size of a hydrogen local high-concentration area can be reduced, and therefore local hot spots are reduced, and pollutant emission is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of combustion chamber design, and in particular to a hydrogen fuel combustion chamber and an aircraft engine. Background Art

[0002] With the rapid development of new energy technologies, the hybrid power of hydrogen fuel engines and hydrogen fuel cells will be the main development direction of hydrogen aviation in the future. At the same time, hydrogen fuel engines have also made significant technological progress in reducing pollutant emissions and stabilizing combustion. The core of hydrogen fuel aircraft engine design is the design of the hydrogen fuel aircraft engine combustion chamber. Unlike core engine components such as turbines and compressors, which do not require much adaptation to the transition from aviation kerosene to hydrogen fuel, the combustion chamber needs to make many improved designs for hydrogen fuel, which has very different physical and chemical properties from aviation kerosene.

[0003] However, the mixing uniformity of hydrogen and air in existing hydrogen fuel combustion chambers is poor, and local hot spots exist in the combustion chamber. Summary of the invention

[0004] In view of this, the present invention provides a hydrogen fuel combustion chamber and an aircraft engine to solve the problem of poor mixing uniformity of hydrogen and air and the existence of local hot spots in the combustion chamber.

[0005] In the first aspect, the present invention provides a hydrogen fuel combustion chamber, comprising: a casing; a flame tube, the flame tube is spaced apart from the casing, an air flow cavity is formed between the flame tube and the casing, and a combustion cavity is formed in the flame tube; a mixing bucket, the mixing bucket is arranged on the flame tube, the mixing bucket comprises an inner wall and an outer wall, a first hydrogen fuel channel is formed between the inner wall and the outer wall, a first spray hole is opened on the outer wall, a plurality of the first spray holes are arranged, two ends of the first spray hole are respectively connected to the combustion cavity and the first hydrogen fuel channel, an air channel is formed in the inner wall, and two ends of the air channel are respectively connected to the air flow cavity and the combustion cavity; a hydrogen fuel pipeline, the hydrogen fuel pipeline is arranged on the casing, one end of the hydrogen fuel pipeline is suitable for connecting hydrogen fuel, and the other end of the hydrogen fuel pipeline is connected to the first hydrogen fuel channel.

[0006] Beneficial effects: By setting a mixing bucket, both air and hydrogen fuel enter the combustion chamber through the mixing bucket, so that the hydrogen fuel enters the combustion chamber and mixes with the inflowing air more quickly, thereby making the hydrogen fuel and air mixed more evenly and reducing the problem of local hot spots; by setting a plurality of first spray holes, hydrogen fuel is sprayed from multiple directions, which is beneficial to reducing the size of the local high concentration area of ​​hydrogen, thereby reducing local hot spots and reducing pollutant emissions.

[0007] In an optional embodiment, the mixing bucket further includes a first flow limiting structure, the first flow limiting structure is disposed in the first hydrogen fuel channel, and the first flow limiting structure is suitable for narrowing a channel cross-section of the first hydrogen fuel channel.

[0008] Beneficial effect: By setting the first flow limiting structure, the channel cross-section of the first hydrogen fuel channel is narrowed, the flow rate of the hydrogen fuel is accelerated, and the mixing of the hydrogen fuel and the air is made more uniform.

[0009] In an optional embodiment, a plurality of the first spray holes are evenly spaced apart along the circumference of the mixing bucket, and / or a plurality of the first spray holes are evenly spaced apart along the axial direction of the mixing bucket.

[0010] Beneficial effect: Several first spray holes are evenly spaced along the circumference or axial direction of the mixing bucket, which further improves the mixing degree of hydrogen fuel and air, and is beneficial to reducing the size of the local high concentration area of ​​hydrogen, thereby reducing local hot spots and reducing pollutant emissions.

[0011] In an optional embodiment, the cross-sectional area of ​​the first spray hole is S1, which satisfies 1 mm 2 ≤S1≤2mm 2 .

[0012] Beneficial effect: By limiting the cross-sectional area of ​​the first spray hole, the uniformity of the hydrogen fuel in the first spray hole is ensured while the speed of the hydrogen fuel sprayed out from the first spray hole is ensured.

[0013] In an optional embodiment, a second hydrogen fuel channel is formed in the casing, and the hydrogen fuel combustion chamber also includes a connecting structure, wherein both ends of the connecting structure are respectively connected to the casing and the flame tube, and the connecting structure is provided with a second spray hole, wherein both ends of the second spray hole are respectively connected to the second hydrogen fuel channel and the combustion chamber, and a plurality of the second spray holes are arranged at intervals.

[0014] Beneficial effect: By setting up the connecting structure, multi-stage combustion of hydrogen fuel is achieved through the second spray hole, and the mixing uniformity of hydrogen fuel and air is further improved.

[0015] In an optional embodiment, the hydrogen fuel combustion chamber further includes a second flow limiting structure, the second flow limiting structure is disposed in the second hydrogen fuel channel, and the second flow limiting structure is suitable for narrowing the channel cross-section of the second hydrogen fuel channel.

[0016] Beneficial effect: By setting the second flow limiting structure, the cross section of part of the second hydrogen fuel channel is narrowed, the flow rate of the hydrogen fuel at the second nozzle hole is increased, and the mixing of hydrogen fuel and air is made more uniform.

[0017] In an optional embodiment, the cross-sectional area of ​​the second nozzle hole is S2, which satisfies 0.8 mm 2 ≤S2≤1.4mm 2 .

[0018] Beneficial effect: By limiting the cross-sectional area of ​​the second spray hole, the uniformity of the hydrogen fuel in the second spray hole is ensured while the speed of the hydrogen fuel sprayed out from the second spray hole is ensured.

[0019] In an optional embodiment, the hydrogen fuel pipeline includes a straight pipeline and an annular pipeline, the straight pipeline is arranged on the flame tube, one end of the straight pipeline is suitable for connecting with hydrogen fuel, the other end of the straight pipeline is connected to the annular pipeline, and the annular pipeline is connected to the first hydrogen fuel channel.

[0020] Beneficial effect: The hydrogen fuel enters the annular pipeline from the straight pipeline, which increases the uniformity of the hydrogen fuel, and further flows into the first hydrogen fuel channel after being fully decelerated and uniform, thereby making the pressure at various locations in the first hydrogen fuel channel the same.

[0021] In an optional embodiment, the cross-sectional area of ​​the annular pipeline is S3, which satisfies 2mm 2 ≤S3≤8mm 2 .

[0022] Beneficial effect: By limiting the cross-sectional area of ​​the annular pipeline, the uniformity of the hydrogen fuel in the annular pipeline is ensured while the flow speed of the hydrogen fuel in the annular pipeline is ensured.

[0023] In a second aspect, the present invention also provides an aircraft engine, comprising the above-mentioned hydrogen fuel combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a three-dimensional isometric view of a hydrogen fuel combustion chamber according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of gas flow in a hydrogen fuel combustion chamber according to an embodiment of the present invention;

[0027] Figure 3 It is a structural schematic diagram of a mixing bucket according to an embodiment of the present invention;

[0028] Figure 4 Schematic diagram of the structure of the connection structure of an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 10. Casing; 11. Second hydrogen fuel channel; 20. Flame tube; 21. Mixing hole; 22. Main combustion hole; 30. Mixing bucket; 31. Inner wall; 32. Outer wall; 321. First spray hole; 33. First flow limiting structure; 34. First hydrogen fuel channel; 35. Air channel; 40. Hydrogen fuel pipeline; 41. Straight pipeline; 42. Annular pipeline; 50. Connecting structure; 51. Second spray hole; 60. Second flow limiting structure; 71. Air flow chamber; 72. Combustion chamber. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] Combine the following Figures 1 to 4 , describing an embodiment of the present invention.

[0033] According to an embodiment of the present invention, on the one hand, a hydrogen fuel combustion chamber is provided, comprising: a casing 10, a flame tube 20, a mixing bucket 30 and a hydrogen fuel pipeline 40, wherein the flame tube 20 is spaced apart from the casing 10, an air flow cavity 71 is formed between the flame tube 20 and the casing 10, and a combustion cavity 72 is formed in the flame tube 20; the mixing bucket 30 is arranged on the flame tube 20, and the mixing bucket 30 comprises an inner wall 31 and an outer wall 32, a first hydrogen fuel channel 34 is formed between the inner wall 31 and the outer wall 32, and ... A first spray hole 321 is provided on the wall 32, and a plurality of first spray holes 321 are provided. Both ends of the first spray hole 321 are respectively connected to the combustion chamber 72 and the first hydrogen fuel channel 34. An air channel 35 is enclosed in the inner wall 31, and both ends of the air channel 35 are respectively connected to the air flow chamber 71 and the combustion chamber 72. A hydrogen fuel pipeline 40 is provided on the casing 10, and one end of the hydrogen fuel pipeline 40 is suitable for connecting hydrogen fuel, and the other end of the hydrogen fuel pipeline 40 is connected to the first hydrogen fuel channel 34.

[0034] The hydrogen fuel combustion chamber of the present embodiment is applied with a mixing bucket 30, so that both air and hydrogen fuel enter the combustion chamber 72 through the mixing bucket 30, so that the hydrogen fuel enters the combustion chamber 72 and mixes with the inflowing air more quickly, thereby making the hydrogen fuel and air mix more evenly and reducing the problem of local hot spots; by providing a plurality of first spray holes 321, hydrogen fuel is sprayed from multiple directions, which is beneficial to reducing the size of the local high concentration area of ​​hydrogen, thereby reducing local hot spots and reducing pollutant emissions.

[0035] It should be noted that the hydrogen fuel combustion chamber of the present invention is an annular structure. Figure 1 The triaxial view of the hydrogen fuel combustion chamber of the embodiment of the present invention is one eighteenth of the full annular structure. Figure 1 The overall structure of the present invention can be obtained by arranging the structures shown in a circumferential array.

[0036] For details, please refer to Figure 1 A main combustion hole 22 and a mixing hole 21 are also provided on the flame tube 20. Part of the air enters the combustion chamber 72 through the main combustion hole 22 and the mixing hole 21 and is further mixed with the hydrogen fuel, thereby further improving the mixing uniformity of the hydrogen fuel and the air.

[0037] For further information, see Figure 2 , Figure 2 Schematic diagram of the flow of hydrogen fuel and air in this embodiment is shown. Figure 2 The dotted line in the figure indicates the direction of air flow. Figure 2 The solid line in the figure indicates the flow direction of hydrogen fuel.

[0038] Furthermore, a plurality of cooling holes are provided on the flame tube 20 , and part of the air enters the combustion chamber 72 through the cooling holes.

[0039] Specifically, in this embodiment, the mixing bucket 30 is a truncated cone structure.

[0040] It should be noted that those skilled in the art can adjust the shape of the blending bucket 30 according to actual needs.

[0041] It should be further explained that those skilled in the art may also adjust the shape of the first hydrogen fuel channel 34 according to actual needs.

[0042] In one embodiment, Figure 3 As shown, the blending bucket 30 further includes a first flow limiting structure 33 , which is disposed in the first hydrogen fuel channel 34 , and is suitable for narrowing the channel cross-section of the first hydrogen fuel channel 34 .

[0043] For details, please refer to Figure 3There are a plurality of first flow limiting structures 33 , and the plurality of first flow limiting structures 33 are evenly spaced. The hydrogen fuel passes through the gap between two adjacent first flow limiting structures 33 and is sprayed out from the first spray hole 321 .

[0044] It can be understood that the first current limiting structure 33 is a ring structure.

[0045] It is worth noting that, by providing the first flow limiting structure 33 , the channel cross section of the first hydrogen fuel channel 34 is narrowed, the flow rate of the hydrogen fuel is accelerated, and the mixing of the hydrogen fuel and the air is made more uniform.

[0046] In one embodiment, Figure 1 As shown, a plurality of first spray holes 321 are evenly spaced apart along the circumference of the mixing bucket 30 , and a plurality of first spray holes 321 are evenly spaced apart along the axial direction of the mixing bucket 30 .

[0047] It should be noted that those skilled in the art may, according to actual conditions, evenly space a plurality of first spray holes 321 only in the circumferential direction of the mixing bucket 30 or only in the axial direction of the mixing bucket 30 .

[0048] It is worth noting that the plurality of first spray holes 321 are evenly spaced along the circumference or axial direction of the mixing bucket 30, which further improves the mixing degree of hydrogen fuel and air, and is beneficial to reducing the size of the local high concentration area of ​​hydrogen, thereby reducing local hot spots and reducing pollutant emissions.

[0049] In one embodiment, the cross-sectional area of ​​the first spray hole 321 is S1, which satisfies 1 mm 2 ≤S1≤2mm 2 .

[0050] It is worth noting that by limiting the cross-sectional area of ​​the first spray hole 321 , the speed of the hydrogen fuel sprayed out of the first spray hole 321 is guaranteed while ensuring the uniformity of the hydrogen fuel in the first spray hole 321 .

[0051] It should be noted that when S1<1mm 2 When S1>2mm, the speed of hydrogen fuel spraying out from the first spray hole 321 is faster, but the uniformity of hydrogen fuel in the first spray hole 321 is too poor and does not meet the requirements; when S1>2mm 2 When the hydrogen fuel in the first injection hole 321 is uniform, the hydrogen fuel is well sprayed out from the first injection hole 321, but the speed at which the hydrogen fuel is sprayed out from the first injection hole 321 is too slow and does not meet the requirements.

[0052] In one embodiment, Figure 1 and Figure 4As shown, a second hydrogen fuel channel 11 is formed in the casing 10, and the hydrogen fuel combustion chamber also includes a connecting structure 50, the two ends of the connecting structure 50 are respectively connected to the casing 10 and the flame tube 20, and the connecting structure 50 is provided with a second spray hole 51, the two ends of the second spray hole 51 are respectively connected to the second hydrogen fuel channel 11 and the combustion chamber 72, and a plurality of second spray holes 51 are arranged at intervals.

[0053] For details, please refer to Figure 1 In this embodiment, nine second spray holes 51 are arranged at intervals.

[0054] It should be noted that those skilled in the art can adjust the number of the second spray holes 51 according to actual conditions.

[0055] It is worth noting that, by providing the connecting structure 50 , multi-stage combustion of hydrogen fuel is achieved through the second spray hole 51 , thereby further improving the mixing uniformity of hydrogen fuel and air.

[0056] In one embodiment, Figure 1 As shown, the hydrogen fuel combustion chamber further includes a second flow limiting structure 60 , which is disposed in the second hydrogen fuel channel 11 . The second flow limiting structure 60 is suitable for narrowing the channel cross section of the second hydrogen fuel channel 11 .

[0057] It should be noted that the second flow limiting structure 60 and the casing 10 may be integrally formed, and a portion of the casing 10 structure protrudes into the second hydrogen fuel channel 11 to form the second flow limiting structure 60 .

[0058] It should be noted that the second flow limiting structure 60 may also be provided separately from the casing 10 , and the flow rate of the hydrogen fuel at the second spray hole 51 may be controlled by adjusting the size of the second flow limiting structure 60 .

[0059] It is worth noting that, by providing the second flow limiting structure 60 , a partial channel cross section of the second hydrogen fuel channel 11 is narrowed, the flow rate of the hydrogen fuel at the second spray hole 51 is increased, and the mixing of the hydrogen fuel and the air is made more uniform.

[0060] In one embodiment, the cross-sectional area of ​​the second spray hole 51 is S2, which satisfies 0.8 mm 2 ≤S2≤1.4mm 2 .

[0061] It is worth noting that by limiting the cross-sectional area of ​​the second spray hole 51 , the speed of the hydrogen fuel sprayed out of the second spray hole 51 is guaranteed while ensuring the uniformity of the hydrogen fuel in the second spray hole 51 .

[0062] It should be noted that when S2 < 0.8 mm 2When S2>1.4mm, the speed of hydrogen fuel spraying out from the second spray hole 51 is faster, but the uniformity of hydrogen fuel in the second spray hole 51 is too poor and does not meet the requirements; when S2>1.4mm 2 At this time, the uniformity of the hydrogen fuel in the second injection hole 51 is good, but the speed at which the hydrogen fuel is sprayed from the second injection hole 51 is too slow and does not meet the requirements.

[0063] In one embodiment, Figure 1 and Figure 3 As shown, the hydrogen fuel pipeline 40 includes a straight pipeline 41 and an annular pipeline 42. The straight pipeline 41 is arranged on the flame tube 20. One end of the straight pipeline 41 is suitable for connecting hydrogen fuel, and the other end of the straight pipeline 41 is connected to the annular pipeline 42. The annular pipeline 42 is connected to the first hydrogen fuel channel 34.

[0064] Specifically, in this embodiment, the straight pipeline 41 is a circular straight pipeline.

[0065] Furthermore, a plurality of straight pipelines 41 may be provided, and the plurality of straight pipelines 41 are all connected to the annular pipeline 42 .

[0066] Furthermore, the diameter of the circular straight pipe is D, 1mm≤D≤3mm.

[0067] It is worth noting that the hydrogen fuel enters the annular pipeline 42 from the straight pipeline 41, which increases the uniformity of the hydrogen fuel, and further flows into the first hydrogen fuel channel 34 after being fully decelerated and uniform, thereby making the pressure at various locations in the first hydrogen fuel channel 34 the same.

[0068] In one embodiment, Figure 3 As shown, the cross-sectional area of ​​the annular pipeline 42 is S3, which satisfies the 2mm 2 ≤S3≤8mm 2 .

[0069] It is worth noting that by limiting the cross-sectional area of ​​the annular pipeline 42 , the flow rate of the hydrogen fuel in the annular pipeline 42 is guaranteed while ensuring the uniformity of the hydrogen fuel in the annular pipeline 42 .

[0070] It should be noted that when S3 < 2 mm 2 When S3>8mm, the flow speed of hydrogen fuel in the annular pipeline 42 is faster, but the uniformity of hydrogen fuel in the annular pipeline 42 is too poor and does not meet the requirements; when S3>8mm 2 At this time, the uniformity of the hydrogen fuel in the annular pipeline 42 is good, but the flow speed of the hydrogen fuel in the annular pipeline 42 is too slow and does not meet the requirements.

[0071] When the hydrogen fuel combustion chamber of this embodiment is used, part of the hydrogen fuel enters the annular pipeline 42 from the straight pipeline 41, and then enters the first hydrogen fuel channel 34 in the mixing bucket 30, and flows into the combustion chamber 72 through the first nozzle 321; part of the hydrogen fuel enters the connecting structure 50 from the second hydrogen fuel channel 11, and flows into the combustion chamber 72 through the second nozzle 51; part of the air enters the air channel 35 in the mixing bucket 30 from the air flow chamber 71 between the casing 10 and the flame tube 20, and then flows into the combustion chamber 72 to be mixed with the hydrogen fuel, and part of the air enters the combustion chamber 72 from the air flow chamber 71 between the casing 10 and the flame tube 20 through the mixing hole 21 and the main combustion hole 22 opened on the flame tube 20, and is mixed with the hydrogen fuel; the fully mixed gas is fully burned in the combustion chamber 72, and the combustion gas generated by the combustion flows into the turbine through the outlet of the combustion chamber to perform work.

[0072] According to an embodiment of the present invention, on the other hand, there is provided an aircraft engine comprising the above-mentioned hydrogen fuel combustion chamber.

[0073] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the present invention.

Claims

1. A hydrogen fuel combustion chamber, characterized in that: include: Receiver (10); A flame tube (20), wherein the flame tube (20) and the casing (10) are spaced apart, an air flow cavity (71) is formed between the flame tube (20) and the casing (10), and a combustion cavity (72) is formed inside the flame tube (20); A mixing bucket (30), the mixing bucket (30) is arranged on the flame tube (20), the mixing bucket (30) comprises an inner wall (31) and an outer wall (32), a first hydrogen fuel channel (34) is formed between the inner wall (31) and the outer wall (32), a first spray hole (321) is opened on the outer wall (32), a plurality of first spray holes (321) are arranged, two ends of the first spray hole (321) are respectively connected to the combustion chamber (72) and the first hydrogen fuel channel (34), an air channel (35) is formed in the inner wall (31), and two ends of the air channel (35) are respectively connected to the air flow chamber (71) and the combustion chamber (72); A hydrogen fuel pipeline (40), wherein the hydrogen fuel pipeline (40) is arranged on the casing (10), one end of the hydrogen fuel pipeline (40) is suitable for connecting with hydrogen fuel, and the other end of the hydrogen fuel pipeline (40) is connected with the first hydrogen fuel channel (34).

2. The hydrogen fuel combustion chamber according to claim 1, characterized in that: The mixing bucket (30) further comprises a first flow limiting structure (33), wherein the first flow limiting structure (33) is arranged in the first hydrogen fuel channel (34), and the first flow limiting structure (33) is suitable for narrowing the channel cross section of the first hydrogen fuel channel (34).

3. The hydrogen fuel combustion chamber according to claim 1, characterized in that: A plurality of the first spray holes (321) are evenly spaced apart along the circumference of the mixing bucket (30), and / or a plurality of the first spray holes (321) are evenly spaced apart along the axial direction of the mixing bucket (30).

4. The hydrogen fuel combustion chamber according to claim 1, characterized in that: The cross-sectional area of ​​the first spray hole (321) is S1, which satisfies 1 mm 2 ≤S1≤2mm 2 .

5. The hydrogen fuel combustion chamber according to any one of claims 1 to 4, characterized in that: A second hydrogen fuel passage (11) is formed in the casing (10), and the hydrogen fuel combustion chamber further comprises a connecting structure (50), the two ends of the connecting structure (50) are respectively connected to the casing (10) and the flame tube (20), the connecting structure (50) is provided with a second spray hole (51), the two ends of the second spray hole (51) are respectively connected to the second hydrogen fuel passage (11) and the combustion chamber (72), and a plurality of the second spray holes (51) are arranged at intervals.

6. The hydrogen fuel combustion chamber according to claim 5, characterized in that: The hydrogen fuel combustion chamber further comprises a second flow limiting structure (60), wherein the second flow limiting structure (60) is arranged in the second hydrogen fuel channel (11), and the second flow limiting structure (60) is suitable for narrowing the channel cross section of the second hydrogen fuel channel (11).

7. The hydrogen fuel combustion chamber according to claim 5, characterized in that: The cross-sectional area of ​​the second spray hole (51) is S2, which satisfies 0.8 mm 2 ≤S2≤1.4mm 2 .

8. The hydrogen fuel combustion chamber according to any one of claims 1 to 4, characterized in that: The hydrogen fuel pipeline (40) comprises a straight pipeline (41) and an annular pipeline (42); the straight pipeline (41) is arranged on the flame tube (20); one end of the straight pipeline (41) is suitable for connecting with hydrogen fuel; the other end of the straight pipeline (41) is connected with the annular pipeline (42); and the annular pipeline (42) is connected with the first hydrogen fuel channel (34).

9. The hydrogen fuel combustion chamber according to claim 8, characterized in that: The cross-sectional area of ​​the annular pipeline (42) is S3, which satisfies the requirement of 2 mm 2 ≤S3≤8mm 2 .

10. An aircraft engine, characterized in that: A hydrogen fuel combustion chamber comprising the hydrogen fuel combustion chamber as claimed in any one of claims 1 to 9.

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