Dual-fuel ring vortex combustor

Abstract

The invention provides a dual-fuel ring vortex combustor which comprises an annular structure formed by splicing a plurality of combustors, each combustor comprises a hydrogen pipeline, a gas collection tank and a U-shaped flame tube, at least one hydrogen hole, at least one kerosene nozzle and at least one air hole are formed in each U-shaped flame tube, the hydrogen holes are covered with the gas collection tanks, and the kerosene nozzles are arranged on the gas collection tanks. The hydrogen pipeline is communicated with the hydrogen hole through the gas collection tank. According to the dual-fuel ring vortex combustor, the ignition performance can be improved, combustion at the ignition nozzle can be enhanced, atomization of kerosene is further promoted, and the combustion efficiency and stable flame flowing can be improved; kerosene can be in full contact with hydrogen gas, so that more uniform mixing of double fuels is realized; and the guide plate is cooled, so that the ablation resistance of the high-temperature alloy of the guide plate is improved, and the service life of the high-temperature alloy of the guide plate is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of engines, and in particular to a dual-fuel annular vortex combustion chamber. Background Art

[0002] As a new type of flight power device, hydrogen fuel engine has its advantages. On the one hand, the product of hydrogen combustion is only water vapor, which can achieve zero carbon emissions. On the other hand, hydrogen has the characteristics of a large flammable range, a low flammable limit, and a small ignition energy. It has the opportunity to achieve a wider range of working conditions and higher power applications, and improve the thrust and efficiency of aircraft. Domestic and foreign scholars have conducted a lot of research on the combustion of hydrocarbon fuel mixed hydrogen from two aspects: basic theory and engineering design. Among them, the basic theory mainly studies the basic characteristics of the mixed fuel after hydrogen is added to hydrocarbon fuel, such as flame propagation speed, pollutant emissions, and flame stability, laying the foundation for engineering applications; and in terms of engineering design, according to the physical and combustion characteristics of hydrogen / mixed hydrogen fuel, the original traditional aviation kerosene combustion chamber was modified, and according to the combustion characteristics of hydrogen, a pure hydrogen / mixed hydrogen micro-scale head combustion chamber was creatively proposed.

[0003] The auxiliary power unit (APU) is a key part of the aircraft power system. It can independently provide electricity and compressed air. At the same time, a small amount of APU can also provide additional thrust to the aircraft. On modern large and medium-sized passenger aircraft, the APU is the main equipment to ensure that the engine can be restarted after being stopped in the air, which directly affects flight safety. Its core part is a small turbine engine, which is generally installed in the tail cone at the last section of the fuselage. There is an air intake near the vertical tail above the fuselage, and the exhaust is directly discharged from the exhaust port at the rear end of the tail cone. Therefore, there are strict requirements on the size of the engine. The annular vortex combustion chamber has a more compact structure, which can shorten the engine shaft by nearly 40%. The use of annular vortex combustion chamber as the core burner has almost universally become a development trend in the field of small engines.

[0004] The dual-fuel annular vortex combustion chamber in the prior art has the following shortcomings: hydrogen has a higher flame propagation speed and smaller ignition energy, which makes it impossible for it to work normally in the traditional combustion chamber to meet the requirements, and it is easy to cause problems such as flashback and high pollutant emissions. The atomization performance of aviation kerosene itself is poor, and the mixing performance of kerosene, hydrogen and air in the combustion chamber needs to be improved. Summary of the invention

[0005] The invention provides a dual-fuel annular vortex combustion chamber, which is used to solve the defects of the annular vortex combustion chamber in the prior art, such as uneven mixing of hydrogen, kerosene and air, easy flashback and high pollutant emission.

[0006] The present invention provides a dual-fuel annular vortex combustion chamber, comprising an annular structure formed by splicing a plurality of burners, characterized in that the burner comprises: a hydrogen pipeline, an air collecting box and a U-shaped flame tube, the U-shaped flame tube is provided with at least one hydrogen hole, at least one kerosene nozzle and at least one air hole, the air collecting box cover is arranged on the hydrogen hole, and the hydrogen pipeline is connected with the hydrogen hole through the air collecting box.

[0007] According to a dual-fuel annular vortex combustion chamber of the present invention, the U-shaped flame tube includes an arcuate wall, an outer wall and an inner wall, the outer wall and the inner wall are respectively connected to the two ends of the arcuate wall, and the hydrogen hole and the kerosene nozzle are arranged on the arcuate wall.

[0008] According to a dual-fuel annular vortex combustion chamber of the present invention, the air holes are one or more of impact holes, tangential holes and radial holes, wherein at least one of the impact holes is arranged on the outer wall, and at least one of the tangential holes and / or at least one of the radial holes is arranged on the arc wall.

[0009] According to a dual-fuel annular vortex combustion chamber of the present invention, a first guide plate and / or a second guide plate are arranged on the arc-shaped wall, the first guide plate is arranged on the air flow path entering the U-shaped flame tube through the tangential hole, and the second guide plate is arranged on the air flow path entering the U-shaped flame tube through the radial hole.

[0010] According to a dual-fuel annular vortex combustion chamber of the present invention, the hydrogen holes are divided into at least two groups, and the hydrogen holes in each group are arranged on the arc-shaped wall in at least one row or at least one column.

[0011] According to a dual-fuel annular vortex combustion chamber of the present invention, the hydrogen holes are divided into a first group of hydrogen holes, a second group of hydrogen holes and a third group of hydrogen holes, the first group of hydrogen holes are arranged horizontally on the arc wall, and the second group of hydrogen holes and the third group of hydrogen holes are arranged vertically on both sides of the first group of hydrogen holes.

[0012] According to a dual-fuel annular vortex combustion chamber of the present invention, a third guide plate, a fourth guide plate and a fifth guide plate are provided on the arc-shaped wall, the third guide plate is arranged on the hydrogen flow path entering the U-shaped flame tube through the first group of hydrogen holes, the fourth guide plate cover is arranged on the hydrogen flow path entering the U-shaped flame tube through the second group of hydrogen holes, and the fifth guide plate cover is arranged on the hydrogen flow path entering the U-shaped flame tube through the third group of hydrogen holes.

[0013] According to a dual-fuel annular vortex combustion chamber of the present invention, the third guide plate includes a first guide plate and a first connecting plate, the first connecting plate is connected to the arcuate wall, and the first guide plate is connected to the first connecting plate and is approximately parallel to the arcuate wall; the fourth guide plate includes a second guide plate, a second connecting plate, a third connecting plate and a first sealing plate, the second connecting plate, the third connecting plate and the first sealing plate are connected to the arcuate wall, the second guide plate, the second connecting plate and the third connecting plate are combined into a first U-shaped channel, and the first sealing plate is sealed at the right end of the first U-shaped channel; the fifth guide plate includes a third guide plate, a fourth connecting plate, a fifth connecting plate and a second sealing plate, the fourth connecting plate, the fifth connecting plate and the second sealing plate are connected to the arcuate wall, the third guide plate, the fourth connecting plate and the fifth connecting plate are combined into a second U-shaped channel, and the second sealing plate is sealed at the left end of the second U-shaped channel.

[0014] According to a dual-fuel annular vortex combustion chamber of the present invention, the arc-shaped wall is provided with air holes, and the air holes are arranged downstream of the hydrogen flow path of the hydrogen hole.

[0015] According to a dual-fuel annular vortex combustion chamber of the present invention, the air holes are divided into a first group of air holes, a second group of air holes and a third group of air holes. The first group of air holes is arranged downstream of the hydrogen flow path of the first group of hydrogen holes, the second group of air holes is arranged downstream of the hydrogen flow path of the second group of hydrogen holes, and the third group of air holes is arranged downstream of the hydrogen flow path of the third group of hydrogen holes.

[0016] The dual-fuel annular vortex combustion chamber provided by the present invention can improve the ignition performance, strengthen the combustion at the ignition nozzle, further promote the atomization of kerosene, and is beneficial to improving the combustion efficiency and stable flame flow; the kerosene can fully contact the hydrogen gas to achieve a more uniform mixing of the dual fuels; it can also prevent the flame from returning to cause flashback, cool the guide plate, and improve the ablation resistance and service life of the guide plate high-temperature alloy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a front view and a side view of the dual-fuel annular vortex combustion chamber of the present invention.

[0019] Figure 2It is a side view of a single burner of the dual-fuel annular vortex combustion chamber of the present invention.

[0020] Figure 3 It is a top view of a single burner of the dual-fuel annular vortex combustion chamber of the present invention.

[0021] Figure 4 It is a rear view of a single burner of the dual-fuel annular vortex combustion chamber of the present invention.

[0022] Figure 5 It is a front view of a single burner of the dual-fuel annular vortex combustion chamber of the present invention.

[0023] Figure 6 for Figure 5 A cross-sectional stereogram along the AA direction.

[0024] Figure 7 for Figure 5 A cross-sectional stereogram along the BB direction.

[0025] Figure 8 It is a three-dimensional diagram of a single burner of the dual-fuel annular vortex combustion chamber of the present invention.

[0026] Fig. 9 for Figure 8 A partial enlarged view of part C.

[0027] Fig.10 It is a front view of the U-shaped flame tube of the dual-fuel annular vortex combustion chamber of the present invention.

[0028] Fig.11 It is a schematic diagram of the flow direction and mixing mode of hydrogen, kerosene and air in the U-shaped flame tube of the dual-fuel annular vortex combustion chamber of the present invention.

[0029] Reference numerals: Dual-fuel annular vortex combustion chamber 1, hydrogen pipeline 2, gas collecting box 3, kerosene nozzle 4, tangential hole 5, radial hole 6, air hole 7, impact hole 8, first guide plate 9, second guide plate 10, third guide plate 11, fourth guide plate 12, fifth guide plate 13, hydrogen hole 14, arc wall 15, outer wall 16, inner wall 17, first guide plate 111, second guide plate 122, third guide plate 132, first connecting plate 112, second connecting plate 121, third connecting plate 123, fourth connecting plate 131, fifth connecting plate 133, first blocking plate 124, second blocking plate 134, first group of hydrogen holes 141, second group of hydrogen holes 142, third group of hydrogen holes 143, first group of air holes 71, second group of air holes 72, third group of air holes 73. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Combine the following Figure 1-Figure 10 A dual fuel annular vortex combustor of the present invention is described.

[0032] The dual-fuel annular vortex combustion chamber 1 of the present invention is composed of a plurality of burners spliced ​​into an annular structure, wherein a single burner comprises a hydrogen pipeline 2, an air collecting box 3, an arcuate wall 15, an outer wall 16 and an inner wall 17, wherein the arcuate wall 15, the outer wall 16 and the inner wall 17 together form a U-shaped flame tube, wherein the outer wall 16 and the inner wall 17 are respectively connected to the two ends of the arcuate wall 15, wherein the interior of the U-shaped flame tube is a combustion chamber, wherein an ignition nozzle (not shown in the figure) of an igniter is arranged in the combustion chamber, and a mixture of hydrogen, kerosene and air is ignited when passing through the ignition nozzle. The air collecting box 3 is arranged on a side of the middle part of the arcuate wall 15 away from the combustion chamber, and a plurality of hydrogen holes 14 are provided on the part of the arcuate wall 15 wrapped by the air collecting box 3, wherein the hydrogen pipeline 2 is arranged on a side of the air collecting box 3 away from the arcuate wall 15, and the hydrogen pipeline 2 is connected to the air collecting box 3, and the hydrogen is transported to the air collecting box 3 through the hydrogen pipeline 2 and enters the combustion chamber through the hydrogen holes 14. A plurality of kerosene nozzles 4 are provided on the arc-shaped wall 15, and kerosene is atomized and sprayed into the combustion chamber through the kerosene nozzles 4. Air holes are provided on the U-shaped flame tube for conveying air into the combustion chamber.

[0033] In one embodiment, the dual-fuel annular vortex combustion chamber 1 is composed of 18 burners spliced ​​into an annular structure.

[0034] Reference Figures 2 to 5 In one embodiment, the air hole is one or more of the impact hole 8 on the outer wall 16, the tangential hole 5 and the radial hole 6 on the arc wall 15. The impact hole 8 is opened near the center of the outer wall 16, the tangential hole 5 is opened in the middle and upper part of the arc wall 15 (in the front view direction), and the radial hole 6 is opened in the middle and lower part of the arc wall 15. The number of the impact hole 8, the tangential hole 5 and the radial hole 6 on the flame tube of a single burner can be set to one or more to meet the air supply required for combustion. Opening holes at multiple different positions of the flame tube can increase the air delivery amount and air mixing uniformity, thereby improving the combustion effect.

[0035] In one embodiment, a first guide plate 9 and / or a second guide plate 10 are provided on the side of the arc-shaped wall 15 close to the combustion chamber. The first guide plate 9 is provided on the air flow path entering the combustion chamber through the tangential hole 5. The first guide plate 9 is a long strip plate with an "L"-shaped cross section. After the air enters the combustion chamber through the tangential hole 5, it touches the first guide plate 9 during the flow process to change the flow direction. The flow direction changes from being perpendicular to the arc-shaped wall 15 to being upward along the tangent of the arc-shaped wall 15, that is, flowing to the vicinity of the impact hole 8. The second guide plate 10 is provided on the air flow path entering the combustion chamber through the radial hole 6. The second guide plate 10 is a long strip plate with an "L"-shaped cross section. After the air enters the combustion chamber through the radial hole 6, it touches the second guide plate 10 during the flow process to change the flow direction. The flow direction changes from being perpendicular to the arc-shaped wall 15 to being upward along the tangent of the arc-shaped wall 15, that is, flowing to the vicinity of the hydrogen hole 14. The air entering the combustion chamber through the tangential holes 5 and / or the radial holes 6 changes its flow direction after passing through the first guide plate 9 and / or the second guide plate 10, automatically forming a central reflow zone upstream of the flame tube combustion chamber, and then flows out through the flame tube outlet, realizing the swirler function, thereby saving the weight of the swirler, and having a small pressure loss and a compact structure.

[0036] In one embodiment, the hydrogen holes 14 are divided into multiple groups, and each group of hydrogen holes 14 is arranged in multiple rows and columns horizontally or vertically on the arc wall 15. This design can make the hydrogen more evenly distributed in the combustion chamber and more fully mixed with kerosene and air.

[0037] Reference Figures 6 to 10In one embodiment, the hydrogen holes 14 are divided into three groups, the first group of hydrogen holes 141 is arranged horizontally, and the second group of hydrogen holes 142 and the third group of hydrogen holes 143 are arranged vertically. A third guide plate 11, a fourth guide plate 12 and a fifth guide plate 13 are also arranged on the side of the arc-shaped wall 15 close to the combustion chamber. The third guide plate 11 includes a first guide plate 111 and a first connecting plate 112, the first connecting plate 112 is connected to the arc-shaped wall 15, the first guide plate 111 is connected to the first connecting plate 112 at a certain angle, the first guide plate 111 is approximately parallel to the arc-shaped wall 15, and the third guide plate 11 is arranged near the first group of hydrogen holes 141, and is used to change the flow direction of the hydrogen delivered into the combustion chamber through the first group of hydrogen holes 141 to flow upward (direction in the attached figure). The fourth guide plate 12 includes a second guide plate 122, a second connecting plate 121, a third connecting plate 123 and a first sealing plate 124. The fourth guide plate 12 is covered at the outlet of the second group of hydrogen holes 142. The second connecting plate 121, the third connecting plate 123 and the first sealing plate 124 are connected to the arc wall 15. The second guide plate 122, the second connecting plate 121 and the third connecting plate 123 are combined into a first U-shaped channel. The first sealing plate 124 is sealed at the right end of the first U-shaped channel (the direction in the figure), so that the flow direction of the hydrogen delivered into the combustion chamber through the second group of hydrogen holes 142 is changed to flow to the left (the direction in the figure). The fifth guide plate 13 includes a third guide plate 132, a fourth connecting plate 131, a fifth connecting plate 133 and a second blocking plate 134. The fifth guide plate 13 is disposed at the outlet of the third group of hydrogen holes 143. The fourth connecting plate 131, the fifth connecting plate 133 and the second blocking plate 134 are connected to the arc wall 15. The third guide plate 132, the fourth connecting plate 131 and the fifth connecting plate 133 are combined into a second U-shaped channel. The second blocking plate 134 is sealed at the left end of the second U-shaped channel (the middle direction in the figure), so that the flow direction of the hydrogen delivered into the combustion chamber through the third group of hydrogen holes 143 is changed to flow to the right (the direction in the figure). Through this design, the hydrogen delivered into the combustion chamber is divided into three groups and flows in three directions, so that the kerosene sprayed from any kerosene nozzle can fully contact the hydrogen gas, and the hydrogen, kerosene and air are evenly mixed.

[0038] Furthermore, the arc-shaped wall 15 is provided with air holes 7, which are arranged downstream of the hydrogen flow path of the hydrogen hole 14 to achieve premixing of hydrogen and air, and to prevent backfire and cool the guide plate.

[0039] Further, the air holes 7 are divided into three groups, and each group of air holes can be arranged in multiple rows and columns. The first group of air holes 71 is arranged downstream of the hydrogen flow path of the first group of hydrogen holes 141, and the air transported by the first group of air holes 71 is used to pre-mix with the hydrogen transported by the first group of hydrogen holes 141, and flush the third guide plate 11 to cool it. The second group of air holes 72 is arranged downstream of the hydrogen flow path of the second group of hydrogen holes 142, and the air transported by the second group of air holes 72 is used to pre-mix with the hydrogen transported by the second group of hydrogen holes 142, and flush the fourth guide plate 12 to cool it. The third group of air holes 73 is arranged downstream of the hydrogen flow path of the third group of hydrogen holes 143, and the air transported by the third group of air holes 73 is used to pre-mix with the hydrogen transported by the third group of hydrogen holes 143, and flush the fifth guide plate 13 to cool it.

[0040] In one embodiment, the dual-fuel annular vortex combustion chamber 1 is an annular structure composed of 18 burners, the outer diameter D1 of the dual-fuel annular vortex combustion chamber 1 is 611.8714 mm, the inner diameter D2 of the entire ring is 520 mm, the diameter of the impact hole 8 is 9 mm, the diameter of the radial hole 6 is 6 mm, the diameter of the tangential hole 5 is 6 mm, the radius of the hydrogen hole 14 is 0.48 mm, the spacing between the hydrogen holes 14 is 3 mm, the radius of the air holes 7 is 0.7 mm, the spacing between the air holes 7 is 2 mm, the spacing between the hydrogen holes 14 and the air holes 7 is 4 mm, the spacing between the outer surfaces of the outer wall 16 and the inner wall 17 is 44.9630 mm, the wall thickness of the outer wall 16, the inner wall 17 and the arc wall 15 is 2 mm, and the axial length of the U-shaped flame tube is 83.9033 mm.

[0041] In summary, the technical solution of the present invention is a dual-fuel annular vortex combustion chamber. Through the above embodiments, at least the following technical effects can be achieved: (1) A portion of hydrogen is mixed with kerosene, and the other portion flows through the guide plate, the radial holes in the same direction of the incoming flow, and the air entering through the tangential holes, and flows along the recirculation zone to the igniter position, and ignites at the igniter position. Under normal temperature and pressure, the ignition environment does not need to be atomized and has flammable characteristics. At the same time, the hydrogen outflow airflow flows directly to the ignition nozzle, directly acting on the initial ignition source, improving the ignition performance, and making the ignition curve range wider; on the other hand, the addition of hydrogen strengthens the combustion at the ignition nozzle, further promotes the atomization of kerosene, and is beneficial to improving the combustion efficiency and flame stabilization flow. (2) Kerosene adopts a pressure atomization nozzle, and hydrogen is evenly released from the hydrogen hole. Kerosene and hydrogen are evenly distributed along the annular vortex at alternating intervals, and the hydrogen supply flows in through the small holes and flows out on both sides under the influence of the guide plate, so that any kerosene nozzle can spray kerosene and fully contact the hydrogen gas on both sides. Specifically, hydrogen flows into the flame tube through the gas collecting box and pipelines, and is blocked by the guide plate, changing its flow direction from parallel to the horizontal direction of the kerosene nozzle to vertical; at the same time, air enters through the impact hole above the flame tube, the radial hole in the incoming flow direction, and the tangential hole to form a reflux, and mixes with the dual fuel in the vertical direction. (3) Along the flow direction of hydrogen, two rows of air holes are evenly drilled at the adjacent positions downstream of the hydrogen holes. The two rows of air holes continuously release air, which prevents the flame from being transferred back to the hydrogen holes and causing flashback. While the air is continuously released, it also flushes the guide plate, which plays a cooling role to a certain extent, and indirectly improves the ablation resistance and service life of the guide plate high-temperature alloy.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-fuel annular vortex combustion chamber, comprising a plurality of burners spliced ​​into an annular structure, characterized in that: The burner includes: a hydrogen pipeline, a gas collecting box and a U-shaped flame tube. The U-shaped flame tube is provided with at least one hydrogen hole, at least one kerosene nozzle and at least one air hole. The gas collecting box cover is arranged on the hydrogen hole. The hydrogen pipeline is connected with the hydrogen hole through the gas collecting box.

2. The dual-fuel annular vortex combustion chamber according to claim 1, characterized in that: The U-shaped flame tube includes an arc-shaped wall, an outer wall and an inner wall, wherein the outer wall and the inner wall are respectively connected to two ends of the arc-shaped wall, and the hydrogen hole and the kerosene nozzle are arranged on the arc-shaped wall.

3. The dual-fuel annular vortex combustion chamber according to claim 2, characterized in that: The air holes are one or more of impact holes, tangential holes and radial holes, wherein at least one of the impact holes is arranged on the outer wall, and at least one of the tangential holes and / or at least one of the radial holes is arranged on the arc wall.

4. The dual-fuel annular vortex combustion chamber according to claim 3, characterized in that: The arc-shaped wall is provided with a first guide plate and / or a second guide plate. The first guide plate is arranged on the air flow path entering the U-shaped flame tube through the tangential hole, and the second guide plate is arranged on the air flow path entering the U-shaped flame tube through the radial hole.

5. The dual-fuel annular vortex combustion chamber according to claim 3 or 4, characterized in that: The hydrogen holes are divided into at least two groups, and the hydrogen holes in each group are arranged on the arc-shaped wall in at least one row or at least one column.

6. The dual-fuel annular vortex combustion chamber according to claim 5, characterized in that: The hydrogen holes are divided into a first group of hydrogen holes, a second group of hydrogen holes and a third group of hydrogen holes. The first group of hydrogen holes is arranged horizontally on the arc wall, and the second group of hydrogen holes and the third group of hydrogen holes are arranged vertically on both sides of the first group of hydrogen holes.

7. The dual-fuel annular vortex combustion chamber according to claim 6, characterized in that: A third guide plate, a fourth guide plate and a fifth guide plate are provided on the arc-shaped wall. The third guide plate is provided on the hydrogen flow path entering the U-shaped flame tube through the first group of hydrogen holes. The fourth guide plate cover is provided on the hydrogen flow path entering the U-shaped flame tube through the second group of hydrogen holes. The fifth guide plate cover is provided on the hydrogen flow path entering the U-shaped flame tube through the third group of hydrogen holes.

8. The dual-fuel annular vortex combustor according to claim 7, characterized in that: The third guide plate includes a first guide plate and a first connecting plate, the first connecting plate is connected to the arc-shaped wall, and the first guide plate is connected to the first connecting plate and is approximately parallel to the arc-shaped wall; the fourth guide plate includes a second guide plate, a second connecting plate, a third connecting plate and a first blocking plate, the second connecting plate, the third connecting plate and the first blocking plate are connected to the arc-shaped wall, the second guide plate, the second connecting plate and the third connecting plate are combined into a first U-shaped channel, and the first blocking plate is sealed at the right end of the first U-shaped channel; the fifth guide plate includes a third guide plate, a fourth connecting plate, a fifth connecting plate and a second blocking plate, the fourth connecting plate, the fifth connecting plate and the second blocking plate are connected to the arc-shaped wall, the third guide plate, the fourth connecting plate and the fifth connecting plate are combined into a second U-shaped channel, and the second blocking plate is sealed at the left end of the second U-shaped channel.

9. The dual-fuel annular vortex combustor according to claim 8, characterized in that: The arc-shaped wall is provided with an air hole, and the air hole is arranged downstream of the hydrogen flow path of the hydrogen hole.

10. The dual-fuel annular vortex combustor according to claim 9, characterized in that: The air holes are divided into a first group of air holes, a second group of air holes and a third group of air holes. The first group of air holes is arranged downstream of the hydrogen flow path of the first group of hydrogen holes, the second group of air holes is arranged downstream of the hydrogen flow path of the second group of hydrogen holes, and the third group of air holes is arranged downstream of the hydrogen flow path of the third group of hydrogen holes.

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