Hydrogen micro-combustion chamber with built-in vortex generator

Abstract

The application provides a hydrogen micro-mixed combustion chamber with built-in vortex generators, and relates to the field of aeroengines.The hydrogen micro-mixed combustion chamber with built-in vortex generators comprises a combustion device main body and a gas supply pipeline.The combustion device main body is provided with a plurality of combustion holes.The combustion holes form a first opening on one side of the combustion device main body.The inner wall of the combustion holes is provided with a vortex generator on the side close to the first opening.The vortex generator is used for uniformly mixing combustion gas and air.The combustion device main body is internally provided with an air inlet channel.The hydrogen micro-mixed combustion chamber with built-in vortex generators provided by the application can effectively mix hydrogen and air through the vortex generator arranged on the inner wall of the combustion hole, can realize hydrogen diffusion combustion, and can enhance the mixing of air and hydrogen.The backfire problem can be effectively prevented by arranging the injection hole on one side of the combustion device main body.

Description

Technical Field

[0001] This invention relates to the field of aero-engines, and more particularly to a hydrogen micro-mixing combustion chamber with a built-in vortex generator. Background Technology

[0002] To achieve the long-term goal of carbon neutrality, traditional energy sources can no longer meet strategic needs, necessitating the exploration of breakthroughs in new energy sources and configurations. Hydrogen fuel holds immense decarbonization potential for the aviation and ground-based gas turbine sectors. The reaction between hydrogen fuel and oxygen produces water or water vapor as a byproduct, generating no carbon emissions. Furthermore, hydrogen fuel has a calorific value approximately three times that of aviation kerosene, making it highly economical and practical. Currently, most hydrogen combustors commonly used in international engineering projects are employed in ground-based gas turbines, with fewer options suitable for aero-engine operating environments. These solutions typically utilize premixed combustion to achieve thorough mixing of hydrogen and air, reducing NOx emissions. However, this combustion method introduces two problems: backfire and thermoacoustic vibration, posing significant safety risks to hydrogen applications. Summary of the Invention

[0003] This invention provides a hydrogen micro-mixing combustion chamber with a built-in vortex generator to solve the problem of backfire that occurs in existing hydrogen fuel combustion methods.

[0004] This invention provides a hydrogen micro-mixing combustion chamber with a built-in eddy current generator, comprising:

[0005] The combustion device body has multiple combustion holes, each combustion hole forming a first opening on one side of the combustion device body. A vortex generator is disposed on the inner wall of the combustion hole near the first opening, and the vortex generator is used to mix the combustion gas and air evenly. An air intake channel is disposed inside the combustion device body. A spray hole is disposed on the inner wall of the combustion hole near the first opening, or on one side of the combustion device body, and the spray hole is connected to the air intake channel.

[0006] An air supply pipeline, wherein the outlet port of the air supply pipeline is connected to the air inlet channel.

[0007] According to an embodiment of the present invention, a hydrogen micro-mixing combustion chamber with a built-in vortex generator is provided, wherein a plurality of combustion holes are arranged in an array, and the cross-sectional shape of the plurality of combustion holes is the same.

[0008] According to an embodiment of the present invention, a hydrogen micro-mixing combustion chamber with a built-in vortex generator is provided, wherein the cross-section of the plurality of combustion holes is a regular polygon, and the central axis of the nozzle is perpendicular to one side of the regular polygon.

[0009] According to an embodiment of the present invention, a hydrogen micro-mixing combustion chamber with a built-in vortex generator is provided, wherein the inner wall of the combustion hole is provided with two nozzles, the two nozzles are symmetrical about one diameter of the regular polygon, and the two nozzles are located on two different sides of the regular polygon.

[0010] According to an embodiment of the present invention, a hydrogen micro-mixing combustion chamber with a built-in vortex generator is provided, wherein the diameter of the nozzle is 0.2mm-1.5mm, and when the nozzle is located on the inner wall of the combustion hole near the first opening, the distance between the nozzle and the end face of the first opening is less than 2mm; when the nozzle is located on one side of the combustion device body, the distance between the nozzle and the end face of the first opening is less than 5mm.

[0011] According to an embodiment of the present invention, a hydrogen micro-mixing combustion chamber with a built-in vortex generator is provided. The vortex generator is triangular, figure-eight shaped, wedge-shaped, V-shaped, or arrow-shaped, and the height of the vortex generator is 1mm-8mm.

[0012] According to an embodiment of the present invention, a hydrogen micro-mixing combustion chamber with a built-in vortex generator is provided, wherein the air intake channel includes:

[0013] Multiple connecting air passages, wherein the connecting air passages are connected to the corresponding nozzles;

[0014] The main air duct is connected to the outlet ports of the multiple connecting air ducts and the air supply pipeline.

[0015] According to an embodiment of the present invention, a hydrogen micro-mixing combustion chamber with a built-in vortex generator is provided, wherein the main gas duct includes:

[0016] The main air duct unit is connected to the air outlet port of the air supply pipeline;

[0017] Multiple branch airway units are provided, and the multiple branch airway units are arranged at intervals. The branch airway units are connected to the main airway unit and the corresponding connecting airway.

[0018] According to an embodiment of the present invention, a hydrogen micro-mixing combustion chamber with a built-in vortex generator is provided, wherein the cross-section of the gas supply pipeline gradually changes from a circle to a rectangle in the direction from the gas inlet port to the gas outlet port of the gas supply pipeline.

[0019] According to an embodiment of the present invention, a hydrogen micro-mixing combustion chamber with a built-in vortex generator is provided, wherein a flange is provided on the outer periphery of the combustion device body, and the flange is provided with through holes for mounting bolts.

[0020] The hydrogen micro-mixing combustion chamber with a built-in vortex generator provided in this embodiment of the invention enables effective mixing of hydrogen and air by setting the vortex generator on the inner wall of the combustion hole, thereby achieving hydrogen diffusion combustion and enhancing the mixing of air and hydrogen; by setting the nozzle on one side of the main body of the combustion device, backfire problem can be effectively prevented. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is one of the three-dimensional structural schematic diagrams of the hydrogen micro-mixing combustion chamber with built-in vortex generator provided in the embodiments of the present invention;

[0023] Figure 2 This is the second three-dimensional structural schematic diagram of the hydrogen micro-mixing combustion chamber with built-in vortex generator provided in the embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the main structure of the hydrogen micro-mixing combustion chamber with a built-in vortex generator provided in an embodiment of the present invention;

[0025] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure along section line AA;

[0026] Figure 5 yes Figure 3 A schematic diagram of the cross-sectional structure along section line BB;

[0027] Figure 6 This is a side view of the hydrogen micro-mixing combustion chamber with a built-in vortex generator provided in an embodiment of the present invention.

[0028] Figure 7 yes Figure 6 A schematic diagram of the cross-sectional structure along section line CC;

[0029] Figure 8 This is a schematic diagram of the connection relationship between the connecting air passage and the nozzle provided in an embodiment of the present invention;

[0030] Figure 9 This is one of the schematic diagrams showing the positional relationship between the combustion hole and the eddy current generator provided in the embodiments of the present invention;

[0031] Figure 10 This is the second schematic diagram showing the positional relationship between the combustion hole and the eddy current generator provided in this embodiment of the invention;

[0032] Figure 11 yes Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0033] Figure label:

[0034] 100. Combustion device body; 110. Combustion hole; 111. First combustion hole; 112. Second combustion hole; 113. Third combustion hole; 120. Swirl generator; 130. Nozzle; 140. Connecting air passage; 141. First air intake passage; 142. Second air intake passage; 150. Main air passage unit; 160. Branch air passage unit; 170. Flange; 200. Air supply pipeline. Detailed Implementation

[0035] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0036] 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.

[0037] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0038] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Figure 1 One of the three-dimensional structural schematic diagrams of the hydrogen micro-mixing combustion chamber with built-in vortex generator provided in the embodiments of the present invention is illustrated. Figure 2 This is a second example of a three-dimensional structural schematic diagram of a hydrogen micro-mixing combustion chamber with a built-in vortex generator provided in an embodiment of the present invention. Figure 11 yes Figure 1 A magnified view of the local structure at point A, as shown below. Figure 1 , Figure 2 and Figure 11 As shown, the hydrogen micro-mixing combustion chamber with built-in vortex generator includes a combustion device body 100 and a gas supply pipeline 200. The combustion device body 100 is provided with a plurality of combustion holes 110. The combustion holes 110 form a first opening on one side of the combustion device body 100. A vortex generator 120 is provided on the inner wall of the combustion holes 110 near the first opening. The vortex generator 120 is used to mix the combustion gas with air evenly. An air intake channel is provided inside the combustion device body 100. A nozzle 130 is provided on the inner wall of the combustion holes 110 near the first opening or on one side of the combustion device body 100. The nozzle 130 is connected to the air intake channel. The gas outlet of the gas supply pipeline 200 is connected to the air intake channel.

[0041] The hydrogen micro-mixing combustion chamber with built-in vortex generator provided in this embodiment of the invention enables hydrogen and air to be effectively mixed by setting the vortex generator 120 on the inner wall of the combustion hole 110, thereby achieving hydrogen diffusion combustion and enhancing the mixing of air and hydrogen; by setting the nozzle 130 on one side of the combustion device body 100, backfire problem can be effectively prevented.

[0042] In one embodiment of the present invention, Figure 3 A schematic diagram of the main structure of the hydrogen micro-mixing combustion chamber with a built-in vortex generator provided in an embodiment of the present invention is shown, as follows: Figure 3 As shown, the combustion holes 110 are through holes, and multiple combustion holes 110 are arranged in an array to ensure that the formed flame clusters are evenly distributed. The cross-sectional shapes of the multiple combustion holes 110 are all the same, so that the conditions for the formation of each flame are the same, ensuring that the formed flame clusters are of the same size.

[0043] In one embodiment of the present invention, the cross-sections of the plurality of combustion holes 110 are all regular polygons, and the cross-sections of the plurality of combustion holes 110 are all identical, so as to facilitate the processing of the combustion holes 110 and shorten the processing cycle. Of course, the cross-sectional shape of the combustion holes 110 is not limited to a regular polygon, and can also be circular, square, rectangular, triangular, arched, or elliptical. Regardless of the shape of the combustion holes 110, the outer expansion dimension of the combustion holes 110 is less than 10mm. The central axis of the nozzle 130 is perpendicular to one side of the regular polygon, that is, the central axis of the nozzle 130 is perpendicular to one of the plurality of inner walls of the regular polygonal combustion hole.

[0044] In one specific embodiment of the present invention, such as Figure 3 As shown, the main body 100 of the combustion device has nine combustion holes 110 arranged in a 3×3 array, i.e., three rows of combustion holes 110, with three combustion holes 110 in each row, and the distance between any two adjacent combustion holes 110 is equal. Each combustion hole 110 has a regular hexagonal cross-section, and all combustion holes 110 have the same cross-sectional area. Since the combustion holes 110 are regular hexagonal through holes, each combustion hole 110 has six sequentially connected inner walls, with the nozzle 130 located on one of these inner walls. The central axis of the nozzle 130 is perpendicular to the inner wall on which the nozzle 130 is located.

[0045] In one specific embodiment of the present invention, the inner wall of the combustion hole 110 is provided with two spray holes 130. The two spray holes 130 are symmetrically arranged about one of the diameters of a regular polygon, and the two spray holes 130 are located on two different sides of the regular polygon. Figure 8 As shown, the two nozzles 130 are located on two different inner walls of the hexagonal combustion hole 110, with one inner wall separating the two inner walls. Figure 8As shown, the two nozzles 130 can be located on the two inner walls above the vortex generator 120, or on the two inner walls on the left and right sides of the vortex generator 120. By symmetrically arranging the two nozzles 130, the ejected hydrogen can interact, resulting in a more uniform mixture of hydrogen and air. By arranging the two nozzles 130 on both sides of the vortex generator 120, the mixing of air and hydrogen can be further enhanced.

[0046] It should be noted that each combustion hole 110 is provided with at least two nozzles 130, and the number of nozzles 130 is 2-12, depending on the size of the flame and the shape of the combustion hole 110.

[0047] Because the combustion orifice 110 adopts a regular hexagonal structure, multiple combustion orifices 110 form a honeycomb-like structure. This honeycomb structure is both robust and material-saving, reducing material costs, improving space utilization, making the combustion chamber safer and more reliable, and also lightweight, effectively reducing engine weight. In this embodiment, the cross-section of the combustion orifice 110 is regular hexagonal. However, the shape of the cross-section of the combustion orifice 110 is not limited to regular hexagon; it can also be circular, square, rectangular, triangular, arched, or elliptical. The maximum inner diameter of the combustion orifice 110 is 3mm-10mm, and the cross-sectional area of ​​the combustion orifice 110 is 5mm². 2 -50mm 2 .

[0048] In one specific embodiment of the present invention, the nozzle 130 is a circular orifice with a diameter of 0.2mm-1.5mm. The diameter of the nozzle 130 determines the shape of the ejected hydrogen gas, and thus the shape of the flame. The diameter of the nozzle 130 is specifically determined based on the hydrogen flow rate, the distance between the nozzle 130 and the vortex generator 120, and the shape and size of the combustion hole 110. When the nozzle 130 is located on the inner wall of the combustion hole 110 near the first opening, the distance between the nozzle 130 and the end face of the first opening is less than 2mm, i.e. Figure 9 The distance L in the middle is less than 2mm. When the nozzle 130 is located on one side of the combustion device body 100, the distance between the nozzle 130 and the end face of the first opening is less than 5mm.

[0049] It should be noted that the cross-sectional shape of the nozzle 130 is not limited to this; it can also be square, rectangular, triangular, arched, or elliptical.

[0050] In one specific embodiment of the present invention, Figure 9 One of the schematic diagrams illustrating the positional relationship between the combustion hole and the vortex generator provided in this embodiment of the invention is illustrated. Figure 10 This is an example of a second schematic diagram illustrating the positional relationship between the combustion hole and the eddy current generator provided in an embodiment of the present invention, such as... Figure 9 and Figure 10 As shown, the vortex generator 120 is triangular in shape, with one face of the triangular prism connected to one inner wall of the combustion hole 110. Specifically, the vortex generator 120 and the inner wall of the combustion hole 110 are integrally formed. The height of the vortex generator 120 (i.e., Figure 9 The height of H in the figure is 1mm-8mm, and the height of the vortex generator 120 is determined according to the size of the combustion hole 110 and the size of the nozzle 130.

[0051] Here, the inner wall connecting the combustion hole 110 and the triangular prism is defined as the first inner wall, and the height of the vortex generator 120 refers to the maximum distance between the vortex generator 120 and the first inner wall. When the vortex generator 120 is triangular, the angle between the edge of the triangular prism furthest from the first inner wall and the first inner wall (i.e., Figure 9 The sweep angle of the triangular prism (i.e., β) is 30°-60°. Figure 10 The γ) is 15°-30°. The number of vortex generators 120 in each combustion hole 110 can be one, two or more. For example, when the combustion hole 110 is a regular hexagon, the vortex generator 120 can be set in only one of the six inner walls, or one vortex generator 120 can be set on each inner wall.

[0052] In one specific embodiment of the present invention, the eddy current generator 120 is in the shape of a figure eight. The eddy current generator 120 includes two guide sections, which are strip-shaped and arranged in a figure eight shape.

[0053] In one specific embodiment of the present invention, the eddy current generator 120 is wedge-shaped, with a smaller thickness on one side and a larger thickness on the other side. Of course, the shape of the eddy current generator 120 is not limited to the above-mentioned types, and can also be V-shaped or arrow-shaped.

[0054] In one embodiment of the present invention, the air intake channel includes a plurality of connecting air passages 140 and a main air passage. The connecting air passages 140 are connected to corresponding nozzles 130 and are used to connect the nozzles 130 and the main air passage. The main air passage is connected to the plurality of connecting air passages 140 and the air outlet of the air supply line 200 and is used to connect the connecting air passages 140 to the air outlet of the air supply line 200.

[0055] In one specific embodiment of the present invention, Figure 8 A schematic diagram illustrating the connection relationship between the connecting air passage and the nozzle provided in an embodiment of the present invention is shown, such as... Figure 3 and Figure 8As shown, the intake channel includes six connecting air passages 140, arranged in a 3×2 array, i.e., three rows of two connecting air passages 140 each. Three combustion holes 110 are provided in the same row, designated as first combustion hole 111, second combustion hole 112, and third combustion hole 113, arranged alternately from left to right. Two intake channels are provided in the same row, designated as first intake channel 141 and second intake channel 142, arranged alternately from left to right. The first intake channel 141 corresponds to the first combustion hole 111, and the second intake channel 142 corresponds to the third combustion hole 113. The first intake passage 141 is connected to the two nozzles 130 of the first combustion hole 111 and the nozzle 130 on the left side of the second combustion hole 112. The second intake passage 142 is connected to the two nozzles 130 of the third combustion hole 113 and the nozzle 130 on the right side of the second combustion hole 112. This connection method can effectively reduce the number of connecting passages 140 and simplify the flow channel structure.

[0056] It should be noted that the connection method between the air intake channel and the nozzle 130 is not limited to this. Three air intake channels can also be set in the same row, with one air intake channel connected to the nozzle 130 of the corresponding combustion hole 110. For example, a first air intake channel, a second air intake channel, and a third air intake channel can be set in the same row, arranged alternately from left to right. The first air intake channel is connected to the two nozzles 130 of the first combustion hole, the second air intake channel is connected to the two nozzles 130 of the second combustion hole, and the third air intake channel is connected to the two nozzles 130 of the third combustion hole. Of course, only one air intake channel can be set in each row, with one air intake channel connected to the nozzle 130 of each combustion hole 110.

[0057] In one embodiment of the present invention, Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure along section line AA. Figure 5 yes Figure 3 A schematic diagram of the cross-sectional structure along section line BB. Figure 6 A side view of the hydrogen micro-mixing combustion chamber with a built-in vortex generator provided in an embodiment of the present invention is illustrated. Figure 7 yes Figure 6 A schematic diagram of the cross-sectional structure along section line CC, as shown below. Figures 4 to 7As shown, the main air duct includes a main air duct unit 150 and multiple branch air duct units 160. The main air duct unit 150 is connected to the outlet port of the gas supply pipeline 200. The main air duct unit 150 extends longitudinally, and the multiple branch air duct units 160 are spaced apart longitudinally and extend laterally. The width of the main air duct unit 150 is greater than the width of the branch air duct units 160. The branch air duct units 160 are connected to the main air duct unit 150 and their corresponding connecting air ducts 140. By connecting the main air duct unit 150 with the multiple branch air duct units 160, the pressure within each branch air duct unit 160 is the same, and the hydrogen pressure ejected from each nozzle 130 is the same, thereby ensuring good flame consistency.

[0058] In one specific embodiment of the present invention, the main airway includes a main airway unit 150 and four branch airway units 160. The main airway unit 150 extends longitudinally, and the four branch airway units 160 are arranged longitudinally at intervals, with equal distances between adjacent branch airway units 160, and each branch airway unit 160 has an equal width. Here, the four branch airway units 160 are defined sequentially from top to bottom as a first branch airway unit 160, a second branch airway unit 160, a third branch airway unit 160, and a fourth branch airway unit 160, wherein the first branch airway unit 160 is connected to two connecting airways 140 in the first row, the second branch airway unit 160 is connected to two connecting airways 140 in the second row, and the third branch airway unit 160 is connected to two connecting airways 140 in the third row.

[0059] The combustion device body 100 can be manufactured using 3D printing. The combustion device body 100 has multiple circular holes, which are connected to the branch gas duct units 160 one by one. The circular holes are used to facilitate the cleaning of metal powder inside the branch gas duct units 160. During use, the circular holes are sealed with plugs to prevent hydrogen leakage.

[0060] In one embodiment of the present invention, the cross-section of the gas supply pipeline 200 gradually changes from a circle to a rectangle in the direction from the inlet port to the outlet port. Since the cross-section of the gas supply pipeline 200 is circular, if the circular gas supply pipeline 200 were directly connected to the main gas duct unit 150, it would cause instability in the airflow within the main gas duct, connecting gas duct 140, and nozzle 130. By gradually changing the cross-section of the gas supply pipeline 200 from a circle to a rectangle, a transition section is formed at the outlet port of the gas supply pipeline 200. This transition section ensures that the hydrogen gas experiences the same pressure at any point in the main gas duct unit 150, avoiding the influence of the circular cross-section of the gas supply pipeline 200 on the airflow field of the honeycomb channel, while simultaneously ensuring the uniformity of the flow rate in each hydrogen nozzle 130.

[0061] In one embodiment of the present invention, a flange 170 is provided on the outer periphery of the combustion device body 100, and the flange 170 is provided with through holes for mounting bolts. The flange 170 can be welded to the combustion device body 100 or integrally formed. The combustion device body 100 is fixed to the test device by the flange 170. Using the flange 170 for fixing has the following two advantages: first, it enhances the sealing of the test device and prevents hydrogen leakage, which could cause safety problems; second, it strengthens the fixing effect of the array unit head, prevents vibration during the test, and ensures the safety of the experiment.

[0062] The following is combined Figures 1 to 11 A specific embodiment of the present invention is described, such as Figures 1 to 11 As shown, the hydrogen micro-mixing combustion chamber with built-in vortex generator includes a combustion device body 100 and a gas supply pipeline 200. The combustion device body 100 is provided with 9 combustion holes 110. The combustion holes 110 are through holes. The combustion holes 110 form a first opening on one side of the combustion device body 100 and a second opening on the other side of the combustion device body 100. The first opening and the second opening have the same shape and the same size.

[0063] The nine combustion holes 110 on the main body 100 of the combustion device are arranged in a 3×3 array, that is, there are three rows of combustion holes 110, with three combustion holes 110 in each row. The distance between any two adjacent combustion holes 110 is equal, and the cross-sectional area of ​​each combustion hole 110 is equal. The cross-section of each combustion hole 110 is a regular polygon, and the cross-section of each combustion hole 110 is a regular hexagon. Each combustion hole 110 has six sequentially connected inner walls.

[0064] Each combustion hole 110 has a vortex generator 120 installed on the inner wall near the first opening. The vortex generator 120 is used to ensure uniform mixing of combustion gas and air. The vortex generator 120 is triangular in shape, and its height is 1mm-8mm. The angle between the edge of the triangular prism furthest from the first inner wall and the first inner wall (i.e., the angle between the edge of the triangular prism furthest from the first inner wall and the first inner wall) is... Figure 9 The sweep angle of the triangular prism (i.e., β) is 30°-60°. Figure 10 The range of γ is 15°-30°.

[0065] A nozzle 130 is provided on one side of the combustion device body 100, that is, the nozzle 130 is located outside the combustion hole 110 to prevent hydrogen combustion backfire. The distance between the nozzle 130 and the end face of the first opening is less than 5mm. The nozzle 130 has a circular cross-section and a diameter of 0.2mm-1.5mm. Two nozzles 130 are provided on the inner wall of the combustion hole 110. The two nozzles 130 are symmetrical about one diameter of a regular hexagon and are located on two different sides of the regular polygon. The two nozzles 130 are located on two different inner walls of the regular hexagonal combustion hole 110, and there is an inner wall between the two inner walls.

[0066] The intake passage includes a main intake passage and six connecting intake passages 140. The six connecting intake passages 140 are arranged in a 3×2 array, that is, in three rows, with two intake passages in each row. Three combustion holes 110 are provided in the same row: a first combustion hole 111, a second combustion hole 112, and a third combustion hole 113, arranged alternately from left to right. Two intake passages are provided in the same row: a first intake passage 141 and a second intake passage 142, arranged alternately from left to right. The first intake passage 141 corresponds to the first combustion hole 111, and the second intake passage 142 corresponds to the third combustion hole 113. The first air intake passage 141 is connected to the two nozzles 130 of the first combustion hole 111 and the nozzle 130 on the left side of the second combustion hole 112. The second air intake passage 142 is connected to the two nozzles 130 of the third combustion hole 113 and the nozzle 130 on the right side of the second combustion hole 112.

[0067] The main airway includes a main airway unit 150 and four branch airway units 160. The main airway unit 150 extends longitudinally, and the four branch airway units 160 are spaced apart longitudinally, with equal distances between adjacent branch airway units 160. Each branch airway unit 160 has an equal width. The main airway unit 150 is connected to the outlet port of the air supply line 200. The width of the main airway unit 150 is greater than the width of the branch airway units 160. The first branch airway unit 160 is connected to two connecting airways 140 in the first row, the second branch airway unit 160 is connected to two connecting airways 140 in the second row, and the third branch airway unit 160 is connected to two connecting airways 140 in the third row. The main airway unit 150 is connected to the outlet port of the air supply line 200. From the inlet port to the outlet port of the air supply line 200, the cross-section of the air supply line 200 gradually changes from circular to rectangular.

[0068] A flange 170 is provided on the outer periphery of the combustion device body 100, and the flange 170 has through holes for mounting bolts. The flange 170 is integrally formed with the combustion device body 100. The combustion device body 100 is fixed to the test device via the flange 170.

[0069] The working principle of the hydrogen micro-mixing combustion chamber with built-in eddy current generator of the present invention:

[0070] Hydrogen first enters the main gas duct unit 150 through the gas supply line 200, then enters each branch gas duct unit 160 through the main gas duct unit 150, and then enters each connecting gas duct 140 through the branch gas duct unit 160. Finally, it is ejected through the nozzle 130 at an angle to the inner wall of the vertical combustion hole 110, and mixes evenly with air under the action of the vortex generator 120, forming tiny flame balls in the combustion hole 110. The entire combustion chamber has nine tiny flame balls, and air and hydrogen in each tiny flame ball can achieve lean non-premixed combustion, resulting in complete combustion, high efficiency, and a significant reduction in local hot spots in the flame, thereby significantly reducing NOx emissions. The non-premixed combustion organization method also solves the problem of rapid hydrogen combustion and easy backfire.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydrogen micro-mixing combustion chamber with a built-in eddy current generator, characterized in that, include: The combustion device body has multiple combustion holes, each combustion hole forming a first opening on one side of the combustion device body. A vortex generator is disposed on the inner wall of the combustion hole near the first opening, and the vortex generator is used to mix the combustion gas and air evenly. An air intake channel is disposed inside the combustion device body. A spray hole is disposed on the inner wall of the combustion hole near the first opening, or on one side of the combustion device body, and the spray hole is connected to the air intake channel. An air supply pipeline, wherein the outlet port of the air supply pipeline is connected to the air inlet channel; The air intake passage includes: Multiple connecting air passages, wherein the connecting air passages are connected to the corresponding nozzles; The main air duct is connected to the outlet ports of the multiple connecting air ducts and the air supply pipeline; The main airway includes: The main air duct unit is connected to the air outlet port of the air supply pipeline; Multiple branch airway units are arranged at intervals, and each branch airway unit is connected to the main airway unit and the corresponding connecting airway. From the air inlet port to the air outlet port of the air supply pipeline, the cross-section of the air supply pipeline gradually changes from a circle to a rectangle. The intake channel includes six connecting air passages arranged in a 3×2 array. Three combustion holes are located in the same row: a first combustion hole, a second combustion hole, and a third combustion hole. These three combustion holes are arranged alternately from left to right. Two connecting air passages are also located in the same row: a first connecting air passage and a second connecting air passage. These two connecting air passages are arranged alternately from left to right. The first connecting air passage corresponds to the first combustion hole, and the second connecting air passage corresponds to the third combustion hole. The first connecting air passage is connected to the two nozzles of the first combustion hole and the nozzle on the left side of the second combustion hole. The second connecting air passage is connected to the two nozzles of the third combustion hole and the nozzle on the right side of the second combustion hole.

2. The hydrogen micro-mixing combustion chamber with a built-in vortex generator according to claim 1, characterized in that, The plurality of combustion holes are arranged in an array, and the cross-sectional shape of the plurality of combustion holes is the same.

3. The hydrogen micro-mixing combustion chamber with a built-in vortex generator according to claim 2, characterized in that, The cross-sections of the multiple combustion holes are all regular polygons, and the central axis of the nozzle is perpendicular to one side of the regular polygon.

4. The hydrogen micro-mixing combustion chamber with a built-in vortex generator according to claim 3, characterized in that, The inner wall of the combustion hole is provided with two spray holes, which are symmetrical about one diameter of the regular polygon and are located on two different sides of the regular polygon.

5. The hydrogen micro-mixing combustion chamber with a built-in vortex generator according to any one of claims 1 to 4, characterized in that, The diameter of the nozzle is 0.2mm-1.5mm. When the nozzle is located on the inner wall of the combustion hole near the first opening, the distance between the nozzle and the end face of the first opening is less than 2mm. When the nozzle is located on one side of the combustion device body, the distance between the nozzle and the end face of the first opening is less than 5mm.

6. The hydrogen micro-mixing combustion chamber with a built-in vortex generator according to any one of claims 1 to 4, characterized in that, The eddy current generator is in the shape of a triangle, figure eight, wedge, V, or arrow, and its height is 1mm-8mm.

7. The hydrogen micro-mixing combustion chamber with a built-in vortex generator according to any one of claims 1 to 4, characterized in that, A flange is provided on the outer periphery of the main body of the combustion device, and the flange is provided with through holes for mounting bolts.

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