Integrated design of hydrogen-rich combustion chamber head

Abstract

The present disclosure provides an integrated design of a hydrogen-rich combustion chamber head, comprising: a nozzle and a plurality of mixers, wherein the first end of the nozzle is connected to the combustion chamber, and the plurality of mixers are respectively embedded in the first end of the nozzle, and the plurality of mixers are evenly distributed; the mixer comprises: a trailing edge, two first side surfaces, a second side surface and a leading edge, and the trailing edge is provided with at least one injection hole; the first ends of the two first side surfaces are respectively connected to the trailing edge to form an airfoil structure; the leading edge is connected to the second end of the side surface; the cavity surrounded by the two first side surfaces and the second side surface can be used as a fuel collecting chamber or to arrange a liquid fuel nozzle pipeline for multi-fuel mixing. The integrated structure composed of the nozzle and the mixer disclosed in the present disclosure can generate an axial vortex in the mixing area for mixing, and compared with a combustion chamber using a swirler, there is no recirculation zone and a low-speed zone, ensuring that no self-ignition and flashback occur before the fuel and air are completely mixed.

Description

Technical Field

[0001] The present disclosure relates to the field of advanced combustion engines, and in particular to an integrated hydrogen-rich combustion chamber head. Background Art

[0002] Hydrogen-rich fuels can be divided into three categories according to their sources: coke oven gas, refinery gas and synthesis gas. Coke oven gas contains hydrogen and nitrogen. The hydrogen volume fraction of refinery gas can be as high as 90%. The hydrogen volume fraction of synthesis gas can be as high as 50%. Since there are many sources of refinery gas and synthesis gas in small factories everywhere, coke oven gas needs to be processed before reuse, so it is of strategic significance to study the combustion chamber of hydrogen-rich gas turbines, which can reuse resources and reduce operating costs.

[0003] However, there are still many problems with the current combustion chambers for hydrogen, such as no radial and / or axial swirlers that can operate stably without natural gas. This basically means that there are a lot of hidden dangers in the transformation of the existing lean premixed combustion chamber, and it may also cause high costs due to the source of the mixed gas. For example, the combustion chamber structure is complex, the design and testing costs are high, and a large number of modifications to the combustion chamber will cause changes in the overall layout, but it is not realistic to redesign the combustion chamber. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The present disclosure provides an integrated hydrogen-rich combustion chamber head, which, starting from the chemical mechanism, modifies the combustion chamber by designing the flame position without modifying the overall layout, and adjusts the pneumatic combustion layout of the hydrogen combustion chamber to at least partially solve the technical problems raised above.

[0006] (II) Technical solution

[0007] According to one aspect of the present disclosure, there is provided an integrated hydrogen-rich combustion chamber head, comprising:

[0008] a nozzle, wherein a first end of the nozzle is connected to the combustion chamber;

[0009] A plurality of mixers are respectively embedded in the first end of the nozzle, and the plurality of mixers are evenly distributed; a mixing area for the incoming air and hydrogen is provided between two adjacent mixers, and the mixers include:

[0010] a trailing edge provided with at least one injection hole;

[0011] At least two first side surfaces, wherein first ends of the two first side surfaces are respectively connected to the trailing edge to form an airfoil-shaped structure;

[0012] A front edge is connected to the second end of the side surface.

[0013] In some embodiments of the present disclosure, the blender further comprises:

[0014] The second side surface is connected to the first side surface, the trailing edge and the leading edge at the same time, and the second side surface is in contact with the outer wall of the nozzle. The cavity surrounded by the two first side surfaces and the second side surface is used as a fuel plenum or a liquid fuel nozzle pipeline is arranged for multi-fuel mixing.

[0015] In some embodiments of the present disclosure, the first side surface is a triangular structure to reduce the resistance of the fuel being sucked into the axial vortex of the air and increase the lateral vortex at the trailing edge.

[0016] In some embodiments of the present disclosure, the trailing edge is rectangular and forms an angle with the horizontal plane, which can reduce the resistance of the fuel being sucked into the axial vortex of the air and increase the lateral vortex at the trailing edge.

[0017] In some embodiments of the present disclosure, the trailing edge is triangular, and the trailing edge is perpendicular to a horizontal plane.

[0018] In some embodiments of the present disclosure, the angle of the first side surface is θ, where θ≤30°.

[0019] In some embodiments of the present disclosure, the length of the mixer is L, the width of the mixer is b, and the length-to-width ratio L / b is 1-2, so that the axial vortex intensity is larger and the pressure drop is smaller.

[0020] In some embodiments of the present disclosure, the height of the mixer is h, the length of the mixer is L, and the height-to-length ratio h / L is 0.2-1, so that the axial vortex intensity is larger and the pressure drop is smaller.

[0021] In some embodiments of the present disclosure, the acute angle of the second side surface is α, wherein the range of α is 30-60°, so that the axial vortex intensity is larger and the pressure drop is smaller, and the width is not too large.

[0022] In some embodiments of the present disclosure, each of the blenders is integrally connected to the nozzle.

[0023] (III) Beneficial effects

[0024] It can be seen from the above technical solutions that the integrated hydrogen-rich combustion chamber head disclosed in the present invention has at least one or part of the following beneficial effects:

[0025] (1) The integrated structure consisting of the nozzle and the mixer disclosed in the present invention can generate an axial vortex in the mixing area for mixing. Compared with the combustion chamber using a swirler, there is no recirculation zone and low-speed zone, ensuring that no self-ignition and backfire occur before the fuel and air are completely mixed.

[0026] (2) The present invention provides a spray hole at the trailing edge of the structure for fuel injection. Compared with the conventional side-opening fuel tangential injection, it is beneficial to reduce the number of openings, and the mixing effect is not affected by the combustion chamber load.

[0027] (3) The trailing edge injection of the present invention adopts a planar structure, which reduces the resistance of the fuel being sucked into the axial vortex of the air and increases the lateral vortex at the trailing edge.

[0028] (4) By optimizing the configuration of aspect ratio and height-to-length ratio, the optimal axial vortex strength and smaller pressure drop can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the assembly structure of the hydrogen-rich combustion chamber head designed in an integrated manner according to the present invention.

[0030] Figure 2a for Figure 1 A partial enlarged schematic diagram of .

[0031] Figure 2b for Figure 1 An axial view from the nozzle toward the combustion chamber.

[0032] Figure 2c for Figure 1 An axial view from the combustion chamber towards the nozzle.

[0033] Figure 3 A schematic diagram of the cross-sectional structure of the mixer of the hydrogen-rich combustion chamber head designed in an integrated manner according to the first embodiment of the present disclosure.

[0034] Figure 4a This is a schematic diagram of the main structure of the integrated hydrogen-rich combustion chamber head of the first embodiment of the present disclosure.

[0035] Figure 4b This is a schematic diagram of the top view of the integrated hydrogen-rich combustion chamber head of the first embodiment of the present disclosure.

[0036] Figure 4c A schematic side structural diagram of the integrated hydrogen-rich combustion chamber head of the first embodiment of the present disclosure.

[0037] Figure 4d This is a schematic diagram of the AA cross-sectional structure in a top view of the integrated hydrogen-rich combustion chamber head of the first embodiment of the present disclosure.

[0038] Figure 5 A schematic diagram of the flow direction of the incoming air in the head of the hydrogen-rich combustion chamber designed in an integrated manner according to the first embodiment of the present disclosure.

[0039] Figure 6 Schematic diagram of axial vortex generation in the integrated hydrogen-rich combustion chamber head of the first embodiment of the present disclosure.

[0040] Figure 7 A schematic diagram of the cross-sectional structure of the integrated hydrogen-rich combustion chamber head of the second embodiment of the present disclosure.

[0041] Figure 8a This is a schematic diagram of the main structure of the integrated hydrogen-rich combustion chamber head of the second embodiment of the present disclosure.

[0042] Figure 8b A schematic diagram of the top view of the integrated hydrogen-rich combustion chamber head according to the second embodiment of the present disclosure.

[0043] Figure 8c A schematic side structural diagram of the integrated hydrogen-rich combustion chamber head of the second embodiment of the present disclosure.

[0044] Figure 8d This is a schematic diagram of the BB cross-sectional structure in the top view of the integrated hydrogen-rich combustion chamber head of the second embodiment of the present disclosure.

[0045] Fig. 9 A schematic diagram of the flow direction of the incoming air in the head of the hydrogen-rich combustion chamber with an integrated design according to the second embodiment of the present disclosure.

[0046] Fig.10 Schematic diagram of axial vortex generation in the integrated hydrogen-rich combustion chamber head of the second embodiment of the present disclosure.

[0047] [Description of the main component symbols of the embodiment of the present disclosure in the accompanying drawings]

[0048] 10- Blender;

[0049] 11 - leading edge;

[0050] 12- tail edge;

[0051] 121- injection hole;

[0052] 13- first side;

[0053] 14 - second side;

[0054] 20-nozzle;

[0055] 30-combustion chamber;

[0056] S-mixing zone. DETAILED DESCRIPTION

[0057] The present disclosure provides an integrated design of a hydrogen-rich combustion chamber head, comprising: a nozzle and a plurality of mixers, wherein the first end of the nozzle is connected to the combustion chamber, and the plurality of mixers are respectively embedded in the first end of the nozzle, and the plurality of mixers are evenly distributed; the mixer comprises: a trailing edge, two first side surfaces, a second side surface and a leading edge, and the trailing edge is provided with at least one injection hole; the first ends of the two first side surfaces are respectively connected to the trailing edge to form an airfoil structure; the leading edge is connected to the second end of the side surface; the cavity surrounded by the two first side surfaces and the second side surface can be used as a fuel collecting chamber or to arrange a liquid fuel nozzle pipeline for multi-fuel mixing. The integrated structure composed of the nozzle and the mixer disclosed in the present disclosure can generate an axial vortex in the mixing area for mixing, and compared with a combustion chamber using a swirler, there is no recirculation zone and a low-speed zone, ensuring that no self-ignition and flashback occur before the fuel and air are completely mixed.

[0058] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0059] Certain embodiments of the present disclosure will be described more fully below with reference to the accompanying drawings, some but not all of which are shown. In fact, the various embodiments of the present disclosure may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure satisfies applicable legal requirements.

[0060] In a first exemplary embodiment of the present disclosure, a hydrogen-rich combustor head of an integrated design is provided. Figure 1 A schematic diagram of the assembly structure of the hydrogen-rich combustion chamber head designed in an integrated manner according to the present invention. Figure 2a for Figure 1 A partial enlarged schematic diagram of . Figure 2b for Figure 1 An axial view from the nozzle toward the combustion chamber. Figure 2c for Figure 1 An axial view from the combustion chamber towards the nozzle. Figure 3 A schematic diagram of the cross-sectional structure of the mixer of the hydrogen-rich combustion chamber head designed in an integrated manner according to the first embodiment of the present disclosure. Figure 4a This is a schematic diagram of the main structure of the integrated hydrogen-rich combustion chamber head of the first embodiment of the present disclosure. Figure 4b This is a schematic diagram of the top view of the integrated hydrogen-rich combustion chamber head of the first embodiment of the present disclosure. Figure 4c This is a schematic side structural diagram of the integrated hydrogen-rich combustion chamber head of the first embodiment of the present disclosure. Figure 4d This is a schematic diagram of the AA cross-sectional structure in a top view of the integrated hydrogen-rich combustion chamber head of the first embodiment of the present disclosure. Figure 5 A schematic diagram of the flow direction of the incoming air in the head of the hydrogen-rich combustion chamber designed in an integrated manner according to the first embodiment of the present disclosure. Figure 6A schematic diagram of the generation of axial vortex in the head of the hydrogen-rich combustion chamber designed in an integrated manner according to the first embodiment of the present disclosure. Figures 1 to 6 As shown, the integrated hydrogen-rich combustion chamber head of the present disclosure includes: a nozzle 20 and a plurality of mixers 10. The first end of the nozzle 20 is connected to the combustion chamber 30. The plurality of mixers 10 are respectively embedded in the first end of the nozzle 20, and the plurality of mixers 10 are evenly distributed, and each mixer 10 is integrally connected to the nozzle 20. The mixer 10 includes: a trailing edge 12, two first side surfaces 13, a second side surface 14 and a leading edge 11. The trailing edge 12 is provided with at least one injection hole 121. The first ends of the two first side surfaces 13 are respectively connected to the trailing edge 12 to form an airfoil structure, as shown in FIG. Figure 1 , Figure 2a and Figure 4b As shown. The leading edge 11 is connected to the second end of the first side surface 13. The second side surface 14 is connected to the first side surface 13, the trailing edge 12 and the leading edge 11 at the same time, and the second side surface 14 is in contact with the outer wall of the nozzle 20. The cavity surrounded by the two first side surfaces 13 and the second side surface 14 is a mixing area S, which can be used as a fuel plenum or a liquid fuel nozzle pipeline for arranging multi-fuel mixing.

[0061] like Figure 5 As shown, the incoming air generates an axial vortex on any first side surface 13. Figure 6 As shown, the hydrogen-rich fuel is mixed with the incoming air that generates an axial vortex on the first side 13 in the mixing area S through the injection hole 121. The integrated structure consisting of the nozzle and the mixer disclosed in the present invention can generate an axial vortex in the mixing area for mixing. Compared with the combustion chamber using a swirler, there is no recirculation area and low-speed area, ensuring that no self-ignition and flashback occur before the fuel and air are completely mixed.

[0062] In this embodiment, the first side surface 13 is a triangular structure, which is conducive to reducing the resistance of the fuel being sucked into the axial vortex of the air and increasing the lateral vortex at the trailing edge. The trailing edge 12 is a rectangle, and the trailing edge 12 forms an angle with the horizontal plane, which can also reduce the resistance of the fuel being sucked into the axial vortex of the air and increase the lateral vortex at the trailing edge.

[0063] Specifically, Figure 3 As shown, the included angle of the first side surface 13 is θ, where θ≤30°.

[0064] Specifically, Figure 3 As shown, the length of the mixer 10 is L, the width of the mixer 10 is b, and the length-to-width ratio L / b is 1-2, so that the axial vortex intensity is larger and the pressure drop is smaller.

[0065] Specifically, Figure 3As shown, the height of the mixer 10 is h, the length of the mixer 10 is L, and the height-to-length ratio h / L is 0.2-1. The height-to-length ratio is adjusted to make the axial vortex intensity larger and the pressure drop smaller.

[0066] Specifically, Figure 3 As shown, the acute angle of the second side surface 14 is α, wherein the range of α is 30-60°. By controlling the size of α, the axial vortex intensity is larger and the pressure drop is smaller, and the width is not too large.

[0067] In a second exemplary embodiment of the present disclosure, a hydrogen-rich combustor head of an integrated design is provided. Figure 7 A schematic diagram of the cross-sectional structure of the integrated hydrogen-rich combustion chamber head of the second embodiment of the present disclosure. Figure 8a This is a schematic diagram of the main structure of the integrated hydrogen-rich combustion chamber head of the second embodiment of the present disclosure. Figure 8b A schematic diagram of the top view of the integrated hydrogen-rich combustion chamber head according to the second embodiment of the present disclosure. Figure 8c A schematic side structural diagram of the integrated hydrogen-rich combustion chamber head of the second embodiment of the present disclosure. Figure 8d This is a schematic diagram of the BB cross-sectional structure in the top view of the integrated hydrogen-rich combustion chamber head of the second embodiment of the present disclosure. Fig. 9 A schematic diagram of the flow direction of the incoming air in the head of the hydrogen-rich combustion chamber with an integrated design according to the second embodiment of the present disclosure. Fig.10 A schematic diagram of the generation of axial vortex in the head of the hydrogen-rich combustion chamber designed in an integrated manner according to the second embodiment of the present disclosure. Figures 7 to 10 As shown, compared with the integrated hydrogen-rich combustion chamber head of the first embodiment, the integrated hydrogen-rich combustion chamber head of this embodiment is different in that the trailing edge 12 is triangular and perpendicular to the horizontal plane.

[0068] So far, the embodiments of the present disclosure have been described in detail in conjunction with the accompanying drawings. It should be noted that the implementation methods not shown or described in the drawings or the body of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each element and method are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0069] Based on the above description, those skilled in the art should have a clear understanding of the integrated design of the hydrogen-rich combustion chamber head disclosed herein.

[0070] In summary, the present disclosure provides an integrated design of a hydrogen-rich combustion chamber head with an integrated structure consisting of a nozzle and a mixer, which can generate an axial vortex in the mixing area for mixing. Compared with a combustion chamber using a swirler, there is no recirculation zone and a low-speed zone, ensuring that no self-ignition and flashback occur before the fuel and air are completely mixed. Starting from the chemical mechanism, the present disclosure modifies the combustion chamber without modifying the overall layout by designing the flame position, and adjusts the pneumatic combustion layout of the hydrogen combustion chamber, which plays an important role in the application of hydrogen-rich fuels.

[0071] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure.

[0072] Moreover, the shapes and sizes of the components in the figures do not reflect the real size and proportion, but only illustrate the contents of the embodiments of the present disclosure. In addition, in the claims, any reference symbols between brackets shall not be constructed as limiting the claims.

[0073] Unless otherwise indicated, the numerical parameters in this specification and the appended claims are approximate values ​​and can vary according to the desired properties obtained through the content of the present disclosure. Specifically, all numbers used in the specification and claims to express the content of the composition, reaction conditions, etc., should be understood to be modified by the term "about" in all cases. In general, the meaning of the expression is to include changes of ±10% in some embodiments, ±5% in some embodiments, ±1% in some embodiments, and ±0.5% in some embodiments by a specific number.

[0074] Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

[0075] The ordinal numbers used in the specification and claims, such as "first", "second", "third", etc., to modify the corresponding elements, do not themselves mean that the elements have any ordinal numbers, nor do they represent the order of one element and another element, or the order in the manufacturing method. The use of these ordinal numbers is only used to clearly distinguish a component with a certain name from another component with the same name.

[0076] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various disclosed aspects, in the above description of the exemplary embodiments of the present disclosure, the various features of the present disclosure are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the following intention: the claimed disclosure requires more features than the features explicitly recited in each claim. More specifically, as reflected in the claims below, the disclosed aspects are less than all the features of the single embodiment disclosed above. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present disclosure.

[0077] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present disclosure. It should be understood that the above description is only a specific embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. An integrated hydrogen-rich combustion chamber head, comprising: a nozzle, wherein a first end of the nozzle is connected to the combustion chamber; A plurality of mixers are respectively embedded in the first end of the nozzle, and the plurality of mixers are evenly distributed; The area between two adjacent mixers is a mixing area for the incoming air and hydrogen. The mixer includes: a trailing edge provided with at least one injection hole; At least two first side surfaces, wherein first ends of the two first side surfaces are respectively connected to the trailing edge to form an airfoil-shaped structure; A front edge is connected to the second end of the first side surface.

2. The integrated hydrogen-rich combustion chamber head according to claim 1, wherein: The blender also includes: The second side surface is connected to the first side surface, the trailing edge and the leading edge at the same time, and the second side surface is in contact with the outer wall of the nozzle.

3. The integrated hydrogen-rich combustion chamber head according to claim 1, wherein: The first side surface is a triangular structure.

4. The integrated hydrogen-rich combustion chamber head according to claim 1, wherein: The trailing edge is rectangular, and forms an angle with a horizontal plane.

5. The integrated hydrogen-rich combustion chamber head according to claim 1, wherein: The trailing edge is triangular and perpendicular to the horizontal plane.

6. The integrated hydrogen-rich combustion chamber head according to claim 3, wherein: An angle among the first side surfaces is θ, and the angle is opposite to the side where the first side surface and the trailing edge intersect; wherein θ≤30°.

7. The integrated hydrogen-rich combustion chamber head according to any one of claims 1 to 6, wherein: The length of the blender is L, the width of the blender is b, and the aspect ratio L / b is 1-2.

8. The integrated hydrogen-rich combustion chamber head according to any one of claims 1 to 6, wherein: The height of the blender is h, the length of the blender is L, and the height-to-length ratio h / L is 0.2-1.

9. The integrated hydrogen-rich combustion chamber head according to claim 2, wherein: The acute angle in the second side surface is α, and the angle α is the diagonal angle of the auxiliary angle, and the auxiliary angle is the angle between the side where the second side surface intersects with the trailing edge and the side where the second side surface intersects with the first side surface; wherein the range of α is 30~60°.

10. The integrated hydrogen-rich combustion chamber head according to any one of claims 1 to 6, wherein: Each of the blenders is integrally connected to the nozzle.

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