Water wave guiding structure and water wave energy recovery system

Abstract

This application relates to the field of water wave control, and in particular to a water wave guiding structure and a water wave energy recovery system. To concentrate the energy of water waves, this application provides a water wave guiding structure, comprising: guiding units, including a solid water-blocking part and at least two first water channels and at least two second water channels formed by the solid water-blocking part; the intersection of the first and second water channels forms an intersection region; the segments of each water channel located between adjacent intersection regions constitute intracellular coupling water channels, and the remaining segments constitute intercellular coupling water channels; the guiding units are arranged in an array to form a first topological domain and a second topological domain; the guiding units within the first and second topological domains have different structures and opposite intracellular and intercellular coupling strengths; the boundary region between the first and second topological domains constitutes a guiding region for guiding water waves, and a corner enhancement region is formed at the corner of the guiding region to concentrate the energy of the water waves.

Description

Technical Field

[0001] This application relates to the field of water wave control, and in particular to a water wave guiding structure and a water wave energy recovery system. Background Technology

[0002] Water wave energy recovery devices are installed in the sea or river. When water waves are generated on the surface of the sea or river, these devices can convert the mechanical energy of the water waves into electrical energy. If only a small number of these devices are installed, the vast majority of the water waves will not reach them, causing most of the mechanical energy contained in the water waves to dissipate naturally and not be converted into electrical energy. If a large number of devices are installed, the cost will be high. Furthermore, the amount of energy reaching a single device is always relatively small, resulting in low energy recovery efficiency for each device. Summary of the Invention

[0003] The first aspect of this application provides a water wave guiding structure, comprising: Multiple guiding cells, each guiding cell including a solid water-blocking part formed of impermeable material and at least two first water channels and at least two second water channels formed by the solid water-blocking part for guiding water waves. Each first water channel and each second water channel penetrates the guiding cell. The first water channels extend along the x-direction and are spaced apart along the y-direction. The second water channels extend along the y-direction and are spaced apart along the x-direction. The x-direction and the y-direction are perpendicular to each other. Each first water channel intersects with each second water channel. The intersection of each first water channel and each second water channel forms an intersection area. The sections of the first water channels and second water channels located between adjacent intersection areas constitute intracellular coupling water channels. The sections of the first water channels and second water channels located between the edge of the guiding cell and the intersection areas adjacent to the edge of the guiding cell constitute intercellular coupling water channels. The first topological domain is formed by the arrangement of the plurality of guiding primitive cells. Within the first topological domain, in the x-direction and / or the y-direction, the flow area of ​​the intracellular coupling channel is greater than the flow area of ​​the intercellular coupling channel. The second topological domain is formed by an array of multiple guiding cells that are different from the guiding cells in the first topological domain. In the second topological domain, the flow area of ​​the intracellular coupling channel is smaller than the flow area of ​​the intercellular coupling channel in the x-direction and / or the y-direction. The intercellular coupling channels of adjacent guiding primitive cells are aligned and connected to each other; The first and second topological domains are spliced ​​together, and the boundary region between the first and second topological domains constitutes a guiding region for guiding water waves and supporting the eigenstates of water waves, including edge states.

[0004] In some embodiments, the guiding region includes at least one corner, and the corner of the guiding region constitutes a corner enhancement region for supporting the eigenstates of water waves, including the angular state.

[0005] In some embodiments, at least one of the corners is a right angle.

[0006] In some embodiments, the flow area of ​​the intracellular coupling channel in the first topological domain is equal to the flow area of ​​the intercellular coupling channel in the second topological domain. The flow area of ​​the intercellular coupling channel in the first topological domain is equal to the flow area of ​​the intracellular coupling channel in the second topological domain.

[0007] In some embodiments, the cross-section of the guiding unit cell parallel to the planes containing the x and y directions is a square with side length a, and the cross-section of the intersection region parallel to the planes containing the x and y directions is a square with side length d.

[0008] In some embodiments, the ratio of the frequencies f and d of the water waves guided by the water wave guiding structure to a is positively correlated.

[0009] In some embodiments, both the intracellular coupling channel and the intercellular coupling channel are cuboid channels; Within the first topological domain, on a cross-section parallel to the planes containing the x and y directions, the width of the intracellular coupling channel is b1, and the width of the intercellular coupling channel is b2. Within the second topological domain, on a cross-section parallel to the planes containing the x and y directions, the width of the intracellular coupling channel is b2, and the width of the intercellular coupling channel is b1. The frequency f of the water wave guided by the water wave guiding structure is positively correlated with the ratio of b2 to b1.

[0010] In some embodiments, 1.3 ≤ d / b1 ≤ 1.7, 2 ≤ b1 / b2 ≤ 4.

[0011] In some embodiments, the distance between two adjacent first waterways is equal to the distance between two adjacent second waterways.

[0012] A second aspect of this application provides a water wave energy recovery system, including a water wave energy recovery device and any of the above-mentioned water wave guiding structures, wherein the water wave energy recovery device is disposed in the confluence area of ​​the guiding area.

[0013] The water wave guiding structure of the first aspect of this application has at least the following beneficial effects: by using guiding units to form two different topological domains, and forming a guiding region at the boundary between the two topological domains, water waves can propagate along the guiding region, thereby concentrating the energy of the water waves within the guiding region.

[0014] In addition to the aforementioned beneficial effects, the water wave energy recovery system of the second aspect of this application also has at least the following beneficial effects: the energy of the water wave is concentrated in the guiding area, and the water wave energy recovery device set in the confluence area of ​​the guiding area can recover the energy of the water wave, and the energy recovery efficiency is high. Attached Figure Description

[0015] Figure 1a This is a schematic diagram of the guiding unit cell of the coupling prototype in an embodiment of the water wave guiding structure of this application.

[0016] Figure 1b This is a schematic diagram of the structure of a guiding unit cell in the first coupling configuration of the water wave guiding structure embodiment of this application.

[0017] Figure 1c This is a schematic diagram of another guiding unit cell in the first coupling configuration of the water wave guiding structure embodiment of this application.

[0018] Figure 1d This is a schematic diagram of the guiding unit cell of the second coupling configuration in an embodiment of the water wave guiding structure of this application.

[0019] Figure 1e This is a schematic diagram of another guiding unit cell in the second coupling configuration of the water wave guiding structure embodiment of this application.

[0020] Figure 1f This is a schematic diagram of the guiding unit cell in the third coupling configuration of the water wave guiding structure in this application.

[0021] Figure 2 This is a schematic diagram of the structure of the first type of water wave guiding structure of this application.

[0022] Figure 3 This is a schematic diagram of the corner enhancement region of the water wave guiding structure in this application.

[0023] Figure 4 This is a schematic diagram comparing the water wave guiding structure of this application with the water depth.

[0024] Figure 5 This is a schematic diagram of the water wave guiding structure used in this application when the water surface is excited by point waves.

[0025] Figure 6This is a graph showing the relationship between the intrinsic mode numbers and intrinsic frequencies of the water wave guiding structure in this application in a finite-size structure. In the graph, volume mode, edge mode and corner mode are distinguished by legend.

[0026] Figure 7a This is a simulation diagram of the intrinsic mode distribution when the frequency of the water wave is 3.73-3.84 Hz and the water wave is in the edge state, which is a second embodiment of the water wave guiding structure of this application.

[0027] Figure 7b This is a simulation diagram of the intrinsic mode distribution when the frequency of the water wave is 3.99 Hz and the water wave is in an angular state, which is a second embodiment of the water wave guiding structure of this application.

[0028] Figure 7c This is a simulation diagram of the intrinsic mode distribution when the water wave frequency is 4.36 Hz and the water wave is in a bulk state, which is a second embodiment of the water wave guiding structure of this application.

[0029] Figure 8a This is a graph showing the relationship between the frequency of the water wave and the density of states of the water wave eigenstates when the water surface is excited by point waves and the water wave guidance structure of this application is used.

[0030] Figure 8b This is a diagram showing the relationship between the incident direction of the water wave, the frequency of the water wave, and the density of states of the water wave eigenstates when the water wave guiding structure of this application is used and the water surface is excited by a plane wave.

[0031] Figure 8c This is a simulation diagram of the water wave energy when the water surface is excited by a plane wave in the first embodiment of the water wave guiding structure of this application, the water wave frequency is 4.0 Hz and the water wave is incident from the left.

[0032] Figure 8d This is a simulation diagram of the water wave energy when the water surface is excited by a plane wave in the first embodiment of the water wave guiding structure of this application, the water wave frequency is 4.0 Hz and the water wave is incident from the right side.

[0033] Figure 9a This is a simulation diagram of the water wave energy when the water surface is excited by point waves in the third embodiment of the water wave guiding structure of this application, the water wave frequency is 4.00 Hz and the water wave is in an angular state.

[0034] Figure 9b This is a simulation diagram of the water wave energy when the water surface is excited by point waves in the third embodiment of the water wave guiding structure of this application, the water wave frequency is 4.56 Hz and the water wave is in a bulk state.

[0035] Figure 9cThis is a simulation diagram of the water wave energy when the water surface is excited by point waves in the third embodiment of the water wave guiding structure of this application, the water wave frequency is 3.76 Hz and the water wave is in the edge state.

[0036] Figure 9d This is a simulation diagram of the water wave energy when the water surface is excited by point waves in the first embodiment of the water wave guiding structure of this application, the water wave frequency is 3.76 Hz and the water wave is in the edge state.

[0037] Figure 10 The frequency and characteristic function of water waves The relationship diagram.

[0038] Figure 11 The frequency and characteristic function of water waves The relationship diagram.

[0039] Figure 12 This is a graph showing the relationship between the frequency of water waves and the water depth.

[0040] Figure 13a This is a schematic diagram of the x-axis topological phase of the guiding unit cell in the first coupling configuration.

[0041] Figure 13b This is a schematic diagram of the y-direction topological phase of the guiding unit cell in the first coupling configuration.

[0042] Figure 13c This is a schematic diagram of the x-axis topological phase of the guiding unit cell in the second coupling configuration.

[0043] Figure 13d This is a schematic diagram of the y-direction topological phase of the guiding unit cell in the second coupling configuration.

[0044] Figure 13e This is a schematic diagram of the x-axis topological phase of the guiding unit cell in the third coupling configuration.

[0045] Figure 13f This is a schematic diagram of the y-direction topological phase of the guiding unit cell in the third coupling configuration.

[0046] Figure 14a The diagram showing the relationship between the frequency of water waves and the eigenstates of water waves when the guiding unit cells of the second coupling configuration are arranged around the guiding unit cells of the first coupling configuration.

[0047] Figure 14b The diagram showing the relationship between the frequency of water waves and the eigenstates of water waves when the guiding unit cells of the first coupling configuration are arranged around the guiding unit cells of the third coupling configuration.

[0048] Figure 14c This is a simulation diagram showing the water wave in the edge state when the guiding unit cell of the first coupling configuration is arranged around the guiding unit cell of the third coupling configuration.

[0049] Figure 15 This is a schematic diagram of a third embodiment of the water wave guiding structure of this application.

[0050] Figure 16 This is a flowchart illustrating the design process of the water wave guiding structure in this application.

[0051] Explanation of key component symbols: Water wave guiding structure 100; guiding unit cell 10; solid water blocking part 101; confluence region 11; intracellular coupling waterway 12; intercellular coupling waterway 13; first waterway 15; second waterway 16; first topological domain 20; second topological domain 30; guiding region 40; guiding region port 41; corner enhancement region 50; feature region 60; water surface 70; point excitation region 80.

[0052] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0053] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0054] It should be noted that, in the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this article is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0055] In the embodiments of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more, and "at least one" and "one or more" refer to one, two, or more than two. The singular expressions "a," "an," "the," "the," "this," and "this" are intended to also include expressions such as "one or more," unless the context explicitly indicates otherwise.

[0056] The water wave guiding structure of this application is composed of multiple three-dimensional guiding units arranged in a spatial array. The guiding unit is the basic unit constituting the water wave guiding structure. Furthermore, the water wave guiding structure of this application includes two different types of guiding units: a first coupling configuration, a second coupling configuration, and a third coupling configuration. To facilitate understanding by those skilled in the art, the guiding units will be introduced before describing the overall structure of the water wave guiding structure.

[0057] The guiding cells of the first coupling configuration, the second coupling configuration, and the third coupling configuration are obtained by modifying the guiding cells of the coupling prototype. Therefore, before describing the guiding cells of the first coupling configuration, the second coupling configuration, and the third coupling configuration, we will start by introducing the guiding cells of the coupling prototype.

[0058] Please see Figure 1a The guiding unit cell 10 of the coupling prototype includes a solid water-blocking portion 101, a junction region 11, an intracellular coupling channel 12, and an intercellular coupling channel 13, all formed of an impermeable material. The junction region 11, the intracellular coupling channel 12, and the intercellular coupling channel 13 are formed by the solid water-blocking portion 101. The impermeable material includes at least one of photocurable resin, plastic, acrylic, metal, ceramic, or concrete. In some embodiments, the solid water-blocking portion 101 is fabricated using a photocurable 3D printing method.

[0059] The solid water-blocking part 101 has water channels and / or different solid water-blocking parts 101 form water channels, so that the solid water-blocking part 101 forms at least two first water channels 15 for guiding water waves and at least two second water channels 16 for guiding water waves. Each first water channel 15 and each second water channel 16 penetrates the guiding unit cell 10. The first water channels 15 extend along the x direction and are spaced apart along the y direction, and the second water channels 16 extend along the y direction and are spaced apart along the x direction. The x direction and the y direction are perpendicular to each other. Each of the first waterways 15 intersects with each of the second waterways 16. The intersection area 11 is formed by the intersection of each of the first waterways 15 and each of the second waterways 16. The intracellular coupling waterway 12 is formed by the segments of the first waterway 15 and the second waterway 16 located between adjacent intersection areas 11. The intercellular coupling waterway 13 is formed by the segments of the first waterway 15 and the second waterway 16 located between the edge of the guiding protocell 10 and the intersection area 11 adjacent to the edge of the guiding protocell 10.

[0060] In some embodiments, the spacing between two adjacent first waterways 15 is equal to the spacing between two adjacent second waterways 16, thereby increasing the spacing d between two adjacent confluence areas 11 in the x-direction. xThe distance d between two adjacent intersection zones 11 in the y direction y Equal. In the guiding unit cell 10 of the coupled prototype, b in =b out The flow area of ​​the intracellular coupling channel 12 is equal to the flow area of ​​the intercellular coupling channel 13. Where, b in b is the width of the intracellular coupling channel 12. out The width of the intercellular coupling channel 13.

[0061] Please see Figure 1b and Figure 1c , Figure 1b and Figure 1c The first coupling configuration guide cell 10 is shown. Unlike the coupling prototype guide cell 10, in the first coupling configuration guide cell 10, the flow area of ​​the intracellular coupling channel 12 is larger than the flow area of ​​the intercellular coupling channel 13 in both the x and y directions. Figure 1b and Figure 1c The difference shown in the guiding unit cell 10 is: Figure 1b The guide cell 10 shown includes two first channels 15 and two second channels 16; Figure 1c The shown guide cell 10 includes two first channels 15 and three second channels 16.

[0062] Please see Figure 1d and Figure 1e , Figure 1d and Figure 1e The guide cell 10 of the second coupling configuration is shown. Unlike the guide cell 10 of the coupling prototype, in the guide cell 10 of the second coupling configuration, the flow area of ​​the intracellular coupling channel 12 is smaller than the flow area of ​​the intercellular coupling channel 13 in both the x and y directions. Figure 1d and Figure 1e The difference shown in the guiding unit cell 10 is: Figure 1d The guide cell 10 shown includes two first channels 15 and two second channels 16; Figure 1e The shown guide cell 10 includes three first channels 15 and three second channels 16.

[0063] In other embodiments, the first waterway 15 may have three, four or more channels, and the second waterway 16 may also have three, four or more channels. The number of channels in the first waterway 15 and the second waterway 16 may be equal or unequal.

[0064] Please see Figure 1f , Figure 1fThe guide cell 10 of the third coupling configuration is shown. Unlike the guide cell 10 of the coupling prototype, in the guide cell 10 of the third coupling configuration, the flow area of ​​the intracellular coupling channel 12 is greater than or less than the flow area of ​​the intercellular coupling channel 13 in the x or y direction. For example, in the x-direction, the flow area of ​​the intracellular coupling channel 12 is greater than the flow area of ​​the intercellular coupling channel 13; in the y-direction, the flow area of ​​the intracellular coupling channel 12 is less than or equal to the flow area of ​​the intercellular coupling channel 13. Figure 1f The diagram shows the case where the flow area of ​​the intracellular coupling channel 12 in the x-direction is greater than that of the intercellular coupling channel 13, and the flow area of ​​the intracellular coupling channel 12 in the y-direction is less than that of the intercellular coupling channel 13.

[0065] In some embodiments, the flow area of ​​the confluence region 11 is larger than that of the intracellular coupling channel 12 and the intercellular coupling channel 13. Therefore, the confluence region 11 serves as the main resonant region of the water wave, and the intracellular coupling channel 12 and the intercellular coupling channel 13 are used to control the coupling strength between adjacent confluence regions 11.

[0066] Please see Figure 2 The water wave guiding structure 100 includes a first topological domain 20 and a second topological domain 30, which are formed by an array of multiple guiding units 10 in a three-dimensional space. The first topological domain 20 and the second topological domain 30 are connected together. Within the first topological domain 20, the guiding units 10 have a first coupling configuration; within the second topological domain 30, the guiding units 10 have a second coupling configuration. The intercellular coupling channels 13 of adjacent guiding units 10 are mutually coupled, meaning that the intercellular coupling channels 13 of adjacent guiding units 10 are aligned and connected, thereby connecting the channels in adjacent guiding units 10 through the intercellular coupling channels 13. Furthermore, the boundary region between the first topological domain 20 and the second topological domain 30 constitutes a guiding region 40 for guiding water waves and supporting the eigenstates of water waves, including edge states. The guiding region 40 is not an independent region; part of the guiding region 40 is the first topological domain 20, and the other part is the second topological domain 30.

[0067] In some embodiments, within the first topological domain 20, the guiding cell 10 can be any one of a first coupling configuration, a second coupling configuration, or a third coupling configuration; within the second topological domain 30, the guiding cell 10 can also be any one of a first coupling configuration, a second coupling configuration, or a third coupling configuration, but the structures of the guiding cells 10 in the first topological domain 20 and the guiding cells 10 in the second topological domain 30 are different. For example, the guiding cells 10 in the first topological domain 20 and the guiding cells 10 in the second topological domain 30 are different. When all guiding cells 10 are of the third coupling configuration, within the first topological domain 20, in the x-direction, the flow area of ​​the intracellular coupling channel 12 is greater than that of the intercellular coupling channel 13, and in the y-direction, the flow area of ​​the intracellular coupling channel 12 is smaller than that of the intercellular coupling channel 13. However, within the second topological domain 30, in the x-direction, the flow area of ​​the intracellular coupling channel 12 is smaller than that of the intercellular coupling channel 13, and in the y-direction, the flow area of ​​the intracellular coupling channel 12 is greater than that of the intercellular coupling channel 13. Therefore, the guiding cell 10 within the first topological domain 20 can be obtained within the second topological domain 30 after rotating 90°.

[0068] In some embodiments, the flow area of ​​the intracellular coupling channel 12 within the first topological domain 20 is equal to the flow area of ​​the intercellular coupling channel 13 within the second topological domain 30; the flow area of ​​the intercellular coupling channel 13 within the first topological domain 20 is equal to the flow area of ​​the intracellular coupling channel 12 within the second topological domain 30. In this case, the first coupling configuration and the second coupling configuration are opposite configurations, and they have opposite relationships in terms of the strength of intracellular and intercellular coupling.

[0069] For example, in some embodiments, both the intracellular coupling channel 12 and the intercellular coupling channel 13 are cuboid channels; within the first topological domain 20, on a cross-section parallel to the planes containing the x and y directions, the width of the intracellular coupling channel 12 is b1, and the width of the intercellular coupling channel 13 is b2; within the second topological domain 30, on a cross-section parallel to the planes containing the x and y directions, the width of the intracellular coupling channel 12 is b2, and the width of the intercellular coupling channel 13 is b1.

[0070] It should be noted that, Figure 2 The structure shown represents a first-type water waveguide structure 100, in which the guide region port 41 located at the edge of the guide region 40 is composed of a confluence region 11 of incomplete guide cells 10 less than half the size of the guide cells 10. For example, in Figure 2In the second topological domain 30, complete guiding units 10 are arranged in a 4×4 array, and incomplete guiding units 10 are connected below and to the right of the array formed by the complete guiding units 10. The first topological domain 20 also has incomplete guiding units 10 of a first coupling configuration coupled to the incomplete guiding units 10 in the second topological domain 30. Each incomplete guiding unit 10 is formed by less than half a guiding unit 10. When each complete guiding unit 10 has four intersection regions 11, the incomplete guiding unit 10 has only two intersection regions 11, which constitute the guiding region port 41. In this case, the first type of water wave guiding structure 100 can be considered to have a first type of guiding region port 41.

[0071] In the water wave guiding structure 100, two different topological domains are formed using guiding unit cells 10, and a guiding region 40 is formed at the boundary between the two topological domains, thereby allowing water waves to propagate along the guiding region 40 and concentrating the energy of the water waves within the guiding region 40. Simultaneously, the water wave guiding structure 100 exhibits a certain degree of robustness, ensuring that the energy of the water waves is concentrated within the guiding region 40 even in cases of missing local confluence areas 11, local channel size deviations, or positional deviations of the local confluence areas 11.

[0072] In some embodiments, please refer to Figure 2 and Figure 3 The guiding region 40 includes at least one corner, and the corner of the guiding region 40 constitutes a corner enhancement region 50 for supporting the eigenstates of the water wave, including the angular state, to further concentrate the energy of the water wave. Within the guiding region 40, the coupling point of the guiding unit cell 10 of the first coupling configuration and the guiding unit cell 10 of the second coupling configuration forms a characteristic region 60, which is formed by the coupling of inter-cell coupling channels 13 with smaller flow areas and inter-cell coupling channels 13 with larger flow areas. Furthermore, when the two guiding unit cells 10 of the first coupling configuration are coupled, only the inter-cell coupling channels 13 with smaller flow areas are coupled, and the characteristic region 60 is not formed; when the two guiding unit cells 10 of the second coupling configuration are coupled, only the inter-cell coupling channels 13 with larger flow areas are coupled, and the characteristic region 60 is not formed either.

[0073] In some embodiments, at least one corner is a right angle, and the corner enhancement region 50 formed at the right angle has a good enhancement effect.

[0074] Please see Figure 4When using the water wave guiding structure 100, the plane formed by the x and y directions can be parallel to the horizontal plane, and it is necessary to ensure that the height H of the solid water blocking part 101 is greater than the height h of the water surface 70, that is, the height H of the solid water blocking part 101 is greater than the water depth h, so as to ensure that the water waves on the water surface propagate in the first waterway 15 and the second waterway 16, so that the first waterway 15 and the second waterway 16 can guide the water waves, that is, to ensure that the water waves will not overflow the water wave guiding structure 100 and cause the water wave guiding structure 100 to fail.

[0075] In some embodiments, the cross-section of the guiding cell 10 parallel to the planes containing the x and y directions is a square with a side length of 'a', and the cross-section of the confluence region 11 parallel to the planes containing the x and y directions is a square with a side length of 'd'. This structure is simple and facilitates the array arrangement of the guiding cells 10. The value of 'a' can be 0.4 m, 0.6 m, or other values. The side length 'a' of the guiding cell 10 can be adjusted according to the target operating frequency and the actual application scenario. While maintaining the geometric proportions of the guiding cells 10, as the side length 'a' increases, the side length 'd' of the confluence region 11, the width and spacing of the intracellular coupling channels 12 and intercellular coupling channels 13 increase accordingly, resulting in an overall decrease in the target operating frequency of the wave guiding structure 100.

[0076] In some embodiments, the cross-section of the guide cell 10 parallel to the planes containing the x and y directions may also be honeycomb-shaped to facilitate the arraying of the guide cells 10; the cross-section of the intersection region 11 parallel to the planes containing the x and y directions may also be circular, hexagonal or other shapes.

[0077] In some embodiments, 3 ≤ d / a ≤ 5, 1.3 ≤ d / b1 ≤ 1.7, 2 ≤ b1 / b2 ≤ 4, 1.5 ≤ d x / a≤2.5,1.5≤d x / a≤2.5.

[0078] In some embodiments, a = 4.5 cm, d = a / 4.5, b1 = d / 1.5, b2 = b1 / 3, d x =a / 2,d y =d x Please see Figure 5 Point wave excitation can be applied to the point excitation region 80, thereby generating water waves on the water surface 70. (See also...) Figure 6When the frequency of the water wave is less than 3.73 Hz and greater than 4.2 Hz, the eigenstate of the water wave is a volume state, and the water wave guiding structure 100 does not exhibit obvious edge guiding or corner enhancement characteristics. At this time, this frequency range is not the target operating frequency range of the water wave guiding structure 100. When the excitation frequency is between 3.73 and 3.84 Hz, the eigenstate of the water wave is an edge state, that is, the mode distribution is mainly located in the guiding region 40. At this time, the water wave guiding structure 100 is in the boundary guiding mode. When the excitation frequency is 3.99 Hz, the eigenstate of the water wave is a corner state, that is, the mode distribution is mainly concentrated in the corner enhancement region 50, and the energy of the water wave is mainly concentrated in the corner enhancement region 50. At this time, the water wave guiding structure 100 is in the corner enhancement mode.

[0079] Given a = 4.5 cm, d = a / 4.5, b1 = d / 1.5, b2 = b1 / 3, d x =a / 2,d y =d x In the embodiments, please refer to Figure 7a When the first topological domain 20 surrounds the second topological domain 30, the edge-state eigenmode distribution with frequencies of 3.73 to 3.84 Hz is mainly located within the guiding region 40 at the boundary between the first and second topological domains 20 and 30; please refer to... Figure 7b When the first topological domain 20 is arranged around the second topological domain 30, the angular intrinsic mode distribution with a frequency of 3.99 Hz is mainly concentrated in the corner enhancement region 50, especially the characteristic region 60 in the corner enhancement region 50 and the intersection region 11 connected to the characteristic region 60 and located in the second topological domain 30; please refer to Figure 7c When the first topological domain 20 is set up around the second topological domain 30, the distribution of the bulk intrinsic modes at a frequency of 4.36 Hz is relatively extended, and no obvious edge mode guidance or corner enhancement characteristics are shown. Therefore, 4.36 Hz is not within the target operating frequency range of the water wave guiding structure 100.

[0080] in, Figure 7a , Figure 7b and Figure 7c The document provides a second type of water wave guiding structure 100. The difference between the second type of water wave guiding structure 100 and the first type of water wave guiding structure 100 lies in the different boundary truncation methods at the ends of the guiding regions. Specifically, in the second type of water wave guiding structure 100, the incomplete guiding unit cell 10 located at the end of the guiding region 40 has a different truncation form than that of the first type of water wave guiding structure 100, thus forming different guiding region ports 41. Both the first type of water wave guiding structure 100 and the second type of water wave guiding structure 100 are formed by splicing together a first topological domain 20 and a second topological domain 30, and a guiding region 40 is formed at their junction.

[0081] Given a = 4.5 cm, d = a / 4.5, b1 = d / 1.5, b2 = b1 / 3, d x =a / 2,d y =d x In the embodiments, please refer to Figure 8a When point wave excitation is applied to the water surface 70, the water wave is in the edge state when the excitation frequency is between 3.73 and 3.84 Hz, that is, the water wave mainly propagates along the guiding region 40. At this time, the water wave guiding structure 100 is in the boundary guiding mode. When the excitation frequency is 3.99 Hz, the water wave is in the corner state, that is, the energy of the water wave is mainly concentrated in the corner enhancement region 50. At this time, the water wave guiding structure 100 is in the corner enhancement mode. When the excitation frequency is greater than 4.2 Hz, the water wave is in the volume state, and the water wave guiding structure 100 has almost no effect. At this time, this frequency range is not the target operating frequency range of the water wave guiding structure 100.

[0082] Please see Figure 8b A plane wave excitation is applied to the water surface 70. When the plane wave is incident from the left, it exhibits peaks at 3.8 Hz and 4.0 Hz. Therefore, the wave guiding structure 100 can effectively concentrate the energy of plane waves with frequencies of 3.8 Hz and 4.0 Hz incident from the left. When the plane wave is incident from the right, it exhibits a peak at 4.0 Hz. Therefore, the wave guiding structure 100 can effectively concentrate the energy of plane waves with a frequency of 4.0 Hz incident from the right. Please refer to [link to relevant documentation]. Figure 8c When a plane wave is incident from the left and the excitation frequency is 4.0 Hz, the water wave guiding structure 100 can effectively concentrate the energy of the water wave; please refer to Figure 8d When a plane wave is incident from the right and the excitation frequency is 4.0 Hz, the water wave guiding structure 100 can also concentrate the energy of the plane wave, but the concentration effect is poor.

[0083] Please see Figure 9a When the point wave excitation is applied at the position shown by the pentagram in the figure and the excitation frequency is 4.0 Hz, the water wave is in an angular state, and the water wave energy is mainly concentrated within the corner local enhancement region 50. At this time, the water wave guiding structure 100 is in the corner local enhancement mode; please refer to Figure 9b When point wave excitation is applied at the position shown by the pentagram in the figure and the excitation frequency is 4.56 Hz, the water wave is in a bulk state and does not exhibit obvious boundary guidance or corner local enhancement effects. This frequency is not within the target operating frequency range of the water wave guiding structure 100; please refer to [link / reference]. Figure 9c and Figure 9d When the point wave excitation is applied at the position shown by the pentagram in the figure and the excitation frequency is 3.76 Hz, the water wave is in the boundary state. The water wave energy is mainly distributed along the guiding region 40, and is not mainly concentrated in the corner local enhancement region 50. At this time, the water wave guiding structure 100 is in the boundary guiding mode.

[0084] in, Figure 9c The third type of water waveguide structure 100 is shown. Figure 9d Still showing the first type of water wave guiding structure 100, which will Figure 9c and Figure 9d A comparison reveals that the difference between the third type of water wave guiding structure 100 and the first type of water wave guiding structure 100 lies in the different guiding region ports 41. The first type of water wave guiding structure 100 possesses the first type of guiding region port 41 described above, such as... Figure 9c As shown, in the third type of water wave guiding structure 100, the guiding region port 41 located at the edge of the guiding region 40 is composed of the confluence region 11 of more than 1 / 2 of the incomplete guiding unit cells 10. For example, in Figure 9c In the second topological domain 30, complete guiding units 10 are arranged in a 3×3 array, and incomplete guiding units 10 are connected below and to the right of the array formed by the complete guiding units 10. The first topological domain 20 also has incomplete guiding units 10 of a first coupling configuration coupled to the incomplete guiding units 10 in the second topological domain 30. Each incomplete guiding unit 10 is formed by more than half a guiding unit 10. When each complete guiding unit 10 has four confluence regions 11, the incomplete guiding unit 10 also has four confluence regions 11, two of which constitute guiding region ports 41. In this case, the third type of water wave guiding structure 100 can be considered to have a second type of guiding region port 41. When point wave excitation is applied within the guiding region 40, the guiding region port 41 constitutes the water wave outlet.

[0085] In some embodiments, d = a / 4.5, b1 = d / 1.5, b2 = b1 / 3, d x =a / 2,d y =d x Please see Figure 10 Keeping other parameters constant, we plot the frequency f and characteristic function with the ratio of d to a as the independent variable. The image shows that the frequency f of the water waves in the edge and corner states is related to the characteristic function. Positive correlation, where the characteristic function Therefore, the ratio of the frequencies f and d of the water waves guided by the water wave guiding structure 100 to a is positively correlated.

[0086] In summary, the ratio of d to a can be adjusted to adjust the frequency f of the water waves that the water wave guiding structure 100 can guide, that is, to adjust the target operating frequency range of the water wave guiding structure 100, that is, to adjust the frequency f of the edge state and corner state water waves that the water wave guiding structure 100 can guide.

[0087] In some embodiments, a = 4.5 cm, d = a / 4.5, b1 = d / 1.5, b2 = b1 / 3, d x =a / 2,d y =d x Please see Figure 11 Keeping other parameters constant, the ratio of b2 to b1 is used as the independent variable to plot the frequency f and the characteristic function. The image shows that the frequency f of the water waves in the edge and corner states is related to the characteristic function. Positive correlation, where the characteristic function Therefore, the frequency f of the water wave guided by the water wave guiding structure 100 is positively correlated with the ratio of b2 to b1.

[0088] In summary, the ratio of b2 to b1 can be adjusted to adjust the frequency f of the water waves that the water wave guiding structure 100 can guide, that is, to adjust the target operating frequency range of the water wave guiding structure 100, that is, to adjust the frequency f of the edge state and corner state water waves that the water wave guiding structure 100 can guide.

[0089] In some embodiments, a = 4.5 cm, d = a / 4.5, b1 = d / 1.5, b2 = b1 / 3, d x =a / 2,d y =d x Please see Figure 12 Keeping other parameters constant, plotting the frequency f against the water depth h with the water depth h as the independent variable reveals that the frequency f of the water waves in the edge and angular states is positively correlated with the water depth h.

[0090] In summary, the water depth h can be adjusted, thereby adjusting the frequency f of the water waves that the water wave guiding structure 100 can guide, that is, adjusting the target operating frequency range of the water wave guiding structure 100, that is, adjusting the frequency f of the edge state and corner state water waves that the water wave guiding structure 100 can guide.

[0091] In practical engineering, those skilled in the art can choose to adjust at least one of the following three factors according to actual needs: the ratio of d to a, the ratio of b2 to b1, and the water depth h.

[0092] In some embodiments, see 13a and Figure 13b For the guiding unit cell 10 of the first coupling configuration, its x-polarization P x With y-polarization P y All are 0, corresponding to the topologically trivial phase (P x P y ) = (0, 0); see also Figure 13c and Figure 13d For the guiding unit cell 10 of the second coupling configuration, its x-polarization P x With y-polarization Py Both are 1 / 2, corresponding to higher-order topological phases (P x P y ) = (1 / 2, 1 / 2); Please refer to Figure 13e and Figure 13f For a guiding unit cell 10 with a third coupling configuration, its x-polarization P x =0, y-polarization P y The value is 1 / 2, corresponding to the anisotropic topological phase (P) of the boundary state. x P y ) = (0, 1 / 2), and after geometric rotational symmetry, the anisotropic topological phase (P) of the corresponding boundary state can be obtained. x P y The coupled configuration is (1 / 2, 0). , , Let be the Bloch wave vector in the x-direction. Let y be the Bloch wave vector in the y direction. The Berry phase is in the x-direction. The Berry phase is in the y-direction. (x-coordinate) and Used only to represent normalized momentum coordinates.

[0093] Please see Figure 14a When the guiding unit cell 10 of the second coupling configuration is arranged around the guiding unit cell 10 of the first coupling configuration, the eigenstates of the water waves in the resulting structure include only the volume state; please refer to Figure 14b When the guiding unit cell 10 of the first coupling configuration is arranged around the guiding unit cell 10 of the third coupling configuration, the eigenstates of the water waves in the resulting structure include only volume states and edge states, excluding angular states. The edge state image is as follows: Figure 14c As shown, when the guiding unit cell 10 of the first coupling configuration is arranged around the guiding unit cell 10 of the second coupling configuration, the eigenstates of the water waves in the resulting structure include volume state, edge state and angular state.

[0094] Those skilled in the art can freely combine the guiding unit cells 10 of the first coupling configuration, the second coupling configuration, and the third coupling configuration according to actual needs, as long as the eigenstates of the water wave include the edge states.

[0095] Please see Figure 15In the third type of water wave guiding structure 100, an additional row and a column of solid water-blocking parts 101 can be added to the first type of water wave guiding structure 100, or an additional row and a column of solid water-blocking parts 101 can be removed from the first type of water wave guiding structure 100, thereby forming a second type of guiding region port 41. The first type of guiding region port 41 and the second type of guiding region port 41 have no substantial impact on the energy focusing effect of the guiding region 40, but only affect the distribution of water wave energy within the guiding region 40.

[0096] Please see Figure 16 When designing the water wave guiding structure 100, the following steps can be followed: Step S100: Determine the target frequency and structural parameters.

[0097] Based on the target operating frequency range, the operating water depth h, array period, size of the junction zone 11, and intracellular and intercellular coupling parameters are determined. The array period is determined by the size of the guiding unit cell 10. The intracellular coupling parameters mainly include the flow area and length of the intracellular coupling channel 12, and the intercellular coupling parameters mainly include the flow area and length of the intercellular coupling channel 13.

[0098] Step S200: Construct the water wave guiding structure 100.

[0099] Design a guiding unit cell 10 with intracellular and intercellular coupling, and splice the guiding unit cells 10 with the two coupling configurations to form a guiding region 40 and a corner enhancement region 50. Alternatively, two guiding unit cells 10 with different third coupling configurations can be spliced ​​to form a guiding region 40 and a corner enhancement region 50.

[0100] Step S300: Activate boundary guidance mode or corner enhancement mode.

[0101] Plane wave excitation or point wave excitation is applied to the water wave guiding structure 100 so that the excitation frequency is within the target operating frequency range, in order to excite the boundary guiding mode or the corner enhancement mode, and to verify whether the designed water wave guiding structure 100 meets the expectations.

[0102] This application also provides a water wave energy recovery system, including a water wave energy recovery device and a water wave guiding structure 100 in any of the above embodiments. The water wave energy recovery device is disposed in the intersection area 11 within the guiding area 40, preferably within the corner enhancement area 50, thereby improving the energy recovery efficiency of the water wave energy recovery device. The water wave energy recovery device can be a mechanical water wave energy recovery device such as an oscillating water column type or an oscillating float type, which drives a turbine or hydraulic pump to move through the undulation of water waves, thereby driving a generator to generate electricity, completing the conversion of wave energy into electrical energy.

[0103] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A water wave guiding structure, characterized in that, include: Multiple guiding cells, each guiding cell including a solid water-blocking part formed of impermeable material and at least two first water channels and at least two second water channels formed by the solid water-blocking part for guiding water waves. Each first water channel and each second water channel penetrates the guiding cell. The first water channels extend along the x-direction and are spaced apart along the y-direction. The second water channels extend along the y-direction and are spaced apart along the x-direction. The x-direction and the y-direction are perpendicular to each other. Each first water channel intersects with each second water channel. The intersection of each first water channel and each second water channel forms an intersection area. The sections of the first water channels and second water channels located between adjacent intersection areas constitute intracellular coupling water channels. The sections of the first water channels and second water channels located between the edge of the guiding cell and the intersection areas adjacent to the edge of the guiding cell constitute intercellular coupling water channels. The first topological domain is formed by the arrangement of the plurality of guiding primitive cells. Within the first topological domain, in the x-direction and / or the y-direction, the flow area of ​​the intracellular coupling channel is greater than the flow area of ​​the intercellular coupling channel. The second topological domain is formed by an array of multiple guiding cells that are different from the guiding cells in the first topological domain. In the second topological domain, the flow area of ​​the intracellular coupling channel is smaller than the flow area of ​​the intercellular coupling channel in the x-direction and / or the y-direction. The intercellular coupling channels of adjacent guiding primitive cells are aligned and connected to each other; The first and second topological domains are spliced ​​together, and the boundary region between the first and second topological domains constitutes a guiding region for guiding water waves and supporting the eigenstates of water waves, including edge states.

2. The water wave guiding structure as described in claim 1, characterized in that, The guiding region includes at least one corner, and the corner of the guiding region constitutes a corner enhancement region for supporting the eigenstates of water waves, including the angular state.

3. The water wave guiding structure as described in claim 2, characterized in that, At least one of the corners is a right angle.

4. The water wave guiding structure as described in any one of claims 1 to 3, characterized in that, The flow area of ​​the intracellular coupling channel in the first topological domain is equal to the flow area of ​​the intercellular coupling channel in the second topological domain. The flow area of ​​the intercellular coupling channel in the first topological domain is equal to the flow area of ​​the intracellular coupling channel in the second topological domain.

5. The water wave guiding structure as described in any one of claims 1 to 3, characterized in that, The cross-section of the guiding unit cell, which is parallel to the plane containing the x and y directions, is a square with a side length of a, and the cross-section of the intersection region, which is parallel to the plane containing the x and y directions, is a square with a side length of d.

6. The water wave guiding structure as described in claim 5, characterized in that, The frequency f and d of the water wave guided by the water wave guiding structure are positively correlated with the ratio of a.

7. The water wave guiding structure as described in claim 5, characterized in that, Both the intracellular coupling waterway and the intercellular coupling waterway are rectangular parallelepiped waterways. Within the first topological domain, on a cross-section parallel to the planes containing the x and y directions, the width of the intracellular coupling channel is b1, and the width of the intercellular coupling channel is b2. Within the second topological domain, on a cross-section parallel to the planes containing the x and y directions, the width of the intracellular coupling channel is b2, and the width of the intercellular coupling channel is b1. The frequency f of the water wave guided by the water wave guiding structure is positively correlated with the ratio of b2 to b1.

8. The water wave guiding structure as described in claim 7, characterized in that, 1.3≤d / b1≤1.7, 2≤b1 / b2≤4.

9. The water wave guiding structure as described in any one of claims 1 to 3, characterized in that, The distance between two adjacent first waterways is equal to the distance between two adjacent second waterways.

10. A water wave energy recovery system, comprising a water wave energy recovery device, characterized in that, It also includes the water wave guiding structure according to any one of claims 1 to 9, wherein the water wave energy recovery device is disposed in the confluence area of ​​the guiding area.

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