Deep water two-way current generating system

Abstract

The application discloses a deep-water bidirectional flow generating system, and relates to the technical field of pool flow field simulation, which comprises a pool body and a bidirectional flow generating device; the bidirectional flow generating device comprises a plurality of bidirectional flow generating assemblies which are stacked along the depth direction of the pool body; the bidirectional flow generating assembly comprises a plurality of circulating pipes; the plurality of circulating pipes are arranged in an array in a same horizontal plane perpendicular to the depth direction; each circulating pipe is connected with the pool body to form a circulating pipe circuit; each circulating pipe is provided with a bidirectional water pump; and each circulating pipe is provided with a turning flow guide structure at a corner position. The design effectively avoids the problems of uneven flow field distribution and small effective area in the traditional mode, and ensures the same quality of flow fields in two directions in bidirectional flow generation. Moreover, the turning flow guide structure is used for guiding flow at the corner position, and the problem of great energy loss caused by the pressure perforated wall in the traditional mode is solved.

Description

Technical Field

[0001] This application relates to the field of water pool flow field simulation technology, and in particular to a deep-water bidirectional flow generation system. Background Technology

[0002] In marine engineering, deep-sea structures are typically situated in complex sea conditions under the coupled influence of multiple physical fields, including waves, currents, and wind. The design and research of deep-sea structures heavily rely on physical model experiments. Wave-current pools are indispensable and crucial equipment for experimentally simulating the interaction between the wave-current environment and deep-sea engineering structures. Waves are generated by wave generators installed on the surface of the pool, operating periodically. Water flow is formed by the circulating motion of water driven by a circulating pump system. Compared to shallow-water flow generation, deep-water flow generation involves a significantly larger water volume, requiring a substantial increase in energy. Controlling the velocity distribution of the circulating system under high flow rates is more challenging. Furthermore, to simulate the actual deep-sea current environment, the system must also be able to simulate vertically non-uniform velocity profiles, further increasing the difficulty of precisely controlling the flow field in deep-water flow generation systems.

[0003] Current flow generation schemes are divided into three types: horizontal circulation within the pool, vertical circulation within the pool, and external circulation and vertical stratification. Among them, the external circulation and vertical stratification scheme is considered the most advanced flow generation scheme because it can effectively eliminate disturbances by arranging rectification facilities in the external circulation area of ​​the pool.

[0004] In external circulation design, to meet the external circulation requirements of deep-water experimental pools, corridors are typically constructed on the sides of the pool, and the pool is vertically divided into multiple layers, each circulating water independently. In this design, the circulating water needs to make a 180° turn before entering the pool. To ensure a uniform velocity distribution across the pool's width, a combination of conical flow channels and pressure-perforated walls is currently employed: the water first undergoes a partial turn guided by the inclined surface of the conical flow channel, and the contraction characteristics of the conical structure gradually reduce the flow rate while maintaining a uniform pressure distribution within the channel. Subsequently, under pressure, the water passes through the pressure-perforated walls, completing a 90° turn.

[0005] However, in this scheme, when high-speed fluid passes through the small openings in the pressure perforated wall, the turbulence and friction cause significant energy loss, greatly increasing the required power of the flow-generating pump and raising daily operating costs. Furthermore, at the inlet of the pool, the velocity direction of the water entering the conical channel forms a 90° angle with the mainstream direction of the pool. The inertia of the fluid causes the water to tend to accumulate at the tail end of the conical channel, resulting in uneven velocity distribution across the pool cross-section. Simultaneously, at the return outlet, the presence of the conical channel increases local resistance at the tail end, causing the water to deflect towards the conical channel inlet in the rear of the pool, creating a noticeable oblique flow phenomenon. To improve these two flow field inhomogeneities, the required pressure perforated wall arrangements for the inlet and return outlet differ, making it difficult to guarantee good flow field quality in both directions using a scheme where the conical channel and pressure perforated wall work synergistically. Summary of the Invention

[0006] In view of this, the purpose of this application is to abandon the traditional pressure perforated wall scheme and provide a new deep-water bidirectional flow generation system to solve the technical shortcomings of existing flow generation schemes that cannot guarantee good flow field quality in both directions.

[0007] To achieve the above technical objectives, this application provides a deep-water bidirectional flow generation system, including a pool body and a bidirectional flow generation device;

[0008] The bidirectional flow-generating device includes multiple bidirectional flow-generating components stacked along the depth direction of the pool body.

[0009] The bidirectional flow generation component includes multiple circulation pipes;

[0010] Multiple circulation tubes are arranged in an array in the same horizontal plane perpendicular to the depth direction;

[0011] Each of the aforementioned circulation pipes is connected to the water tank body to form a circulation pipeline;

[0012] Each of the aforementioned circulation pipes is equipped with a bidirectional water pump;

[0013] Each of the aforementioned circulation pipes is equipped with a deflector structure at the corner position.

[0014] Furthermore, the steering and guiding structure includes multiple guiding elements;

[0015] Multiple flow guides are arranged in an array, and flow guide gaps are formed between adjacent flow guides.

[0016] Furthermore, the circulation pipe includes a first pipe body and a second pipe body;

[0017] One end of the first pipe is connected to the first side wall of the pool body;

[0018] One end of the second pipe is connected to a second sidewall on the main body of the pool, which is opposite to the first sidewall;

[0019] The bidirectional water pump is connected between the other end of the first pipe and the other end of the second pipe.

[0020] Furthermore, the diameter of the first tube gradually increases from one end to the other;

[0021] The diameter of the second tube gradually increases from one end to the other.

[0022] Furthermore, both the first tube and the second tube include multiple DC tube segments connected in sequence;

[0023] The adjacent DC pipe segments are connected at an angle, such that the connection position between the adjacent DC pipe segments forms the corner position.

[0024] Furthermore, the diameters of the DC pipe segments in the first pipe body and the second pipe body are different, and they gradually increase towards the water tank body.

[0025] Furthermore, the bidirectional flow-generating assembly also includes a mixing chamber;

[0026] The other end of each of the first tubes and the other end of each of the second tubes are connected to the mixing chamber.

[0027] Furthermore, the bidirectional water pump is installed between the other end of the first pipe and the mixing chamber.

[0028] Furthermore, the bidirectional water pump is installed between the other end of the second pipe and the mixing chamber.

[0029] Furthermore, the number of the bidirectional flow-generating components is six;

[0030] Each of the bidirectional flow-generating components includes three circulation pipes.

[0031] As can be seen from the above technical solutions, the deep-water bidirectional flow generation system designed in this application has the following beneficial effects:

[0032] 1. The entire water tank body is designed with depth (vertical direction) layering. Each horizontal layer is equipped with a bidirectional flow-generating component for flow generation. Each horizontal layer's bidirectional flow-generating component consists of multiple independently controllable circulation pipes. Each circulation pipe can independently complete the bidirectional flow generation of its responsible area, realizing the division of the horizontal layer into multiple (flow field width direction) regions for independent control and simulation. This design effectively avoids the problems of uneven flow field distribution and small effective area in traditional methods, and can ensure the same quality of flow field in both directions in bidirectional flow generation.

[0033] 2. By using a diversion and flow guiding structure to guide the flow at corner positions, the problem of huge energy loss caused by pressure perforated walls in traditional methods is solved. This can effectively reduce the head and power requirements of the bidirectional water pump and significantly save on operating costs.

[0034] 3. The overall design is simple and easy to install, which greatly reduces construction costs. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a cross-sectional view of a deep-water bidirectional flow generation system provided in this application;

[0037] Figure 2 A perspective view of a deep-water bidirectional flow generation system provided in this application;

[0038] In the diagram: 100, Water tank body; 101, First inlet / outlet; 102, Second inlet / outlet; 200, Bidirectional flow generation component; 201, First pipe body; 202, Second pipe body; 203, Bidirectional water pump; 204, Mixing chamber; 205, Direct current pipe section; 206, Circulation pipe; 300, Directional flow guiding structure; 301, Flow guiding component. Detailed Implementation

[0039] The technical solutions of 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 the embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of this application.

[0040] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "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 this application 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 this application. 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.

[0041] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0042] This application discloses a deep-water bidirectional flow generation system.

[0043] Please see Figure 1 One embodiment of a deep-water bidirectional flow generation system provided in this application includes:

[0044] The water tank body 100 and the bidirectional flow generation device.

[0045] The pool body 100 is located on the ground. Taking a rectangular design as an example, the pool body 100 is enclosed by four concrete side walls and a base plate, but there are no specific restrictions.

[0046] The bidirectional flow generation device includes multiple bidirectional flow generation components 200 stacked along the depth direction of the pool body 100.

[0047] The bidirectional flow generation component 200 includes multiple circulation pipes 206; the multiple circulation pipes 206 are arranged in an array in the same horizontal plane perpendicular to the depth direction; each circulation pipe 206 is connected to the inlet and outlet of the water tank body 100 to form circulation pipe 206 paths.

[0048] Each circulation pipe 206 is equipped with a bidirectional water pump 203, and each circulation pipe 206 is equipped with a diverting flow guiding structure 300 at the corner position.

[0049] The deep-water bidirectional flow generation system designed in this application has the following beneficial effects:

[0050] 1. The entire water tank body 100 is designed with depth (vertical direction) layering. Each horizontal layer is equipped with a bidirectional flow-generating component 200 for flow generation. Each horizontal layer's bidirectional flow-generating component 200 consists of multiple independently controllable circulation pipes. Each circulation pipe can independently complete the bidirectional flow generation of its responsible area, realizing the division of the horizontal layer into multiple (flow field width direction) regions for independent control simulation. This design effectively avoids the problems of uneven flow field distribution and small effective area in traditional methods, and can ensure the same quality of the flow field in both directions in bidirectional flow generation.

[0051] 2. By using the diversion and flow guiding structure 300 to guide the flow at the corner, the problem of huge energy loss caused by the pressure perforated wall in the traditional method is solved. This can effectively reduce the head and power requirements of the bidirectional water pump 203 and significantly save on operating costs.

[0052] 3. The overall design is simple and easy to install, which greatly reduces construction costs.

[0053] The above is Embodiment 1 of a deep-water bidirectional flow generation system provided in this application. The following is Embodiment 2 of a deep-water bidirectional flow generation system provided in this application. Please refer to the following for details. Figures 1 to 2 .

[0054] Based on the solution of Embodiment 1 above:

[0055] Furthermore, the steering and guiding structure 300 includes a plurality of guiding elements 301; the plurality of guiding elements 301 are arranged in an array, and a guiding gap is formed between adjacent guiding elements 301.

[0056] When fluid flows through the guide gap, it is guided by the guide element 301, thereby changing the flow direction and achieving the function of diversion and guidance. The array arrangement of multiple guide elements 301 makes the fluid more stable during the diversion process, reducing the generation of turbulence and vortices.

[0057] Since the flow guides 301 are independently set and arranged in an array, if one of the flow guides 301 is damaged or worn, only that flow guide 301 needs to be replaced. There is no need to disassemble and replace the entire steering flow guide structure 300 on a large scale, thereby reducing maintenance costs and time.

[0058] The shape and arrangement of the flow guide 301 can be determined through numerical simulation studies to minimize the energy loss of fluid flowing through the component. It should be noted that the calculation of shape and arrangement through numerical simulation in fluid mechanics is an existing technology, which will not be elaborated here.

[0059] Furthermore, the design of the circulation pipe 206 includes a first pipe body 201 and a second pipe body 202. One end of the first pipe body 201 is connected to the first side wall of the water tank body 100; one end of the second pipe body 202 is connected to a second side wall on the water tank body 100 opposite to the first side wall. Taking the water tank body 100 as a rectangular pool design as an example, the first side wall can refer to one side wall surface along the length direction of the water tank body 100, while the second side wall refers to the other side wall surface along the length direction of the water tank body 100. The first side wall is provided with a first inlet / outlet 101 for the first pipe body 201 to connect to, and similarly, the second side wall is provided with a second inlet / outlet 102 for each of the second pipe bodies 202 to connect to. The above design realizes zoned flow control of the water tank body 100 in the depth direction and zoned flow control in the width direction.

[0060] The bidirectional water pump 203 is connected between the other end of the first pipe body 201 and the other end of the second pipe body 202.

[0061] Furthermore, the diameter of the first pipe body 201 gradually increases from one end to the other; the diameter of the second pipe body 202 gradually increases from one end to the other.

[0062] From a fluid dynamics perspective, when fluid flows from the end with a smaller diameter to the end with a larger diameter, the fluid velocity gradually decreases while the pressure increases accordingly. In this deep-water bidirectional flow generation system, this design allows the fluid to diffuse evenly into the pool at a lower velocity and higher pressure upon entering the pool body 100, thereby avoiding localized flow turbulence caused by excessively high velocity and further improving the uniformity of the flow field.

[0063] Furthermore, both the first tube body 201 and the second tube body 202 include multiple DC tube segments 205 connected in sequence; adjacent DC tube segments 205 are connected at an angle so that the connection position between adjacent DC tube segments 205 forms a corner position.

[0064] In practical applications, the number, length, and angle of the DC pipe section 205 can be flexibly adjusted according to the specific size, shape, and flow requirements of the water tank, without any specific restrictions.

[0065] Furthermore, taking the design of multiple DC pipe segments 205 in both the first pipe body 201 and the second pipe body 202 as an example, in order to achieve the design of gradually increasing pipe diameter in the first pipe body 201 and the second pipe body 202, the pipe diameter design of each DC pipe segment 205 in the first pipe body 201 and the second pipe body 202 is different, and gradually increases towards the water tank body 100.

[0066] Taking the example that both the first pipe body 201 and the second pipe body 202 include three DC pipe segments 205, the three DC pipes have three different pipe diameters, and the pipe diameter of the DC pipe segment 205 that is closer to the water tank body 100 is larger.

[0067] Furthermore, the bidirectional flow generation component 200 also includes a mixing chamber 204, through which each circulation pipe 206 is connected.

[0068] Specifically, the other end of each first tube 201 and the other end of each second tube 202 are connected to the mixing chamber 204.

[0069] The presence of the mixing chamber 204 allows for the adjustment of the flow rate of one or more bidirectional pumps 203 while also partially influencing other bidirectional pumps 203 on the same level. This avoids the situation where adjusting one bidirectional pump 203 would have an excessive impact on the water tank body 100 when each circulation pipe 206 is independent, thus facilitating the flow rate connection between each horizontal zone and improving the uniformity within the water tank body 100.

[0070] Furthermore, taking the design of a mixing chamber 204 as an example, one or two bidirectional water pumps 203 can be configured on each circulation pipe 206. Specifically, a bidirectional water pump 203 is installed between the other end of the first pipe body 201 and the mixing chamber 204, and / or a bidirectional water pump 203 is installed between the other end of the second pipe body 202 and the mixing chamber 204.

[0071] Taking the first pipe 201 as the inlet pipe and the second pipe 202 as the outlet pipe as an example, the water in the pool body 100 flows out through the second pipe 202 and is mixed in the mixing chamber 204, then flows back to the pool body 100 through the first pipe 201. If the first pipe 201 is the outlet pipe and the second pipe 202 is the inlet pipe as an example, the water in the pool body 100 flows out through the first pipe 201 and is mixed in the mixing chamber 204, then flows back to the pool body 100 through the second pipe 202, forming a stable flow field in the pool body 100 and achieving bidirectional flow generation.

[0072] Furthermore, the number of bidirectional flow-generating components 200 and the number of circulation pipes 206 included in the bidirectional flow-generating components 200 can be varied according to actual needs. Figure 1 as well as Figure 2 This is a schematic diagram of one implementation method. Specifically, there are six bidirectional flow-generating components 200; each bidirectional flow-generating component 200 includes three circulation pipes 206. This divides the main body of the pool into six horizontal layers in the depth direction (vertical direction), and each horizontal layer is divided into three parts in the width direction. The water in each part is propelled by different circulation pipes and connected through a mixing zone.

[0073] The thickness of each layer of the bidirectional flow-generating component 200 can be varied according to the requirements of the flow field in the water tank body 100, without any restrictions.

[0074] The above provides a detailed description of a deep-water bidirectional flow generation system provided in this application. For those skilled in the art, based on the ideas of the embodiments of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A deep-water bidirectional flow generation system, characterized in that, Includes the main body of the water tank (100) and a two-way flow generation device; The bidirectional flow-generating device includes a plurality of bidirectional flow-generating components (200) stacked along the depth direction of the pool body (100). The bidirectional flow-generating assembly (200) includes multiple circulation pipes (206); The plurality of the circulation tubes (206) are arranged in an array in the same horizontal plane perpendicular to the depth direction; Each of the aforementioned circulation pipes (206) is connected to the water tank body (100) to form a circulation pipeline; Each of the aforementioned circulation pipes (206) is equipped with a bidirectional water pump (203); Each of the aforementioned circulation pipes (206) is equipped with a deflecting and guiding structure (300) at the corner position. The circulation pipe (206) includes a first pipe body (201) and a second pipe body (202); One end of the first pipe (201) is connected to the first side wall of the pool body (100); One end of the second pipe (202) is connected to a second sidewall on the pool body (100) that is opposite to the first sidewall; The bidirectional water pump (203) is connected between the other end of the first pipe body (201) and the other end of the second pipe body (202); The diameter of the first tube (201) gradually increases from one end to the other. The diameter of the second tube (202) gradually increases from one end to the other; The bidirectional flow-generating assembly (200) also includes a mixing chamber (204); The other end of each of the first tubes (201) and the other end of each of the second tubes (202) are connected to the mixing chamber (204).

2. The deep-water bidirectional flow generation system according to claim 1, characterized in that, The steering and guiding structure (300) includes a plurality of guiding elements (301); Multiple flow guides (301) are arranged in an array, and flow guide gaps are formed between adjacent flow guides (301).

3. The deep-water bidirectional flow generation system according to claim 1, characterized in that, Both the first tube body (201) and the second tube body (202) include multiple DC tube segments (205) connected in sequence. The adjacent DC pipe segments (205) are connected at an angle, such that the connection position between the adjacent DC pipe segments (205) forms the corner position.

4. A deep-water bidirectional flow generation system according to claim 3, characterized in that, The diameters of the first pipe body (201) and each of the DC pipe segments (205) in the second pipe body (202) are different, and they gradually increase in the direction of approaching the water tank body (100).

5. A deep-water bidirectional flow generation system according to claim 1, characterized in that, The bidirectional water pump (203) is installed between the other end of the first pipe (201) and the mixing chamber (204).

6. A deep-water bidirectional flow generation system according to claim 1, characterized in that, The bidirectional water pump (203) is installed between the other end of the second pipe (202) and the mixing chamber (204).

7. A deep-water bidirectional flow generation system according to claim 1, characterized in that, The number of bidirectional flow-generating components (200) is 6; Each of the bidirectional flow-generating components (200) includes three circulation pipes (206).

Images