CN111321698A - An omnidirectional flow-making device in a wave-flow pool and its method - Google Patents

Abstract

The invention belongs to the technical fields of coastal, offshore and marine engineering, and relates to an omnidirectional flow-making device in a wave pool and a method thereof. . The flow-making device includes a wave flow pool, an equalizing area, an outflow (return) valve, a pressure gallery, and a controllable bidirectional axial flow pump. The water body is pumped into and out of the pressurized corridor by a two-way axial flow pump, and then enters the equalizing area through the open outflow valve, and then flows out from the outflow port into the wave flow pool to form the flow field required for the experiment; It enters the flow equalization area from the return port, flows back to the return pressure gallery through the open return valve, and then pumps out through the axial flow pump pipeline to form a circulating water flow. The device can superimpose waves in the wave pool, so that the experimental model can be used to study the interaction between waves and currents.

Description

An omnidirectional flow-making device in a wave-flow pool and its method

technical field

The invention relates to an omnidirectional flow-making device in a wave-current pool and a method thereof, belonging to the technical fields of coastal, offshore and marine engineering.

Background technique

The joint action of waves and currents on coastal, offshore and marine engineering structures is an important aspect of marine engineering design research, while the action of waves, currents and engineering structures is a complex nonlinear change process. For the problem of structure action, theoretical analysis and numerical simulation research are often difficult to meet the actual needs. Therefore, the establishment of experimental devices and experimental research methods to accurately simulate the real physical environment where waves and currents coexist is the basis and important means for carrying out related experimental research.

Related researches on hydrodynamics at the current stage (such as nonlinear load design research on ocean engineering structural systems by waves and currents, research on hydrodynamic problems of deep-water aquaculture cages, research on the migration law of pollutants in offshore areas, sea ice formation mechanism, ice The dynamic interaction between loads and buildings, the study of the action mechanism of marine environmental factors on the seabed soil, etc.) is realized in the wave flow pool that has been installed with the wave generator system, and the movable submersible pump set is used to assist in simulating the flow field. Interaction of waves with flow in different directions. The submersible pump used in this method is in the wave flow pool, which will inevitably have a disturbing effect on the transmission of waves; in addition, without the addition of the equalizing device, the uniformity of the flow field is difficult to meet the requirements for use. It will affect the wave transmission and bring a large error to the accuracy of the research results. There are also some flow-making pools, the outlet is built on the side walls of the four sides of the pool; or in the wave-flow pool, the outlet of the flow-making device is installed on the push plate. With such a method and device, when carrying out the relevant hydrodynamic experimental research described in this patent, there is an impeding effect of the wave pushing plate on the formation of the flow.

Therefore, it is very necessary to propose a method and device that can generate flow fields in all directions (that is, omnidirectional) in the wave flow pool, the flow velocity (or flow) is controllable, and meets the requirements of the interaction of waves and currents in hydrodynamic research. of.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide an omnidirectional flow-making device in a wave-flow pool and a method thereof, so as to meet the requirements of developing hydrodynamic wave-flow in the research fields of coastal, offshore and marine engineering technologies. Requirements for the use of experimental studies of physical models of interaction.

In order to achieve the above-mentioned purpose of the invention and solve the problems existing in the prior art, the technical scheme adopted in the present invention is: an omnidirectional flow-making method in a wave-flow pool, including a flow-making method for controlling the flow direction of the water flow and controlling the flow rate or flow rate of the water flow The flow creation method of the invention, the flow creation method for controlling the flow direction of water flow, includes the following content: since the flow field required for the experiment is generated in the wave flow pool, open N outflow valves in the flow field required for the experiment in the wave flow pool And the corresponding N return valves, close the M outflow valves and the corresponding M return valves outside the flow field required for the experiment to realize the selection of a certain flow field direction; specifically: the return flow in the flow field required for the experiment Enter the respective return flow equalization areas through the N return ports in the wave flow pool, and enter the "L"-shaped return pressure corridor through the open return valves connected to the N return flow equalization areas, and then pass through the computer-controlled bidirectional axis. The water flow is pumped into the "L"-shaped outflow pressure gallery, and then enters the respective outflow and flow-sharing areas through N open outflow valves. The outlet of the equalizing area flows out into the wave flow pool, forming a closed-loop water flow, and realizing the selection of the direction of the forward flow field; if the selection of the direction of the reverse flow field is realized, it can be realized by changing the steering of the two-way axial flow pump, and the above-mentioned backflow can be realized. It becomes an outflow, and the outflow becomes a return flow; specifically: the outflow port becomes a return port, the outflow equalization area becomes a return flow equalization area, the outflow valve becomes a return valve, and the outflow pressure corridor becomes The return pressure corridor, the return pressure corridor becomes the outflow pressure corridor, the return valve becomes the outflow valve, the return flow equalization area becomes the outflow equalization area, the return port becomes the outflow port, and the above is repeated. During the working process, a closed-loop water flow is formed, and the selection of the direction of the reverse flow field is realized; there are 2(M+N) outflow and return valves in the flow-making system, and 2(M+N) outflow and return flow equalization areas. 2(M+N) outflow and return ports, 2 "L"-shaped pressure corridors, M and N are both natural numbers;

The flow-making method for controlling the flow rate or flow rate of water flow includes the following contents: generating a control signal by controlling a computer to run a control program, controlling the output of a frequency converter through a control network, and adjusting the motor speed of the bidirectional axial flow pump to realize the control of the flow rate of the water flow. or flow control, so as to achieve the control of the flow velocity or flow rate of the flow field required by the experiment; in this control process, the use of the feedback mechanism refers to selecting the data measured by the flow meter as the feedback control quantity, participating in the flow velocity control, or selecting the flow rate The data measured by the meter is used as the feedback control quantity and participates in the flow control; the core of the computer operation control program is the control algorithm, and the output control value is described by formula (1),

u(n)=U(n)+Δu(n) (1)

In the formula, u(n) represents the output control value, U(n) represents the output control base value, which is calculated by linear interpolation between the given system final value U and the control time interval set by the user, and Δu(n) represents the output correction increase. Quantity, using incremental digital PID control expression, described by formula (2),

Δu(n)=K _p [e(n)-e(n-1)]+K _i e(n)+K _d [e(n)-2e(n-1)+e(n-2)] (2)

In the formula, e(n) represents the feedback value, that is, the measured value of the system flow rate or flow rate, K _p represents the proportional feedback coefficient, K _i represents the integral feedback coefficient, and K _d represents the differential feedback coefficient, where the initial value of the system u(0), e(0) is given by the measured value in the initial state of the system, K _p , K _i , and K _d are set by the system during debugging, according to different water depths and different flow field widths, and the flow velocity or flow rate is set in stages from small to large, and establish each According to the set water depth and flow field width, select the corresponding K _p , K _i , K _d from the expert library according to the water depth and flow field width. parameter.

The device in the method includes a wave flow pool, an "L"-shaped outflow pressure gallery, an "L"-shaped return pressure gallery, (M+N) outflow equalization areas, (M+N) A return flow equalization area, (M+N) outflow ports in the pool, (M+N) return ports in the pool, N open and M closed outflow valves, N open and M closed return flow Valves, valve corridors, multiple bidirectional axial flow pumps, multiple flow pump pipeline valves, multiple flow meters and flow meters, characterized in that: the wave flow pool is located on the uppermost layer of the entire device, and the "L" The outflow pressure corridor and the "L" type return pressure corridor are arranged in the lower part of the outer edge of the wave pool, and the 2 (M+N) outflow and return flow equalization areas are independent of each other. It is evenly distributed on the four sides of the lower layer of the wave flow pool. One end of each flow equalization area is open, that is, the outflow port and the return port are located on the bottom surface of the wave flow tank. Then, it is connected with the pressurized corridor to form (M+N) groups of outflow water channels and (M+N) groups of return water channels; the wave flow pool is connected to the "L"-shaped outflow pressurized corridor through the outflow water channel, and through the return water channel. The water channel is connected to the "L" type return pressure corridor, and the "L" type return pressure corridor is connected to the "L" type outlet pressure corridor through multiple groups of pump water channels, and the multiple groups of pump water channels are connected in turn through pipes. Two-way axial flow pump, flow meter and flow pump pipeline valve; the valve gallery is arranged on the outer edge of the wave flow pool and the upper part of the pressure gallery, and there is no water in it, which is used to install and operate outflow and return valves; The flow meter is set in the flow field required for the experiment in the wave flow pool during the experimental work, and is used for monitoring the water flow rate during the flow-making work.

The beneficial effects of the invention are as follows: an omnidirectional flow-making device in a wave-flow pool and its method have a wide range of application, its structural form is simple, the cross-sectional shape of each construction part is a rectangle, a regular polygon or a circular structure, the construction is easy, and it is suitable for It is used for wave flow pools with water depth from 0.2m to 3m; when the two "L"-shaped pressurized corridors are working, the interior is filled with water, and only connected to the connected equipment through pipes, and the interior is isolated from the outside atmosphere, so There is a water pressure greater than atmospheric pressure inside it, which can effectively ensure the balanced and stable outflow of the pressurized corridor; the control method of flow creation adopts expert experience-based PID control, which can simulate constant flow rate (or flow rate) A more accurate flow velocity (or flow) field can be obtained, which ensures the reliability of the experimental research results. In the wave pool, with the multi-directional wave generator system, the joint action of the wave and the flow field can be realized, which can meet the requirements for the use of physical model experiments in the hydrodynamic research in the field of ocean engineering technology design and research at this stage.

Description of drawings

FIG. 1 is a schematic diagram of the principle of the device of the present invention.

Fig. 2 is the flow chart of the control program of the present invention.

FIG. 3 is a schematic diagram of the plane layout of the device of the present invention.

Figure 4 is a schematic diagram of the cross section 1-1 of the device of the present invention.

Fig. 5 is a schematic diagram of the cross section 2-2 of the device of the present invention.

In the figure: 1. Wave pool, 2. Corridor with pressure, 2a, Corridor with pressure for outflow, 2b, Corridor with pressure for return flow, 3. Flow equalization area, 3a, Outflow equalization area, 3b, Return flow Flow equalization area, 4. Outflow and return port in the pool, 4a, Outlet port, 4b, Return port, 5. Valve gallery, 6. Two-way axial flow pump, 7. Outflow and return valve, 7a, Open Outflow valve, 7b, closed outflow valve, 7c, open return valve, 7d, closed return valve, 8, flow pump pipeline valve, 9, flow meter, 10, flow meter, 11, flow required for experiment field, 12, water flow direction.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, an omnidirectional flow-making device in a wave-flow pool includes a wave-flow pool 1, an "L"-shaped outflow pressure gallery 2a, an "L"-shaped return pressure gallery 2b, (M+ N) outflow equalization areas 3a, (M+N) return equalization areas 3b, (M+N) outflow ports 4a in the pool, (M+N) return ports 4b in the pool, N open And M closed outflow valves 7a, 7b, N open and M closed return valves 7c, 7d, valve gallery 5, multiple bidirectional axial flow pumps 6, multiple flow pump pipeline valves 8, multiple Flow meter 9 and flow meter 10. The wave pool 1 is located on the uppermost layer of the whole device, and the “L”-shaped outflow pressure gallery 2a and the “L”-shaped return pressure gallery 2b are arranged in the lower part of the outer edge of the wave pool 1 in a pair of buckles. , the total 2 (M+N) outflow and return flow equalization zones 3a, 3b are independent of each other, and are evenly distributed on the four sides of the lower layer of the wave flow pool 1. One end of each flow equalization zone is open, that is, the outflow port 4a, the return flow The port 4b is located on the bottom surface of the wave flow pool 1, and the other end of each flow equalization area is connected to the outflow and return valves 7 through pipes and then communicated with the pressurized gallery 2 to form (M+N) groups of outflow water channels and (M+N) groups. ) group of return water channels; the wave flow pool 1 is connected to the “L” type outlet pressure gallery 2a through the outlet water channel, and the “L” type return pressure gallery 2b is connected through the return water channel, and the “L” type return pressure channel The gallery 2b is connected with the "L"-shaped outlet pressure gallery 2a through multiple groups of pump water channels, and the multiple groups of pump water channels are sequentially connected to the bidirectional axial flow pump 6, the flow meter 9 and the flow pump pipeline valve 8 through pipes; The valve gallery 5 is arranged on the outer edge of the wave flow pool 1 and the upper part of the pressure gallery 2, and there is no water in it, and is used to install and operate the outflow and return valves 7; the flow meter 10 is set during the experimental work. In the flow field 11 required for the experiment in the wave flow pool 1, it is used to monitor the water flow rate during the flow-making operation. The wave flow pool 1 is an experimental area for the layout model to form waves and flow fields; first, the wave flow pool 1 and the bidirectional axial flow pump 6 used to drive the water flow are used as boundary points to distinguish the outflow from the backflow: in the experimental required flow In the watershed of field 11, a positive flow field is generated, as shown by the water flow direction 12, then the pressurized corridor 2 of the pumped water is called the outflow pressurized corridor 2a, and the N open valves connected to it are the outflow valves. 7a, and so on, the water flows through the N independent outflow equalization areas 3a, flows out from the N outflow ports 4a, enters the wave flow pool 1, forms the flow field 11 required for the experiment, and then flows back from the N outflow ports in turn. The port 4b flows into the N respective independent return flow equalization areas 3b, and the open return valve 7c connected to it, returns to the return pressure gallery 2b, and then flows into the two-way axial flow pump 6; when a reverse flow field is generated , that is, when the water flow direction 12 is in the opposite direction, the above-mentioned backflow becomes an outflow, and the outflow is changed to a backflow; a closed-loop circulating water flow is formed. 7b and 7d in the figure respectively represent M closed outflow valves and M closed return valves outside the flow area of the flow field 11 required for the experiment. As shown in Figure 3, in the wave flow pool 1, open the N outflow valves 7 and the opposite N return valves 7 in the flow field 11 required for the experiment, and close the 2M outside the flow field. Outflow and return valves 7; for forward and reverse flows in the same water area, it can be realized by changing the steering of the two-way axial flow pump 6; because the four sides of the wave flow pool 1 are evenly installed with outflow and return valves 7, through The opposite combination opens the required valve, closes the unused valve, and cooperates with the steering control of the two-way axial flow pump 6 to form a forward or reverse water flow in the flow field, and a laboratory with any flow direction can be formed in the wave flow pool 1. A flow field 11 is required to achieve omnidirectional flow.

As shown in Figure 2, the change of the flow velocity (or flow) in the flow field required by the experiment is realized by the control program according to this flow chart. First, the user gives the experimental water depth in the pool and the width of the flow field required for the experiment, and the desired flow velocity (or flow) value U (a positive value means forward flow, and a negative value means reverse flow); the program is based on the given Select the corresponding PID control parameters from the parameter expert database for the fixed water depth and flow field width, and calculate the output control base value U(n) according to the set flow rate (or flow) value U and the control time interval according to linear interpolation; After the initial feedback value e(0) is obtained, and the initial control value U(0) is output, the main loop is entered: the feedback value e(n) is collected, and the next output control value is calculated according to the aforementioned formulas (1) and (2). u(n), judge whether u(n) and U(n) are equal (actually judge whether u(n) is in [U(n-1)+U(n)]/2, and [U(n) +U(n+1)]/2), if they are not equal (not in this interval), and do not stop the flow, output u(n), if they are equal (in this interval), do not stop the flow , keep outputting the current value u(n-1), and then collect, calculate and judge again until the stop flow-making command is obtained.

As shown in Figures 3 to 5, a schematic diagram of the plane layout and a schematic cross-section of the device according to an embodiment of the present invention is given. (return) port 4, valve gallery 5, and also include two-way axial flow pump 6, outflow (return) valve 7, flow pump pipeline valve 8, flow meter 9, flow meter 10 and other equipment. In this embodiment, the wave flow pool 1 is 70m long, 50m wide, 3m deep, and has a maximum working water depth of 2m. It and the pressurized corridor 2 and the equalizing area 3 are all made of reinforced concrete, which has strong impermeability and resistance to Pressure capacity; bidirectional axial flow pump 6 with a diameter of 800mm, a single flow rate of 1.5m ³ /s, and a number of 6; outflow (return) valve 7 with a diameter of 600mm and a number of 94.

An omnidirectional flow-making method in a wave-flow pool, including a flow-making method for controlling the flow direction of the water flow and a flow-making method for controlling the flow rate or flow rate of the water flow, and the flow-making method for controlling the flow direction of the water flow includes the following content: The field is generated in the wave flow pool. Open the N outflow valves and the corresponding N return valves in the flow field required for the experiment in the wave flow pool, and close the M outflow valves and the corresponding N outflow valves outside the flow field required for the experiment. M return valves to realize the selection of a certain flow field direction; specifically: the return water flow in the flow field required by the experiment enters the respective return flow equalization area through the N return ports in the wave flow pool, and passes through the N return flow equalization areas. The open return valve connected to the flow area enters the "L"-shaped return pressure gallery, and then passes through the computer-controlled bidirectional axial flow pump, the water flow is pumped into the "L"-shaped outlet pressure gallery, and then passes through N open The outflow valves enter their respective outflow equalization areas. After steady flow and equalization, they flow out from the outflow ports of the N outflow equalization areas and enter the wave flow pool, forming a closed-loop water flow and realizing the normal flow in the direction of the forward flow field. Selection; if the selection of the direction of the reverse flow field is realized, it can be realized by changing the steering direction of the two-way axial flow pump, and the above-mentioned backflow will be turned into an outflow, and the outflow will become a backflow; specifically: the outflow port will become a return port, and the outflow will be changed. The flow equalization area becomes the return flow equalization area, the outflow valve becomes the return valve, the outflow pressure corridor becomes the return pressure corridor, the return pressure corridor becomes the outflow pressure corridor, and the return valve becomes The outflow valve, the return flow equalization area becomes the outflow equalization area, the return port becomes the outflow port, and the above working process is repeated to form a closed-loop water flow to realize the selection of the direction of the reverse flow field; a total of 2 ( M+N) outflow and return valves, 2 (M+N) outflow and return flow equalization areas, 2 (M+N) outflow and return ports, 2 "L"-shaped pressure corridors, Both M and N are natural numbers.

The flow-making method for controlling the flow rate or flow rate of water flow includes the following contents: generating a control signal by controlling a computer to run a control program, controlling the output of a frequency converter through a control network, and adjusting the motor speed of the bidirectional axial flow pump to realize the control of the flow rate of the water flow. or flow control, so as to achieve the control of the flow velocity or flow rate of the flow field required by the experiment; in this control process, the use of the feedback mechanism refers to selecting the data measured by the flow meter as the feedback control quantity, participating in the flow velocity control, or selecting the flow rate The data measured by the meter is used as the feedback control quantity and participates in the flow control; the core of the computer operation control program is the control algorithm, and the output control value is described by formula (1),

u(n)=U(n)+Δu(n) (1)

In the formula, u(n) represents the output control value, U(n) represents the output control base value, which is calculated by linear interpolation between the given system final value U and the control time interval set by the user, and Δu(n) represents the output correction increase. Quantity, using incremental digital PID control expression, described by formula (2),

Δu(n)=K _p [e(n)-e(n-1)]+K _i e(n)+K _d [e(n)-2e(n-1)+e(n-2)] (2)

In the formula, e(n) represents the feedback value, that is, the measured value of the system flow rate or flow rate, K _p represents the proportional feedback coefficient, K _i represents the integral feedback coefficient, and K _d represents the differential feedback coefficient, where the initial value of the system u(0), e(0) is given by the measured value in the initial state of the system, K _p , K _i , and K _d are set by the system during debugging, according to different water depths and different flow field widths, and the flow velocity or flow rate is set in stages from small to large, and establish each According to the set water depth and flow field width, select the corresponding K _p , K _i , K _d from the expert library according to the water depth and flow field width. parameter.

The advantages of the present invention are: (1) an omnidirectional flow field can be formed in the wave flow pool, (2) the double "L"-shaped pressurized corridors can effectively ensure the outflow balance and stability, (3) the computer program automatically The controlled flow-making system can simulate a constant flow velocity (or flow) field, and can also simulate a continuously changing flow velocity (or flow) field. The set velocity (or flow) value is a value that can be changed according to a certain time interval (not a control time interval), such as simulating a tidal current near the coast, whose velocity (or flow) and flow direction change with time. Therefore, this control method can not only realize the automatic control of the change of the flow rate (or flow rate), but also realize the automatic control of the change of the flow direction (forward to reverse) in a flow-making process. (4) Expert experience The application of the PID control algorithm can make the simulation of the flow field more accurate and stable.

Claims (2)

1. an omnidirectional flow-making method in a wave flow pool, comprising the flow-making method of controlling the flow direction of water flow and the flow-making method of controlling the flow rate of water flow or flow, it is characterized in that: the flow-making method of the described control water flow direction, comprises the following content : Since the flow field required for the experiment is generated in the wave flow tank, open the N outflow valves and the corresponding N return valves in the flow field required for the experiment in the wave flow tank, and close the M outside the flow field required for the experiment. The outflow valve and the corresponding M return valves can realize the selection of a certain flow field direction; specifically: the return water flow in the flow field required by the experiment enters the respective return flow equalization area through the N return ports in the wave flow pool, and passes through The open return valves connected to the N return flow equalization areas enter the "L"-shaped return pressure gallery, and then pass through the computer-controlled two-way axial flow pump, and the water flow is pumped into the "L"-shaped outlet pressure gallery. Then, it enters the respective outflow and flow-sharing areas through N open outflow valves. After steady flow and flow-sharing, it flows out from the outflow ports of the N outflow and flow-sharing areas into the wave flow pool, forming a closed-loop water flow to achieve The selection of the direction of the forward flow field; if the selection of the direction of the reverse flow field is realized, it can be realized by changing the steering of the two-way axial flow pump, and the above-mentioned backflow will be turned into an outflow, and the outflow will become a backflow; It is the return port, the outflow equalization area becomes the return flow equalization area, the outflow valve becomes the return valve, the outflow pressure corridor becomes the return pressure corridor, and the return pressure corridor becomes the outflow pressure corridor. The return valve becomes the outflow valve, the return flow equalization area becomes the outflow equalization area, the return port becomes the outflow port, and the above working process is repeated to form a closed-loop water flow and realize the selection of the direction of the reverse flow field; The system is equipped with 2(M+N) outflow and return valves, 2(M+N) outflow and return flow equalization areas, 2(M+N) outflow and return ports, and 2 "L" type pressure corridor, M and N are both natural numbers; The flow-making method for controlling the flow rate or flow rate of water flow includes the following contents: generating a control signal by controlling a computer to run a control program, controlling the output of a frequency converter through a control network, and adjusting the motor speed of the bidirectional axial flow pump to realize the control of the flow rate of the water flow. or flow control, so as to achieve the control of the flow velocity or flow rate of the flow field required by the experiment; in this control process, the use of the feedback mechanism refers to selecting the data measured by the flow meter as the feedback control quantity, participating in the flow velocity control, or selecting the flow rate The data measured by the meter is used as the feedback control quantity and participates in the flow control; the core of the computer operation control program is the control algorithm, and the output control value is described by formula (1), u(n)=U(n)+Δu(n) (1) In the formula, u(n) represents the output control value, U(n) represents the output control base value, which is calculated by linear interpolation between the given system final value U and the control time interval set by the user, and Δu(n) represents the output correction increase. Quantity, using incremental digital PID control expression, described by formula (2), Δu(n)=K _p [e(n)-e(n-1)]+K _i e(n)+K _d [e(n)-2e(n-1)+e(n-2)] (2) In the formula, e(n) represents the feedback value, that is, the measured value of the system flow rate or flow rate, K _p represents the proportional feedback coefficient, K _i represents the integral feedback coefficient, and K _d represents the differential feedback coefficient, where the initial value of the system u(0), e(0) is given by the measured value in the initial state of the system, K _p , K _i , and K _d are set by the system during debugging, according to different water depths and different flow field widths, and the flow velocity or flow rate is set in stages from small to large, and establish each According to the set water depth and flow field width, select the corresponding K _p , K _i , K _d from the expert library according to the water depth and flow field width. parameter. 2. The device in the method according to claim 1, comprising a wave flow pool, an "L"-shaped outflow pressured gallery, an "L"-shaped backflow pressured gallery, and (M+N) outflow equalization areas , (M+N) return flow equalization areas, (M+N) outflow ports in the pool, (M+N) return ports in the pool, N open and M closed outflow valves, N open And M closed return valves, valve corridors, multiple bidirectional axial flow pumps, multiple flow pump pipeline valves, multiple flow meters and flow meters, characterized in that: the wave flow pool is located on the uppermost layer of the entire set of devices , the "L" type outflow pressure corridor and the "L" type return pressure corridor are arranged in the lower part of the outer edge of the wave flow pool, and there are 2 (M+N) outflow and return channels in total. The equalizing areas are independent of each other and are evenly distributed on the four sides of the lower layer of the wave flow pool. One end of each equalizing area is open, that is, the outflow port and the return port are located on the bottom surface of the wave flow tank. That is, the outflow and return valves are connected to the pressurized corridor to form (M+N) outflow water channels and (M+N) return water channels; the wave flow pool is connected to the "L" type outflow channel through the outflow water channel. The pressure corridor is connected to the "L" type return pressure corridor through the return water channel. The "L" type return pressure corridor is connected to the "L" type outlet pressure corridor through multiple sets of pump water channels. The water channel is connected to the two-way axial flow pump, the flow meter and the pipeline valve of the flow pump in turn through the pipeline; the valve gallery is arranged on the outer edge of the wave flow pool and the upper part of the pressure gallery, and there is no water in it, which is used for installation and operation. Outflow and return valves; The flow meter is set in the flow field required for the experiment in the wave flow pool during the experimental work, and is used for monitoring the water flow rate during the flow-making work.

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