Simulation system and classification method for open-channel turbulence with submerged vegetation

Abstract

The present invention discloses a simulation system and classification method for turbulent flow in an open channel containing submerged vegetation, and relates to the technical field of ecohydraulics. The simulation system comprises: a test chamber, a water tank, a vegetation simulation component, and a measuring and processing device; wherein: the vegetation simulation component is installed in the test chamber; the water tank is installed at one end of the test chamber with a water inlet, and is used to supply water to the vegetation simulation component in the test chamber; the measuring and processing device is installed above the test chamber, and is used to measure the vegetation submergence corresponding to each part of the vegetation simulation component in the test chamber, and divide the spatial distribution of turbulent flow types according to the relationship between the vegetation submergence and the vegetation density. The above-mentioned simulation system for turbulent flow in an open channel containing submerged vegetation will not cause a certain potential error between the model calculation results and the actual situation, and can ensure the accuracy of the classification of the spatial distribution of turbulent flow types.

Description

Technical Field

[0001] The present invention relates to the technical field of eco - hydraulics, and particularly to a simulation system and classification method for open - channel turbulent flow with submerged vegetation. Background Art

[0002] Submerged vegetation widely exists in natural rivers, changing the turbulent flow structure of the river channel, and thus affecting flood routing, mass transport, energy dissipation, etc. The turbulent flow movement in an open channel with submerged vegetation shows variation characteristics in the water - depth direction and is affected by the arrangement density and relative submergence degree of the vegetation.

[0003] Currently, numerical simulation methods are generally used for turbulent flow research: numerical simulation mainly obtains the temporal and spatial distributions of the flow by approximately solving the Navier - Stokes equations. The numerical simulation method involves approximations of some parameters (such as the turbulent stress term), resulting in certain potential errors between the model calculation results and the actual situation. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a simulation system and classification method for open - channel turbulent flow with submerged vegetation, aiming to solve the problem that the existing numerical simulation method for turbulent flow research leads to certain potential errors between the model calculation results and the actual situation.

[0005] According to a first aspect, an embodiment of the present invention provides a simulation system for open - channel turbulent flow with submerged vegetation. The simulation system includes: a test cavity, a water tank, a vegetation simulation component, and a measurement and processing device; wherein:

[0006] The vegetation simulation component is installed in the test cavity;

[0007] The water tank is installed at one end of the test cavity with a water inlet, and is used to supply water to the vegetation simulation component in the test cavity;

[0008] The measurement and processing device is installed above the test cavity, and is used to measure the vegetation submergence degrees corresponding to various locations of the vegetation simulation component in the test cavity, and divide the spatial distribution of the turbulent flow types according to the relationship between the vegetation submergence degree and the vegetation density.

[0009] The simulation system of open-channel turbulent flow with submerged vegetation provided by the embodiments of the present invention includes: a test cavity, a water tank, a vegetation simulation component, and a measurement and processing device; the vegetation simulation component is installed in the test cavity, and the water tank is installed at one end of the test cavity with a water inlet for supplying water to the vegetation simulation component in the test cavity, so that the water flow can form open-channel turbulent flow with submerged vegetation after passing through the vegetation simulation component. Then, the measurement and processing device is installed above the test cavity for measuring the vegetation submergence degree corresponding to each part of the vegetation simulation component in the test cavity, and dividing the spatial distribution of the turbulent flow type according to the relationship between the vegetation submergence degree and the vegetation density. The above simulation system of open-channel turbulent flow with submerged vegetation does not need to approximately solve the Navier-Stokes equation to obtain the temporal and spatial distribution of the flow. Therefore, there is no need to approximately solve the data, and thus there will be no certain potential error between the model calculation result and the actual situation. The above simulation system of open-channel turbulent flow with submerged vegetation realizes the research on turbulent flow by simulating the open-channel turbulent flow, thereby ensuring the accuracy of dividing the spatial distribution of the turbulent flow type.

[0010] Combined with the first aspect, in the first embodiment of the first aspect, the simulation system further includes: a return water tank, which is installed at one end of the test cavity with a water outlet and is communicated with the water outlet, and the return water tank is used for holding the water flowing out from the water outlet.

[0011] The simulation system of open-channel turbulent flow with submerged vegetation provided by the embodiments of the present invention further includes: a return water tank, which is installed at one end of the test cavity with a water outlet and is communicated with the water outlet, and the return water tank is used for holding the water flowing out from the water outlet, thereby realizing the self-circulation of the water body, saving water resources, reducing the procedure of manual water addition, saving manpower, and improving efficiency.

[0012] Combined with the first embodiment of the first aspect, in the second embodiment of the first aspect, the simulation system includes: a water pump, a water inlet pipe, and a water extraction pipe. One end of the water pump is connected to the water inlet pipe, and the other end is connected to the water extraction pipe; the other end of the water extraction pipe extends into the return water tank, and the other end of the water inlet pipe extends into the water tank;

[0013] The water pump is used for pumping the water in the return water tank into the water tank.

[0014] The simulation system of open-channel turbulent flow with submerged vegetation provided by the embodiments of the present invention further includes a water pump, a water inlet pipe, and a water extraction pipe. One end of the water pump is connected to the water inlet pipe, and the other end is connected to the water extraction pipe; the other end of the water extraction pipe extends into the return water tank, and the other end of the water inlet pipe extends into the water tank; the water pump is used for pumping the water in the return water tank into the water tank. The simulation system of open-channel turbulent flow with submerged vegetation realizes pumping the water in the return water tank back into the water tank through the water pump, the water inlet pipe, and the water extraction pipe, thereby realizing the self-circulation of the water body, saving water resources, reducing the procedure of manual water addition, saving manpower, and improving efficiency.

[0015] Combined with the second embodiment of the first aspect, in the third embodiment of the first aspect, a filter screen is installed vertically in front of the end of the water suction pipe extending into the return pool in a direction perpendicular to the water flow direction;

[0016] The filter screen is used to filter the water pumped into the water pump.

[0017] In the simulation system of open-channel turbulence with submerged vegetation provided by the embodiments of the present invention, a filter screen is installed vertically in front of the end of the water suction pipe extending into the return pool in a direction perpendicular to the water flow direction; the filter screen is used to filter the water pumped into the water pump and filter out impurities in the water, avoiding impurities from entering the water pump and affecting the normal use of the water pump or causing damage to the water pump.

[0018] Combined with the first aspect, in the fourth embodiment of the first aspect, the vegetation simulation component includes: a first bottom plate, a second bottom plate, simulated vegetation, a first support member, and a second support member; where:

[0019] The upper surfaces of the first support member and the second support member are connected to the bottom surface of the first bottom plate, and the lower surfaces are respectively connected to the inner bottom surface of the test cavity, for supporting the first bottom plate;

[0020] The first bottom plate is installed in the test cavity and is used to cooperate with the test cavity to form a water tank;

[0021] The second bottom plate is installed on the upper surface of the first bottom plate and is used to simulate the river bottom and fix the simulated vegetation.

[0022] In the simulation system of open-channel turbulence with submerged vegetation provided by the embodiments of the present invention, the vegetation simulation component includes: a first bottom plate, a second bottom plate, simulated vegetation, a first support member, and a second support member; where: the upper surfaces of the first support member and the second support member are connected to the bottom surface of the first bottom plate, and the lower surfaces are respectively connected to the inner bottom surface of the test cavity, for supporting the first bottom plate; the first bottom plate is installed in the test cavity and is used to cooperate with the test cavity to form a water tank so that water flow can circulate and be stored in the water tank, and the second bottom plate is installed on the upper surface of the first bottom plate and is used to simulate the river bottom and fix the simulated vegetation, and to reduce the resistance on the riverbed surface to a certain extent, so as not to affect the water flow movement, thereby reducing the difference between the turbulence in the test cavity and the natural turbulence, ensuring the accuracy of the turbulence simulated by the simulation system based on open-channel turbulence with submerged vegetation, and further ensuring the accuracy of dividing the spatial distribution of the turbulence type.

[0023] Combined with the fourth embodiment of the first aspect, in the fifth embodiment of the first aspect, the first support member is installed upstream according to the water flow direction, the second support member is installed downstream according to the water flow direction, and the second support member is a telescopic member for adjusting the slope of the first bottom plate.

[0024] The simulation system of open-channel turbulence with submerged vegetation provided by the embodiment of the present invention. The first support member is installed upstream according to the water flow direction, and the second support member is installed downstream according to the water flow direction. The second support member is a telescopic member, which is used to adjust the slope of the first bottom plate, so that the turbulence of the water flowing downstream can be simulated, the turbulence of the smooth water flow can be simulated, and the turbulence of the water flowing upstream can be simulated, ensuring the accuracy of the simulated turbulence, and further ensuring the accuracy of dividing the spatial distribution of the turbulence types.

[0025] Combined with the fourth implementation manner of the first aspect, in the sixth implementation manner of the first aspect, the measurement and processing device includes: a slide rail, a slide bar, a flow velocity meter, and a processing component; the number of slide rails is two, which are respectively installed on the edges of the test cavity and parallel to the length direction of the test cavity; both ends of the slide bar are slidably connected to the two slide rails;

[0026] The flow velocity meter is slidably connected to the slide bar, which is used to realize the movement of the flow velocity meter along the width direction of the test cavity, so as to facilitate measuring the water depth corresponding to each part of the vegetation simulation component in the test cavity;

[0027] The processing component is connected to the flow velocity meter, which is used to receive the water depth corresponding to each part of the vegetation simulation component, calculate the vegetation submergence degree according to the relationship between the water depth and the height of the simulated vegetation, and divide the spatial distribution of the turbulence types according to the relationship between the vegetation submergence degree and the vegetation density.

[0028] The simulation system of open-channel turbulence with submerged vegetation provided by the embodiment of the present invention. The measurement and processing device includes: a slide rail, a slide bar, a flow velocity meter, and a processing component; the number of slide rails is two, which are respectively installed on the edges of the test cavity and parallel to the length direction of the test cavity; both ends of the slide bar are slidably connected to the two slide rails; the flow velocity meter is slidably connected to the slide bar, which is used to realize the movement of the flow velocity meter along the width direction of the test cavity, so as to facilitate measuring the water depth corresponding to each part of the vegetation simulation component in the test cavity, and the number of flow velocity meters can be reduced, reducing the cost. The processing component is connected to the flow velocity meter, which is used to receive the water depth corresponding to each part of the vegetation simulation component, calculate the vegetation submergence degree according to the relationship between the water depth and the height of the simulated vegetation, and divide the spatial distribution of the turbulence types according to the relationship between the vegetation submergence degree and the vegetation density, ensuring the accuracy of dividing the spatial distribution of the turbulence types.

[0029] Combined with the first aspect, in the seventh implementation manner of the first aspect, a tail gate is provided at one end of the water outlet of the test cavity, where:

[0030] The tail gate is used to adjust the size of the water outlet.

[0031] The simulation system of open-channel turbulent flow with submerged vegetation provided by the embodiments of the present invention is provided with a tailgate at one end of the water outlet of the test cavity, where: the tailgate is used to adjust the size of the water outlet, so as to adjust the size of the water flow passing through the simulated vegetation, and further adjust the turbulent flow state, ensuring the accuracy of dividing the spatial distribution of the turbulent flow types.

[0032] Combined with the first aspect, in the eighth implementation manner of the first aspect, a water flow straightening component is provided at one end of the water inlet of the test cavity. The water flow straightening component includes: a buffer box and a straightener; where:

[0033] One side of the buffer box is communicated with the water inlet, and the other side is communicated with the straightener; it is used to eliminate the kinetic energy of the water flow and reduce the vertical movement of the water flow;

[0034] The straightener is provided with a water channel, and a plurality of horizontally arranged water passing plates are arranged in the water channel. The straightener is used to eliminate the vertical velocity of the water flow.

[0035] The simulation system of open-channel turbulent flow with submerged vegetation provided by the embodiments of the present invention is provided with a water flow straightening component at one end of the water inlet of the test cavity. The water flow straightening component includes: a buffer box and a straightener; where: one side of the buffer box is communicated with the water inlet, and the other side is communicated with the straightener; it is used to eliminate the kinetic energy of the water flow and reduce the vertical movement of the water flow, ensuring the accuracy of the simulated turbulent flow. The straightener is provided with a water channel, and a plurality of horizontally arranged water passing plates are arranged in the water channel. The straightener is used to eliminate the vertical velocity of the water flow, ensuring the accuracy of the simulated turbulent flow. Furthermore, it can ensure the accuracy of dividing the spatial distribution of the turbulent flow types.

[0036] According to the second aspect, the embodiments of the present invention further provide a classification method for open-channel turbulent flow with submerged vegetation. The method includes:

[0037] Obtain the plant density, vegetation submergence degree, underwater height of the vegetation, water depth, and the distance between the measurement point and the bed surface;

[0038] According to the first relationship between the plant density and the first critical density, the second critical density, and the third critical density, the second relationship between the vegetation submergence degree and the critical submergence degree, and the third relationship between the distance between the measurement point and the bed surface and the underwater height of the vegetation, the water depth, and the upper and lower boundaries of the KH vortex, divide the spatial distribution of the turbulent flow types.

[0039] The classification method of open-channel turbulent flow with submerged vegetation provided by the embodiment of the present invention obtains the plant density, vegetation submergence degree, underwater height of vegetation, water depth, and the distance between the measurement point and the bed surface. Then, according to the first relationship between the plant density and the first critical density, the second critical density, and the third critical density, the second relationship between the vegetation submergence degree and the critical submergence degree, and the third relationship between the distance between the measurement point and the bed surface and the underwater height of vegetation, the water depth, and the upper and lower boundaries of the KH vortex, the spatial distribution of the turbulent flow type is divided, ensuring the accuracy of dividing the spatial distribution of the turbulent flow type. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1 It is a schematic structural diagram of a simulation system for open-channel turbulent flow with submerged vegetation provided by the embodiment of the present invention;

[0042] Figure 2 It is a schematic structural diagram of a simulated vegetation provided by another embodiment of the present invention;

[0043] Figure 3 It is a schematic flowchart of a classification method for open-channel turbulent flow with submerged vegetation provided by another embodiment of the present invention;

[0044] Figure 4 It is a functional module diagram of a classification device for open-channel turbulent flow with submerged vegetation provided by the embodiment of the present invention;

[0045] Figure 5 It is a schematic hardware structure diagram of a measurement and processing device provided by the embodiment of the present invention;

[0046] Wherein:

[0047] Test cavity 1;

[0048] Water tank 2;

[0049] Vegetation simulation component 3;

[0050] First bottom plate 31;

[0051] Second bottom plate 32;

[0052] Simulated vegetation 33;

[0053] First support member 34;

[0054] The second support member 35;

[0055] The measurement and processing device 4;

[0056] The slide rail 41;

[0057] The slide bar 42;

[0058] The current meter 43;

[0059] The processing component 44;

[0060] The return water tank 5;

[0061] The water pump 6;

[0062] The water inlet pipe 7;

[0063] The water extraction pipe 8;

[0064] The filter screen 9;

[0065] The tail gate 10;

[0066] The water flow straightening component 11;

[0067] The buffer tank 111;

[0068] The straightener 112;

[0069] The water passing plate 113. Detailed implementation manners

[0070] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0071] In an embodiment of the present application, as Figure 1 shown, a simulation system for turbulent flow in an open channel with submerged vegetation is provided. The simulation system includes: a test cavity 1, a water tank 2, a vegetation simulation component 3, and a measurement and processing device 4; wherein:

[0072] The vegetation simulation component 3 is installed in the test cavity 1;

[0073] The water tank 2 is installed at one end of the test cavity 1 having a water inlet for supplying water to the vegetation simulation component 3 in the test cavity 1;

[0074] The measurement and processing device 4 is installed above the test chamber 1, and is used to measure the vegetation submergence degree corresponding to various parts of the vegetation simulation component 3 in the test chamber 1, and divide the spatial distribution of the turbulent flow type according to the relationship between the vegetation submergence degree and the vegetation density.

[0075] Specifically, the test chamber 1 is horizontally arranged and has a length of not less than 8 meters. One end of the test chamber 1 is provided with a water inlet, and the other end is provided with a water outlet. The water tank 2 is installed at one end of the test chamber 1 with the water inlet and is communicated with the water inlet; the water tank 2 is used to supply water to the test chamber 1.

[0076] In an optional implementation manner, the length of the test chamber 1 is 12 meters. The water tank 2 is installed at one end of the test chamber 1 with the water inlet and is communicated with the water inlet; the water tank 2 is used to supply water to the test chamber 1.

[0077] The measurement and processing device 4 is fixedly installed or slidably installed above the test chamber 1, and is used to measure the vegetation submergence degree corresponding to various parts of the vegetation simulation component 3 in the test chamber 1, and divide the spatial distribution of the turbulent flow type according to the relationship between the vegetation submergence degree and the vegetation density.

[0078] The simulation system of open-channel turbulent flow with submerged vegetation provided by the embodiment of the present invention includes: a test chamber 1, a water tank 2, a vegetation simulation component 3, and a measurement and processing device 4; the vegetation simulation component 3 is installed in the test chamber 1, and the water tank 2 is installed at one end of the test chamber 1 with the water inlet and is used to supply water to the vegetation simulation component 3 in the test chamber 1, so that the water flow passing through the vegetation simulation component can form open-channel turbulent flow with submerged vegetation. Then, the measurement and processing device 4 is installed above the test chamber 1 and is used to measure the vegetation submergence degree corresponding to various parts of the vegetation simulation component 3 in the test chamber 1, and divide the spatial distribution of the turbulent flow type according to the relationship between the vegetation submergence degree and the vegetation density. The above simulation system of open-channel turbulent flow with submerged vegetation does not need to approximately solve the Navier-Stokes equation to obtain the time and space distribution of the flow. Therefore, it does not need to approximately solve the data, and thus will not cause a certain potential error between the model calculation result and the actual situation. The above simulation system of open-channel turbulent flow with submerged vegetation realizes the research on turbulent flow by simulating the open-channel turbulent flow, so as to ensure the accuracy of dividing the spatial distribution of the turbulent flow type.

[0079] In an optional implementation manner of the present application, as Figure 1 shown, the simulation system further includes: a return water pool 5, the return water pool 5 is installed at one end of the test chamber 1 with the water outlet and is communicated with the water outlet, and the return water pool 5 is used to hold the water flowing out from the water outlet.

[0080] Optionally, the water return pool 5 may include a water return pipe and a water return tank. One end of the water return pipe is connected to the water outlet of the test chamber 1, and the other end extends into the water return tank, so that the water flowing out of the test chamber 1 can be recycled into the water return tank, realizing the self-circulation of the water body.

[0081] The simulation system for open-channel turbulent flow with submerged vegetation provided by the embodiment of the present invention further includes: a water return pool 5, which is installed at one end of the test chamber 1 with a water outlet and is connected to the water outlet. The water return pool 5 is used to hold the water flowing out of the water outlet, thus realizing the self-circulation of the water body, saving water resources, reducing the procedure of manual water addition, saving manpower, and improving efficiency.

[0082] In an optional implementation manner of the present application, a tail gate 10 is provided at one end of the water outlet of the test chamber 1, where: the tail gate 10 is used to adjust the size of the water outlet.

[0083] Specifically, in order to facilitate the control of the water flow velocity and depth, the present embodiment is further improved: a tail gate 10 is provided at one end of the test chamber 1 near the water outlet. The tail gate 10 is used to adjust the size of the water outlet so that the outlet flow rate of the test chamber 1 is equal to the inlet flow rate. At the same time, the size of the water outlet can control the water depth. Under the condition of a certain flow rate, the water flow velocity is indirectly controlled by changing the water depth.

[0084] In the simulation system for open-channel turbulent flow with submerged vegetation provided by the embodiment of the present invention, a tail gate 10 is provided at one end of the water outlet of the test chamber 1, where: the tail gate 10 is used to adjust the size of the water outlet, so that the size of the water flow passing through the simulated vegetation can be adjusted, and then the turbulent flow state can be adjusted, ensuring the accuracy of dividing the spatial distribution of the turbulent flow type.

[0085] In an optional implementation manner of the present application, as Figure 1 shown, the simulation system includes: a water pump 6, a water inlet pipe 7 and a water extraction pipe 8. One end of the water pump 6 is connected to the water inlet pipe 7, and the other end is connected to the water extraction pipe 8; the other end of the water extraction pipe 8 extends into the water return pool 5, and the other end of the water inlet pipe 7 extends into the water tank 2;

[0086] The water pump 6 is used to pump the water in the water return pool 5 into the water tank 2.

[0087] Specifically, the water pump 6 can be a variable-frequency water pump 6 or a fixed-frequency water pump 6, and there is a certain proportional relationship between the frequency of the water pump 6 and the water pumping volume. The embodiment of the present application does not make specific limitations on the water pump 6. The water pump 6 can pump the water in the water return pool 5 into the water pump 6 through the water extraction pipe 8, and then, the water extracted from the water return pool 5 is put into the water tank 2 through the water inlet pipe 7, thus realizing the self-circulation of the water body, enabling the water to be reused, saving water resources, reducing the procedure of manual water addition, saving manpower, and improving efficiency.

[0088] To ensure that the water pumped into the water pump 6 is free of impurities and to prevent impurities from affecting the normal operation of the water pump 6, a filter screen 9 is installed vertically in front of the end of the water suction pipe 8 extending into the return water pool 5 in the direction perpendicular to the water flow direction; the filter screen 9 is used to filter the water pumped into the water pump 6.

[0089] Exemplarily, assuming that when the water pump 6 pumps water upwards, the filter screen 9 is horizontally installed at the front end of the end of the water suction port extending into the return water pool 5. Therefore, the filter screen 9 is horizontally installed in the pumping pool. In this way, for heavier sundries, they sink to the bottom of the return water pool 5 under the action of their own gravity, which can reduce the probability of the filter screen 9 being blocked.

[0090] In an alternative embodiment of the present application, when the water pump 6 pumps the water in the return water pool 5 into the water pump 6 through the water suction pipe 8, a return water channel can be formed in the return water pool 5. One end of the return water channel is communicated with the return water pool 5, and the other end is communicated with the water suction pipe 8.

[0091] The simulation system for turbulent flow in an open channel with submerged vegetation provided by the embodiments of the present invention further includes a water pump 6, a water inlet pipe 7 and a water suction pipe 8. One end of the water pump 6 is connected to the water inlet pipe 7, and the other end is connected to the water suction pipe 8; the other end of the water suction pipe 8 extends into the return water pool 5, and the other end of the water inlet pipe 7 extends into the water tank 2; the water pump 6 is used to pump the water in the return water pool 5 into the water tank 2. The simulation system for turbulent flow in an open channel with submerged vegetation realizes pumping the water in the return water pool 5 back to the water tank 2 through the water pump 6, the water inlet pipe 7 and the water suction pipe 8, thereby realizing the self-circulation of the water body, saving water resources, reducing the procedure of manual water addition, saving manpower and improving efficiency.

[0092] In addition, a filter screen 9 is installed vertically in front of the end of the water suction pipe 8 extending into the return water pool 5 in the direction perpendicular to the water flow direction; the filter screen 9 is used to filter the water pumped into the water pump 6 and filter out impurities in the water, preventing impurities from entering the water pump 6 and affecting the normal use of the water pump 6 or causing damage to the water pump 6.

[0093] In an alternative embodiment of the present application, as Figure 1 shown, the vegetation simulation component 3 includes: a first bottom plate 31, a second bottom plate 32, a simulated vegetation 33, a first support member 34 and a second support member 35; wherein:

[0094] The upper surfaces of the first support member 34 and the second support member 35 are connected to the bottom surface of the first bottom plate 31, and the lower surfaces are respectively connected to the inner bottom surface of the test cavity 1 for supporting the first bottom plate 31;

[0095] The first bottom plate 31 is installed in the test cavity 1 and is used to cooperate with the test cavity 1 to form a water tank;

[0096] The second bottom plate 32 is installed on the upper surface of the first bottom plate 31 and is used to simulate the river bottom and fix the simulated vegetation 33.

[0097] Specifically, the vegetation simulation component 3 includes: a first bottom plate 31, a second bottom plate 32, a simulated vegetation 33, a first support member 34, and a second support member 35. Both the first support member 34 and the second support member 35 are located below the first bottom plate 31. The lower end of the first support member 34 is fixedly installed on the inner bottom surface of the test cavity 1, and the upper end is hinged to the first bottom plate 31; the lower end of the second support member 35 is fixedly installed on the inner bottom surface of the test cavity 1, and the upper end is hinged to the first bottom plate 31.

[0098] The first bottom plate 31 is horizontally arranged in the test cavity 1, and its peripheral side is hermetically connected to the side wall of the test cavity 1; a water tank for water flow is formed between the first bottom plate 31 and the side wall of the test cavity 1; during implementation, the first bottom plate 31 is sealed with the test cavity 1.

[0099] The second bottom plate 32 can be a steel plate. When the second bottom plate 32 is a steel plate, due to the action of gravity, the steel plate completely adheres to the surface of the first bottom plate 31 and will not move due to water flow movement or the inclination of the test cavity 1. The distances between the second bottom plate 32 and the water inlet and outlet in the test cavity 1 are both not less than 2 meters. Exemplarily, in an optional embodiment, the length of the second bottom plate 32 is 8 meters, and the length of the test cavity 1 is 12 meters. In addition, the second bottom plate 32 reduces the resistance on the riverbed surface to a certain extent, thus not affecting the water flow movement, thereby reducing the difference between the turbulence in the test cavity 1 and the natural turbulence, and ensuring the accuracy of the turbulence simulated by the simulation system based on the open-channel turbulence with submerged vegetation.

[0100] The simulated vegetation 33 can be a magnetic adsorption type simulated vegetation, such as Figure 2 shown, the magnetic adsorption type simulated vegetation is composed of a magnetic adsorption base, vegetation stems and leaves, etc. Among them, the magnetic adsorption base is used for the root of the simulated vegetation. Due to its magnetic adsorption ability, it can be arranged at any position on the steel plate as needed and keep its position fixed during the test; the vegetation stems and leaves are composed of cylindrical rods, plastic sheets, etc., and can be reasonably simulated according to the morphological and mechanical characteristics of natural vegetation.

[0101] In an optional implementation manner of the present application, the first support member 34 is installed upstream according to the water flow direction, the second support member 35 is installed downstream according to the water flow direction, and the second support member 35 is a telescopic member for adjusting the slope of the first bottom plate 31.

[0102] Specifically, the first support member 34 is installed upstream according to the water flow direction, the second support member 35 is installed downstream according to the water flow direction, and the first support member 34 and the second support member 35 are respectively at the one-third and two-thirds positions of the length direction of the first bottom plate 31. The second support member 35 is a telescopic member, so that the slope of the first bottom plate 31 can be adjusted by adjusting the length of the second support member 35.

[0103] In an alternative embodiment of the present application, the first support member 34 and the second support member 35 may both be telescopic members. By simultaneously adjusting the first support member 34 and the second support member 35, the height of the first bottom plate 31 can be adjusted.

[0104] The simulation system for turbulent flow in an open channel with submerged vegetation provided by the embodiment of the present invention, the vegetation simulation component 3 includes: a first bottom plate 31, a second bottom plate 32, a simulated vegetation 33, a first support member 34 and a second support member 35; wherein: the upper surfaces of the first support member 34 and the second support member 35 are connected to the bottom surface of the first bottom plate 31, and the lower surfaces are respectively connected to the inner bottom surface of the test cavity 1 for supporting the first bottom plate 31; the first bottom plate 31 is installed in the test cavity 1 and is used to cooperate with the test cavity 1 to form a water tank so that water can flow and be stored in the water tank. The second bottom plate 32 is installed on the upper surface of the first bottom plate 31 and is used to simulate the river bottom and fix the simulated vegetation 33, and to reduce the resistance on the river bed surface to a certain extent, so as not to affect the water flow movement, thereby reducing the difference between the turbulent flow in the test cavity 1 and the natural turbulent flow, ensuring the accuracy of the turbulent flow simulated by the simulation system for turbulent flow in an open channel with submerged vegetation, and further ensuring the accuracy of dividing the spatial distribution of the turbulent flow types.

[0105] In addition, the first support member 34 is installed upstream according to the water flow direction, and the second support member 35 is installed downstream according to the water flow direction. The second support member 35 is a telescopic member used to adjust the slope of the first bottom plate 31, so that it can simulate the turbulent flow of water flowing downstream, the turbulent flow of smooth water flow, and the turbulent flow of water flowing upstream, ensuring the accuracy of the simulated turbulent flow, and further ensuring the accuracy of dividing the spatial distribution of the turbulent flow types.

[0106] In an alternative embodiment of the present application, as Figure 1 shown, the measurement and processing device 4 includes: a slide rail 41, a slide bar 42, a flow velocity meter 43 and a processing component 44; the number of the slide rails 41 is two, which are respectively installed on the edge of the test cavity 1 and are parallel to the length direction of the test cavity 1; both ends of the slide bar 42 are slidably connected to the two slide rails 41;

[0107] The flow velocity meter 43 is slidably connected to the slide bar 42 and is used to move the flow velocity meter 43 along the width direction of the test cavity 1, so as to facilitate measuring the water depth corresponding to each part of the vegetation simulation component 3 in the test cavity 1;

[0108] The processing component 44 is connected to the flow velocity meter 43 and is used to receive the water depth corresponding to each part of the vegetation simulation component 3, calculate the vegetation submergence degree according to the relationship between the water depth and the height of the simulated vegetation 33, and divide the spatial distribution of the turbulent flow types according to the relationship between the vegetation submergence degree and the vegetation density.

[0109] Specifically, the measurement and processing device 4 includes a slide rail 41, a slide bar 42, a flow velocity meter 43, and a processing component 44. There are two slide rails 41, which are respectively arranged parallel to the two edges of the test cavity 1, and the length direction of the slide rail 41 is parallel to the length direction of the test cavity 1; in this way, the flow velocity meter 43 can be moved along the length direction of the test cavity 1. Both ends of the slide bar 42 are slidably connected to the two slide rails 41; the flow velocity meter 43 is slidably connected to the slide bar 42. By setting the slide bar 42, the flow velocity meter 43 can be moved along the width direction of the test cavity 1. In this way, the vegetation submergence degree corresponding to each part of the vegetation simulation component 3 can be measured.

[0110] Among them, the flow velocity meter 43 can be a Doppler flow velocity meter or other flow velocity meters, and the embodiments of the present application do not make specific limitations on the flow velocity meter 43.

[0111] The processing component 44 is connected to the flow velocity meter 43, and is used to receive the water depth corresponding to each part of the vegetation simulation component 3, calculate the vegetation submergence degree according to the relationship between the water depth and the height of the simulated vegetation 33, and divide the spatial distribution of the turbulent flow type according to the relationship between the vegetation submergence degree and the vegetation density.

[0112] The simulation system of open-channel turbulent flow with submerged vegetation provided by the embodiments of the present invention, the measurement and processing device 4 includes a slide rail 41, a slide bar 42, a flow velocity meter 43, and a processing component 44; there are two slide rails 41, which are respectively installed on the edge of the test cavity 1 and are parallel to the length direction of the test cavity 1; both ends of the slide bar 42 are slidably connected to the two slide rails 41; the flow velocity meter 43 is slidably connected to the slide bar 42, which is used to realize the movement of the flow velocity meter 43 along the width direction of the test cavity 1, facilitate the measurement of the water depth corresponding to each part of the vegetation simulation component 3 in the test cavity 1, and can reduce the number of flow velocity meters 43, thus reducing the cost. The processing component 44 is connected to the flow velocity meter 43, and is used to receive the water depth corresponding to each part of the vegetation simulation component 3, calculate the vegetation submergence degree according to the relationship between the water depth and the height of the simulated vegetation 33, and divide the spatial distribution of the turbulent flow type according to the relationship between the vegetation submergence degree and the vegetation density, ensuring the accuracy of dividing the spatial distribution of the turbulent flow type.

[0113] In an alternative embodiment of the present application, as Figure 1 shown, a water flow straightening component 11 is provided at one end of the water inlet of the test cavity 1, and the water flow straightening component 11 includes a buffer tank 111 and a straightener 112; where:

[0114] One side of the buffer tank 111 is communicated with the water inlet, and the other side is communicated with the straightener 112; it is used to eliminate the kinetic energy of the water flow and reduce the vertical movement of the water flow;

[0115] The straightener 112 is provided with a water channel, and a plurality of horizontally arranged water passing plates 113 are arranged in the water channel. The straightener 112 is used to eliminate the vertical velocity of the water flow.

[0116] Specifically, in order to weaken the secondary flow in the cross-sectional direction, the simulation system of open-channel turbulence with submerged vegetation provided in this embodiment is provided with a water flow straightening component 11 at the water inlet. Further, the water flow straightening component 11 includes a buffer tank 111 and a straightener 112; the buffer tank 111 is used to eliminate the kinetic energy of the water flow and reduce the vertical movement of the water flow. The straightener 112 is used to eliminate the vertical velocity of the water flow.

[0117] Specifically, one side of the buffer tank 111 is communicated with the water inlet, and the other side is communicated with the straightener 112; the buffer tank 111 is filled with sponge. The straightener 112 is provided with a water channel, and a plurality of horizontally arranged water passing plates 113 are arranged in the water channel. The water passing plates 113 are arranged with gaps (horizontal to the ground), dividing the water channel into a plurality of water outlet holes; the thickness of the water passing plates 113 is not greater than 0.5 mm; the cross-sections of the plurality of water outlet holes 54 are all rectangles with equal long sides, and the dimensions of the plurality of water outlet holes in the vertical direction gradually decrease in the direction from top to bottom. In this way, it can ensure the smooth flow of the water flow passing through the water flow straightening component 11 to reduce interference.

[0118] Further, the water tank 2, the buffer tank 111 and the straightener 112 are distributed in sequence along the direction close to the test cavity 1; and the connection between the water tank 2 and the buffer tank 111, the connection between the buffer tank 111 and the straightener 112, and the connection between the straightener 112 and the test cavity 1 are all located at positions facing the center line of the test cavity 1. Such a setting can reduce the vertical flow of the water flow before entering the test cavity 1.

[0119] In the simulation system of open-channel turbulence with submerged vegetation provided by the invention embodiment, a water flow straightening component 11 is arranged at one end of the water inlet of the test cavity 1. The water flow straightening component 11 includes: a buffer tank 111 and a straightener 112; wherein: one side of the buffer tank 111 is communicated with the water inlet, and the other side is communicated with the straightener 112; it is used to eliminate the kinetic energy of the water flow and reduce the vertical movement of the water flow, ensuring the accuracy of the simulated turbulence. The straightener 112 is provided with a water channel, and a plurality of horizontally arranged water passing plates 113 are arranged in the water channel. The straightener 112 is used to eliminate the vertical velocity of the water flow, ensuring the accuracy of the simulated turbulence. Furthermore, it can ensure the accuracy of dividing the spatial distribution of the turbulence type.

[0120] In order to better illustrate the simulation system of open-channel turbulence with submerged vegetation provided by the embodiments of the present application, the embodiments of the present application provide a classification method for open-channel turbulence with submerged vegetation, which is applied to the measurement and processing device in the simulation system of open-channel turbulence with submerged vegetation in any of the above embodiments, such as Figure 3As shown, the method includes:

[0121] S11. Obtain the plant density, vegetation inundation degree, underwater height of vegetation, water depth, and the distance between the measurement point and the bed surface.

[0122] Specifically, the measurement and processing device can receive the plant density input by the user, or the plant density sent by other devices, or calculate the plant density based on the number of plants and the area occupied by the plants.

[0123] The measurement and processing device can measure the water depth and the height of the plants, and then divide the water depth by the plant height to obtain the vegetation inundation degree.

[0124] The measurement and processing device can measure the underwater height of the vegetation and the distance between the measurement point and the bed surface.

[0125] S12. Divide the spatial distribution of the turbulent flow type according to the first relationship between the plant density and the first critical density, the second critical density, and the third critical density, the second relationship between the vegetation inundation degree and the critical inundation degree, and the third relationship between the distance between the measurement point and the bed surface and the underwater height of the vegetation, the water depth, and the upper and lower boundaries of the KH vortex.

[0126] Specifically, assume the plant density is λ, the first critical density is λ B , the second critical density is λ KH , the third critical density is λ NB , the vegetation inundation degree is Sub, and the critical inundation degree is Sub cri (Optionally, Sub cri can be equal to 2 or other values). The distance between the measurement point and the bed surface is z, the underwater height of the vegetation is hv, the water depth is H, and according to the occurrence of the KH vortex, judge the upper and lower boundaries ho and hp of the KH vortex (where ho≈1.7hv, hp = hv·(1 - 0.23 / λ)),

[0127] The measurement and processing device compares the plant density with the first critical density, the second critical density, and the third critical density to obtain the first relationship between the plant density and the first critical density, the second critical density, and the third critical density. The measurement and processing device compares the vegetation submergence degree with the critical submergence degree to obtain the second relationship between the vegetation submergence degree and the critical submergence degree. The measurement and processing device compares the distance between the measurement point and the bed surface with the underwater height of the vegetation, the water depth, and the upper and lower boundaries of the KH vortex to obtain the third relationship between the distance between the measurement point and the bed surface and the underwater height of the vegetation, the water depth, and the upper and lower boundaries of the KH vortex. Then, according to the first relationship between the plant density and the first critical density, the second critical density, and the third critical density, the second relationship between the vegetation submergence degree and the critical submergence degree, and the third relationship between the distance between the measurement point and the bed surface and the underwater height of the vegetation, the water depth, and the upper and lower boundaries of the KH vortex, the spatial distribution of the turbulent flow type is divided.

[0128] Exemplarily, in the first case, when 0 < λ < λ B Case

[0129] If 0 < z < hv, the wake and the bed shear turbulence act together;

[0130] If hv < z < H, the bed shear turbulence acts;

[0131] In the second case, when λ B < λ < λ KH Case

[0132] If 0 < z < hv, the wake acts and has some characteristics of the bed shear turbulence and the free shear mixing layer flow;

[0133] If hv < z < H, it has some characteristics of the bed shear turbulence and the free shear mixing layer flow;

[0134] In the third case, when λ KH < λ < λ NB And Sub > Sub cri Case

[0135] If 0 < z < hp, the wake acts;

[0136] If hp < z < hv, the wake and the free shear mixing layer flow act together;

[0137] If hv < z < ho, the free shear mixing layer flow;

[0138] If ho < z < H, it is similar to the bed shear flow;

[0139] In the fourth case, when λ KH < λ < λ NBand Sub<Sub cri In the case of

[0140] If 0 < z < hp, the wake effect occurs;

[0141] If hp < z < hv, the wake effect occurs, and it also has some characteristics of the free shear mixing layer flow;

[0142] If hv < z < 1.7hv, it is similar to the free shear mixing layer flow;

[0143] In the fourth case, when λ > λNB,

[0144] If 0 < z < hv, it is similar to the pore flow;

[0145] If hv < z < H, it is the "secondary wall" shear turbulence.

[0146] Through the above steps, the type of turbulence and the characteristics of turbulent motion can be quickly judged.

[0147] The classification method of open-channel turbulence with submerged vegetation provided by the embodiment of the present invention obtains the plant density, vegetation submergence degree, underwater height of vegetation, water depth, and the distance between the measuring point and the bed surface. Then, according to the first relationship between the plant density and the first critical density, the second critical density, and the third critical density, the second relationship between the vegetation submergence degree and the critical submergence degree, and the third relationship between the distance between the measuring point and the bed surface and the underwater height of vegetation, the water depth, and the upper and lower boundaries of the KH vortex, the spatial distribution of the turbulence type is divided, ensuring the accuracy of dividing the spatial distribution of the turbulence type.

[0148] It should be understood that although Figure 3 the steps in the flowchart of Figure 3 are shown in sequence according to the indication of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover,

[0149] such as Figure 4 shown, the present embodiment provides a classification device for open-channel turbulence with submerged vegetation, which is applied to the simulation system of open-channel turbulence with submerged vegetation in any of the above embodiments. The method includes:

[0150] An acquisition module 121 for acquiring plant density, vegetation submergence degree, underwater vegetation height, water depth, and the distance between the measurement point and the bed surface;

[0151] A division module 122 for dividing the spatial distribution of the turbulent flow type according to the first relationship between the plant density and the first critical density, the second critical density, and the third critical density, the second relationship between the vegetation submergence degree and the critical submergence degree, and the third relationship between the distance between the measurement point and the bed surface and the underwater vegetation height, the water depth, and the upper and lower boundaries of the KH vortex.

[0152] For the specific limitations and beneficial effects of the classification device for open-channel turbulent flow with submerged vegetation, reference can be made to the limitations of the classification method for open-channel turbulent flow with submerged vegetation in the above text, which will not be elaborated here. Each module in the above classification device for open-channel turbulent flow with submerged vegetation can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor of the measurement and processing device in hardware form or independent of it, or stored in the memory of the measurement and processing device in software form, so that the processor can call and execute the operations corresponding to each of the above modules.

[0153] An embodiment of the present invention further provides a measurement and processing device having the above Figure 4 shown classification device for open-channel turbulent flow with submerged vegetation.

[0154] As Figure 5 shown, Figure 5 is a schematic structural diagram of a measurement and processing device provided by an optional embodiment of the present invention. As Figure 5 shown, the measurement and processing device may include: at least one processor 71, such as a CPU (Central Processing Unit, central processor), at least one communication interface 73, a memory 74, and at least one communication bus 72. Among them, the communication bus 72 is used to realize the connection and communication between these components. Among them, the communication interface 73 may include a display screen (Display) and a keyboard (Keyboard). Optionally, the communication interface 73 may further include a standard wired interface and a wireless interface. The memory 74 may be a high-speed RAM memory (Random Access Memory, volatile random access memory), or a non-volatile memory, such as at least one disk memory. Optionally, the memory 74 may further be at least one storage device located far from the aforementioned processor 71. Among them, the processor 71 may be combined with Figure 4 the described device, the memory 74 stores an application program, and the processor 71 calls the program code stored in the memory 74 to execute any of the above method steps.

[0155] Among them, the communication bus 72 can be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus 72 can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 5 only a thick line is used to represent it in Figure 5 , but it does not mean that there is only one bus or one type of bus.

[0156] Among them, the memory 74 can include volatile memory, such as random-access memory (RAM); the memory can also include non-volatile memory, such as flash memory, hard disk drive (HDD), or solid-state drive (SSD); the memory 74 can also include a combination of the above types of memories.

[0157] Among them, the processor 71 can be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP.

[0158] Among them, the processor 71 can further include a hardware chip. The above hardware chip can be an Application-Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The above PLD can be a Complex Programmable Logic Device (CPLD), a Field-Programmable Gate Array (FPGA), a Generic Array Logic (GAL), or any combination thereof.

[0159] Optionally, the memory 74 is further used to store program instructions. The processor 71 can call the program instructions to implement the classification method of the turbulent flow in an open channel with submerged vegetation as shown in the embodiments of the present application Figure 3 for the classification method of the turbulent flow in an open channel with submerged vegetation shown in the embodiments of the present application.

[0160] An embodiment of the present invention also provides a non-transitory computer storage medium, which stores computer-executable instructions that can execute the classification method of open-channel turbulent flow with submerged vegetation in any of the above method embodiments. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above types of memories.

[0161] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A simulation system for turbulent flow in an open channel with submerged vegetation, characterized in that, the simulation system includes: a test cavity, a water tank, a vegetation simulation component, and a measurement and processing device; wherein: the vegetation simulation component is installed in the test cavity; the water tank is installed at one end of the test cavity having a water inlet, and is used to supply water to the vegetation simulation component in the test cavity; the measurement and processing device is installed above the test cavity, and is used to measure the vegetation submergence degree corresponding to each part of the vegetation simulation component in the test cavity, and divide the spatial distribution of the turbulent flow type according to the relationship between the vegetation submergence degree and the vegetation density; wherein, the dividing the spatial distribution of the turbulent flow type according to the relationship between the vegetation submergence degree and the vegetation density includes: obtaining the plant density, vegetation submergence degree, underwater height of the vegetation, water depth, and the distance between the measurement point and the bed surface; dividing the spatial distribution of the turbulent flow type according to the first relationship between the plant density and the first critical density, the second critical density, the third critical density, the second relationship between the vegetation submergence degree and the critical submergence degree, and the third relationship between the distance between the measurement point and the bed surface and the underwater height of the vegetation, the water depth, and the upper and lower boundaries of the KH vortex; wherein, if 0 < the plant density < the first critical density, and 0 < the distance between the measurement point and the bed surface < the underwater height of the vegetation, it is the combined action of wake and bed shear turbulence; if 0 < the plant density < the first critical density, and the underwater height of the vegetation < the distance between the measurement point and the bed surface < the water depth, it is the action of bed shear turbulence.

2. The simulation system according to claim 1, characterized in that, the simulation system further includes: a return water pool, the return water pool is installed at one end of the test cavity having a water outlet and is communicated with the water outlet, and the return water pool is used to hold the water flowing out from the water outlet.

3. The simulation system according to claim 2, characterized in that, the simulation system includes: a water pump, a water inlet pipe, and a water extraction pipe, one end of the water pump is connected to the water inlet pipe, and the other end is connected to the water extraction pipe; the other end of the water extraction pipe extends into the return water pool, and the other end of the water inlet pipe extends into the water tank; the water pump is used to pump the water in the return water pool into the water tank.

4. The simulation system according to claim 3, characterized in that, a filter screen is installed perpendicular to the water flow direction in front of the end of the water extraction pipe extending into the return water pool; the filter screen is used to filter the water pumped into the water pump.

5. The simulation system according to claim 1, characterized in that, the vegetation simulation component includes: a first bottom plate, a second bottom plate, simulated vegetation, a first support member, and a second support member; wherein: the upper surfaces of the first support member and the second support member are connected to the bottom surface of the first bottom plate, and the lower surfaces are respectively connected to the inner bottom surface of the test cavity, and are used to support the first bottom plate; the first bottom plate is installed in the test cavity and is used to cooperate with the test cavity to form a water trough; The second bottom plate is installed on the upper surface of the first bottom plate and is used to simulate the river bottom and fix the simulated vegetation.

6. The simulation system according to claim 5, wherein, the first support member is installed upstream according to the water flow direction, the second support member is installed downstream according to the water flow direction, and the second support member is a telescopic member for adjusting the slope of the first bottom plate.

7. The simulation system according to claim 5, wherein, the measurement and processing device includes: a slide rail, a slide bar, a flow velocity meter and a processing component; the number of the slide rails is two, which are respectively installed on the edges of the test cavity and are parallel to the length direction of the test cavity; both ends of the slide bar are slidably connected to the two slide rails; the flow velocity meter is slidably connected to the slide bar for enabling the flow velocity meter to move along the width direction of the test cavity, so as to facilitate measuring the water depth corresponding to each part of the vegetation simulation component in the test cavity; the processing component is connected to the flow velocity meter for receiving the water depth corresponding to each part of the vegetation simulation component, calculating the vegetation submergence degree according to the relationship between the water depth and the height of the simulated vegetation, and dividing the spatial distribution of the turbulent flow type according to the relationship between the vegetation submergence degree and the vegetation density.

8. The simulation system according to claim 1, wherein, a tail gate is arranged at one end of the water outlet of the test cavity, and specifically: the tail gate is used to adjust the size of the water outlet.

9. The simulation system according to claim 1, wherein, a water flow straightening component is arranged at one end of the water inlet of the test cavity, and the water flow straightening component includes: a buffer box and a straightener; specifically: one side of the buffer box is communicated with the water inlet, and the other side is communicated with the straightener; it is used to eliminate the kinetic energy of the water flow and reduce the vertical movement of the water flow; the straightener is provided with a water channel, and a plurality of horizontally arranged water passing plates are arranged in the water channel, and the straightener is used to eliminate the vertical velocity of the water flow.

10. A classification method for open-channel turbulent flow with submerged vegetation, wherein, applied to the simulation system for open-channel turbulent flow with submerged vegetation according to any one of claims 1-9, the method includes: acquiring the plant density, vegetation submergence degree, underwater height of the vegetation, water depth and the distance between the measurement point and the bed surface; dividing the spatial distribution of the turbulent flow type according to the first relationship between the plant density and the first critical density, the second critical density and the third critical density, the second relationship between the vegetation submergence degree and the critical submergence degree, and the third relationship between the distance between the measurement point and the bed surface and the underwater height of the vegetation, the water depth and the upper and lower boundaries of the KH vortex; wherein, if 0 < the plant density < the first critical density and 0 < the distance between the measurement point and the bed surface < the underwater height of the vegetation, it is the combined action of the wake flow and the bed shear turbulent flow; if 0 < the plant density < the first critical density and the underwater height of the vegetation < the distance between the measurement point and the bed surface < the water depth, it is the action of the bed shear turbulent flow.

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