High-performance perforated plate flowmeter and verification method

Abstract

The invention relates to the technical field of perforated plate flow meters, in particular to a high-performance perforated plate flow meter and a verification method.The high-performance perforated plate flow meter comprises a perforated plate body, and the specific parameters of the high-performance perforated plate flow meter are as follows: the number n of peripheral small holes is equal to 4; the central aperture d1 is equal to 0.1 D, and the pitch radius r of the circle center of the peripheral small hole is equal to 0.32 D; the diameter dq of the pressure tapping hole is 0.03D, and the distance L1 of the front pressure tapping hole is 25.4 mm; the distance L2 of the rear pressure tapping hole is 25.4 mm; wherein D is the inner diameter of the pipeline. The verification method of the high-performance perforated plate flowmeter has the advantages of being low in cost, high in flow measurement precision and small in flow loss.

Description

Technical Field

[0001] The present invention relates to the technical field of orifice plate flowmeters, and in particular to a high-performance orifice plate flowmeter and a verification method thereof. Background Art

[0002] The orifice plate flowmeter is a common differential pressure flowmeter and is widely used in industrial fluid measurement. The traditional single orifice plate flowmeter is widely used due to its simple structure and low cost, but its measurement accuracy is affected by various factors. The presence of pipeline accessories such as elbows and valves will cause flow field distortion, thereby affecting the accuracy of the measurement results. In order to improve the measurement accuracy and stability of the flowmeter, the orifice plate flowmeter has emerged. The orifice plate flowmeter can distribute the kinetic energy of the fluid more evenly by setting multiple holes on the plate body, reduce the pressure loss of the fluid before and after the orifice plate, and thus improve the measurement accuracy.

[0003] However, the design and optimization of the orifice plate flowmeter are relatively complex and require consideration of various factors such as the number of holes, hole diameter, and position distribution of the holes. At present, the design of the orifice plate flowmeter mainly relies on empirical formulas and physical experiments, and there are problems such as long design cycles, high costs, and unsatisfactory optimization effects. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned existing verification methods for high-performance orifice plate flowmeters, the present invention is proposed.

[0005] Therefore, one object of the present invention is to provide a high-performance orifice plate flowmeter.

[0006] To solve the above technical problems, the present invention provides the following technical solution: A high-performance orifice plate flowmeter includes an orifice plate body, and its specific parameters are as follows: the number of peripheral small holes n = 4; the center hole diameter d1 = 0.1D, and the radius of the circumferential pitch circle of the centers of the peripheral small holes r = 0.32D; the diameter of the pressure tapping hole dq = 0.03D, the distance of the front pressure tapping hole L1 = 25.4 mm; the distance of the rear pressure tapping hole L2 = 25.4 mm; where D is the inner diameter of the pipeline.

[0007] As a preferred scheme of the high-performance orifice plate flowmeter of the present invention, wherein: the value range of the diameter dq of the pressure tapping hole is 3 - 13 mm.

[0008] As a preferred scheme of the high-performance orifice plate flowmeter of the present invention, wherein: the pressure tapping method of the orifice plate body is flange pressure tapping; the orifice plate body is made of stainless steel material.

[0009] As a preferred scheme of the high-performance orifice plate flowmeter of the present invention, wherein: the required length of the front straight pipe section is 4 times the pipeline diameter, and the length of the rear straight pipe section is 2 times the pipeline diameter.

[0010] Advantages of this high-performance orifice plate flowmeter: It has the advantages of low cost, high flow measurement accuracy, and small flow loss.

[0011] Another object of the present invention is to provide a verification method for a high-performance orifice plate flowmeter.

[0012] To solve the above technical problems, the present invention provides the following technical solution: A verification method for a high-performance orifice plate flowmeter, including;

[0013] Design and establish orifice plate structure models with different structures;

[0014] Import the orifice plate flowmeter models with different structures into the mesh generation software ICEM, use block-structured meshes to mesh the models, and encrypt the meshes near the wall surface;

[0015] Using water as the working fluid, perform steady-state numerical simulations for different working conditions on the meshed models using the Realizable turbulence model to obtain simulation data.

[0016] As a preferred embodiment of the verification method for the high-performance orifice plate flowmeter of the present invention, wherein: The steps of using the Realizable turbulence model are as follows:

[0017] Import the meshed orifice plate flowmeter model into the FLUENT software, and use the Scale option in the General tab to change the model unit to meters;

[0018] Set the turbulence model and wall function in the Model option;

[0019] Define the flowing working fluid as water in the Material tab;

[0020] Define the boundary conditions in the Boundary Condition tab;

[0021] Set the calculation method in the Solution Methods tab;

[0022] Set the convergence residuals in the Monitors tab;

[0023] In the Solution Initialization tab, select Absolute under Standard Initialization, input the initial parameters, and click the Initialize option to complete the initialization;

[0024] Set the save steps and save location in sequence in the CalculationActivities option;

[0025] After setting the number of calculation steps in the Run Calculation tab, click the Calculation option to start the calculation, and finally obtain the simulation data under different working conditions.

[0026] As a preferred solution of the verification method for the high-performance orifice plate flowmeter described in the present invention, the following steps are included: Open the simulation data with CFD-POST software, and extract the flow rate through the orifice plate, the total pressure at 1 pipe diameter in front of the orifice plate, the total pressure at 6 pipe diameters behind the orifice plate, and the pressures at the pressure tapping points in front of and behind the orifice plate for each working condition in Expressions. Finally, obtain the pressure loss and discharge coefficient of the orifice plate flowmeter under different working conditions.

[0027] As a preferred solution of the verification method for the high-performance orifice plate flowmeter described in the present invention, the following steps are included: Determine a high-performance orifice plate flowmeter based on the pressure loss and discharge coefficient of orifice plate flowmeters with different structures obtained from numerical simulations under different working conditions.

[0028] As a preferred solution of the verification method for the high-performance orifice plate flowmeter described in the present invention, the following steps are included: Use superheated steam as the working medium to perform steady-state numerical simulations of the high-performance orifice plate flowmeter under different working conditions to obtain simulation data.

[0029] As a preferred solution of the verification method for the high-performance orifice plate flowmeter described in the present invention, the following steps are included: Use water as the working medium to perform steady-state numerical simulations of the high-performance orifice plate flowmeter with front and rear elbows under different working conditions to obtain simulation data.

[0030] The beneficial effects of the present invention: By simulating different orifice plate flowmeter structures, verify the performance of the orifice plate flowmeter, and determine the specification parameters of the high-performance orifice plate. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only 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.

[0032] Figure 1 It is a schematic diagram of the overall structure of the high-performance orifice plate flowmeter of the present invention.

[0033] Figure 2 It is a schematic diagram of different structural parameters of the orifice plate flowmeter for the high-performance orifice plate flowmeter of the present invention.

[0034] Figure 3 It is a flow chart of the verification method for the high-performance orifice plate flowmeter of the present invention.

[0035] Figure 4Schematic diagram of porous plates with different structures for the verification method of the high-performance porous plate flowmeter of the present invention.

[0036] Figure 5 Mesh division result of a certain structure porous plate established for the verification method of the high-performance porous plate flowmeter of the present invention.

[0037] Figure 6 For the verification method of the high-performance porous plate flowmeter of the present invention, when the flow rate is 228.2 kg / s, under the same simulation method, for different central hole diameters, the curve of the pressure at the pressure tapping point behind the porous plate changing with the calculation step.

[0038] Figure 7 For the verification method of the high-performance porous plate flowmeter of the present invention, when the flow rate is 228.2 kg / s, under the same simulation method, for different circumferential pitch circle radii of the centers of the peripheral small holes, the curve of the pressure at the pressure tapping point behind the porous plate changing with the calculation step.

[0039] Figure 8 For the verification method of the high-performance porous plate flowmeter of the present invention, when the flow rate is 228.2 kg / s, under the same simulation method, for different aperture ratio structures, the curve of the pressure at the pressure tapping point behind the porous plate changing with the calculation step. Detailed implementation manners

[0040] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings of the specification.

[0041] In the following description, many specific details are set forth to facilitate a thorough understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0042] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present invention. The "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that mutually excludes other embodiments.

[0043] Thirdly, the present invention is described in detail in conjunction with schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0044] Example 1, referring to Figure 1 and Figure 2, which is the first embodiment of the present invention, provides a high-performance orifice plate flowmeter, including an orifice plate body 100, and its specific parameters are as follows: the number of peripheral small holes n = 4; the center hole diameter d1 = 0.1D, and the radius r of the pitch circle of the centers of the peripheral small holes = 0.32D; the diameter dq of the pressure tapping hole = 0.03D, the distance L1 from the front pressure tapping hole = 25.4 mm; the distance L2 from the rear pressure tapping hole = 25.4 mm; where D is the inner diameter of the pipeline.

[0045] Among them, regarding the relevant structural parameters of the orifice plate flowmeter, the explanations are as follows, as Figure 2 shown:

[0046] Pipeline diameter D: the straight pipe diameters before and after the orifice plate;

[0047] Diameter ratio β: the equivalent diameter of the orifice area of the orifice plate / the pipeline diameter;

[0048] Orifice plate thickness E: the thickness of the orifice plate, in the present invention E = 0.03D;

[0049] Thickness e of the straight section of the throttling hole of the orifice plate: the length of the straight section of the small hole of the orifice plate, in the present invention e = 0.02D;

[0050] Chamfer angle α of the throttling hole: the chamfer angle of the small hole of the orifice plate on the outflow side, in the present invention α = 45°;

[0051] Center hole diameter d1: the diameter of the central circular hole of the orifice plate;

[0052] Radius r of the pitch circle of the peripheral small holes: the radius of the pitch circle where the centers of the peripheral small holes of the orifice plate are located;

[0053] Number of holes n: the number of peripheral small holes of the orifice plate;

[0054] Peripheral small hole diameter d2: the diameter of the peripheral small holes of the orifice plate, determined according to the number of holes n, the diameter ratio β, and the center hole diameter d1;

[0055] Pressure tapping method: flange pressure tapping is adopted in this design;

[0056] Diameter dq of the pressure tapping hole: the diameter of the pressure tapping hole, in the present invention dq = 0.03D, and dq is between 3 and 13 mm;

[0057] Distance L1 from the front pressure tapping hole: the distance between the center of the front pressure tapping hole and the front surface of the orifice plate, L1 = 25.4 mm;

[0058] Distance L2 from the rear pressure tapping hole: the distance between the center of the rear pressure tapping hole and the rear surface of the orifice plate, L2 = 25.4 mm.

[0059] In order to verify the performance of the orifice plate flowmeter, the Fluent software was used to conduct steady numerical simulations on orifice plate flowmeters with different structures and different working fluids. The Realizable k-ε turbulence model was adopted for the simulations. Except for the different orifice plate structures, the numerical simulation methods were exactly the same. Finally, the performance of orifice plate flowmeters with different structures was obtained, and the orifice plate flowmeter with the best performance was ultimately determined.

[0060] Among them, the pressure losses of orifice plate flowmeters with different numbers of peripheral small holes are not very different. Considering the cost savings in processing, the number of small holes n = 4 in the periphery was selected;

[0061] When the orifice ratio β = 0.6, as the central orifice diameter increases, the flow measurement of the orifice plate flowmeter becomes more unstable. After comprehensively considering the pressure loss and the stability of flow measurement, the central orifice diameter d1 = 0.1D was selected;

[0062] When the orifice ratio β = 0.6, as the circumferential radius of the center circle of the peripheral small holes decreases, the pressure difference fluctuation before and after the orifice plate flowmeter becomes larger, and the flow measurement becomes more unstable. In order to ensure the stability of flow measurement, the circumferential radius of the center circle of the peripheral small holes r = 0.32D was selected;

[0063] Based on the above results, when the orifice ratio β = 0.6, the high-performance orifice plate structure is: the number of holes n = 4, the central orifice diameter d1 = 0.1D, and the circumferential radius of the center circle of the peripheral small holes r = 0.32D;

[0064] When the orifice ratio β changes, the structural parameters of the high-performance orifice plate flowmeter should change accordingly, as shown in Table 1;

[0065] Table 1: Structural parameters of high-performance orifice plate flowmeters under different orifice ratios

[0066]

[0067] The main structural parameters of the finally determined high-performance orifice plate flowmeter are shown in Table 1, and the remaining parameters are as follows:

[0068] The number of holes n = 4; flange pressure tapping; the diameter of the pressure tapping hole dq = 0.03D, and dq is between 3 and 13 mm; the distance of the front pressure tapping hole L1 = 25.4 mm; the distance of the rear pressure tapping hole L2 = 25.4 mm.

[0069] Furthermore, it was determined that the length of the front straight pipe section required for the measurement of the orifice plate flowmeter is 4 times the pipe diameter, and the length of the rear straight pipe section is 2 times the pipe diameter.

[0070] Furthermore, the pressure tapping method of the orifice plate body 100 is flange pressure tapping; the orifice plate body 100 is made of stainless steel material.

[0071] Example 2, refer to Figures 1-8, which is the second embodiment of the present invention, provides a method for verifying a high-performance orifice plate flowmeter: This method includes:

[0072] Design and establish orifice plate structure models with different structures; as Figure 4 shown in the schematic diagrams of orifice plates with different structures designed.

[0073] Import the orifice plate flowmeter models with different structures into the mesh generation software ICEM, use block-structured meshes to generate meshes for the models, and refine the meshes near the wall surfaces;

[0074] Using water as the working medium, perform steady-state numerical simulations for different working conditions on the meshed models using the Realizable turbulence model to obtain simulation data.

[0075] The steps for using the Realizable turbulence model are as follows:

[0076] Import the meshed orifice plate flowmeter model into the FLUENT software, and use the Scale option in the General tab to change the model unit to meters;

[0077] Set the turbulence model and wall functions in the Model option;

[0078] Define the flowing working medium as water in the Material tab;

[0079] Define the boundary conditions in the Boundary Condition tab;

[0080] Set the calculation method in the Solution Methods tab;

[0081] Set the convergence residuals in the Monitors tab;

[0082] In the Solution Initialization tab, select Absolute under Standard Initialization, input the initial parameters, and then click the Initialize option to complete the initialization;

[0083] Set the save steps and save locations in sequence in the Calculation Activities option;

[0084] Set the number of calculation steps in the Run Calculation tab and then click the Calculation option to start the calculation, and finally obtain simulation data for different working conditions.

[0085] Open the simulation data with CFD-POST software, and extract the flow rate through the perforated plate, the total pressure at 1 pipe diameter in front of the perforated plate, the total pressure at 6 pipe diameters behind the perforated plate, and the pressures at the pressure tapping points in front of and behind the perforated plate for each working condition in Expressions. Finally, obtain the pressure loss and discharge coefficient of the orifice plate flowmeter under different working conditions.

[0086] Finally, determine a high-performance orifice plate flowmeter based on the pressure loss and discharge coefficient of orifice plate flowmeters with different structures obtained from numerical simulations under different working conditions.

[0087] The simulation results show that:

[0088] The pressure losses of orifice plate flowmeters with different numbers of peripheral small holes are not significantly different. Considering the processing cost savings, select the number of peripheral small holes n = 4;

[0089] When the orifice diameter ratio β = 0.6, as the central orifice diameter increases, the flow measurement of the orifice plate flowmeter becomes more unstable. After comprehensively considering the pressure loss and flow measurement stability, select the central orifice diameter d1 = 0.1D;

[0090] When the orifice diameter ratio β = 0.6, as the pitch circle radius of the centers of the peripheral small holes decreases, the pressure difference fluctuation before and after the orifice plate flowmeter becomes larger, and the flow measurement becomes more unstable. To ensure the flow measurement stability, select the pitch circle radius of the centers of the peripheral small holes r = 0.32D;

[0091] Based on the above results, when the orifice diameter ratio β = 0.6, the high-performance orifice plate structure is: the number of holes n = 4, the central orifice diameter d1 = 0.1D, and the pitch circle radius of the centers of the peripheral small holes r = 0.32D;

[0092] When the orifice diameter ratio β changes, the structural parameters of the high-performance orifice plate flowmeter should change accordingly, as shown in Table 1.

[0093] Furthermore, when the orifice diameter ratio β = 0.6, the central orifice diameter d1 = 0.1D, and the pitch circle radius of the centers of the peripheral small holes r = 0.32D, the numerical simulation results of orifice plate flowmeters with different numbers of peripheral small holes at different flow rates are shown in Table 2;

[0094] Table 2: Numerical simulation of orifice plate flowmeters with different numbers of peripheral small holes at different flow rates

[0095]

[0096] It can be seen that the errors of the pressure loss and discharge coefficient of the orifice plate flowmeter under different numbers of holes (based on the discharge coefficient at a flow rate of 141.1 kg / s) are not significantly different. Since the more holes there are, the higher the processing cost, finally select the number of holes n = 4.

[0097] Furthermore, when the aperture ratio β = 0.6 and the radius of the pitch circle of the centers of the peripheral small holes r = 0.32D, the numerical simulation results for different central aperture diameters d1 are shown in Table 3 as follows:

[0098] Table 3: Numerical simulation results for different central aperture diameters d1

[0099]

[0100] It can be seen that as the central aperture diameter increases, both the differential pressure and pressure loss at the pressure tapping points of the orifice plate flowmeter decrease, but the discharge coefficient and flow measurement error increase. And the numerical simulation results show that as the central aperture diameter increases, the pressure fluctuation at the pressure tapping point behind the orifice plate also increases, that is, the stability of flow measurement becomes worse, as Figure 6 shown.

[0101] Furthermore, when the aperture ratio β = 0.6 and the central aperture diameter d1 = 0.1D, the numerical simulation results for different radii r of the pitch circle of the centers of the peripheral small holes are shown in Table 4;

[0102] Table 4: Numerical simulation results for different radii r of the pitch circle of the centers of the peripheral small holes

[0103]

[0104]

[0105] It can be seen that as the radius of the pitch circle of the centers of the peripheral small holes decreases, the pressure loss of the orifice plate flowmeter decreases; except that the flow measurement error is relatively large when the radius of the pitch circle of the centers of the peripheral small holes r = 0.25D, the flow measurement errors in other working conditions are relatively small. But the numerical simulation results show that after the radius of the pitch circle of the centers of the peripheral small holes decreases, the pressure fluctuation at the pressure tapping point behind the orifice plate flowmeter also increases, that is, the stability of flow measurement becomes worse, as Figure 7 shown.

[0106] Furthermore, the simulation calculation results of orifice plates with different aperture ratios are shown in Table 5;

[0107] Table 5: Simulation calculation results of orifice plates with different aperture ratios

[0108]

[0109]

[0110] Judging from the simulation calculation process, for the orifice plate flowmeters with the two structures of aperture ratio β = 0.5, r = 0.267D and aperture ratio β = 0.4, r = 0.32D, large fluctuations will occur in the differential pressure between the pressure tapping holes before and after the orifice plate. Therefore, they are not suitable for practical flow measurement, as Figure 7As shown. The pressure differences at the pressure tapping points before and after the rest of the structural orifice plates are very stable. Therefore, different methods should be adopted for the orifice plates with orifice ratio β = 0.5 and orifice ratio β = 0.4 in terms of the radius of the pitch circle of the peripheral small holes.

[0111] Example 3, referring to Figures 1-8 , which is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that superheated steam is used as the working medium, and steady-state numerical simulations of the high-performance orifice plate flowmeter under different working conditions are carried out to obtain simulation data. The simulation steps are to define the flowing working medium as superheated steam in the Material tab, and the remaining steps are the same as the simulation process with water as the working medium.

[0112] Furthermore, under the superheated steam working medium, when the orifice ratio β = 0.6, the central orifice diameter d1 = 0.1D, and the radius of the pitch circle of the peripheral small holes r = 0.32D, the numerical simulation results at different flow rates are shown in Table 6:

[0113] Table 6: Numerical simulation results at different flow rates

[0114]

[0115]

[0116] It can be seen that the correction factors of the orifice plate flowmeters under different working conditions are all very little different from 0.998. Therefore, finally, the correction factor of the orifice plate expansion coefficient is taken as 0.998, that is, the expansion coefficient εm of the orifice plate flowmeter is 0.998 times the expansion coefficient ε of the single orifice plate flowmeter, εm = 0.998ε

[0117] Furthermore, with water as the working medium, steady-state numerical simulations of the high-performance orifice plate flowmeter with elbows before and after are carried out to obtain simulation data.

[0118] Among them, when the orifice ratio β = 0.6, the central orifice diameter d1 = 0.1D, and the radius of the pitch circle of the peripheral small holes r = 0.32D, the simulation calculation results under different working conditions with elbows before and after the orifice plate flowmeter are shown in Table 7:

[0119] Table 7: Simulation calculation results under different working conditions with elbows before and after the orifice plate flowmeter

[0120]

[0121] It can be seen that by ensuring 4D straight pipe sections before the orifice plate flowmeter and 2D straight pipe sections after the orifice plate, the influence of the elbows on the flow measurement of the orifice plate flowmeter can be eliminated. Therefore, to ensure the measurement accuracy of the orifice plate flowmeter, there should be at least 4 times the pipe diameter of straight pipe sections before the orifice plate, and at least 2 times the pipe diameter of straight pipe sections after the orifice plate.

[0122] The remaining structure is the same as that of Embodiment 2.

[0123] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, color, orientation changes, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any clause of "means-plus-function" is intended to cover the structure that performs the recited function herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0124] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described (i.e., those features that are not relevant to the currently contemplated best mode of carrying out the present invention, or those features that are not relevant to implementing the present invention).

[0125] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. A high performance porous plate flow meter, characterized in that: It comprises a porous plate body (100), and its specific parameters are as follows: the number of peripheral small holes n=4; the central hole diameter d1=0.1D, the radius of the central pitch circle of the peripheral small holes r=0.32D; the diameter of the pressure taking hole dq=0.03D, the front pressure taking hole distance L1=25.4mm; the rear pressure taking hole distance L2=25.4mm; wherein D is the inner diameter of the pipeline.

2. The high performance porous plate flow meter according to claim 1, characterized in that: The value range of the pressure hole diameter dq is 3 to 13 mm.

3. The high performance porous plate flow meter according to claim 1 or 2, characterized in that: The pressure taking method of the porous plate body (100) is flange pressure taking; the porous plate body (100) is made of stainless steel.

4. The high performance porous plate flow meter according to claim 1, characterized in that: The required length of the front straight pipe section is 4 times the pipe diameter, and the required length of the rear straight pipe section is 2 times the pipe diameter.

5. A high-performance porous plate flowmeter verification method, used to verify the high-performance porous plate flowmeter described in any one of claims 1 to 4, characterized in that: include; Design and establish porous plate structure models with different structures; The porous plate flowmeter models with different structures were imported into the meshing software ICEM, the models were meshed using block structured meshes, and the meshes near the wall were encrypted; Taking water as the working fluid, the meshed model is used to perform steady numerical simulations of different working conditions using the Realizable turbulence model to obtain simulation data.

6. The high performance porous plate flow meter verification method according to claim 5, characterized in that: The steps to use the Realizable turbulence model are as follows: Import the meshed porous plate flowmeter model into the FLUENT software, and use the Scale option in the General tab to change the model unit to meters; Set the turbulence model and wall function in the Model option; In the Material tab, define the flowing medium as water; Define boundary conditions in the Boundary Condition tab; Set the calculation method in the Solution Methods tab; Set the convergence residual in the Monitors tab; In the SolutionInitialization tab, select Absolute under StandardInitialization, enter the initial parameters, and click the Initialize option to complete the initialization; In the CalculationActivities option, set the number of steps to be saved and the save location in turn; After setting the number of calculation steps in the Run Calculation tab, click the Calculation option to start the calculation, and finally obtain simulation data of different working conditions.

7. The high performance porous plate flow meter verification method according to claim 6, characterized in that: The simulation data was opened with CFD-POST software, and the flow rate through the porous plate, the total pressure at 1 times the pipe diameter in front of the porous plate, the total pressure at 6 times the pipe diameter behind the porous plate, and the pressure at the pressure points before and after the porous plate were extracted in Expressions for each working condition. Finally, the pressure loss and outflow coefficient of the porous plate flowmeter under different working conditions were obtained.

8. The high performance porous plate flow meter verification method according to claim 7, characterized in that: According to the pressure loss and outflow coefficient of porous plate flowmeters with different structures under different working conditions obtained by numerical simulation, a high-performance porous plate flowmeter is determined.

9. The high performance porous plate flow meter verification method according to any one of claims 6 to 8, characterized in that: Taking superheated steam as the working fluid, the high-performance porous plate flowmeter is numerically simulated under different working conditions to obtain simulation data.

10. The high performance porous plate flow meter verification method according to claim 9, characterized in that: Taking water as the working fluid, the high-performance porous plate flowmeter with front and rear elbows and different working conditions was simulated constantly to obtain simulation data.

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