Flow field simulation analysis method, device and equipment for flow regulator

Abstract

The invention discloses a flow field simulation analysis method, device and equipment for a flow regulator, relates to the technical field of liquid rocket engines, and aims to solve the problem of low simulation efficiency of the flow regulator in a simulation calculation process in the prior art. The method comprises the following steps: establishing a three-dimensional geometric topology model for the flow regulator in the liquid rocket engine; the three-dimensional geometric topology model at least comprises a flow channel and a valve element; carrying out grid division on the flow channel to obtain a flow channel grid; the valve element is subjected to grid division, and valve element grids are obtained; the runner grids and the valve core grids are static grids; and carrying out superposition processing and grid constraint setting operation on the runner grid and the valve element grid, and carrying out three-dimensional flow field simulation calculation on the flow regulator based on a turbulence model to obtain simulation results under different working conditions. Simulation results obtained under different working conditions can be subjected to order reduction, the problem that in the simulation process of the flow regulator, a simulation model obtained by using a dynamic grid cannot be subjected to order reduction is solved, and the simulation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid rocket engines, and in particular to a flow field simulation analysis method, device and equipment for a flow regulator. Background Art

[0002] During the digital test of liquid rocket engines, digital twin technology is often used to simulate the core components of liquid rocket engines, one of which is the flow regulator.

[0003] When performing CFD simulation on the flow regulator during the digital test of a liquid rocket engine, the flow regulator requires two hours under traditional CFD finite element simulation of a single working condition. The digital test of a liquid rocket engine requires a rate of, for example, 10 frames per second, which means that the simulation of the flow regulator takes a maximum of 0.1 seconds for a single working condition. Therefore, it is necessary to use order reduction technology to solve the real-time problem.

[0004] The flow regulator is a component with a moving internal slide valve. A dynamic mesh is required to simulate the flow regulator using Fluent simulation team building. However, the dynamic mesh simulation model cannot be reduced in order, resulting in the inability to train a reduced-order model. This makes it impossible to achieve the high-speed requirements of digital testing of liquid rocket engines. Therefore, it is necessary to improve the simulation efficiency of the flow regulator in the simulation calculation process. Summary of the Invention

[0005] The object of the present invention is to provide a flow field simulation analysis method, device and equipment for a flow regulator, so as to improve the simulation efficiency of the flow regulator in the simulation calculation process.

[0006] In order to achieve the above objectives, the present invention provides a flow field simulation analysis method, device and equipment for a flow regulator, as follows:

[0007] In a first aspect, the present invention provides a flow field simulation analysis method for a flow regulator, comprising:

[0008] Establishing a three-dimensional geometric topological model for a flow regulator in a liquid rocket engine; the three-dimensional geometric topological model at least includes a flow channel and a valve core;

[0009] Meshing the flow channel to obtain a flow channel grid;

[0010] Meshing the valve core to obtain a valve core mesh; the flow channel mesh and the valve core mesh are both static meshes;

[0011] The flow channel grid and the valve core grid are superimposed and grid constraint setting operations are performed, and a three-dimensional flow field simulation calculation is performed on the flow regulator based on a turbulence model to obtain simulation results under different working conditions.

[0012] Optionally, performing three-dimensional flow field simulation calculation on the flow regulator based on a turbulence model includes:

[0013] When the turbulence model is adopted, the valve core is set as an immersed solid, the valve core opening is adjusted by axially moving the valve core, and the velocity field and pressure field of the flow regulator at different valve core openings are calculated.

[0014] Optionally, the superimposing the flow channel grid and the valve core grid includes:

[0015] Based on the position of the valve core in the flow channel, selecting a plurality of target points on the edge of the valve core in the flow channel grid;

[0016] Based on the multiple target coordinates, select multiple corresponding target points on the edge of the valve core in the valve core grid;

[0017] The corresponding multiple target points in the valve core grid are overlapped with the multiple target points in the flow channel grid to complete the superposition process.

[0018] Optionally, performing a grid constraint setting operation on the flow channel grid and the valve core grid includes:

[0019] Set the grid topology distribution to be fixed;

[0020] Set the number of grid cells and the grid node fixation.

[0021] Optionally, the meshing the flow channel to obtain a flow channel mesh includes:

[0022] determining a boundary line, a grid density, and a number of grids of the flow channel;

[0023] The portion within the boundary line is segmented based on the grid density and the number of grids with the boundary line as a reference to obtain the flow channel grid.

[0024] Optionally, the turbulence model adopts a Realizable k-ε model.

[0025] Optionally, the flow field simulation analysis method of the flow regulator further includes:

[0026] Setting the working fluid in the flow channel to be room temperature kerosene;

[0027] Set the solver type to finite volume method.

[0028] Optionally, the flow field simulation analysis method of the flow regulator further includes:

[0029] Extracting a plurality of parameters to be analyzed from the simulation results to evaluate the performance of the flow regulator; the plurality of parameters to be analyzed include at least pressure drop, flow rate, velocity distribution, and vortex structure;

[0030] Alternatively, reducing the order of the simulation results under the different working conditions;

[0031] Alternatively, the three-dimensional flow field of the flow regulator at different valve core openings is visualized.

[0032] Compared with the prior art, the present invention provides a flow field simulation and analysis method for a flow regulator, which establishes a three-dimensional geometric topological model for the flow regulator in a liquid rocket engine, and meshes the flow channel and valve core respectively, and both the flow channel mesh and the valve core mesh are static meshes, and then the flow channel mesh and the valve core mesh are superimposed and mesh constraint set, and the three-dimensional flow field simulation calculation of the flow regulator is performed based on the turbulence model to obtain simulation results under different working conditions. This solves the problem that the simulation model obtained by using a dynamic mesh during the simulation process of the flow regulator cannot be reduced in order, thereby improving the simulation efficiency of the flow regulator in the simulation calculation process.

[0033] In a second aspect, the present invention provides a flow field simulation and analysis device for a flow regulator, comprising:

[0034] A modeling module, configured to establish a three-dimensional geometric topology model of a flow regulator in a liquid rocket engine; the three-dimensional geometric topology model at least includes a flow channel and a valve core;

[0035] A first division module is used to divide the flow channel into grids to obtain a flow channel grid;

[0036] A second division module is used to divide the valve core into grids to obtain a valve core grid; the flow channel grid and the valve core grid are both static grids;

[0037] The simulation module is used to perform superposition processing and grid constraint setting operations on the flow channel grid and the valve core grid, and perform three-dimensional flow field simulation calculation on the flow regulator based on the turbulence model to obtain simulation results under different working conditions.

[0038] In a third aspect, the present invention provides an electronic device comprising: a processor, a communication interface, a memory and a communication bus; wherein the processor, the communication interface and the memory communicate via the communication bus; the memory stores a computer program that can be run by the processor; when the processor runs the computer program, it executes the flow field simulation analysis method of the flow regulator described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0040] Figure 1 A schematic flow chart of a flow field simulation analysis method for a flow regulator provided in one embodiment of the present invention;

[0041] Figure 2 A schematic diagram of a geometric model of a flow regulator provided in accordance with an embodiment of the present invention;

[0042] Figure 3 A schematic structural diagram of an apparatus provided in accordance with an embodiment of the present invention;

[0043] Figure 4 A schematic structural diagram of an electronic device provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0044] To facilitate a clear description of the technical solutions of the embodiments of the present invention, the words "first" and "second" are used in the embodiments of the present invention to distinguish between identical or similar items with substantially the same functions and effects. For example, the first threshold and the second threshold are merely used to distinguish between different thresholds and do not limit their order. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or execution order, and the words "first" and "second" do not necessarily mean different.

[0045] It should be noted that, in the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present invention should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0046] In the present invention, "at least one" means one or more, "more than one" means two or more, and "and / or" describes the association relationship between associated objects, indicating that three types of relationships can exist.

[0047] like Figure 1 As shown, an embodiment of the present invention provides a flow field simulation analysis method for a flow regulator, which may include:

[0048] Step 110: Establishing a three-dimensional geometric topology model for the flow regulator in the liquid rocket engine; the three-dimensional geometric topology model at least includes a flow channel and a valve core;

[0049] When performing 3D modeling on the flow regulator, the available modeling software can be any one of a variety of 3D simulation software such as ANSYS ICEM, Creo (i.e. Pro / E), UG, CATIA, etc. to achieve the construction of the flow regulator shape. The 3D modeling result is as follows Figure 2 The valve core, opening, and flow channel inner wall in the 3D geometric topology model are shown.

[0050] Preferably, the modeling software in the embodiment of the present invention is CFX simulation software under ANSYS.

[0051] Step 120: Meshing the flow channel to obtain a flow channel mesh;

[0052] Step 130: Meshing the valve core to obtain a valve core mesh; both the flow channel mesh and the valve core mesh are static meshes;

[0053] In the implementation of the present invention, for the flow regulator, it is necessary to perform grid division on the flow channel and the valve core respectively.

[0054] Step 120 may specifically include: determining the boundary line, mesh density, and number of meshes of the flow channel; and segmenting the portion within the boundary line based on the mesh density and number of meshes, taking the boundary line as a reference, to obtain the flow channel mesh.

[0055] Step 130 may specifically include: determining the boundary line, grid density and number of grids of the valve core; taking the boundary line of the valve core as a reference, dividing the part within the boundary line of the valve core based on the grid density and number of valve core grids to obtain the valve core grid.

[0056] Specifically, the number of grids is selected to ensure that the calculation requirements are met while saving calculation time as much as possible.

[0057] For example, the mesh count for a flow channel could be three million.

[0058] For example, the number of meshes for a spool can be one hundred thousand.

[0059] Step 140: superimpose the flow channel grid and the valve core grid and set grid constraints, and perform three-dimensional flow field simulation calculations on the flow regulator based on the turbulence model to obtain simulation results under different working conditions.

[0060] Optionally, the grid constraint setting operation may include: setting the grid topology distribution to be fixed, setting the number of grid cells and grid nodes to be fixed, and setting the valve core opening to change without affecting the network topology distribution or the number of grid cells. The above grid constraint setting operations are designed to meet the data fitting requirements for the flow regulator 3D feature model training.

[0061] Optionally, the flow channel grid and the valve core grid are superimposed, which may include:

[0062] Based on the position of the valve core in the flow channel, multiple target points are selected on the edge of the valve core in the flow channel grid;

[0063] Based on the multiple target coordinates, multiple corresponding target points are selected on the edge of the valve core in the valve core grid;

[0064] The corresponding multiple target points in the valve core grid are overlapped with the multiple target points in the flow channel grid to complete the superposition processing.

[0065] It is understandable that when performing flow field simulation analysis on the flow regulator, it is also necessary to set the working fluid in the flow channel to room temperature kerosene; and set the solver type to the finite volume method.

[0066] Optionally, the turbulence model uses the Realizable k-ε model. The reason for using the Realizable k-ε model is that the k-ε model has extremely wide adaptability. First, it is used to solve the turbulent kinetic energy equation and the turbulent dissipation rate equation to obtain the values of k and ε, and then the Boussinesq assumption is used to obtain the solution of the Reynolds stress. It is very efficient for relatively uniform turbulent flows. The characteristics of high stability and high computational accuracy are also the characteristics of adding multiple improved forms such as the RNG k-ε model and the Realizable k-ε model to adapt to more subdivided fields. Among them, the Realizable k-ε model updates the calculation formula of turbulent viscosity and derives the ε equation based on the exact transport equation of the root mean square of the vorticity disturbance. Therefore, it achieves higher accuracy in Reynolds stress, which will help to solve and calculate rotational flow calculations and boundary layer calculations.

[0067] From the above, it can be seen that the present invention provides a flow field simulation and analysis method for a flow regulator. By establishing a three-dimensional geometric topological model of the flow regulator in a liquid rocket engine, and meshing the flow channel and valve core respectively, and both the flow channel grid and the valve core grid are static grids, the flow channel grid and the valve core grid are then superimposed and mesh constraint setting operations are performed on the flow channel grid and the valve core grid, and a three-dimensional flow field simulation calculation of the flow regulator is performed based on a turbulence model to obtain simulation results under different working conditions. Since both the flow channel grid and the valve core grid are static grids, the simulation results under different working conditions obtained in this way can complete subsequent order reduction. The reason for completing subsequent order reduction is that if the consistency of the grid is ensured during the three-dimensional order reduction process, the effectiveness and accuracy of the reduced order model can be improved. Since the reduced order model removes unimportant or redundant information in the model and retains the main features and dynamic behavior of the model, the computational complexity is reduced and the simulation efficiency is improved. In this process, the consistency of the grid ensures the structural similarity between the reduced order model and the original model, which is of great significance for maintaining the physical properties of the model and the accuracy of the simulation results. When the flow regulator is simulated using a reduced-order model, the simulation speed is faster. In this way, the solution in the embodiment of the present invention solves the problem that the flow regulator uses a dynamic grid during the simulation process, resulting in the inability to reduce the order of the obtained simulation model, thereby improving the simulation efficiency of the flow regulator in the simulation calculation process.

[0068] Optionally, a three-dimensional flow field simulation calculation is performed on the flow regulator based on a turbulence model, including:

[0069] When the turbulence model is adopted, the valve core is set as an immersed solid, and the valve core opening is adjusted by axially moving the valve core. The velocity field and pressure field of the flow regulator at different valve core openings are calculated.

[0070] It is understood that the valve core can be configured as an immersed solid using the Immersed Fixation method within the CFX simulation software. This method is an additional FSI feature within the ANSYS CFX simulation software. Because this method avoids mesh deformation and re-meshing, it can simulate the unrestricted motion of solids within the fluid domain. When the immersed solid moves within the fluid domain, the flow field solution in the overlapping region is adjusted to reflect the presence of the solid by applying appropriate source terms. The motion of the solid can be flexibly defined by the user or obtained using the rigid body solver within the CFX simulation software. Therefore, the flow regulator will be calculated based on the immersed solid method.

[0071] According to engineering requirements, typical working conditions that need to be simulated are selected, the valve core is moved axially to adjust the valve core opening, and the velocity field and pressure field of the flow regulator at different valve core openings are calculated. Then, field data are extracted from the velocity field and pressure field at different valve core openings. Machine learning can be used to fit the field data to obtain the required characteristic model for rapid simulation calculation of freely adjustable valve core openings, generate cloud maps of the velocity field and pressure field, and support the display of the engine virtual test process.

[0072] It should be noted that the flow field simulation analysis method of the flow regulator can also include some other steps:

[0073] For example, multiple parameters to be analyzed are extracted from the simulation results to evaluate the performance of the flow regulator; the multiple parameters to be analyzed include at least pressure drop, flow rate, velocity distribution, and vortex structure;

[0074] For example, after obtaining the simulation results, the simulation results under different working conditions are reduced in order;

[0075] For example, the three-dimensional flow field of a flow regulator at different valve core openings can be visualized.

[0076] For example, before simulation calculations, multiple parameters are set. These parameters cover simulation conditions, material properties, physical characteristics, and other aspects to ensure the accuracy and reliability of the simulation calculations:

[0077] (1) Simulation condition selection: determine the simulation conditions required for the simulation, including the working fluid type, flow rate range, and other operating conditions.

[0078] (2) Material property definition: According to the actual structure and material of the flow regulator, set the material physical parameters, such as density, viscosity, and elastic modulus. These parameters will affect the simulation of the flow field and the accuracy of the simulation results.

[0079] (3) Physical property settings: In this step, the physical properties of the fluid flow need to be specified, including the incompressibility and non-steady-state characteristics of the fluid. Characteristics such as turbulence and pressure drop also need to be considered.

[0080] (4) Boundary condition setting: In order to accurately simulate the performance of the flow regulator, boundary conditions must be defined, including the setting of inflow and outflow boundary conditions, as well as possible wall conditions and other physical property conditions.

[0081] (5) Selection of numerical methods: Select appropriate numerical methods to meet the accuracy and computational efficiency of the simulation.

[0082] (6) Grid independence test: Before simulation analysis, a grid independence test is required to ensure that the order of magnitude of the selected finite element grid units can guarantee the accuracy of the calculation and will not affect the accuracy of the results.

[0083] (7) Simulation parameter setting: determine the simulation time step, simulation time period, and related convergence standard parameters.

[0084] After completing the 3D simulation of the flow conditioner, you can post-process and analyze the results to obtain detailed information about the flow conditioner's performance. The following are the steps for post-processing the simulation analysis results:

[0085] 1) Visualization of flow field simulation results: Using professional simulation post-processing software, the three-dimensional flow field of the flow regulator at different slide valve positions is visualized, including velocity distribution, pressure distribution, and turbulence characteristics.

[0086] 2) Result data extraction: key performance parameters such as pressure drop, flow rate, velocity distribution, and vortex structure are extracted from the simulation results. These parameters are used to evaluate the performance of the flow regulator.

[0087] 3) Effect of spool position: Compare simulation results at different spool positions to understand the effect of spool position on flow field characteristics. This can help optimize the design and operation of the flow regulator.

[0088] 4) Turbulence model verification: the simulation results are verified and compared for the selected turbulence model to ensure the accuracy of the selected model in simulating actual flow behavior.

[0089] 5) Time step and convergence test: Verify whether the simulation produces stable results within an acceptable computing time for the selected time step and convergence criteria.

[0090] 6) Monitoring point data analysis: Based on the selected monitoring point data, analyze the changes in velocity field and pressure field under different working conditions to identify potential performance problems or improvement opportunities.

[0091] 7) Data constraints. According to the requirements of digital twin technology, simulation data needs to be restricted to ensure that parameters such as grid topology distribution, grid number, grid nodes and valve core opening will not have an adverse effect on the fitting and application of subsequent feature models.

[0092] The flow field simulation and analysis device of a flow regulator provided by the present invention is described below. The flow field simulation and analysis device of a flow regulator described below and the flow field simulation and analysis method of a flow regulator described above can be referred to each other.

[0093] like Figure 3 As shown, an embodiment of the present invention further provides a flow field simulation analysis device for a flow regulator, which is used to implement a flow field simulation analysis method for a flow regulator in any of the above embodiments. The device may include:

[0094] A modeling module 310 is configured to establish a three-dimensional geometric topology model of a flow regulator in a liquid rocket engine; the three-dimensional geometric topology model includes at least a flow channel and a valve core;

[0095] A first division module 320 is used to divide the flow channel into grids to obtain a flow channel grid;

[0096] The second division module 330 is used to divide the valve core into grids to obtain a valve core grid; the flow channel grid and the valve core grid are both static grids;

[0097] The simulation module 340 is used to perform superposition processing and grid constraint setting operations on the flow channel grid and the valve core grid, and perform three-dimensional flow field simulation calculations on the flow regulator based on the turbulence model to obtain simulation results under different working conditions.

[0098] In an optional implementation, the simulation module 340 is specifically configured to:

[0099] When the turbulence model is adopted, the valve core is set as an immersed solid, and the valve core opening is adjusted by axially moving the valve core. The velocity field and pressure field of the flow regulator at different valve core openings are calculated.

[0100] In an optional implementation, the simulation module 340 is specifically configured to:

[0101] Based on the position of the valve core in the flow channel, multiple target points are selected on the edge of the valve core in the flow channel grid;

[0102] Based on the multiple target coordinates, multiple corresponding target points are selected on the edge of the valve core in the valve core grid;

[0103] The corresponding multiple target points in the valve core grid are overlapped with the multiple target points in the flow channel grid to complete the superposition processing.

[0104] In an optional embodiment, the simulation module 340 is specifically configured to:

[0105] Set the grid topology distribution to be fixed;

[0106] Set the number of grid cells and the grid node fixation.

[0107] In an optional implementation, the first division module 320 is specifically configured to:

[0108] Determine the boundary line, mesh density and number of meshes of the flow channel;

[0109] Based on the boundary line, the part within the boundary line is divided based on the grid density and the number of grids to obtain the flow channel grid.

[0110] In an optional embodiment, the turbulence model adopts the Realizable k-ε model.

[0111] In an optional embodiment, the flow field simulation and analysis device of the flow regulator is further used to:

[0112] The working fluid in the flow channel is set to be kerosene at room temperature;

[0113] Set the solver type to finite volume method.

[0114] In an optional embodiment, the flow field simulation and analysis device of the flow regulator is further used to:

[0115] Extracting multiple parameters to be analyzed from the simulation results to evaluate the performance of the flow regulator; the multiple parameters to be analyzed include at least pressure drop, flow rate, velocity distribution, and vortex structure;

[0116] Alternatively, the simulation results under different working conditions can be reduced in order;

[0117] Alternatively, visualize the 3D flow field of a flow regulator at different valve openings.

[0118] like Figure 4 As shown, an embodiment of the present invention further provides an electronic device, which may include: a processor 410, a communication interface 420, a memory 430, and a communication bus. The processor 410, the communication interface 420, and the memory 430 communicate with each other via the communication bus. The memory 430 stores a computer program executable by the processor 410; when the processor 410 executes the computer program, it can execute the flow field simulation analysis method for a flow regulator in any of the above-mentioned embodiments.

[0119] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk, or an optical disk.

[0120] On the other hand, the present invention further provides a non-transitory computer-readable storage medium, in which instructions are stored. When the instructions are executed, the flow field simulation analysis method of the flow regulator in any of the above embodiments is implemented.

[0121] Although the present invention has been described herein in conjunction with various embodiments, in the process of implementing the claimed invention, those skilled in the art may understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0122] Although the present invention has been described with reference to specific features and embodiments thereof, it will be apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the invention. Accordingly, this specification and drawings are merely illustrative of the invention as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the invention. It will be apparent that various modifications and variations may be made to the present invention by those skilled in the art without departing from the spirit and scope of the invention. Thus, the present invention is intended to include such modifications and variations as fall within the scope of the claims of the present invention and their equivalents.

Claims

1. A flow field simulation analysis method for a flow regulator, characterized in that: include: Establishing a three-dimensional geometric topological model for a flow regulator in a liquid rocket engine; the three-dimensional geometric topological model at least includes a flow channel and a valve core; Meshing the flow channel to obtain a flow channel grid; Meshing the valve core to obtain a valve core mesh; the flow channel mesh and the valve core mesh are both static meshes; The flow channel grid and the valve core grid are superimposed and grid constraint setting operations are performed, and a three-dimensional flow field simulation calculation is performed on the flow regulator based on a turbulence model to obtain simulation results under different working conditions.

2. The flow field simulation analysis method of a flow regulator according to claim 1, characterized in that: The three-dimensional flow field simulation calculation of the flow regulator based on the turbulence model includes: When the turbulence model is adopted, the valve core is set as an immersed solid, the valve core opening is adjusted by axially moving the valve core, and the velocity field and pressure field of the flow regulator at different valve core openings are calculated.

3. The flow field simulation analysis method of a flow regulator according to claim 1, characterized in that: The superimposing process of the flow channel grid and the valve core grid includes: Based on the position of the valve core in the flow channel, selecting a plurality of target points on the edge of the valve core in the flow channel grid; Based on the multiple target coordinates, select multiple corresponding target points on the edge of the valve core in the valve core grid; The corresponding multiple target points in the valve core grid are overlapped with the multiple target points in the flow channel grid to complete the superposition process.

4. The flow field simulation analysis method of a flow regulator according to claim 1, characterized in that: Performing a grid constraint setting operation on the flow channel grid and the valve core grid includes: Set the grid topology distribution to be fixed; Set the number of grid cells and the grid node fixation.

5. The flow field simulation analysis method of a flow regulator according to claim 1, characterized in that: The meshing of the flow channel to obtain a flow channel mesh comprises: determining a boundary line, a grid density, and a number of grids of the flow channel; The portion within the boundary line is segmented based on the grid density and the number of grids with the boundary line as a reference to obtain the flow channel grid.

6. The flow field simulation analysis method of a flow regulator according to claim 1, characterized in that: The turbulence model adopts the Realizable k-ε model.

7. The flow field simulation analysis method of a flow regulator according to claim 1, characterized in that: Also includes: Setting the working fluid in the flow channel to be room temperature kerosene; Set the solver type to finite volume method.

8. The flow field simulation analysis method of a flow regulator according to claim 1, characterized in that: Also includes: extracting a plurality of parameters to be analyzed from the simulation results to evaluate the performance of the flow regulator; The plurality of parameters to be analyzed include at least pressure drop, flow rate, velocity distribution and vortex structure; Alternatively, reducing the order of the simulation results under the different working conditions; Alternatively, the three-dimensional flow field of the flow regulator at different valve core openings is visualized.

9. A flow field simulation and analysis device for a flow regulator, characterized in that: include: A modeling module, configured to establish a three-dimensional geometric topology model of a flow regulator in a liquid rocket engine; the three-dimensional geometric topology model at least includes a flow channel and a valve core; A first division module is used to divide the flow channel into grids to obtain a flow channel grid; A second division module is used to divide the valve core into grids to obtain a valve core grid; the flow channel grid and the valve core grid are both static grids; The simulation module is used to perform superposition processing and grid constraint setting operations on the flow channel grid and the valve core grid, and perform three-dimensional flow field simulation calculation on the flow regulator based on the turbulence model to obtain simulation results under different working conditions.

10. An electronic device, characterized in that: include: A processor, a communication interface, a memory, and a communication bus; wherein the processor, the communication interface, and the memory communicate via the communication bus; The memory stores a computer program that can be run by the processor; when the processor runs the computer program, it executes the flow field simulation analysis method of the flow regulator according to any one of claims 1 to 8.

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