Method for calculating blocking effect of towing tank of underwater vehicle

Abstract

The invention relates to the technical field of computational fluid mechanics, in particular to a method for calculating the blocking effect of an underwater vehicle towing tank, and the method comprises the steps: building an underwater vehicle physical model; defining each boundary condition of the CFD numerical calculation domain, and solving the total resistance and each resistance component of the underwater vehicle based on the calculation domain grid and the configured numerical calculation condition; and post-processing the total resistance and each resistance component to obtain a calculation numerical result of the underwater vehicle under different blocking ratio working conditions. According to the method, by verifying the independence of the grids, the appropriate number of the grids is determined, and the calculation precision and efficiency are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of computational fluid dynamics, and in particular to a method for calculating the blocking effect of an underwater vehicle towing pool. Background Art

[0002] Experimental research is an important means to design and verify the performance of underwater vehicles, and resistance test is a crucial part of it. For larger-scale models, scaled models are often used in the test, and then the test data obtained from the scaled model are converted to the actual model. If the experimental results of the scaled model have large errors, the errors will be magnified during the conversion, and further affect a series of performance indicators of the underwater vehicle, such as maximum speed, cruising speed, and mileage. The resistance test of underwater vehicles is usually carried out in a towing tank, but due to the existence of the tank boundary, the towing tank cannot be equivalent to the ideal flow field of the infinite domain. The resistance value obtained from the test is often greater than the resistance value of the infinite water area. This phenomenon is called the blocking effect. This is caused by the increase in the average flow velocity of water relative to the ship model due to the restriction of the model flow around the bottom and wall of the pool. The blocking effect is related to factors such as the blocking ratio and the speed of movement. The blocking ratio refers to the ratio of the cross-sectional area of ​​the test object to the cross-sectional area of ​​the test section of the pool (or water cylinder, or wind tunnel). With the advancement of computing technology and the enhancement of computer performance, numerical simulation technology has become increasingly important in studying the blocking effect. By applying appropriate numerical techniques and physical models, numerical simulation can reproduce complex physical phenomena and deeply analyze the behavioral characteristics of the system. This method provides precise control of experimental conditions, ensures the safety of research, reduces costs, and can simulate situations of different scales and involving multiple physical processes, providing accurate numerical predictions and decision support for solving engineering and scientific problems.

[0003] With the development of underwater vehicles in large scale and high speed, the model size and test speed are expanding synchronously. The blocking effect has become an increasingly important factor. Therefore, it is of practical value to study its influence on the calculation of the hydrodynamic coefficients of underwater vehicles. As a representative of long-range, low-noise and high lift-to-drag ratio underwater vehicles, gyroscopic underwater vehicles have also been widely studied. It can conduct long-term and large-scale reconnaissance and detection of complex marine environments, and plays an important role in the global ocean observation and observation system. It has the advantages of long endurance and good concealment. However, most researchers study the influence of blocking effect on ships sailing in restricted waters, and there is little research on the blocking effect of gyroscopic underwater vehicles in towing tanks based on simulation, which leads to the lack of good reference materials when correcting the towing tank experiments affected by blocking effect. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method for calculating the blocking effect of an underwater vehicle towing tank. The present invention estimates the drag coefficient of a rotating body underwater vehicle, and calculates the drag coefficient of the underwater vehicle under different blocking ratios in an infinite domain and a finite domain. By analyzing the resistance results, velocity distribution, and pressure distribution, the action law of the blocking effect is given, and the results have a certain reference value for correcting the towing tank test affected by the blocking effect, and also have a certain practical value for improving the accuracy of the underwater vehicle drag coefficient.

[0005] The first object of the present invention is to provide a method for calculating the blocking effect of an underwater vehicle towing tank, comprising: Establish physical model of underwater vehicle; Import the underwater vehicle physical model into the CFD numerical calculation software, set the motion coordinate system of the underwater vehicle, and establish the calculation domain; Define the boundary conditions of the CFD numerical calculation domain and mesh the geometric model of the calculation domain; configure the numerical calculation conditions of the underwater vehicle under different blocking ratio conditions, and set the CFD numerical solution model to solve the total resistance and resistance components of the underwater vehicle based on the calculation domain mesh and the configured numerical calculation conditions; The total resistance and each resistance component are post-processed to obtain the numerical results of the underwater vehicle under different blocking ratio conditions.

[0006] Preferably, the setting of the motion coordinate system of the underwater vehicle includes: Set up the geodetic coordinate system for describing the motion and attitude of the underwater vehicle numerical simulation results; The motion coordinate system of the underwater vehicle is obtained based on the center of the physical model. The origin of the coordinate system is at the head, and the test model moves in the opposite direction of the x-axis.

[0007] Preferably, the computational domain is established according to a geodetic coordinate system, including a finite domain and an infinite domain.

[0008] Preferably, the boundary conditions of the CFD numerical calculation domain are defined, including: In the infinite domain, the inlet, side, top and bottom are all set as velocity inlets, the outlet is set as zero relative pressure, and except for the outlet and inlet, the remaining boundaries are kept 5 times the characteristic length from the model and are set as symmetry planes; In the finite domain, the distance between the head of the model and the front inlet is 1.5L, and the distance between the rear outlet and the tail of the model is 3.5L. The depth of the computational domain is the same as that of the actual towing tank, where L is the total length of the model; The surface of the model, the side walls and the bottom of the computational domain are specified as no-slip walls.

[0009] Preferably, a CFD numerical solution model is set, including the incompressible Reynolds-averaged Navier-Stokes equations and the Realizable - Model.

[0010] Preferably, during the solution process, the numerical discretization adopts a second-order upwind scheme and the solution is obtained by a coupling method.

[0011] Preferably, the physical model of the underwater vehicle is established by collecting geometrical dimension data of the underwater vehicle and using three-dimensional modeling software according to the geometrical dimension data of the underwater vehicle.

[0012] The second object of the present invention is to provide a system for calculating the blocking effect of an underwater vehicle towing tank, comprising: The model import module is used to establish the physical model of the underwater vehicle; the physical model of the underwater vehicle is imported into the CFD numerical calculation software, the motion coordinate system of the underwater vehicle is set, and the calculation domain is established; The numerical calculation module is used to define the boundary conditions of the CFD numerical calculation domain and to mesh the geometric model of the calculation domain; configure the numerical calculation conditions of the underwater vehicle under different blocking ratio conditions, and set the CFD numerical solution model to solve the total resistance and various resistance components of the underwater vehicle based on the calculation domain mesh and the configured numerical calculation conditions; The result export module is used to post-process the total resistance and each resistance component to obtain the calculated numerical results of the underwater vehicle under different blocking ratio conditions.

[0013] The third object of the present invention is to provide an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the above method when executed by the processor.

[0014] A fourth object of the present invention is to provide a storage medium having a computer program stored thereon, which is used to execute the steps of the above method when the computer program is executed.

[0015] The present invention has at least the following beneficial effects: The present invention provides a method for calculating the blocking effect of an underwater vehicle towing pool. The method is based on CFD numerical calculation software, and by configuring numerical calculation conditions of the underwater vehicle under different blocking ratio conditions, and setting a CFD numerical solution model, the total resistance and each resistance component of the underwater vehicle based on the calculation domain grid and the configured numerical calculation conditions are solved; the total resistance and each resistance component are post-processed to obtain the calculation numerical results of ARBUV under different blocking ratio conditions. The present invention is relatively efficient and accurate, and has strong practical applicability.

[0016] The present invention adopts the incompressible Reynolds-averaged Navier-Stokes (NS) equations, which has the characteristics of wide application range, low cost and reasonable accuracy. The present invention uses fluid simulation software to discretize the RANS equations, adopts a second-order upwind format, and uses a coupling method to solve, which can better handle the discrete errors in the calculation process. The present invention verifies the independence of the grid and determines the appropriate number of grids to ensure the calculation accuracy and efficiency. The present invention is compared with the experimental results to verify the accuracy of the numerical method, and the error is less than 5%, indicating that the numerical method can better estimate the actual resistance solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention provides a flow chart of a method for calculating the blocking effect of an underwater vehicle towing tank.

[0018] Figure 2 It is a schematic diagram of the ARBUV physical model parameters of the present invention.

[0019] Figure 3 Schematic diagram of the boundary conditions of the ARBUV of the present invention.

[0020] Figure 4 Schematic diagram of the surface mesh division of ARBUV of the present invention.

[0021] Figure 5 It is a schematic diagram of the ARBUV velocity flow field of the present invention. DETAILED DESCRIPTION

[0022] In order to illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following is a detailed description in conjunction with embodiments.

[0023] The present invention estimates the drag coefficient of a rotating body underwater vehicle, and calculates the drag coefficient of the underwater vehicle under different blocking ratios in infinite domain and finite domain respectively. By analyzing the resistance results, velocity distribution, and pressure distribution, the action law of the blocking effect is given, and the results have a certain reference value for correcting the towing tank test affected by the blocking effect, and also have a certain practical value for improving the accuracy of the drag coefficient of the underwater vehicle.

[0024] The present invention provides a method for calculating the blocking effect of an underwater vehicle towing pool, comprising: Establish physical model of underwater vehicle; The physical model of the underwater vehicle is established by collecting the geometric dimension data of the underwater vehicle and using three-dimensional modeling software according to the geometric dimension data of the underwater vehicle.

[0025] Import the underwater vehicle physical model into the CFD numerical calculation software, set the motion coordinate system of the underwater vehicle, and establish the calculation domain; The setting of the motion coordinate system of the underwater vehicle includes: Set up the geodetic coordinate system for describing the motion and attitude of the underwater vehicle numerical simulation results; The motion coordinate system of the underwater vehicle is obtained based on the center of the physical model. The origin of the coordinate system is at the head, and the test model moves in the opposite direction of the x-axis.

[0026] The computational domain is established according to the geodetic coordinate system, and includes a finite domain and an infinite domain.

[0027] Define the boundary conditions of the CFD numerical calculation domain and mesh the geometric model of the calculation domain; configure the numerical calculation conditions of the underwater vehicle under different blocking ratio conditions, and set the CFD numerical solution model to solve the total resistance and resistance components of the underwater vehicle based on the calculation domain mesh and the configured numerical calculation conditions; Define the boundary conditions of the CFD numerical calculation domain, including: In the infinite domain, the inlet, side, top and bottom are all set as velocity inlets, the outlet is set as zero relative pressure, and except for the outlet and inlet, the remaining boundaries are kept 5 times the characteristic length from the model and are set as symmetry planes; In the finite domain, the distance between the head of the model and the front inlet is 1.5L, and the distance between the rear outlet and the tail of the model is 3.5L. The depth of the computational domain is the same as that of the actual towing tank, where L is the total length of the model; The surface of the model, the side walls and the bottom of the computational domain are specified as no-slip walls.

[0028] Set up the CFD numerical solution model, including the incompressible Reynolds-averaged Navier-Stokes equations and the combined Realizable - Model.

[0029] During the solution process, the numerical discretization adopts the second-order upwind scheme and the coupling method is used to solve.

[0030] The total resistance and each resistance component are post-processed to obtain the numerical results of the underwater vehicle under different blocking ratio conditions.

[0031] In order to illustrate the method for calculating the blocking effect of an underwater vehicle towing pool provided by the present invention, a description is given in conjunction with the accompanying drawings.

[0032] See also Figure 1 As shown, a method for calculating the blocking effect of an underwater vehicle towing pool includes the following steps: S1. Collect data of ARBUV (taking a rotating body underwater vehicle as an example) and establish a physical model based on the data of ARBUV; S101. Collect geometric dimension data of ARBUV by direct measurement and other methods.

[0033] S102. Use 3D modeling software to build an ARBUV physical model based on the ARBUV geometric dimension data. The model has a length of 2.8 m, and a width and height of 0.324 m. Figure 2 shown.

[0034] S2. Import the physical model of ARBUV into the CFD numerical calculation software. In order to make a clear comparison and meet the needs of actual engineering, the calculation domain includes two parts: finite domain and infinite domain. The finite domain refers to the area where the fluid flows with clear boundaries and its range is limited. The infinite domain refers to the area where the fluid flows without clear boundaries and its range is infinitely extended. Finally, establish the motion coordinate system of ARBUV respectively; S201, importing the physical model of ARBUV into the CFD numerical calculation software; specifically, importing the physical model of ARBUV established in S1 into the CFD numerical calculation software; S202, setting a geodetic coordinate system for describing the motion and attitude of numerical simulation results of ARBUV; obtaining its motion coordinate system based on the center of the physical model of ARBUV, with the origin of the coordinate system at the head, and the test model moving in the opposite direction of the x-axis.

[0035] S203, according to the geodetic coordinate system described in S202, establish the computational domains of the finite domain and the infinite domain respectively. The size of the infinite domain is 6 ×5 ×5 , the finite field size is 6 × × ,in represents the various widths of the computational domain used to evaluate various blocking ratios, It represents the height of the computational domain; the model head is 1.5L away from the front inlet, and the rear outlet is 3.5L away from the model tail. The surface of the model, the side walls and the bottom of the computational domain are defined as non-slip walls. For the "unblocked" computational fluid domain, except for the outlet and inlet, the remaining boundaries of the computational domain are kept 5 times the characteristic length from the model and set as symmetry surfaces, such as Figure 3 shown.

[0036] S3. Set boundary conditions and mesh the geometric model in the computational domain; configure the numerical calculation conditions of the underwater vehicle under different blocking ratio conditions, and then set the CFD numerical solution model to solve the total resistance and various resistance components of the underwater vehicle based on the computational domain mesh and the configured numerical calculation conditions, including friction resistance and pressure resistance.

[0037] It should be noted that the numerical calculation conditions for configuring the underwater vehicle under different blocking ratio conditions include: first, in the present invention, the blocking ratio is defined as the ratio of the width × height of the underwater vehicle to the width × depth of the calculation domain. In a finite domain, the purpose of changing the blocking ratio can be achieved by changing the width of the calculation domain. Here, the calculation domain widths of 0.58m, 4.66m, and 9.33m are selected as examples; that is, the blocking ratios are 3.0%, 0.375%, and 0.1875% respectively; in an infinite domain, because the calculation domain width is approximately infinite, the blocking ratio is 0%.

[0038] S301, set the calculation domain and boundary conditions: the calculation domain is a cuboid, and the entity is a full-size AUV model, which is located at the center of the cross section. According to the calculation conditions, set the boundary positions of the velocity inlet, pressure outlet and symmetry plane of the numerical calculation domain established in S2, and set the boundary conditions of the corresponding boundaries, and set the towing speed range to 1~7m / s.

[0039] In the infinite domain, the inlet, side, top and bottom are all set as velocity inlet, and the outlet is set as zero relative pressure. Except for the outlet and the inlet, the remaining boundaries are kept 5 times the characteristic length from the model and set as symmetry planes; in the finite domain, the head of the model is 1.5L away from the front inlet (L is the total length of the model), and the rear outlet is 3.5L away from the tail of the model. The depth of the computational domain is the same as that of the actual towing pool. The surface of the model, the side walls and the bottom of the computational domain are specified as no-slip walls.

[0040] S302, computational domain meshing, meshing is performed based on the established CFD numerical simulation computational domain, and meshing is performed around the ARBUV. The meshing diagram is shown in Figure 4 As shown. The iterative solution of the discrete grid will lead to discrete uncertainty in the numerical simulation process. In theory, a fine grid will lead to smaller errors and lower sensitivity, so it is necessary to verify the grid independence.

[0041] S303. Set the CFD numerical solution model, select single-phase flow according to the calculation conditions, and select the turbulence model Realizable k- The calculation is performed by fluid simulation software, the numerical discretization adopts the second-order upwind scheme, and the coupling method is used to solve.

[0042] Specific numerical method selection: Use the incompressible Reynolds-averaged Navier-Stokes (NS) equations for simulation To calculate, the specific equation expression is:

[0043] Where: Represented in Cartesian coordinate system ( i=1, 2, 3) direction, t Represents time, represents the component of the external body force in the direction, represents the density of the fluid, represents the time-averaged pressure, represents the dynamic viscosity, In Cartesian coordinate system ( i =1, 2, 3) directions, is the Reynolds stress tensor. A turbulence model is also needed to close the equations and solve this system of equations. Realizable - The model mathematically converts the eddy viscosity coefficient ( ) and turbulent kinetic energy k and turbulent kinetic energy dissipation rate Connect them together and establish turbulent kinetic energy k and turbulent energy dissipation rate The transport equations of the control system are finally closed.

[0044] exist Realizable - ε In the model, for k and ε The modeling transport equation is:

[0045] In the formula, represents the turbulent kinetic energy generation term due to the mean velocity gradient, is the term for the turbulent kinetic energy generated by buoyancy, represents the contribution of the pulsating expansion to the total dissipation rate in compressible turbulence, and is a constant. and They are k and The turbulent Prandtl number. and A user-defined source item.

[0046] The model has been extensively validated for a variety of flow situations including rotating uniform shear flow, free flow (such as jets and mixing layers), channel and boundary layer flows, and separated flows.

[0047] The calculation was performed using fluid simulation software, the numerical discretization was performed using the second-order upwind scheme, and the coupling method was used to solve the problem. The time step was 0.005s, and the continuity equation and momentum equation (within the range of 10-4) maintained the minimum residual, meeting the usual convergence criteria.

[0048] The second-order upwind scheme is a high-order format used for discretization of convection terms in CFD numerical calculations. It is introduced to overcome the inaccuracy of the first-order upwind scheme when the numerical solution oscillates. The second-order upwind scheme can obtain a more accurate solution and is absolutely stable. In the finite volume method, for the discretization of convection terms, the second-order upwind scheme can be expressed as: When the convection speed , use the formula: ; When the convection speed , use the formula: .

[0049] Here Represented at the grid point The flux at and Respectively expressed in The flux of the second grid point on the left and left of the point is similar. and represents the flux at the second grid point on the right and on the left.

[0050] The characteristic of the second-order upwind format is that it improves the discretization accuracy by using more grid point information while maintaining the upwind characteristics. This format is particularly useful in dealing with convection-diffusion problems dominated by convection, because it can effectively capture the characteristics of the convection term while reducing the oscillation and false diffusion of the numerical solution.

[0051] In practical applications, the second-order upwind scheme usually provides higher accuracy than the first-order upwind scheme, but the computational cost is relatively large. The first-order upwind scheme is still used in some cases due to its simple form and low computational cost. However, for complex flow problems that require high-precision solutions, the second-order upwind scheme is a more appropriate choice.

[0052] S304, solving the total resistance and various resistance components of the underwater vehicle based on the computational domain grid and the configured numerical calculation conditions, including friction resistance and pressure resistance.

[0053] S4. Post-process and analyze the above-mentioned total resistance and each resistance component, and further analyze the influence of the blocking effect on the velocity field around the underwater vehicle. The accuracy and reliability of the numerical method are verified by comparing the calculated results of ARBUV at a towing speed of 1-7m / s with the experimental results in the NWPU towing tank.

[0054] The above total resistance and each resistance component are post-processed to obtain the calculated numerical results of ARBUV under different blocking ratio conditions. When the blocking ratio is reduced from 3% to 0.375%, the total resistance and pressure resistance are greatly reduced. When the blocking ratio is lower than 0.375%, the friction resistance and pressure resistance values ​​are stable and close to the infinite domain. The experiment found that the error between the resistance calculation result and the experimental value is less than 5%. Figure 5 It is the ARBUV velocity flow field diagram.

[0055] In summary: The present invention provides a method for calculating the blocking effect of a towing tank of a rotating body underwater vehicle, including: S1, collecting data of ARBUV (rotating body underwater vehicle), and establishing a physical model based on the data of ARBUV; S2, importing the physical model of ARBUV into CFD numerical calculation software, and in order to be able to make a clear comparison and to meet the needs of actual engineering, the calculation domain includes a finite domain and an infinite domain. The finite domain refers to the area where the fluid flows with clear boundaries and its range is limited. The infinite domain refers to the area where the fluid flows without clear boundaries and its range is infinitely extended. Finally, the motion coordinate system of ARBUV is established respectively; S3, defining the boundary conditions of the CFD numerical calculation domain, and setting the CFD numerical solution model; S4, post-processing the above-mentioned total resistance and each resistance component to obtain the calculated numerical results of ARBUV under different blocking ratio conditions. This method is relatively efficient and accurate, and has strong practical applicability.

[0056] The present invention provides a blocking effect calculation system for an underwater vehicle towing pool, comprising: The model import module is used to establish the physical model of the underwater vehicle; the physical model of the underwater vehicle is imported into the CFD numerical calculation software, the motion coordinate system of the underwater vehicle is set, and the calculation domain is established; The numerical calculation module is used to define the boundary conditions of the CFD numerical calculation domain and to mesh the geometric model of the calculation domain; configure the numerical calculation conditions of the underwater vehicle under different blocking ratio conditions, and set the CFD numerical solution model to solve the total resistance and various resistance components of the underwater vehicle based on the calculation domain mesh and the configured numerical calculation conditions; The result export module is used to post-process the total resistance and each resistance component to obtain the calculated numerical results of the underwater vehicle under different blocking ratio conditions.

[0057] The present invention provides an electronic device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the steps of the above method are implemented when the computer program is executed by the processor.

[0058] The present invention provides a storage medium, characterized in that a computer program is stored thereon, and when the computer program is run, it is used to execute the steps of the above method.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for calculating the blocking effect of an underwater vehicle towing tank, characterized in that: include: Establish a physical model of underwater vehicles; Import the underwater vehicle physical model into the CFD numerical calculation software, set the motion coordinate system of the underwater vehicle, and establish the calculation domain; Define the boundary conditions of the CFD numerical calculation domain and mesh the geometric model of the calculation domain; configure the numerical calculation conditions of the underwater vehicle under different blocking ratio conditions, and set the CFD numerical solution model to solve the total resistance and resistance components of the underwater vehicle based on the calculation domain mesh and the configured numerical calculation conditions; The total resistance and each resistance component are post-processed to obtain the numerical results of the underwater vehicle under different blocking ratio conditions.

2. The method for calculating the blocking effect of an underwater vehicle towing tank according to claim 1, characterized in that: The setting of the motion coordinate system of the underwater vehicle includes: Set up the geodetic coordinate system for describing the motion and attitude of the underwater vehicle numerical simulation results; The motion coordinate system of the underwater vehicle is obtained based on the center of the physical model. The origin of the coordinate system is at the head, and the test model moves in the opposite direction of the x-axis.

3. The method for calculating the blocking effect of the underwater vehicle towing tank according to claim 2, characterized in that: The computational domain is established according to the geodetic coordinate system, and includes a finite domain and an infinite domain.

4. The method for calculating the blocking effect of an underwater vehicle towing tank according to claim 3, characterized in that: Define the boundary conditions of the CFD numerical calculation domain, including: In the infinite domain, the inlet, side, top and bottom are all set as velocity inlets, the outlet is set as zero relative pressure, and except for the outlet and inlet, the remaining boundaries are kept 5 times the characteristic length from the model and are set as symmetry planes; In the finite domain, the distance between the head of the model and the front inlet is 1.5L, and the distance between the rear outlet and the tail of the model is 3.5L. The depth of the computational domain is the same as that of the actual towing tank, where L is the total length of the model; The surface of the model, the side walls and the bottom of the computational domain are specified as no-slip walls.

5. The method for calculating the blocking effect of an underwater vehicle towing tank according to claim 1, characterized in that: Set up the CFD numerical solution model, including the incompressible Reynolds-averaged Navier-Stokes equations and the combined Realizable - Model.

6. The method for calculating the blocking effect of an underwater vehicle towing tank according to claim 1, characterized in that: During the solution process, the numerical discretization adopts the second-order upwind scheme and the coupling method is used to solve.

7. The method for calculating the blocking effect of an underwater vehicle towing tank according to claim 1, characterized in that: The physical model of the underwater vehicle is established by collecting the geometric dimension data of the underwater vehicle and using three-dimensional modeling software according to the geometric dimension data of the underwater vehicle.

8. A system for calculating the blocking effect of an underwater vehicle towing tank, characterized in that: include: Model import module, used to build the physical model of underwater vehicles; Import the underwater vehicle physical model into the CFD numerical calculation software, set the motion coordinate system of the underwater vehicle, and establish the calculation domain; The numerical calculation module is used to define the boundary conditions of the CFD numerical calculation domain and to mesh the geometric model of the calculation domain; configure the numerical calculation conditions of the underwater vehicle under different blocking ratio conditions, and set the CFD numerical solution model to solve the total resistance and various resistance components of the underwater vehicle based on the calculation domain mesh and the configured numerical calculation conditions; The result export module is used to post-process the total resistance and each resistance component to obtain the calculated numerical results of the underwater vehicle under different blocking ratio conditions.

9. An electronic device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the method according to any one of claims 1 to 7 when executed by the processor.

10. A storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed, it is used to execute the steps of the method according to any one of claims 1 to 7.

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