A coupled solution method, program, device and storage medium suitable for performance analysis of integrated steam-water separation device in nuclear energy system

Abstract

The present invention belongs to the technical field of three-dimensional refined numerical calculation of integrated steam-water separators in nuclear energy systems, and specifically relates to a coupling solution method, program, equipment, and storage medium suitable for the performance analysis of integrated steam-water separation devices in nuclear energy systems. The present invention couples the data at the outlet of the rotary vane separator with the data at the inlet of the corrugated plate dryer, and the two serve as boundary conditions for each other, and iterates simultaneously. During the iteration process, a source term elimination model is added to the hydrophobic area of the rotary vane separator to simulate the hydrophobic port liquid sealing phenomenon; a critical Weber number model is added to the corrugated plate dryer to determine the state of the droplets, simulate the secondary carryover phenomenon inside the corrugated plate dryer, obtain the actual flow conditions of the corrugated plate dryer, and finally obtain the flow conditions inside the integrated steam-water separator. The present invention can perform a refined simulation of the hydrophobic liquid sealing phenomenon inside the rotary vane separator and accurately predict the inflection point of the secondary carryover velocity of the corrugated plate dryer.

Description

Technical Field

[0001] The present invention belongs to the technical field of three-dimensional refined numerical calculation of integrated steam-water separators in nuclear energy systems, and specifically relates to a coupling solution method, program, equipment and storage medium suitable for performance analysis of integrated steam-water separators in nuclear energy systems. Background Art

[0002] As a core component of the secondary dehumidification system, the steam-water separator's separation performance directly impacts the safety, reliability, and economic efficiency of nuclear power plants. Separators are divided into coarse and fine separators. The coarse separator, typically composed of a rotary vane separator, separates large droplets, removing 90% of the liquid phase from the steam. The fine separator, typically composed of a corrugated plate dryer, separates small droplets, removing any remaining droplets from the coarse separator. Its outlet humidity must not exceed 0.25%. Existing steam-water separators typically design the coarse and fine separators separately, then test them together. In recent years, with the rapid development of computers and computational fluid dynamics (CFD) technology, three-dimensional CFD solvers have been increasingly used in two-phase flow analysis due to their high precision, repeatability, low cost, short implementation cycle, and lack of safety concerns. CFD technology is also widely used in steam-water separators. However, due to the complex internal separation mechanisms of rotary vane separators and corrugated plate dryers, CFD technology has difficulty reproducing some real-world situations, such as the liquid seal problem at the hydrophobic port of rotary vane separators and the secondary carryover phenomenon in corrugated plate dryers.

[0003] Currently, nuclear energy technology is developing in the direction of miniaturization and integration. Separators are also developing in this direction, but existing studies on separators have all numerically studied the rotary vane separator and the corrugated plate dryer separately, failing to capture the flow conditions within the integrated separator. The difficulty lies in the fact that the computational models applicable to the rotary vane separator and the corrugated plate dryer cannot be used in the same fluid domain. If only one of these computational models is used to numerically simulate the integrated separator, the error is unacceptable. In light of these issues, different applicable models were developed for the rotary vane separator's drain port seal problem and the corrugated plate dryer's secondary carryover problem. The calculations for the rotary vane separator and the corrugated plate dryer were then coupled through data coupling, allowing analysis of the flow conditions within the integrated separator and achieving a refined three-dimensional numerical simulation of the integrated separator. Summary of the Invention

[0004] The object of the present invention is to provide a coupling solution method, program, equipment and storage medium suitable for performance analysis of an integrated steam-water separation device in a nuclear energy system.

[0005] A coupled solution method for performance analysis of an integrated steam-water separation device in a nuclear energy system includes the following steps:

[0006] Step 1: Model and mesh the rotary vane separator and corrugated plate dryer. The hydrophobic region of the rotary vane separator is meshed separately, while the corrugated plate dryer is meshed using partitions, separating the baffle, air holes, and corrugated plate regions.

[0007] Step 2: Use an integrated coupling calculation method to perform coupling iteration on the rotary vane separator and the corrugated plate dryer. Use the outlet data of the rotary vane separator as the inlet boundary condition of the corrugated plate dryer, and use the inlet data of the corrugated plate dryer as the outlet boundary condition of the rotary vane separator.

[0008] First, the rotary vane separator is calculated. The gas mass flow rate and liquid mass flow rate at the inlet boundary of the rotary vane separator are input, and the outlet pressure P1 of the rotary vane separator is input. The calculation is a steady-state calculation. To simulate the liquid sealing phenomenon of the hydrophobic port, the source term elimination model is added to the hydrophobic region of the rotary vane separator. When the liquid phase enters the hydrophobic region, it is eliminated, while the gas phase is not affected and flows out of the rotary vane separator outlet, thus achieving the model hydrophobic port liquid sealing effect. After the calculation converges, the gas mass flow rate and liquid mass flow rate of the rotary vane separator outlet are obtained.

[0009] The gas mass flow rate and liquid mass flow rate at the outlet of the rotary vane separator are used as input to calculate the corrugated plate dryer. To simulate the secondary carryover phenomenon inside the corrugated plate dryer, the critical Weber number model is added to the wall conditions of the corrugated plate region. If the Weber number of a droplet is less than the critical Weber number, the droplet is absorbed and no subsequent calculations are performed. If the Weber number of a droplet is greater than or equal to the critical Weber number, the droplet is given a momentum loss coefficient to rebound and continue to participate in subsequent calculations until the droplet is absorbed or leaves the calculation domain. After the calculation converges, the pressure P2 at the inlet of the corrugated plate dryer and the liquid mass flow rate at the outlet are obtained.

[0010] Step 3: Compare the pressure P2 at the inlet of the corrugated plate dryer with the outlet pressure P1 of the rotary vane separator. If the error is less than 1%, the coupling is considered successful; otherwise, use P2 as the outlet pressure of the rotary vane separator, that is, set P1 = P2, and return to step 2 to recalculate.

[0011] Furthermore, in the process of model construction and meshing of the rotary vane separator in step 1, the fluid domain surrounded by the two blades is meshed as a whole. First, a line mesh is generated for the envelope line of the blade, and then a surface mesh is generated based on the line mesh of the blade envelope line. Then, the two blade surface meshes are converted into volume meshes. In this way, the mesh model of the blade area of the rotary vane separator is obtained through the line mesh-surface mesh-volume mesh conversion generation technology.

[0012] Furthermore, in step 1, the hydrophobic region of the rotary vane separator is separately grid-divided, and the length of the hydrophobic region accounts for 20% to 30% of the length from the vane to the hydrophobic outlet.

[0013] Furthermore, in step 1, the corrugated plate dryer is divided into partitioned grids to separate the baffle, uniform air hole, and corrugated plate into three regions. Then, the model of each region is cut off with 1 / 60 to 1 / 10 of the entire model with the Z axis as the symmetry axis as the unit model of each region. The structured grid division technology is used for each unit model, and each unit grid is periodically arrayed. Finally, the interface technology is used to assemble them to obtain the grid model of the corrugated plate dryer.

[0014] Furthermore, in step 2, the source term elimination model is added to the hydrophobic area of the rotary vane separator, specifically:

[0015] Source cancellation model in a rotary vane separator:

[0016]

[0017] Among them, ρ and C l is the density and volume fraction of the gas-liquid two-phase mixture in the hydrophobic area grid unit of the rotary blade separator; t is the time step;

[0018] The source cancellation model is applied to the mass equation of the hydrophobic region of the rotary vane separator:

[0019]

[0020] in, represents the Hamiltonian operator, V represents the velocity vector;

[0021] By solving the mass equation and momentum equation of the hydrophobic region grid of the rotary vane separator, the liquid volume fraction in the hydrophobic region is obtained. The mass equation and momentum equation of the entire rotary vane separator grid are further solved to obtain the gas mass flow rate and liquid mass flow rate at the rotary vane separator outlet.

[0022] Furthermore, in the calculation process of the corrugated plate dryer in step 2, the corrugated plate dryer adopts a discrete term model, and the diameter distribution of the droplet particles at the inlet of the corrugated plate dryer adopts the Rosin-Rammler distribution function:

[0023]

[0024] in, is the droplet size constant, n is the size distribution parameter; d is the diameter of the droplet particle, and each grid at the inlet plane of the corrugated plate dryer contains a diameter distribution that follows Yd droplet particles;

[0025] Set the volume of group N to V 粒子 The particles are unified into a volume of V 包 The package is calculated, that is, NV 粒子 =V 包 ;in, m is the mass of the droplet particles; Ml2 is the liquid mass flow rate at the outlet of the rotary blade separator; t is the time step.

[0026] Furthermore, the critical Weber number of the droplet in step 2 is calculated as follows:

[0027]

[0028] Among them, u l represents the average velocity of the liquid film; u g represents the gas phase velocity, ρ l represents the liquid density; ρ g represents the gas phase density, l represents the plate spacing, σ represents the surface tension of the liquid film; u l represents the dynamic viscosity of the liquid phase, u g It represents the dynamic viscosity of the gas phase.

[0029] A computer device / equipment / system includes a memory, a processor, and a computer program stored in the memory. The processor executes the computer program to implement the steps of the above-mentioned coupled solution method suitable for performance analysis of an integrated steam-water separation device in a nuclear energy system.

[0030] A computer-readable storage medium stores a computer program / instruction, which, when executed by a processor, implements the steps of the coupling solution method for performance analysis of an integrated steam-water separation device in a nuclear energy system.

[0031] A computer program product includes a computer program / instruction, which, when executed by a processor, implements the steps of the coupling solution method for performance analysis of an integrated steam-water separation device in a nuclear energy system.

[0032] The beneficial effects of the present invention are:

[0033] The present invention couples the data at the outlet of the rotary vane separator with the data at the inlet of the corrugated plate dryer, and the two serve as boundary conditions for each other, and iterate simultaneously. During the iteration process, a source term elimination model is added to the hydrophobic area of the rotary vane separator to simulate the hydrophobic port liquid sealing phenomenon; a critical Weber number model is added to the corrugated plate dryer to judge the droplet state, simulate the secondary carryover phenomenon inside the corrugated plate dryer, obtain the actual flow conditions of the corrugated plate dryer, and finally obtain the flow conditions inside the integrated steam-water separator. The present invention can perform a refined simulation of the hydrophobic liquid sealing phenomenon inside the rotary vane separator and accurately predict the inflection point of the secondary carryover velocity of the corrugated plate dryer. When simulating the integrated steam-water separator, the two calculation models are calculated in two fluid domains by data coupling, realizing a refined simulation of the integrated steam-water separator, greatly improving the computational efficiency and accuracy of three-dimensional refined CFD numerical simulation in the application fields of rotary vane separators, corrugated plate dryers and integrated steam-water separators. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the rotary blade separator grid.

[0035] Figure 2 Schematic diagram of grid partitioning of corrugated plate dryer.

[0036] Figure 3 Schematic diagram of the grid of each area of the corrugated plate dryer.

[0037] Figure 4 It is the equilibrium diagram of the curved liquid film.

[0038] Figure 5 It is the overall flow chart of the present invention. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings.

[0040] In order to solve the problems in the prior art and take into account the accuracy and speed of three-dimensional refined CFD numerical calculations, the present invention provides a coupling solution method suitable for the performance analysis of an integrated steam-water separation device in a nuclear energy system. The integrated steam-water separator is divided into two calculation domains, a rotary vane separator and a corrugated plate dryer. The two calculation domains are meshed using high-quality meshing technology. The source term elimination model is then loaded into the rotary vane separator to simulate the real phenomenon of the hydrophobic liquid seal of the rotary vane separator. At the same time, the critical Weber number model is loaded into the corrugated plate dryer to simulate the secondary carryover phenomenon of the corrugated plate dryer, thereby realizing three-dimensional refined simulation. Finally, the data coupling between the outlet boundary of the rotary vane separator and the inlet boundary of the corrugated plate dryer is realized through the integrated coupling calculation method, and a converged solution is obtained in the CFD numerical iterative solution process.

[0041] The present invention adopts an integrated coupling calculation method to perform coupling iteration on the rotary vane separator and the corrugated plate dryer, taking the outlet data of the rotary vane separator as the inlet boundary condition of the corrugated plate dryer, and taking the inlet data of the corrugated plate dryer as the outlet boundary condition of the rotary vane separator. After the calculation converges, the final calculation result of the integrated steam-water separator is obtained. The iterative calculation process is shown in the attached figure. Figure 5 During the coupled calculation process, it is necessary to first construct the model and mesh the rotary blade separator and corrugated plate dryer, which includes the following steps:

[0042] Step 1: Model and mesh the rotary vane separator and corrugated plate dryer. The hydrophobic region of the rotary vane separator is meshed separately, while the corrugated plate dryer is meshed using partitions, separating the baffle, air holes, and corrugated plate regions.

[0043] Due to the large torsion angle of the blade area of the rotary vane separator, conventional mesh generation techniques are not applicable to it. Therefore, the fluid domain enclosed by the two blades is meshed as a whole. First, a line mesh is generated for the blade envelope. Then, a surface mesh is generated based on the line mesh of the blade envelope. The two blade surface meshes are then converted into volume meshes. Using the line mesh-surface mesh-volume mesh conversion technique, a mesh model of the rotary vane separator blade area is obtained.

[0044] To simulate the hydrophobic liquid seal of the rotary vane separator, a source term elimination model needs to be added. The source term elimination model needs to be added to the hydrophobic region, so the hydrophobic region needs to be meshed separately. Since the size of the hydrophobic region has a significant impact on the calculation results, it has been calculated that the optimal length of the hydrophobic region is 20% to 30% of the length from the blade to the hydrophobic port. The mesh model for the above operation is shown in the attached figure. Figure 1 As shown;

[0045] Due to the complex structure of the corrugated plate dryer, there are baffles, uniform air holes, corrugated plates and other areas inside. The general grid generation technology has the disadvantages of low calculation efficiency and large grid volume. Therefore, the three areas mentioned above are separated by partitioning, as shown in the attached figure. Figure 2 Then, the model of each region is cut into 1 / 60 to 1 / 10 of the entire model with the Z axis as the symmetry axis as the unit model of each region. The structured grid division technology is used for each unit model. The grid model of each unit region is shown in the attached figure. Figure 3 , and then arrange the unit grids into periodic arrays, and finally assemble them using Interface technology to obtain the grid model of the corrugated plate dryer;

[0046] Step 2: Use an integrated coupling calculation method to perform coupling iteration on the rotary vane separator and the corrugated plate dryer. Use the outlet data of the rotary vane separator as the inlet boundary condition of the corrugated plate dryer, and use the inlet data of the corrugated plate dryer as the outlet boundary condition of the rotary vane separator.

[0047] First, the rotary vane separator is calculated. The gas mass flow rate Mg1 and liquid mass flow rate Ml1 at the inlet boundary of the rotary vane separator are input, and the outlet pressure P1 of the rotary vane separator is input. The calculation is a steady-state calculation. To simulate the liquid sealing phenomenon of the hydrophobic port, the source term elimination model is added to the hydrophobic region of the rotary vane separator through a user-compiled function (UDF). The liquid phase is eliminated after entering the hydrophobic region, while the gas phase is unaffected and flows out of the rotary vane separator outlet, thus achieving the model hydrophobic port liquid sealing effect. After the calculation converges, the gas mass flow rate and liquid mass flow rate at the outlet of the rotary vane separator are obtained.

[0048] The linearized expression of the source term is:

[0049] S=A+BΦ (1)

[0050] Where: S is the source term, A and B are constants, and Φ is the independent variable of the relevant source term;

[0051] For the rotary vane separator, Φ in formula (1) is the volume fraction of the liquid phase C l , the liquid phase volume fraction in the hydrophobic area should be 0, so A is equal to 0. As the liquid phase continues to move to the hydrophobic area, the liquid phase content continues to decrease, so B is related to the time step t. In addition, for a grid unit, the liquid phase content is equal to the product of the density ρ of the mixture and the volume fraction C l , the formula (1) is rewritten as:

[0052]

[0053] Equation (2) is the source term elimination model in the rotary vane separator. Since the calculation is a steady-state calculation, the time step t in Equation (2) needs to be given. By comparing with experimental data, t can be taken as 0.01s.

[0054] The source elimination model is loaded into the mass equation of the mesh in the drain outlet area, as shown in formula (3):

[0055]

[0056] in, represents the Hamiltonian operator, V represents the velocity vector;

[0057] By solving the mass equation and momentum equation of the hydrophobic area grid of the rotary vane separator, the liquid phase volume fraction in the hydrophobic area is obtained. The mass equation and momentum equation of the entire grid of the rotary vane separator are further solved to obtain the gas phase mass flow rate Mg2 and liquid phase mass flow rate Ml2 at the outlet of the rotary vane separator.

[0058] Then, the calculation of the corrugated plate dryer is carried out, and the gas mass flow rate Mg2 and liquid mass flow rate Ml2 at the outlet of the rotary blade separator are used as input. In order to simulate the secondary carryover phenomenon inside the corrugated plate dryer, the critical Weber number model is added to the wall conditions of the corrugated plate area.

[0059] Since the corrugated plate dryer adopts the discrete term model (DPM), the liquid mass flow rate Ml2 cannot be directly input into the DPM model of the corrugated plate dryer, but needs to be input into the inlet of the corrugated plate dryer using the UDF method.

[0060] The particle size distribution at the inlet adopts the Rosin-Rammler distribution function. The Rosin-Rammler distribution function is based on the assumption that there is an exponential relationship between the droplet diameter d and the mass fraction of droplets with a diameter greater than d. The mathematical expression is:

[0061]

[0062] in, is the droplet size constant, n is the size distribution parameter; d is the diameter of the droplet particle, and each grid at the inlet plane of the corrugated plate dryer contains a diameter distribution that follows Y d droplet particles; through experimental measurement, we can get The size of n, and Y d The values can be 0.95, 0.7, 0.5, 0.4, 0.2, and 0.05, respectively, and the particle diameter d can be obtained by formula (4).

[0063] When using integrated coupling calculation, in order to use UDF in the DPM model expression (4), the volume of N groups is V 粒子 The particles are unified into a volume of V 包 The package is calculated, that is, NV 粒子 =V 包 ;in, m is the mass of the droplet particles; Ml2 is the liquid mass flow rate at the outlet of the rotary blade separator; t is the time step.

[0064] To simulate the secondary carryover phenomenon inside the corrugated plate dryer, the critical Weber number model is added to the corrugated plate wall conditions through UDF. When a droplet hits the wall, the size of the Weber number determines whether the droplet is absorbed. The mathematical expression of the critical Weber number model is as follows:

[0065] The critical Weber number is defined as:

[0066]

[0067] Where: ρ l is the liquid density, u l is the average velocity of the liquid film, h is the thickness of the liquid film, and σ is the surface tension of the liquid film;

[0068] Step 4.2. Since the first place where the liquid film breaks is in contact with the airflow, when it breaks, It can be considered to be equal to the air flow velocity. In formula (5), the thickness of the liquid film must also be known, as shown in the following: Figure 4 As shown, the force balance analysis of the curved liquid film element is performed:

[0069]

[0070] Where: f is the external force on the fluid element, β is the angle corresponding to the water film, and u is the flow velocity of the liquid film.

[0071] Ignore the small terms in the above formula and integrate in the direction of liquid film thickness to get:

[0072]

[0073] When the liquid film breaks in this microelement, F = 0. So: Right now

[0074] Considering the steady-state of the liquid film, the shear stress of the airflow on the liquid film surface is equal to the shear stress of the wall on the liquid film. Considering that the liquid film thickness accounts for a small proportion of the channel width, the shear stress of the airflow on the corrugated plate wall is regarded as the shear stress of the airflow on the liquid film, so:

[0075]

[0076] From equations (5)-(8), we can deduce:

[0077]

[0078] Among them, u g represents the gas phase velocity, ρ g represents the gas phase density, l represents the plate spacing; μ l Indicates the dynamic viscosity of the liquid phase, μ g It represents the dynamic viscosity of the gas phase.

[0079] Substitute the relevant physical property parameters in the calculation condition into formula (9) to obtain the critical Weber number. The critical Weber number is incorporated into the wall condition through the user-defined function (UDF) and the following judgment is made: if the Weber number of the droplet is less than the critical Weber number (We <We c), then the droplet is absorbed and no subsequent calculations are performed on the droplet; if the Weber number of the droplet is greater than or equal to the critical Weber number (We≥We c ), the droplet is given a momentum loss coefficient ε to rebound, and the droplet continues to participate in subsequent calculations until it is absorbed or leaves the calculation domain. After the calculation converges, the pressure P2 at the inlet of the corrugated plate dryer and the liquid mass flow rate Ml3 at the outlet are obtained.

[0080] Step 3: Compare the pressure P2 at the inlet of the corrugated plate dryer with the outlet pressure P1 of the rotary vane separator. If the error is less than 1%, the coupling is considered successful; otherwise, use P2 as the outlet pressure of the rotary vane separator, that is, set P1 = P2, and return to step 2 to recalculate.

[0081] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A coupled solution method suitable for performance analysis of integrated steam-water separation devices in nuclear energy systems, characterized in that: The following steps are involved: Step 1: Model and mesh the rotary vane separator and corrugated plate dryer. The hydrophobic region of the rotary vane separator is meshed separately, while the corrugated plate dryer is meshed using partitions, separating the baffle, air holes, and corrugated plate regions. Step 2: Use an integrated coupling calculation method to perform coupling iteration on the rotary vane separator and the corrugated plate dryer. Use the outlet data of the rotary vane separator as the inlet boundary condition of the corrugated plate dryer, and use the inlet data of the corrugated plate dryer as the outlet boundary condition of the rotary vane separator. First, the rotary vane separator is calculated. The gas mass flow rate and liquid mass flow rate at the inlet boundary of the rotary vane separator are input, and the outlet pressure P1 of the rotary vane separator is input. The calculation is a steady-state calculation. To simulate the liquid sealing phenomenon of the hydrophobic port, the source term elimination model is added to the hydrophobic region of the rotary vane separator. The liquid phase is eliminated after entering the hydrophobic region, while the gas phase is not affected and flows out of the rotary vane separator outlet, thus achieving the model's hydrophobic port liquid sealing effect. After the calculation converges, the gas mass flow rate and liquid mass flow rate at the outlet of the rotary vane separator are obtained; The gas mass flow rate and liquid mass flow rate at the outlet of the rotary vane separator are used as input to calculate the corrugated plate dryer. To simulate the secondary carryover phenomenon inside the corrugated plate dryer, the critical Weber number model is added to the wall conditions of the corrugated plate region. If the Weber number of a droplet is less than the critical Weber number, the droplet is absorbed and no subsequent calculations are performed. If the Weber number of a droplet is greater than or equal to the critical Weber number, the droplet is given a momentum loss coefficient to rebound and continue to participate in subsequent calculations until the droplet is absorbed or leaves the calculation domain. After the calculation converges, the pressure P2 at the inlet of the corrugated plate dryer and the liquid mass flow rate at the outlet are obtained. Step 3: Compare the pressure P2 at the inlet of the corrugated plate dryer with the outlet pressure P1 of the rotary vane separator. If the error is less than 1%, the coupling is considered successful; otherwise, use P2 as the outlet pressure of the rotary vane separator, that is, set P1 = P2, and return to step 2 to recalculate.

2. A coupled solution method for performance analysis of an integrated steam-water separation device in a nuclear energy system according to claim 1, characterized in that: In the process of model construction and meshing of the rotary vane separator in step 1, the fluid domain surrounded by the two blades is meshed as a whole. First, a line mesh is generated for the envelope line of the blade, and then a surface mesh is generated based on the line mesh of the blade envelope line. Then, the two blade surface meshes are converted into volume meshes. In this way, the mesh model of the blade area of the rotary vane separator is obtained through the line mesh-surface mesh-volume mesh conversion generation technology.

3. The coupled solution method for performance analysis of an integrated steam-water separation device in a nuclear energy system according to claim 1 is characterized in that: In the step 1, the hydrophobic region of the rotary vane separator is separately grid-divided, and the length of the hydrophobic region accounts for 20% to 30% of the length from the vane to the hydrophobic outlet.

4. The coupled solution method for performance analysis of an integrated steam-water separation device in a nuclear energy system according to claim 1 is characterized in that: In step 1, the corrugated plate dryer is divided into partitioned grids to separate the baffle, uniform air hole, and corrugated plate. Then, the model of each area is cut with 1 / 60 to 1 / 10 of the entire model with the Z axis as the symmetry axis as the unit model of each area. The structured grid division technology is used for each unit model, and each unit grid is periodically arrayed. Finally, the interface technology is used to assemble them to obtain the grid model of the corrugated plate dryer.

5. The coupled solution method for performance analysis of an integrated steam-water separation device in a nuclear energy system according to claim 1 is characterized in that: In step 2, the source term elimination model is added to the hydrophobic area of the rotary vane separator, specifically: Source cancellation model in a rotary vane separator: Among them, ρ and C l is the density and volume fraction of the gas-liquid two-phase mixture in the hydrophobic area grid unit of the rotary blade separator; t is the time step; The source cancellation model is applied to the mass equation of the hydrophobic region of the rotary vane separator: in, represents the Hamiltonian operator, V represents the velocity vector; By solving the mass equation and momentum equation of the hydrophobic region grid of the rotary vane separator, the liquid volume fraction in the hydrophobic region is obtained. The mass equation and momentum equation of the entire rotary vane separator grid are further solved to obtain the gas mass flow rate and liquid mass flow rate at the rotary vane separator outlet.

6. The coupled solution method for performance analysis of an integrated steam-water separation device in a nuclear energy system according to claim 1, characterized in that: In the calculation process of the corrugated plate dryer in step 2, the corrugated plate dryer adopts a discrete term model, and the diameter distribution of the droplet particles at the inlet of the corrugated plate dryer adopts the Rosin-Rammler distribution function: in, is the droplet size constant, n is the size distribution parameter; d is the diameter of the droplet particle, and each grid at the inlet plane of the corrugated plate dryer contains a diameter distribution that follows Y d droplet particles; Set the volume of group N to V 粒子 The particles are unified into a volume of V 包 The package is calculated, that is, NV 粒子 =V 包 ;in, m is the mass of the droplet particles; Ml2 is the liquid mass flow rate at the outlet of the rotary blade separator; t is the time step.

7. The coupled solution method for performance analysis of an integrated steam-water separation device in a nuclear energy system according to claim 1, characterized in that: The calculation method of the critical Weber number of the droplet in step 2 is: Among them, u l represents the average velocity of the liquid film; u g represents the gas phase velocity, ρ l represents the liquid density; ρ g represents the gas phase density, l represents the plate spacing, σ represents the surface tension of the liquid film; μ l Indicates the dynamic viscosity of the liquid phase, μ g It represents the dynamic viscosity of the gas phase.

8. A computer device / apparatus / system comprising a memory, a processor, and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 7.

9. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer program product comprising a computer program / instructions, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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