Structured mesh construction method for ribbed rod bundle channels

Abstract

The present application relates to a structured mesh construction method and apparatus for ribbed rod bundle channels, a computer device, a storage medium, and a computer program product. The method comprises: on the basis of first parameters of a fuel rod bundle, constructing a first mesh model for a fuel rod bundle without ribs; determining a displacement vector of deformed nodes in a ribbed structure region on the basis of second parameters of the fuel rod bundle; and editing the nodes in the ribbed structure region in the first mesh model on the basis of the displacement vector, to obtain a target mesh model for ribbed rod bundle channels. The target mesh model for ribbed rod bundle channels obtained by means of this method is more accurate.

Description

A method for constructing structured grids of ribbed rod bundle channels

[0001] Cross-references

[0002] This application refers to Chinese Patent Application No. 2024100652051, filed on January 16, 2024, entitled “A Method for Constructing a Structured Grid of Ribbed Rod Bundle Channels”, which is incorporated into this application in its entirety by reference. Technical Field

[0003] The present application relates to the technical field of thermal hydraulic numerical simulation of nuclear reactors, and in particular to a method, apparatus, computer equipment, storage medium and computer program product for constructing a structured grid of a ribbed rod bundle channel. Background Art

[0004] With the development of new nuclear reactor technologies, fuel rods with ribbed structures have been proposed for enhancing flow and heat transfer. Numerical simulations of the thermal-hydraulic dynamics of ribbed rod bundles have placed higher demands on meshing methods. Meshing is a key technology in numerical model establishment and preprocessing, significantly impacting the accuracy and cost-effectiveness of numerical simulations.

[0005] Traditionally, meshing for complex structures like ribbed fuel bundles involves two methods: 1) automatically generating an unstructured mesh; and 2) removing the ribs from the structured mesh by mesh cutting.

[0006] However, the number of unstructured grids is usually large, and the computing resource consumption is high; and the method of generating a structured grid by cutting and removing the rib part of the grid will result in a rough surface of the grid near the wall, which cannot truly reflect the three-dimensional characteristics of the actual flow channel, thereby reducing the model accuracy.

[0007] Summary of the Invention

[0008] Based on this, it is necessary to provide a method, device, computer equipment, computer-readable storage medium and computer program product for constructing a structured grid model of a ribbed rod bundle channel that can improve the accuracy of the grid model in order to address the above technical problems.

[0009] In a first aspect, the present application provides a method for constructing a structured grid of ribbed rod bundle channels. The method comprises:

[0010] constructing a first mesh model of the fuel bundle without ribs according to the first parameters of the fuel bundle;

[0011] Determining the displacement vector of the deformation node in the rib structure region according to the second parameter of the fuel bundle;

[0012] According to the displacement vector, the nodes of the rib structure area in the first mesh model are edited to obtain the target mesh model with ribbed rod bundle channels.

[0013] In one embodiment, the second parameters include the radius of the fuel rods in the fuel rod bundle, the position of the rib center point, and the rib radius; and determining the displacement vector of the deformation node in the rib structure region based on the second parameters of the fuel rod bundle includes:

[0014] A three-dimensional coordinate system is established based on the center point of the bottom surface of the fuel rod of the fuel rod bundle and the central axis of the fuel rod; based on the radius of the fuel rod in the fuel rod bundle, the position of the rib center point and the rib radius, the first vector, second vector and third vector of the fuel rod in the fuel rod bundle in the three-dimensional coordinate system are obtained, wherein the first vector is used to describe the vector from the center point of the fuel rod to the node before deformation, the second vector is used to describe the vector from the center point of the fuel rod to the center point of the rib, and the third vector is used to describe the vector from the center point of the rib to the node after deformation; based on the first vector, the second vector and the third vector, the displacement vector of the deformed node in the rib structure area is determined.

[0015] In one embodiment, obtaining a first vector, a second vector, and a third vector of a fuel rod bundle grid in a three-dimensional coordinate system based on a radius of a fuel rod in the fuel rod bundle, a rib center point position, and a rib radius includes:

[0016] The first vector is obtained by fusing the radius of the fuel rods in the fuel rod bundle and the angle between the first vector of the fuel rod bundle in the three-dimensional coordinate system and the target coordinate axis. The second vector is obtained by fusing the distance between the center point of the rib and the center point of the fuel rod in the fuel rod bundle and the angle between the second vector in the three-dimensional coordinate system and the target coordinate axis. The third vector is obtained by fusing the distance between the deformed node of the fuel rod in the fuel rod bundle and the center point of the rib according to the position of the rib center point and the angle between the third vector of the fuel rod bundle in the three-dimensional coordinate system and the target coordinate axis.

[0017] In one embodiment, editing the nodes of the rib structure region in the first mesh model according to the displacement vector to obtain a target mesh model with ribbed rod bundle channels includes:

[0018] The model rib region is located in the first mesh model according to the opening angle of the fuel bundle rib structure region and the angle between the second vector and the target coordinate axis. The nodes in the model rib region are edited according to the displacement vector to obtain the target mesh model with the ribbed rod bundle channel.

[0019] In one embodiment, the nodes in the rib region of the model are edited according to the displacement vector to obtain a target mesh model of the ribbed rod bundle channel, including:

[0020] The displacement vector and the coordinates of each node in the model rib area are fused to obtain the coordinates of each rib in the model rib area; each node in the model rib area is moved to the coordinates of each rib to obtain the target grid model with ribbed rod bundle channel.

[0021] In one embodiment, the first parameters include the radius, number, and grid structure of the fuel rods in the fuel bundle; and constructing a first mesh model of the fuel bundle without ribs based on the first parameters of the fuel bundle includes:

[0022] A two-dimensional geometric model of the fuel rod bundle is established according to the radius and number of fuel rods in the fuel rod bundle; the two-dimensional geometric model is quadrilaterally meshed according to the grid structure of the fuel rod bundle to obtain a second mesh model; and the second mesh model is three-dimensionally stretched to obtain a first mesh model.

[0023] In a second aspect, the present application also provides a device for constructing a structured grid of ribbed rod bundle channels. The device comprises:

[0024] A first grid model building module is used to build a first grid model of the fuel rod bundle without ribs according to the first parameter of the fuel rod bundle;

[0025] The displacement vector determination module is used to determine the displacement vector of the deformation node of the rib structure area according to the second parameter of the fuel rod bundle; the target grid model generation module is used to edit the nodes of the rib structure area in the first grid model according to the displacement vector to obtain the target grid model with the rib rod bundle channel.

[0026] In a third aspect, the present application further provides a computer device. The computer device includes a memory and a processor. The memory stores a computer program. When the processor executes the computer program, the following steps are performed:

[0027] Based on the first parameters of the fuel rod bundle, a first mesh model without ribs is constructed. Based on the second parameters of the fuel rod bundle, the displacement vectors of the deformed nodes in the rib structure area are determined. Based on the displacement vectors, the nodes in the rib structure area in the first mesh model are edited to obtain a target mesh model with ribbed rod bundle channels.

[0028] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the following steps:

[0029] Based on the first parameters of the fuel rod bundle, a first mesh model without ribs is constructed. Based on the second parameters of the fuel rod bundle, the displacement vectors of the deformed nodes in the rib structure area are determined. Based on the displacement vectors, the nodes in the rib structure area in the first mesh model are edited to obtain a target mesh model with ribbed rod bundle channels.

[0030] In a fifth aspect, the present application further provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the following steps:

[0031] Based on the first parameters of the fuel rod bundle, a first mesh model without ribs is constructed. Based on the second parameters of the fuel rod bundle, the displacement vectors of the deformed nodes in the rib structure area are determined. Based on the displacement vectors, the nodes in the rib structure area in the first mesh model are edited to obtain a target mesh model with ribbed rod bundle channels.

[0032] The above-mentioned method, apparatus, computer device, storage medium and computer program product for constructing a structured grid for a ribbed rod bundle channel construct a first grid model of a fuel rod bundle without ribs based on the first parameters of the fuel rod bundle; determine the displacement vectors of the deformation nodes in the rib structure area based on the second parameters of the fuel rod bundle; and construct a target grid model of the ribbed rod bundle channel based on the first grid model and the displacement vectors. The present application re-edits the first grid model of the fuel rod bundle without ribs based on the displacement vectors of the deformation nodes in the rib structure area, resulting in a target grid model of the ribbed rod bundle channel with a smooth wall grid surface and high model accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG1 is a schematic flow chart of a method for constructing a structured grid of ribbed rod bundle channels according to one embodiment;

[0034] FIG2 is a schematic diagram of the XOY cross-section of a fuel rod in one embodiment;

[0035] FIG3 is a schematic diagram of the XOY coordinate section of a fuel rod in another embodiment;

[0036] FIG4 (a) is a schematic diagram of the structure of a target grid model in one embodiment;

[0037] FIG4( b ) is a schematic structural diagram of a target grid model fuel rod surface in one embodiment;

[0038] FIG5 is a schematic flow chart of a method for constructing a structured grid of ribbed rod bundle channels in another embodiment;

[0039] FIG6 is a structural block diagram of a device for constructing a structured grid of ribbed rod bundle channels according to one embodiment;

[0040] FIG7 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0042] In practical applications, in order to improve the heat exchange coefficient of the fuel rod bundle, ribs can be added to the fuel rods. When performing thermal-hydraulic numerical simulation of a nuclear reactor on a fuel rod bundle with ribs, the presence of ribs in the fuel rod bundle increases the difficulty of constructing a grid model of the fuel rod bundle. The present application provides a method for constructing a structured grid of a ribbed rod bundle channel. By editing a first grid model of a fuel rod bundle without ribs to construct a target grid model of a fuel rod bundle channel with ribs, the efficiency of model construction can be improved. By editing the nodes in the rib structure area of ​​the first grid model of the fuel rod bundle without ribs, the wall grid surface can be made smooth, which can truly reflect the three-dimensional characteristics of the actual flow channel, thereby improving the accuracy of the rod bundle channel grid model.

[0043] In one embodiment, as shown in FIG1 , a method for constructing a structured grid of ribbed rod bundle channels is provided. This embodiment uses the method applied to a terminal as an example. It is understood that the method can also be applied to a server, or to a system including a terminal and a server, and implemented through interaction between the terminal and the server. In this embodiment, the method includes the following steps:

[0044] Step 202: construct a first mesh model of the fuel bundle without ribs based on first parameters of the fuel bundle.

[0045] Among them, the first parameters of the fuel rod bundle include the radius, number and grid structure of the fuel rods in the fuel rod bundle. The radius, number and grid structure of the fuel rod bundle can be measured by a sensor to obtain the first parameters of the fuel rod bundle. The first grid model refers to the grid model of the fuel rod bundle without ribs. The first grid model is a three-dimensional model and can reflect the three-dimensional characteristics of the fuel rod bundle without ribs.

[0046] Specifically, circular fuel rods are generated according to the radius of the fuel rod bundle; a two-dimensional geometric model of the bottom surface of the fuel rod bundle is generated according to the number of fuel rods in the fuel rod bundle and the grid structure between the fuel rods; and the two-dimensional geometric model is stretched to obtain a three-dimensional first grid model.

[0047] Step 204 : determining the displacement vector of the deformation node in the rib structure region according to the second parameter of the fuel bundle.

[0048] Among them, the second parameter may include the radius of the fuel rod in the fuel rod bundle, the position of the rib center point and the rib radius. The rib structure area refers to the area where the fuel rod ribs are located. Taking the cross section of the fuel rod as an example, the rib structure area can be a fan-shaped area at a certain central angle of a circle.

[0049] It should be noted that the rib structure region can be discretely viewed as multiple nodes. The rib can be understood as the deformation node of the rib structure region of the fuel rod extending outward. The deformation node refers to the node located in the rib structure region. The displacement vector of the deformation node refers to the vector difference between the node position after deformation and the node position before deformation.

[0050] As an example, step 204 includes: obtaining, based on the second parameter of the fuel rod bundle, a vector from the center point of the fuel rod to the node before deformation, a vector from the center point of the fuel rod to the center point of the rib, and a vector from the center point of the rib to the node after deformation; and fusing the vector from the center point of the fuel rod to the node before deformation, the vector from the center point of the fuel rod to the center point of the rib, and the vector from the center point of the rib to the node after deformation to obtain a displacement vector of the deformation node in the rib structure area.

[0051] Step 206 : Edit the nodes of the rib structure region in the first mesh model according to the displacement vector to obtain a target mesh model of the ribbed rod bundle channel.

[0052] Specifically, the editing may be node translation. According to the displacement vector, the nodes of the rib structure region are translated. The contour of the translated rib structure region is fitted according to each translated node. The target mesh model of the ribbed rod bundle channel is constructed according to the translated contour.

[0053] In the above-mentioned method for constructing a structured grid for a ribbed rod bundle channel, a first grid model of a fuel bundle without ribs is constructed based on the first parameters of the fuel bundle; the displacement vectors of the deformation nodes in the rib structure area are determined based on the second parameters of the fuel bundle; and a target grid model of the ribbed rod bundle channel is constructed based on the first grid model and the displacement vectors. In the present application, the first grid model without ribbed fuel bundles is re-edited based on the displacement vectors of the deformation nodes in the rib structure area. The resulting target grid model of the ribbed rod bundle channel has a smooth wall grid surface and high model accuracy.

[0054] In one embodiment, the second parameters include the radius of the fuel rods in the fuel rod bundle, the position of the rib center point, and the rib radius. Determining the displacement vector of the deformation node in the rib structure region based on the second parameters of the fuel rod bundle includes:

[0055] A three-dimensional coordinate system is established based on the center point of the bottom surface of the fuel rod of the fuel rod bundle and the central axis of the fuel rod; based on the radius of the fuel rod in the fuel rod bundle, the position of the rib center point and the rib radius, the first vector, second vector and third vector of the fuel rod in the fuel rod bundle in the three-dimensional coordinate system are obtained, wherein the first vector is used to describe the vector from the center point of the fuel rod to the node before deformation, the second vector is used to describe the vector from the center point of the fuel rod to the center point of the rib, and the third vector is used to describe the vector from the center point of the rib to the node after deformation; based on the first vector, the second vector and the third vector, the displacement vector of the deformed node in the rib structure area is determined.

[0056] Specifically, a three-dimensional coordinate system is established with the center point of the bottom surface of the fuel rod of the fuel rod bundle as the origin and the central axis of the fuel rod as the Z axis, as shown in Figure 2. The XOY section of the fuel rod is used for analysis. (x, y) is the coordinate of the node on the X axis and Y axis before deformation, (x′, y′) is the coordinate of the node on the X axis and Y axis after deformation, (x f ,y f ) is the center point of the fuel rod, that is, the center of the cross section of the fuel rod, (x w ,y w ) is the center point of the rib, the first vector is The second vector is The third vector is The first vector, the second vector and the third vector are fused to obtain the displacement vector of the deformation node in the rib structure area.

[0057] In this embodiment, a three-dimensional coordinate system is established based on the parameters of the fuel rod, and the displacement vectors of the deformation nodes of the rib structure region of each XOY cross section of the fuel rod in the coordinate system are determined based on the known parameters of the fuel rod. In this way, the displacement vectors obtained are more accurate.

[0058] In one embodiment, obtaining a first vector, a second vector, and a third vector of a fuel bundle grid in a three-dimensional coordinate system based on the radius of a fuel rod, a rib center point position, and a rib radius in a fuel bundle includes:

[0059] The first vector is obtained by fusing the radius of the fuel rods in the fuel rod bundle and the angle between the first vector of the fuel rod bundle in the three-dimensional coordinate system and the target coordinate axis. The second vector is obtained by fusing the distance between the center point of the rib and the center point of the fuel rod in the fuel rod bundle and the angle between the second vector in the three-dimensional coordinate system and the target coordinate axis. The third vector is obtained by fusing the distance between the deformed node of the fuel rod in the fuel rod bundle and the center point of the rib according to the position of the rib center point and the angle between the third vector of the fuel rod bundle in the three-dimensional coordinate system and the target coordinate axis.

[0060] The target coordinate axis can be the X-axis of the coordinate system. The angles between the vectors formed by the nodes in the rib structure area of ​​the fuel rod and the center point of the fuel rod and the target coordinate axis are different. Before deformation, the distances from the nodes in the same XOY cross section to the center point of the fuel rod remain unchanged. After deformation, the distances from the nodes in the rib structure area to the rib center of the same XOY cross section remain fixed.

[0061] Specifically, as shown in FIG3 , the radius of the fuel rod is R f , the radius and the cosine value of θ are combined as the X-axis coordinate of the first vector, and the radius and the sine value of θ are combined as the Y-axis coordinate of the first vector, that is, the first vector The distance between the center point of the rib in the fuel bundle and the center point of the fuel rod is d, and the angle between the second vector and the target coordinate axis is θ f , the distance d and θ f The cosine value of is fused as the X-axis coordinate of the second vector, and the distance d is combined with θ f The sine value of is fused as the Y-axis coordinate of the second vector, that is, the second vector The distance between the node and the center point of the rib after the fuel rod is deformed is R w The angle between the third vector of the fuel bundle and the target coordinate axis in the three-dimensional coordinate system is θ w , the distance R w and θ w The cosine value of is fused as the X-axis coordinate of the third vector, and the distance R w and θ w The sine value of is fused as the Y-axis coordinate of the third vector, that is, the third vector

[0062] As an example, the coordinate vectors of the node before and after deformation can be:

[0063] As an example, referring to Figure 3, the angle between the third vector of the fuel bundle and the target coordinate axis in the three-dimensional coordinate system is:

[0064] Among them, θ w is the angle between the third vector of the fuel bundle and the target coordinate axis in the three-dimensional coordinate system, θ f is the angle between the second vector and the target coordinate axis, θ is the angle between the first vector of the fuel bundle and the target coordinate axis in the three-dimensional coordinate system, θwm and θfm are the angles between the intersection point of the rib and the rod surface and the rib center and the fuel rod center.

[0065] In one embodiment, the nodes of the rib structure region in the first mesh model are edited according to the displacement vector to obtain a target mesh model with ribbed rod bundle channels, including:

[0066] The model rib region is located in the first mesh model according to the opening angle of the fuel bundle rib structure region and the angle between the second vector and the target coordinate axis. The nodes in the model rib region are edited according to the displacement vector to obtain the target mesh model with the ribbed rod bundle channel.

[0067] Specifically, the model rib area is the angular range between the center point of the fuel rod and the node vector and the target coordinate axis in the coordinate system. Based on the opening angle of the fuel rod bundle rib structure area and the angle between the second vector and the target coordinate axis, a judgment expression that meets the range conditions is constructed. The area that satisfies the judgment expression is located as the model rib area. After determining the model rib area, the nodes in the model rib area are edited according to the displacement vector to obtain the target mesh model with ribbed rod bundle channels.

[0068] As an example, the specific mathematical expression of the judgment expression can be |θ-θ f |<θ fm / 2, where θfm is the angle between the rib and the center of the fuel rod, θ f is the angle between the second vector and the target coordinate axis, and the value range of θ represents the angle range corresponding to the model rib area.

[0069] In this embodiment, the model rib region is first determined based on the span angle of the fuel bundle rib structure region and the angle between the second vector and the target coordinate axis. Then, the nodes in the model rib region are edited. This avoids editing the nodes in the non-model rib region, thereby improving the accuracy of the target mesh model.

[0070] In one embodiment, the nodes in the rib region of the model are edited according to the displacement vector to obtain a target mesh model of the ribbed rod bundle channel, including:

[0071] The displacement vector and the coordinates of each node in the model rib area are fused to obtain the coordinates of each rib in the model rib area; each node in the model rib area is moved to the coordinates of each rib to obtain the target grid model with ribbed rod bundle channel.

[0072] Specifically, the coordinates of each node in the model rib area and the displacement vector corresponding to each node are added to obtain the coordinates of each rib in the model rib area; each node in the model rib area is moved to each rib coordinate respectively, and the contour of the translated rib structure area is fitted according to each node after translation. The target grid model with ribbed rod bundle channel is constructed according to the contour after translation, as shown in Figure 4.

[0073] In this embodiment, a first mesh model without ribbed fuel bundles is translated based on the displacement vectors of the deformed nodes in the rib structure region. The contour of the translated rib structure region is fitted based on the translated nodes. The resulting target mesh model of the ribbed bundle channel has a smooth wall mesh surface and high model accuracy.

[0074] In one embodiment, the first parameters include the radius, number, and grid structure of the fuel rods in the fuel bundle. Constructing a first mesh model of the fuel bundle without ribs based on the first parameters of the fuel bundle includes:

[0075] A two-dimensional geometric model of the fuel rod bundle is established according to the radius and number of fuel rods in the fuel rod bundle; the two-dimensional geometric model is quadrilaterally meshed according to the grid structure of the fuel rod bundle to obtain a second mesh model; and the second mesh model is three-dimensionally stretched to obtain a first mesh model.

[0076] In this embodiment, by performing quadrilateral mesh division on the two-dimensional geometric model, the first mesh model constructed is a structured mesh model, which can reduce calculation costs.

[0077] In one embodiment, as shown in FIG5 , a two-dimensional geometric model of the fuel rod bundle is established based on the radius and number of fuel rods in the fuel rod bundle; the two-dimensional geometric model is quadrilaterally meshed based on the grid structure of the fuel rod bundle to obtain a second mesh model; and the second mesh model is three-dimensionally stretched to obtain a first mesh model, wherein the second mesh model is a two-dimensional mesh model of the fuel rod bundle without ribs, and the first mesh model is a three-dimensional mesh model of the fuel rod bundle without ribs.

[0078] In some embodiments, a three-dimensional coordinate system is established based on the center point of the bottom surface of the fuel rod of the fuel rod bundle and the central axis of the fuel rod; based on the radius of the fuel rod in the fuel rod bundle, the position of the rib center point and the rib radius, the first vector, the second vector and the third vector of the fuel rod in the fuel rod bundle in the three-dimensional coordinate system are obtained, wherein the first vector is used to describe the vector from the center point of the fuel rod to the node before deformation, the second vector is used to describe the vector from the center point of the fuel rod to the center point of the rib, and the third vector is used to describe the vector from the center point of the rib to the node after deformation; based on the first vector, the second vector and the third vector, the displacement vector of the deformed node of the rib structure area is determined. In this application, the first mesh model without the ribbed fuel rod bundle is re-edited based on the displacement vector of the deformed node of the rib structure area, and the target mesh model with the ribbed rod bundle channel is obtained. The wall mesh surface is smooth and the model accuracy is high.

[0079] After determining the displacement vector, the model rib area is located in the first grid model according to the opening angle of the fuel rod bundle rib structure area and the angle between the second vector and the target coordinate axis. The displacement vector and the coordinates of each node in the model rib area are fused to obtain the coordinates of each rib in the model rib area. The nodes in the model rib area are moved to the rib coordinates to obtain the target grid model with the rib bundle channel.

[0080] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0081] Based on the same inventive concept, embodiments of the present application also provide a device for constructing a structured grid for a ribbed rod cluster channel, for implementing the aforementioned method for constructing a structured grid for a ribbed rod cluster channel. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more embodiments of the device for constructing a structured grid for a ribbed rod cluster channel provided below can be found in the aforementioned definition of the method for constructing a structured grid for a ribbed rod cluster channel, and will not be further elaborated here.

[0082] In one embodiment, as shown in FIG6 , a ribbed rod bundle channel structured grid construction apparatus is provided, comprising: a first grid model construction module 302 , a displacement vector determination module 304 , and a target grid model generation module 306 , wherein:

[0083] A first mesh model building module 302 is configured to build a first mesh model of a fuel bundle without ribs based on first parameters of the fuel bundle;

[0084] a displacement vector determining module 304, configured to determine a displacement vector of a deformation node in a rib structure region according to a second parameter of the fuel bundle;

[0085] The target grid model generating module 306 is used to edit the nodes of the rib structure region in the first grid model according to the displacement vector to obtain a target grid model with ribbed rod bundle channels.

[0086] In one embodiment, the displacement vector determination module 304 is further configured to:

[0087] A three-dimensional coordinate system is established based on the center point of the bottom surface of the fuel rod of the fuel rod bundle and the central axis of the fuel rod; based on the radius of the fuel rod in the fuel rod bundle, the position of the rib center point and the rib radius, the first vector, second vector and third vector of the fuel rod in the fuel rod bundle in the three-dimensional coordinate system are obtained, wherein the first vector is used to describe the vector from the center point of the fuel rod to the node before deformation, the second vector is used to describe the vector from the center point of the fuel rod to the center point of the rib, and the third vector is used to describe the vector from the center point of the rib to the node after deformation; based on the first vector, the second vector and the third vector, the displacement vector of the deformed node in the rib structure area is determined.

[0088] In one embodiment, the displacement vector determination module 304 is further configured to:

[0089] The first vector is obtained by fusing the radius of the fuel rods in the fuel rod bundle and the angle between the first vector of the fuel rod bundle in the three-dimensional coordinate system and the target coordinate axis. The second vector is obtained by fusing the distance between the center point of the rib and the center point of the fuel rod in the fuel rod bundle and the angle between the second vector in the three-dimensional coordinate system and the target coordinate axis. The third vector is obtained by fusing the distance between the deformed node of the fuel rod in the fuel rod bundle and the center point of the rib according to the position of the rib center point and the angle between the third vector of the fuel rod bundle in the three-dimensional coordinate system and the target coordinate axis.

[0090] In one embodiment, the target grid model generation module 306 is further configured to:

[0091] The model rib region is located in the first mesh model according to the opening angle of the fuel bundle rib structure region and the angle between the second vector and the target coordinate axis. The nodes in the model rib region are edited according to the displacement vector to obtain the target mesh model with the ribbed rod bundle channel.

[0092] In one embodiment, the target grid model generation module 306 is further configured to:

[0093] The displacement vector and the coordinates of each node in the model rib area are fused to obtain the coordinates of each rib in the model rib area; each node in the model rib area is moved to the coordinates of each rib to obtain the target grid model with ribbed rod bundle channel.

[0094] In one embodiment, the first grid model building module 302 is further configured to:

[0095] A two-dimensional geometric model of the fuel rod bundle is established according to the radius and number of fuel rods in the fuel rod bundle; the two-dimensional geometric model is quadrilaterally meshed according to the grid structure of the fuel rod bundle to obtain a second mesh model; and the second mesh model is three-dimensionally stretched to obtain a first mesh model.

[0096] Each module in the aforementioned apparatus for constructing a structured grid of ribbed rod bundle channels can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor within a computer device in the form of hardware, or can be stored in a computer device's memory in the form of software, allowing the processor to call and execute the corresponding operations of each module.

[0097] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in FIG7 . The computer device includes a processor, a memory, and a network interface connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data required for constructing a structured grid of a ribbed rod bundle channel. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a method for constructing a structured grid of a ribbed rod bundle channel is implemented.

[0098] Those skilled in the art will understand that the structure shown in FIG7 is merely a block diagram of a portion of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0099] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0100] Based on the first parameters of the fuel rod bundle, a first mesh model without ribs is constructed. Based on the second parameters of the fuel rod bundle, the displacement vectors of the deformed nodes in the rib structure area are determined. Based on the displacement vectors, the nodes in the rib structure area in the first mesh model are edited to obtain a target mesh model with ribbed rod bundle channels.

[0101] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0102] A three-dimensional coordinate system is established based on the center point of the bottom surface of the fuel rod of the fuel rod bundle and the central axis of the fuel rod; based on the radius of the fuel rod in the fuel rod bundle, the position of the rib center point and the rib radius, the first vector, second vector and third vector of the fuel rod in the fuel rod bundle in the three-dimensional coordinate system are obtained, wherein the first vector is used to describe the vector from the center point of the fuel rod to the node before deformation, the second vector is used to describe the vector from the center point of the fuel rod to the center point of the rib, and the third vector is used to describe the vector from the center point of the rib to the node after deformation; based on the first vector, the second vector and the third vector, the displacement vector of the deformed node in the rib structure area is determined.

[0103] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0104] The first vector is obtained by fusing the radius of the fuel rods in the fuel rod bundle and the angle between the first vector of the fuel rod bundle in the three-dimensional coordinate system and the target coordinate axis. The second vector is obtained by fusing the distance between the center point of the rib and the center point of the fuel rod in the fuel rod bundle and the angle between the second vector in the three-dimensional coordinate system and the target coordinate axis. The third vector is obtained by fusing the distance between the deformed node of the fuel rod in the fuel rod bundle and the center point of the rib according to the position of the rib center point and the angle between the third vector of the fuel rod bundle in the three-dimensional coordinate system and the target coordinate axis.

[0105] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0106] The model rib region is located in the first mesh model according to the opening angle of the fuel bundle rib structure region and the angle between the second vector and the target coordinate axis. The nodes in the model rib region are edited according to the displacement vector to obtain the target mesh model with the ribbed rod bundle channel.

[0107] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0108] The displacement vector and the coordinates of each node in the model rib area are fused to obtain the coordinates of each rib in the model rib area; each node in the model rib area is moved to the coordinates of each rib to obtain the target grid model with ribbed rod bundle channel.

[0109] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0110] A two-dimensional geometric model of the fuel rod bundle is established according to the radius and number of fuel rods in the fuel rod bundle; the two-dimensional geometric model is quadrilaterally meshed according to the grid structure of the fuel rod bundle to obtain a second mesh model; and the second mesh model is three-dimensionally stretched to obtain a first mesh model.

[0111] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0112] Based on the first parameters of the fuel rod bundle, a first mesh model without ribs is constructed. Based on the second parameters of the fuel rod bundle, the displacement vectors of the deformed nodes in the rib structure area are determined. Based on the displacement vectors, the nodes in the rib structure area in the first mesh model are edited to obtain a target mesh model with ribbed rod bundle channels.

[0113] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0114] A three-dimensional coordinate system is established based on the center point of the bottom surface of the fuel rod of the fuel rod bundle and the central axis of the fuel rod; based on the radius of the fuel rod in the fuel rod bundle, the position of the rib center point and the rib radius, the first vector, second vector and third vector of the fuel rod in the fuel rod bundle in the three-dimensional coordinate system are obtained, wherein the first vector is used to describe the vector from the center point of the fuel rod to the node before deformation, the second vector is used to describe the vector from the center point of the fuel rod to the center point of the rib, and the third vector is used to describe the vector from the center point of the rib to the node after deformation; based on the first vector, the second vector and the third vector, the displacement vector of the deformed node in the rib structure area is determined.

[0115] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0116] The first vector is obtained by fusing the radius of the fuel rods in the fuel rod bundle and the angle between the first vector of the fuel rod bundle in the three-dimensional coordinate system and the target coordinate axis. The second vector is obtained by fusing the distance between the center point of the rib and the center point of the fuel rod in the fuel rod bundle and the angle between the second vector in the three-dimensional coordinate system and the target coordinate axis. The third vector is obtained by fusing the distance between the deformed node of the fuel rod in the fuel rod bundle and the center point of the rib according to the position of the rib center point and the angle between the third vector of the fuel rod bundle in the three-dimensional coordinate system and the target coordinate axis.

[0117] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0118] The model rib region is located in the first mesh model according to the opening angle of the fuel bundle rib structure region and the angle between the second vector and the target coordinate axis. The nodes in the model rib region are edited according to the displacement vector to obtain the target mesh model with the ribbed rod bundle channel.

[0119] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0120] The displacement vector and the coordinates of each node in the model rib area are fused to obtain the coordinates of each rib in the model rib area; each node in the model rib area is moved to the coordinates of each rib to obtain the target grid model with ribbed rod bundle channel.

[0121] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0122] A two-dimensional geometric model of the fuel rod bundle is established according to the radius and number of fuel rods in the fuel rod bundle; the two-dimensional geometric model is quadrilaterally meshed according to the grid structure of the fuel rod bundle to obtain a second mesh model; and the second mesh model is three-dimensionally stretched to obtain a first mesh model.

[0123] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0124] Based on the first parameters of the fuel rod bundle, a first mesh model without ribs is constructed. Based on the second parameters of the fuel rod bundle, the displacement vectors of the deformed nodes in the rib structure area are determined. Based on the displacement vectors, the nodes in the rib structure area in the first mesh model are edited to obtain a target mesh model with ribbed rod bundle channels.

[0125] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0126] A three-dimensional coordinate system is established based on the center point of the bottom surface of the fuel rod of the fuel rod bundle and the central axis of the fuel rod; based on the radius of the fuel rod in the fuel rod bundle, the position of the rib center point and the rib radius, the first vector, second vector and third vector of the fuel rod in the fuel rod bundle in the three-dimensional coordinate system are obtained, wherein the first vector is used to describe the vector from the center point of the fuel rod to the node before deformation, the second vector is used to describe the vector from the center point of the fuel rod to the center point of the rib, and the third vector is used to describe the vector from the center point of the rib to the node after deformation; based on the first vector, the second vector and the third vector, the displacement vector of the deformed node in the rib structure area is determined.

[0127] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0128] The first vector is obtained by fusing the radius of the fuel rods in the fuel rod bundle and the angle between the first vector of the fuel rod bundle in the three-dimensional coordinate system and the target coordinate axis. The second vector is obtained by fusing the distance between the center point of the rib and the center point of the fuel rod in the fuel rod bundle and the angle between the second vector in the three-dimensional coordinate system and the target coordinate axis. The third vector is obtained by fusing the distance between the deformed node of the fuel rod in the fuel rod bundle and the center point of the rib according to the position of the rib center point and the angle between the third vector of the fuel rod bundle in the three-dimensional coordinate system and the target coordinate axis.

[0129] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0130] The model rib region is located in the first mesh model according to the opening angle of the fuel bundle rib structure region and the angle between the second vector and the target coordinate axis. The nodes in the model rib region are edited according to the displacement vector to obtain the target mesh model with the ribbed rod bundle channel.

[0131] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0132] The displacement vector and the coordinates of each node in the model rib area are fused to obtain the coordinates of each rib in the model rib area; each node in the model rib area is moved to the coordinates of each rib to obtain the target grid model with ribbed rod bundle channel.

[0133] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0134] A two-dimensional geometric model of the fuel rod bundle is established according to the radius and number of fuel rods in the fuel rod bundle; the two-dimensional geometric model is quadrilaterally meshed according to the grid structure of the fuel rod bundle to obtain a second mesh model; and the second mesh model is three-dimensionally stretched to obtain a first mesh model.

[0135] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0136] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0137] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for constructing a structured grid of a ribbed rod bundle channel, wherein, The method includes: Constructing a first grid model of a fuel rod bundle without ribs according to a first parameter of the fuel rod bundle; Determining a displacement vector of a deformed node in a rib structure region according to a second parameter of the fuel rod bundle; Editing nodes in the rib structure region of the first grid model according to the displacement vector to obtain a target grid model of a ribbed rod bundle channel.

2. The method according to claim 1, wherein, The second parameter includes the radius of a fuel rod in the fuel rod bundle, the position of a rib center point, and the radius of the rib; the determining a displacement vector of a deformed node in a rib structure region according to the second parameter of the fuel rod bundle includes: Establishing a three-dimensional coordinate system according to the center point of the bottom surface of the fuel rod in the fuel rod bundle and the central axis of the fuel rod; Obtaining a first vector, a second vector, and a third vector of the fuel rod in the fuel rod bundle in the three-dimensional coordinate system according to the radius of the fuel rod in the fuel rod bundle, the position of the rib center point, and the radius of the rib, where the first vector is used to describe the vector from the center point of the fuel rod to the node before deformation, the second vector is used to describe the vector from the center point of the fuel rod to the center point of the rib, and the third vector is used to describe the vector from the center point of the rib to the node after deformation; Determining a displacement vector of a deformed node in a rib structure region according to the first vector, the second vector, and the third vector.

3. The method according to claim 2, wherein The obtaining a first vector, a second vector, and a third vector of a fuel rod bundle grid in the three-dimensional coordinate system according to the radius of the fuel rod in the fuel rod bundle, the position of the rib center point, and the radius of the rib includes: Fusing the radius of the fuel rod in the fuel rod bundle and the angle between the first vector of the fuel rod bundle and a target coordinate axis in the three-dimensional coordinate system to obtain the first vector; Fusing the distance between the rib center point and the fuel rod center point in the fuel rod bundle and the angle between the second vector and the target coordinate axis in the three-dimensional coordinate system to obtain the second vector; According to the position of the rib center point, fusing the distance between the deformed node of the fuel rod and the rib center point in the fuel rod bundle and the angle between the third vector of the fuel rod bundle and the target coordinate axis in the three-dimensional coordinate system to obtain the third vector.

4. The method according to claim 1, wherein The editing nodes in the rib structure region of the first grid model according to the displacement vector to obtain a target grid model of a ribbed rod bundle channel includes: Locating a model rib region in the first grid model according to the opening angle of the rib structure region of the fuel rod bundle and the angle between the second vector and the target coordinate axis; Editing nodes in the model rib region according to the displacement vector to obtain a target grid model of a ribbed rod bundle channel.

5. The method according to claim 4, wherein, The editing nodes in the model rib region according to the displacement vector to obtain a target grid model of a ribbed rod bundle channel includes: Fusing the displacement vector and the coordinates of each node in the model rib region to obtain the coordinates of each rib in the model rib region; Moving each node in the model rib region to each rib coordinate to obtain a target grid model of a ribbed rod bundle channel.

6. The method according to claim 1, wherein The first parameter includes the radius, quantity, and grid structure of the fuel rods in the fuel rod bundle; constructing a first mesh model of the fuel rod bundle without ribs according to the first parameter of the fuel rod bundle includes: Establishing a two-dimensional geometric model of the fuel rod bundle according to the radius and quantity of the fuel rods in the fuel rod bundle; Performing quadrilateral mesh division on the two-dimensional geometric model according to the grid structure of the fuel rod bundle to obtain a second mesh model; Performing three-dimensional stretching on the second mesh model to obtain a first mesh model.

7. A structured grid construction device for a ribbed rod bundle channel, wherein, The device includes: A first mesh model construction module, configured to construct a first mesh model of the fuel rod bundle without ribs according to the first parameter of the fuel rod bundle; A displacement vector determination module, configured to determine the displacement vector of the deformed nodes in the rib structure region according to the second parameter of the fuel rod bundle; A target mesh model generation module, configured to edit the nodes in the rib structure region of the first mesh model according to the displacement vector to obtain a target mesh model of the ribbed rod bundle channel.

8. A computer device, comprising a memory and a processor, the memory storing a computer program, wherein, When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, wherein, When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, wherein, When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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