Design method and equipment for turbine runner structure

Abstract

The invention belongs to the technical field of steam turbine blades, and discloses a design method and device for a turbine runner structure, and the method comprises the steps that steam inlet working condition parameters are collected; selecting a design variable, and determining an upper limit value and a lower limit value of the design variable as a design optimization set group; establishing a turbine blade structure simulation numerical model; setting parameters of the hydrogen-water vapor binary mixed working medium; calculating the thermal efficiency of the blade geometric model; and through regression fitting, obtaining a function relationship between thermal efficiency and blade structure parameters, and calculating and designing an optimal solution of a target function in the optimization set. The problems that an existing steam turbine runner is low in working efficiency in a hydrogen-steam combined cycle working medium, vortex is easily generated in the acting process, blades are damaged, and the service life of the blades is shortened can be solved.

Description

Technical Field

[0001] This invention belongs to the field of turbine blade technology, specifically relating to a design method and equipment for turbine flow channel structure. Background Technology

[0002] A turbine is a rotary thermal power machine that uses steam as its working fluid. Its main structure includes stationary blades, moving blades, a main shaft, and an outer casing. The stationary blades are fixed and installed into the shaft by a cylinder. The moving blades are mounted on the main shaft, with the moving blades evenly distributed in a ring along the radial direction of the main shaft. The outer side of the blades is the turbine casing, and the fluid passage is between the main shaft and the casing. Within the turbine's flow channel structure, the blades play a crucial role in the energy conversion process. The moving blades rotate under the influence of the fluid, driving the main shaft to rotate and perform work, thus converting the steam's thermal energy into the rotor's mechanical energy. The fluid flowing through the moving blades incurs energy loss due to the work done, causing the fluid velocity to decrease. Meanwhile, the stationary blades gradually contract, causing the fluid volume to expand, the pressure to decrease, and the velocity to increase, allowing it to flow through the next set of moving blades and continue driving the main shaft to perform work.

[0003] Currently, the hydrogen production process via water electrolysis inevitably generates a large amount of hydrogen-steam mixture, and the thermal energy in this mixture is often not fully utilized, resulting in waste. Separating the hydrogen from the steam also incurs significant costs. Existing turbine flow channel structures used in hydrogen-steam combined cycle systems suffer from low efficiency, are prone to generating eddies during operation that damage blades, and ultimately reduce blade life.

[0004] Chinese patent authorization number CN114382551B, entitled "A Steam Turbine Energy-Saving Method and Steam Turbine Blades and Energy-Saving Steam Turbine Structure," describes a structure comprising blades, stationary blade cascades, moving blade cascades, and a rotor. The energy-saving steam turbine blades are provided with internal cavities and ventilation slots. The blades are circumferentially spaced on the stationary and moving blade cascades, and the stationary and moving blade cascades are alternately spaced along the axial direction. The moving blade cascades are connected to the rotor. This patent application fails to solve the problem of low working efficiency of steam turbine blades in hydrogen-steam combined cycle working fluids. Summary of the Invention

[0005] To overcome the problems existing in the prior art, the present invention aims to provide a design method and equipment for turbine flow channel structure. By designing the turbine flow channel structure using the method of the present invention, the functional relationship between thermal efficiency and blade structure parameters is obtained through regression fitting. This solves the problems of low working efficiency of existing steam turbine flow channels in hydrogen-steam combined cycle working fluid, easy generation of eddies during the power process causing blade damage, and reduced blade life.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a design method for a turbine flow channel structure, comprising the following steps: Collect steam inlet operating parameters; Select design variables and determine the upper and lower limits of the design variables as the design optimization set; Establish a numerical simulation model of the turbine blade structure; Set the parameters for the hydrogen-water vapor binary working fluid; Calculate the thermal efficiency of the blade geometry model; By regression fitting, the functional relationship between thermal efficiency and blade structural parameters is obtained. The optimal solution of the objective function is obtained by calculating the design optimization set. The function of thermal efficiency and blade structural parameters is the regression equation of thermal efficiency with respect to blade height, blade width, installation angle and relative pitch.

[0007] Optionally, the thermal efficiency is a function of the blade structural parameters: R=a0+a1A+a2B-a3C-a4D+a5B*D+a6C*D-a7A 2 -a8B 2 +a9D 2 Where A, B, C, and D represent blade height, blade width, installation angle, and relative pitch, respectively; a0, a1, a2, a3, a4, a5, a6, a7, a8, and a9 are constants.

[0008] Optionally, the steam inlet parameters include steam velocity and inlet temperature.

[0009] Optionally, design variables include: blade characteristic structural parameters, moving blade installation angle, and relative pitch.

[0010] Optionally, a numerical model of the blade structure can be established using a structured mesh generation tool.

[0011] Optionally, the thermal efficiency of the blade geometry model can be calculated by collecting fluid flow parameters and temperature change parameters.

[0012] Secondly, the present invention provides a design system for a turbine flow channel structure, comprising: The data acquisition module is used to collect steam inlet operating parameters; The variable selection module is used to select design variables and determine the upper and lower limits of the design variables as the design optimization set. The modeling module is used to create numerical simulation models of turbine blade structures. The parameter setting module is used to set the parameters of the hydrogen-water vapor binary working fluid. The calculation module is used to calculate the thermal efficiency of the blade geometry model; The regression fitting module is used to obtain the functional relationship between thermal efficiency and blade structural parameters through regression fitting, and to obtain the optimal solution of the objective function in the design optimization set. The function of thermal efficiency and blade structural parameters is the regression equation of thermal efficiency with respect to blade height, blade width, installation angle and relative pitch.

[0013] Thirdly, the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement a design method for the turbine flow channel structure.

[0014] Fourthly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements a design method for the turbine flow channel structure.

[0015] Fifthly, the present invention provides a computer program product including a computer-readable medium, wherein computer-readable program code is included on the computer-readable medium, the program code executing the design method of the turbine flow channel structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The purpose of this invention is to provide a design method and device for turbine flow channel structures. Through regression fitting, a functional relationship between thermal efficiency and blade structural parameters is obtained, addressing the problems of low efficiency in existing turbine flow channels operating in hydrogen-steam combined cycle working media, the generation of eddies during the power process leading to blade damage, and reduced blade life. The turbine flow channel structure designed by this method is suitable for mixed working media in hydrogen-steam combined cycles and can operate stably within a hydrogen mass fraction range of 10%-90% in the hydrogen-steam mixture. Attached Figure Description

[0017] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way.

[0018] In the attached diagram: Figure 1 This is a flowchart of a design method for a turbine flow channel structure according to the present invention; Figure 2 It is the response surface of the four factors (Li, Bi, γi, tni) to isentropic efficiency; Figure 3 This is a model diagram of the primary flow channel of a steam turbine; Figure 4 This is an axial schematic diagram of a first-stage blade, where (a) is the stationary blade and (b) is the moving blade. Figure 5It is the overall mesh of the blade passage and the fine mesh of the wall boundary, where (a) is the stationary blade passage and (b) is the moving blade passage; Figure 6 The diagram shows the streamlines of the fluid at 50% leaf height, where (a) hydrogen concentration is 10%, (b) hydrogen concentration is 50%, and (c) hydrogen concentration is 90%. Figure 7 This is a static pressure distribution diagram at 50% leaf height, where (a) hydrogen concentration is 10%, (b) hydrogen concentration is 50%, and (c) hydrogen concentration is 90%. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] It should be noted that any reference signs placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. This application can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. The present invention will now be described in detail with reference to the accompanying drawings.

[0022] The present invention provides a design method for a turbine flow channel structure, comprising the following steps: Collect steam inlet operating parameters; Select design variables and determine the upper and lower limits of the design variables as the design optimization set; Establish a numerical simulation model of the turbine blade structure; Set the parameters for the hydrogen-water vapor binary working fluid; Calculate the thermal efficiency of the blade geometry model; By regression fitting, the functional relationship between thermal efficiency and blade structural parameters is obtained. The optimal solution of the objective function is obtained by calculating the design optimization set. The function of thermal efficiency and blade structural parameters is the regression equation of thermal efficiency with respect to blade height, blade width, installation angle and relative pitch.

[0023] This invention obtains the functional relationship between thermal efficiency and blade structural parameters through regression fitting, in order to solve the problems of low efficiency in existing steam turbine flow channels when operating in a hydrogen-steam combined cycle working medium, the easy generation of eddies during the power process causing blade damage, and the reduction of blade life.

[0024] Example 1 Reference Figure 1 The design method for a turbine flow channel structure according to an embodiment of the present invention is based on the Reynolds stress model (RSM) and a computational fluid dynamics (CFD) coupled algorithm, including: 1) Given the steam intake operating parameters.

[0025] 2) Select optimization variables and determine the upper and lower limits of the design variables as the design optimization set; 3) Based on the ANSYS software, a blade geometry generator software is used to create a blade geometry generator. i The blade geometry model was created, and the blade mesh was built using the turbomachinery mesh generator software based on ANSYS software. i Numerical model for turbine blade structure simulation.

[0026] 4) Import the solution into the ANSYS CFX fluid dynamics calculation software and set it as a binary working medium of hydrogen and water vapor.

[0027] 5) Solve the thermal efficiency η of the blade geometric model based on ANSYS CFX fluid dynamics calculation software.

[0028] 6) By regression fitting, the functional relationship between thermal efficiency η and blade structural parameters is obtained, thereby obtaining the optimal solution of the objective function from the above design optimization set.

[0029] 7) Compare whether the above optimal solutions are valid.

[0030] In this embodiment of the invention, the turbine flow channel structure is a turbine flow channel structure for a hydrogen-steam combined cycle. The shape profile of the basic blade is changed by using a four-factor, three-level experimental design based on the response surface methodology (Box-Behnken), thereby improving the thermal efficiency of the hydrogen-steam combined cycle turbine.

[0031] The obtained optimal solution is compared with other optimization sets (design optimization set experiments are conducted using the response surface methodology).

[0032] In this embodiment, in the step of giving the steam inlet operating parameters, the steam inlet operating parameters are set as steam velocity of 40m / s and inlet temperature of 451℃.

[0033] In this embodiment, in the step of selecting optimization variables, the design variables include the moving blade height L among the blade characteristic structure parameters. i Leaf width B i And the installation angle γ of the moving blade i and relative pitch tn i .

[0034] In this embodiment, the thermal efficiency of the geometric model is adopted as the isentropic efficiency η of the steam turbine. i .

[0035] In this embodiment, the design region for determining the upper and lower limits of the above design variables is selected, and the reference basic blade geometry is selected in the step of designing the optimization set.

[0036] Among them, the moving blade airfoil is selected as HQ-1 airfoil, and the corresponding stationary blade airfoil is selected as HQ-2. The geometric feature range of the basic blade cascade is shown in Table 1.

[0037] Table 1

[0038] Furthermore, based on the geometric characteristics of the basic blade cascades HQ-1 and HQ-2, the moving blade height L is 23 mm or more and 27 mm or less, the moving blade width B is 18 mm or more and 23 mm or less, the moving blade installation angle γ is 77 degrees or more and 79 degrees or less, and the moving blade relative pitch tn is 0.6 mm or more and 0.8 mm or less.

[0039] In this embodiment, an optimized set group is set: (L i B i α i (i=1, 2, ... 29) to obtain the optimal solution for the isentropic efficiency of the leaf cascade, as shown in Table 2.

[0040] Table 2

[0041] In this embodiment, a blade is built based on the selected blade cascade geometry parameters using the BladeGen module of ANSYS software. i (L) i B i ,γ i ,tn i Geometric model and blade creation based on the turbogrid module of ANSYS software. i Numerical model.

[0042] In this embodiment, a binary working medium of hydrogen and water vapor is set. The working medium is a mixture with fixed components, namely 50% water vapor and 50% hydrogen. The corresponding gas composition is selected in ANSYS CFX software to form the binary working medium.

[0043] In this embodiment, ANSYS CFX software is imported to solve the Bladei(L) cascade. i B i ,γ i ,tn i The isentropic efficiency of the blade was obtained by regression fitting, which yielded the functional relationship between the thermal efficiency η and the blade structural parameters. , , Thus, the optimal solution of the objective function (L0, B) is obtained from the above design region. O ,α0).

[0044] In this embodiment, the optimal solution based on the isentropic efficiency of the steam turbine is L0=26mm, B0=23mm, γ0=79°, tn0=0.8. The optimized blade cascade geometry parameters are shown in Table 3. Table 3

[0045] In this embodiment, the validity of the above optimal solution is verified by calculating the blade structure parameters (L0, B0, γ0, tn0) and conducting numerical analysis to obtain the turbine's isentropic efficiency for comparison.

[0046] Table 2 lists the isentropic efficiencies of the 29 experimental groups. As can be seen from the table, Optimal isentropic efficiency: Experiment 20 has the highest isentropic efficiency value: 0.674743.

[0047] Minimum isentropic efficiency: Experiment 11 has the minimum isentropic efficiency value: 0.593267.

[0048] Isoentropy efficiency improvement calculation: Percentage increase =

[0049] Substitute the values ​​into the calculation: Percentage increase =

[0050] According to Table 2, in this embodiment, the optimized isentropic efficiency is 0.674743.

[0051] Compared to other experimental groups, it improved by approximately 13.73%.

[0052] Reference Figure 3 and Figure 4 Based on the numerical simulation results of the above response surface method, the first-stage static and dynamic blades of the steam turbine were accurately modeled using the BladeGen module of ANSYS software.

[0053] The turbine flow channel structure of the hydrogen-steam combined cycle in this embodiment of the invention includes a stationary blade cascade, a moving blade cascade, a hub, and an impeller cover.

[0054] In this embodiment, when the steam turbine performs work, the moving blades rotate under the action of the fluid, driving the main shaft to rotate and perform work, thereby converting the steam's thermal energy into the rotor's mechanical energy. The work done by the fluid flowing through the moving blades causes energy loss, resulting in a decrease in fluid velocity. Meanwhile, the stationary blades gradually contract, causing the fluid volume to expand, the pressure to decrease, and the velocity to increase, allowing it to flow through the next set of moving blades and continue driving the main shaft to perform work.

[0055] Reference Figure 4 The aforementioned stationary and moving blades are all composed of an inlet edge, a back arc, an inner arc, and an outlet edge connected end to end. The working parts of several of these blades are all straight blades with a uniform cross-section.

[0056] In this embodiment, the distance between the steam inlet boundary and the leading edge of the stationary blade in the first-stage turbine flow channel of the aforementioned hydrogen-steam combined cycle is 15 mm, and the distance between the steam outlet boundary and the trailing edge of the moving blade is 16 mm. The moving blade has a height L1 = 16 mm, axial width B1 = 13 mm, chord length H1 = 15.8 mm, geometric inlet angle α1 = -25°, installation angle β1 = -35°, blade thickness 3.2 mm, outlet edge thickness 0.4 mm, and inlet edge thickness 0.8 mm. A tip clearance of 0.8 mm is provided at the tip of the moving blade to ensure flow field stability. The stationary blade cascade is arranged ahead of the moving blade cascade along the flow direction of the channel. The stationary blade has a height L2 = 15 mm, axial width B2 = 12.5 mm, chord length H2 = 14 mm, geometric inlet angle α2 = 90°, installation angle β2 = -35°, maximum thickness 3.2 mm, and a 1 mm gap between the tail end of the outlet edge and the main shaft.

[0057] Reference Figure 5The topology and mesh were generated using TurboGrid in ANSYS software, and the mesh was refined at the boundary layer. The number of meshes was adjusted by adjusting the Size Factor in ANSYS software, and the mesh quality was analyzed based on Mesh Analysis.

[0058] In this embodiment, based on the mesh independence verification, when the stationary blade mesh count is 1.5 million and the moving blade surface mesh count is 1.5 million, the exit velocity no longer changes with the increase of the mesh count. Therefore, a mesh count of 3 million is used for further calculation and analysis.

[0059] Reference Figure 7 Ten different mixing ratios were simulated for constant flow to study the flow characteristics within the turbine stage, and the surface pressure and vortex generation on the blades during blade cascade work were further discussed.

[0060] In this embodiment, 10 H2O to H2 mixing ratios were simulated, with the mass fraction of hydrogen set to 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%, respectively.

[0061] In this embodiment, the optimized blade performs work in the working fluid of the hydrogen-steam combined cycle. When the hydrogen composition ratio varies within the range of 10%-90%, the pressure distribution curve on the blade surface is smooth, and the load changes uniformly from the blade root to the blade tip. Observing the fluid streamline diagram at 50% blade height, no eddies are generated, and the fluid can flow smoothly along the blade. This reduces the problem of blade flutter caused by eddies.

[0062] Example 2 The purpose of this embodiment is to provide a design system for turbine flow channel structures, including: The data acquisition module is used to collect steam inlet operating parameters; The variable selection module is used to select design variables and determine the upper and lower limits of the design variables as the design optimization set. The modeling module is used to create numerical simulation models of turbine blade structures. The parameter setting module is used to set the parameters of the hydrogen-water vapor binary working fluid. The calculation module is used to calculate the thermal efficiency of the blade geometry model; The regression fitting module is used to obtain the functional relationship between thermal efficiency and blade structural parameters through regression fitting, and to obtain the optimal solution of the objective function in the design optimization set. The function of thermal efficiency and blade structural parameters is the regression equation of thermal efficiency with respect to blade height, blade width, installation angle and relative pitch.

[0063] Example 3 The purpose of this embodiment is to provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement a design method for the turbine flow channel structure.

[0064] Example 4 The purpose of this embodiment is to provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the design method of the turbine flow channel structure.

[0065] Example 5 The purpose of this embodiment is to provide a computer program product including a computer-readable medium, wherein the computer-readable medium contains computer-readable program code that executes the design method of the turbine flow channel structure.

[0066] The steps and methods involved in the apparatus of the above embodiments 2, 3, 4 and 5 correspond to those in embodiment 1. For specific implementation methods, please refer to the relevant description section of embodiment 1.

[0067] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes. These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1The function specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0068] Unless otherwise specified, the working methods or control methods involved in the above embodiments are conventional working methods or control methods in the art.

[0069] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A design method for a turbine flow channel structure, characterized in that, Includes the following steps: Collect steam inlet operating parameters; Select design variables and determine the upper and lower limits of the design variables as the design optimization set; Establish a numerical simulation model of the turbine blade structure; Set the parameters for the hydrogen-water vapor binary working fluid; Calculate the thermal efficiency of the blade geometry model; By regression fitting, the functional relationship between thermal efficiency and blade structural parameters is obtained. The optimal solution of the objective function is obtained by calculating the design optimization set. The function of thermal efficiency and blade structural parameters is the regression equation of thermal efficiency with respect to blade height, blade width, installation angle and relative pitch.

2. The design method for a turbine flow channel structure according to claim 1, characterized in that, The function of thermal efficiency and blade structural parameters is: R=a0+a1A+a2B-a3C-a4D+a5B*D+a6C*D-a7A 2 -a8B 2 +a9D 2 Where A, B, C, and D represent blade height, blade width, installation angle, and relative pitch, respectively; a0, a1, a2, a3, a4, a5, a6, a7, a8, and a9 are constants.

3. The design method for a turbine flow channel structure according to claim 1, characterized in that, The steam inlet parameters include steam velocity and inlet temperature.

4. The design method for a turbine flow channel structure according to claim 1, characterized in that, Design variables include: blade characteristic structural parameters, moving blade installation angle, and relative pitch.

5. The design method for a turbine flow channel structure according to claim 1, characterized in that, A numerical model of the blade structure was established using a structured mesh generation tool.

6. The design method for a turbine flow channel structure according to claim 1, characterized in that, The thermal efficiency of the blade geometry model is calculated by collecting fluid flow parameters and temperature change parameters.

7. A design system for a turbine flow channel structure, characterized in that, include: The data acquisition module is used to collect steam inlet operating parameters; The variable selection module is used to select design variables and determine the upper and lower limits of the design variables as the design optimization set. The modeling module is used to create numerical simulation models of turbine blade structures. The parameter setting module is used to set the parameters of the hydrogen-water vapor binary working fluid. The calculation module is used to calculate the thermal efficiency of the blade geometry model; The regression fitting module is used to obtain the functional relationship between thermal efficiency and blade structural parameters through regression fitting, and to obtain the optimal solution of the objective function in the design optimization set. The function of thermal efficiency and blade structural parameters is the regression equation of thermal efficiency with respect to blade height, blade width, installation angle and relative pitch.

8. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the design method of the turbine flow channel structure according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the design method of the turbine flow channel structure according to any one of claims 1-6.

10. A computer program product comprising a computer-readable medium, characterized in that, The computer-readable medium contains computer-readable program code that performs the design method of the turbine flow channel structure according to any one of claims 1-6.

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