A method and apparatus for performance analysis of turbine runner blades

Abstract

This invention relates to the field of resource recycling technology, and in particular to a method and apparatus for performance analysis of turbine runner blades. The method includes: acquiring pressure distribution maps, vorticity distribution maps, equivalent static stress distribution maps, and displacement distribution maps of the runner blades; processing the pressure distribution maps, vorticity distribution maps, equivalent static stress distribution maps, and displacement distribution maps of the runner blades respectively to obtain processing results; analyzing the performance of the runner blades based on the processing results to obtain analysis results; and then drawing pressure distribution maps, vorticity distribution maps, equivalent static stress distribution maps, and displacement distribution maps for improved runner blades. After processing these data distribution maps, the status of each data point is obtained, and by comparing them with their respective corresponding thresholds, it is determined whether the performance has been improved, thereby improving the efficiency of performance analysis.

Description

Technical Field

[0001] This invention relates to the field of resource recycling technology, and in particular to a method and apparatus for performance analysis of turbine runner blades. Background Technology

[0002] The structure of turbine runner blades directly affects hydraulic efficiency and plays a decisive role in hydraulic recovery. Therefore, by constructing a turbine runner blade model and adjusting the turbine runner blade structure, hydraulic efficiency can be improved.

[0003] However, when analyzing the performance of the adjusted turbine runner blade structure, most methods involve applying it to the turbine to observe its efficiency. However, this places extremely high demands on the observers and is not suitable for most ordinary personnel.

[0004] Therefore, how to analyze the performance of the optimized turbine runner blades is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] In view of the above problems, the present invention is proposed to provide a method and apparatus for performance analysis of turbine runner blades that overcomes or at least partially solves the above problems.

[0006] In a first aspect, the present invention provides a method for performance analysis of turbine runner blades, comprising:

[0007] Obtain the pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the runner blades;

[0008] The pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the runner blades are processed to obtain the processing results.

[0009] Based on the processing results, the performance of the impeller blades is analyzed, and the analysis results are obtained.

[0010] Furthermore, the acquisition of the pressure distribution map, vorticity distribution map, equivalent static stress distribution map, blade deformation distribution map, and displacement distribution map of the turbine blade includes:

[0011] Obtain the first pressure distribution map of the pressure surface and the second pressure distribution map of the suction surface of the impeller blade, the first vorticity distribution map of the pressure surface and the second vorticity distribution map of the suction surface, the first equivalent static stress distribution map of the pressure surface and the second equivalent static stress distribution map of the suction surface, as well as the first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface.

[0012] Furthermore, the pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the impeller blade are processed to obtain the processing results, including:

[0013] The first pressure distribution map of the pressure surface and the second pressure distribution map of the suction surface are processed to determine whether the area of ​​the region on the pressure surface that is higher than the first preset pressure is smaller than the first preset area, whether the area of ​​the region on the suction surface that is lower than the second preset pressure is smaller than the second preset area, and whether the first preset pressure is greater than the second preset pressure, so as to obtain the first processing result.

[0014] The first vorticity distribution map of the pressure surface and the second vorticity distribution map of the suction surface are processed to determine whether the area of ​​the region with positive vorticity on the pressure surface is greater than the third preset area and whether the area of ​​the region with negative vorticity on the suction surface is less than the fourth preset area. The third preset area and the fourth preset area are determined based on the vorticity distribution map of the impeller blade before optimization, and the second processing result is obtained.

[0015] The distribution maps of the first equivalent static stress of the pressure surface and the second equivalent static stress of the suction surface are processed to determine whether the equivalent static stress of the pressure surface and the suction surface in the region near the wheel rim at the water outlet, the part of the region near the wheel hub at the inlet, and the middle region of the blade are all less than the threshold corresponding to their respective regions. The threshold corresponding to each region is determined based on the equivalent static stress map of the impeller blade before the improvement, and a third processing result is obtained.

[0016] The first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface are processed to determine whether the degree of distortion of the pressure surface and the suction surface is lower than the distortion threshold, and a fourth processing result is obtained.

[0017] Further, the processing of the first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface to determine whether the degree of distortion of the pressure surface and the suction surface is lower than the distortion threshold, to obtain a fourth processing result, includes:

[0018] The first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface are processed to obtain the area of ​​the region where the displacement is greater than the first displacement threshold and the area of ​​the region where the displacement is less than the second displacement threshold.

[0019] Based on the area of ​​the region where the displacement is greater than the first displacement threshold and the area of ​​the region where the displacement is less than the second displacement threshold, it is determined whether the degree of distortion of the pressure surface and the suction surface is lower than the distortion threshold, and a fourth processing result is obtained.

[0020] Furthermore, based on the processing results, the performance of the runner blades is analyzed to obtain the analysis results, including:

[0021] When at least one of the first, second, third, and fourth processing results is true, the performance improvement of the impeller blade is determined.

[0022] Further, determining the performance improvement of the impeller blade when at least one of the first, second, third, and fourth processing results is yes includes:

[0023] If any one of the first, second, third, and fourth processing results is true, it is determined that the performance of the impeller blade has been improved by one level.

[0024] If two of the first, second, third, and fourth processing results are true, it is determined that the performance of the impeller blade has been improved in two stages.

[0025] If three of the first, second, third, and fourth processing results are true, it is determined that the performance of the rotor blade has been improved by three levels.

[0026] When four of the first, second, third, and fourth processing results are true, it is determined that the performance of the impeller blade has been improved in four stages, with the improvement effects of the first, second, third, and fourth stages increasing sequentially.

[0027] Furthermore, after analyzing the performance of the impeller blades based on the processing results and obtaining the analysis results, the process further includes:

[0028] Based on the analysis results, the degree of optimization of the runner blades is determined.

[0029] Secondly, the present invention also provides a performance analysis device for turbine runner blades, comprising:

[0030] The acquisition module is used to acquire the pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the runner blades.

[0031] The processing module is used to process the pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the impeller blades respectively to obtain the processing results;

[0032] The module is used to analyze the performance of the impeller blades based on the processing results and obtain the analysis results.

[0033] Thirdly, the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the program to implement the steps of the method described in the first aspect.

[0034] Fourthly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, characterized in that the program, when executed by a processor, implements the steps of the method described in the first aspect.

[0035] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0036] This invention provides a performance analysis method for turbine runner blades, comprising: acquiring pressure distribution maps, vorticity distribution maps, equivalent static stress distribution maps, and displacement distribution maps of the runner blades; processing the pressure distribution maps, vorticity distribution maps, equivalent static stress distribution maps, and displacement distribution maps of the runner blades respectively to obtain processing results; analyzing the performance of the runner blades based on the processing results to obtain analysis results; furthermore, by plotting pressure distribution maps, vorticity distribution maps, equivalent static stress distribution maps, and displacement distribution maps of improved runner blades, and by processing these data distribution maps to obtain the status of each data item, comparing them with their respective corresponding thresholds to determine whether the performance has been improved, thereby improving the efficiency of performance analysis. Attached Figure Description

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0038] Figure 1 A schematic flowchart of the performance analysis method for turbine runner blades in an embodiment of the present invention is shown;

[0039] Figure 2a A schematic diagram of the pressure distribution on the pressure surface of the impeller blades in an embodiment of the present invention is shown;

[0040] Figure 2b A schematic diagram of the pressure distribution on the suction surface of the impeller blades in an embodiment of the present invention is shown;

[0041] Figure 3a A schematic diagram of the vortex distribution on the pressure surface of the impeller blades in an embodiment of the present invention is shown;

[0042] Figure 3b A schematic diagram of the vortex distribution on the suction surface of the impeller blades in an embodiment of the present invention is shown;

[0043] Figure 4a A schematic diagram of the equivalent static stress distribution on the pressure surface of the impeller blade in an embodiment of the present invention is shown.

[0044] Figure 4b A schematic diagram of the equivalent static stress distribution on the suction surface of the impeller blades in an embodiment of the present invention is shown.

[0045] Figure 5a A schematic diagram of the displacement distribution of the pressure surface of the impeller blades in an embodiment of the present invention is shown;

[0046] Figure 5b A schematic diagram of the displacement distribution of the suction surface of the impeller blades in an embodiment of the present invention is shown;

[0047] Figure 6 A schematic diagram of a performance analysis device for turbine runner blades in an embodiment of the present invention is shown;

[0048] Figure 7 A schematic diagram of the computer equipment structure for implementing the performance analysis method of turbine runner blades in an embodiment of the present invention is shown. Detailed Implementation

[0049] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0050] Example 1

[0051] Embodiments of the present invention provide a method for performance analysis of turbine runner blades, such as... Figure 1 As shown, it includes:

[0052] S101, obtain the pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the runner blade;

[0053] S102, The pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram and displacement distribution diagram of the runner blade are processed respectively to obtain the processing results;

[0054] S103. Based on the processing results, the performance of the runner blades is analyzed, and the analysis results are obtained.

[0055] First, the turbine runner blades are located between the guide vane region and the outlet section. By adjusting the structure of the turbine runner blades, improved runner blades are obtained, which are used to improve the hydraulic efficiency of the turbine.

[0056] Next, the performance of the improved rotor blade will be analyzed to determine whether the performance of the rotor blade has been improved.

[0057] First, execute S101 to obtain the pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the runner blades.

[0058] Specifically, it involves obtaining a first pressure distribution map of the pressure surface and a second pressure distribution map of the suction surface of the impeller blade, a first vorticity distribution map of the pressure surface and a second vorticity distribution map of the suction surface, a first equivalent static stress distribution map of the pressure surface and a second equivalent static stress distribution map of the suction surface, a first displacement distribution map of the pressure surface and a second displacement distribution map of the suction surface.

[0059] Specifically, the pressure surface is the side of the blade that applies pressure to the liquid surface; the suction surface is the side of the fluid that impacts the blade due to the reduced pressure.

[0060] Specifically, such as Figure 2a The image shows the first pressure distribution diagram of the pressure surface. Figure 2b The diagram shows the second pressure distribution on the suction surface.

[0061] It can be seen that the high-pressure zone 201 on the pressure surface is relatively small, while the pressure distribution in other areas is relatively uniform; the low-pressure zone 202 on the suction surface is also relatively small. When the water flows in the forward direction, that is, when the water flows from the inlet side to the outlet side of the blade, the pressure gradient on both the pressure and suction surfaces continuously decreases.

[0062] Specifically, such as Figure 3a The diagram shown is the first vorticity distribution of the pressure surface. Figure 3b The diagram shows the second vorticity distribution of the suction surface.

[0063] It can be seen that the vorticity values ​​of the pressure surface include both positive and negative regions, while the vorticity data of the suction surface also include both positive and negative regions.

[0064] Specifically, such as Figure 4a The diagram shown is the first equivalent static stress distribution diagram of the pressure surface and Figure 4b The diagram shows the second equivalent static stress distribution on the suction surface.

[0065] The equivalent static stress on the pressure and suction surfaces is less than the threshold values ​​corresponding to each region, specifically in the region 401 near the wheel rim at the outlet, the region 402 near the hub at the inlet, and the central region 403 at the blade.

[0066] Since the equivalent static stress is related to the deformation, the deformation distribution diagram of the turbine blade is related to the equivalent static stress distribution. Figure 1 Sample.

[0067] Specifically, such as Figure 5aThe diagram shows the first displacement distribution of the pressure surface and Figure 5b The second displacement distribution diagram of the suction surface.

[0068] It can be seen that the region 502 with small displacement on the pressure surface and suction surface is larger, while the region 501 with large displacement is smaller.

[0069] Since the aforementioned multiple distribution diagrams can display the pressure, vorticity, equivalent static stress, and displacement of the improved turbine blades, the computer can perform image processing on these diagrams to determine whether each condition is met, thereby obtaining the processing result.

[0070] Specifically, S102 is executed to process the pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the runner blades, respectively, and obtain the processing results.

[0071] In a specific implementation, S102 includes:

[0072] The first pressure distribution map of the pressure surface and the second pressure distribution map of the suction surface are processed to determine whether the area of ​​the region on the pressure surface that is higher than the first preset pressure is smaller than the first preset area, whether the area of ​​the region on the suction surface that is lower than the second preset pressure is smaller than the second preset area, and whether the first preset pressure is greater than the second preset pressure, so as to obtain the first processing result.

[0073] The first vorticity distribution map of the pressure surface and the second vorticity distribution map of the suction surface are processed to determine whether the area of ​​the region with positive vorticity on the pressure surface is greater than the third preset area, and whether the area of ​​the region with negative vorticity on the suction surface is less than the fourth preset area. The third preset area and the fourth preset area are determined based on the vorticity distribution map of the impeller blade before optimization, and the second processing result is obtained.

[0074] The distribution maps of the first equivalent static stress of the pressure surface and the second equivalent static stress of the suction surface are processed to determine whether the equivalent static stress of the pressure surface and the suction surface in the region near the wheel rim at the water outlet, the part of the region near the wheel hub at the inlet, and the middle region of the blade are all less than the threshold corresponding to their respective regions, and a third processing result is obtained.

[0075] The first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface are processed to determine whether the degree of distortion of the pressure surface and the suction surface is lower than the distortion threshold, and a fourth processing result is obtained.

[0076] First, for the pressure distribution map, image processing can be used to determine whether the area of ​​the region on the pressure surface above the first preset pressure is smaller than the first preset area, and whether the area of ​​the region on the suction surface below the second preset pressure is smaller than the second preset area. If the first preset pressure is greater than the second preset pressure, a first processing result is obtained. The first preset area is determined based on the area of ​​the high-pressure region on the impeller blades before the improvement, and the second preset area is determined based on the area of ​​the low-pressure region on the impeller blades before the improvement.

[0077] Therefore, on the improved impeller blades, when the area of ​​the pressure surface above the first preset pressure is smaller than the first preset area, and the area of ​​the suction surface below the second preset pressure is smaller than the second preset area, it is determined that the high-pressure area of ​​the improved impeller blades is reduced, the low-pressure area is also reduced, the pressure is more uniform, and the pressure aspect is improved.

[0078] For the vorticity distribution diagram, through image processing, when the area of ​​the first region 301 with positive vorticity on the pressure surface is greater than the third preset area, and the area of ​​the second region 302 with negative vorticity on the suction surface is less than the fourth preset area, where the third and fourth preset areas are determined based on the vorticity distribution diagram of the impeller blade before the improvement, it is determined that the energy dissipation of the improved impeller blade is lower, thus enhancing the energy exchange capacity between the fluid and the impeller blade.

[0079] For the equivalent static stress distribution map, image processing was used to determine that the equivalent static stress on the pressure and suction surfaces in regions 401 near the rim at the outlet, 402 near the hub at the inlet, and 403 in the middle of the blade were all less than their respective threshold values. This resulted in a reduction in the optimized equivalent static stress, thus reducing the degree of blade damage.

[0080] For the displacement distribution map, image processing is used to obtain the area of ​​the region where the displacement is greater than the first displacement threshold and the area of ​​the region where the displacement is less than the second displacement threshold. It is then determined whether the degree of distortion of the pressure surface and the suction surface is lower than the distortion threshold, and a fourth processing result is obtained.

[0081] Specifically, when the area of ​​the region with a displacement greater than the first displacement threshold is less than the fifth preset area, and the area of ​​the region with a displacement less than the second displacement threshold is greater than the sixth preset area, it is determined that the area with a larger displacement decreases and the area of ​​the region with a smaller displacement increases, indicating that the degree of distortion has decreased.

[0082] Finally, S103 is executed, and based on the processing results, the performance of the runner blades is analyzed to obtain the analysis results.

[0083] Specifically, when at least one of the first, second, third, and fourth processing results is true, the performance improvement of the runner blade is determined.

[0084] In other words, if any of the results obtained from any of the above processing steps is "yes," then the performance of the runner blade is determined to have improved. The level of performance improvement is determined based on the number of "yes" results.

[0085] If only one of the first, second, third, and fourth processing results is true, it is determined that the performance of the runner blade has been improved by one level.

[0086] If two of the first, second, third, and fourth processing results are true, it is determined that the performance of the runner blade has been improved in two stages.

[0087] If three out of the first, second, third, and fourth processing results are true, it is determined that the performance of the runner blade has been improved in three stages.

[0088] When four out of the first, second, third, and fourth processing results are true, it is determined that the performance of the rotor blade has been improved in four stages, with the improvement effects of the first, second, third, and fourth stages increasing sequentially.

[0089] In other words, the more "yes" results there are, the higher the level of performance improvement of the rotor blade.

[0090] After obtaining the analysis results, the process also includes: determining the degree of optimization of the runner blades based on the analysis results. The higher the improvement level, the higher the degree of optimization of the runner blades.

[0091] The above method can be used to analyze the performance of the improved impeller blades and determine their effectiveness.

[0092] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0093] This invention provides a performance analysis method for turbine runner blades, comprising: acquiring pressure distribution maps, vorticity distribution maps, equivalent static stress distribution maps, and displacement distribution maps of the runner blades; processing the pressure distribution maps, vorticity distribution maps, equivalent static stress distribution maps, and displacement distribution maps of the runner blades respectively to obtain processing results; analyzing the performance of the runner blades based on the processing results to obtain analysis results; furthermore, by plotting pressure distribution maps, vorticity distribution maps, equivalent static stress distribution maps, and displacement distribution maps of improved runner blades, and by processing these data distribution maps to obtain the status of each data item, comparing them with their respective corresponding thresholds to determine whether the performance has been improved, thereby improving the efficiency of performance analysis.

[0094] Example 2

[0095] Based on the same inventive concept, this invention also provides a performance analysis device for turbine runner blades. Figure 6 As shown, it includes:

[0096] The acquisition module 601 is used to acquire the pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the runner blades.

[0097] Processing module 602 is used to process the pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram and displacement distribution diagram of the impeller blade respectively to obtain the processing results;

[0098] The module 603 is used to analyze the performance of the impeller blades based on the processing results and obtain the analysis results.

[0099] In one alternative implementation, the acquisition module 601 is used to:

[0100] Obtain the first pressure distribution map of the pressure surface and the second pressure distribution map of the suction surface of the impeller blade, the first vorticity distribution map of the pressure surface and the second vorticity distribution map of the suction surface, the first equivalent static stress distribution map of the pressure surface and the second equivalent static stress distribution map of the suction surface, as well as the first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface.

[0101] In one optional implementation, the processing module 602 includes:

[0102] The first processing unit is used to process the first pressure distribution map of the pressure surface and the second pressure distribution map of the suction surface, determine whether the area of ​​the region on the pressure surface that is higher than the first preset pressure is less than the first preset area, whether the area of ​​the region on the suction surface that is lower than the second preset pressure is less than the second preset area, and whether the first preset pressure is greater than the second preset pressure, and obtain the first processing result.

[0103] The second processing unit is used to process the first vorticity distribution map of the pressure surface and the second vorticity distribution map of the suction surface, and to determine whether the area of ​​the region with positive vorticity value on the pressure surface is greater than the third preset area, and whether the area of ​​the region with negative vorticity value on the suction surface is less than the fourth preset area. The third preset area and the fourth preset area are determined based on the vorticity distribution map of the impeller blade before optimization, and the second processing result is obtained.

[0104] The third processing unit is used to process the first equivalent static stress distribution diagram of the pressure surface and the second equivalent static stress distribution diagram of the suction surface, and to determine whether the equivalent static stress of the pressure surface and the suction surface in the region near the wheel rim at the water outlet, the part of the region near the wheel hub at the inlet, and the middle region of the blade is less than the threshold corresponding to each region. The threshold corresponding to each region is determined based on the equivalent static stress diagram of the impeller blade before the improvement, and the third processing result is obtained.

[0105] The fourth processing unit is used to process the first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface, determine whether the degree of distortion of the pressure surface and the suction surface is lower than the distortion threshold, and obtain the fourth processing result.

[0106] In one optional implementation, the fourth processing unit is used for:

[0107] The first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface are processed to obtain the area of ​​the region where the displacement is greater than the first displacement threshold and the area of ​​the region where the displacement is less than the second displacement threshold. Based on the area of ​​the region where the displacement is greater than the first displacement threshold and the area of ​​the region where the displacement is less than the second displacement threshold, it is determined whether the degree of distortion of the pressure surface and the suction surface is lower than the distortion threshold, and a fourth processing result is obtained.

[0108] In one alternative implementation, module 603 is obtained, which is used for:

[0109] When at least one of the first, second, third, and fourth processing results is true, the performance improvement of the impeller blade is determined.

[0110] In one alternative implementation, module 603 is specifically used for:

[0111] If any one of the first, second, third, and fourth processing results is true, it is determined that the performance of the impeller blade has been improved by one level.

[0112] If two of the first, second, third, and fourth processing results are true, it is determined that the performance of the impeller blade has been improved in two stages.

[0113] If three of the first, second, third, and fourth processing results are true, it is determined that the performance of the rotor blade has been improved by three levels.

[0114] When four of the first, second, third, and fourth processing results are true, it is determined that the performance of the impeller blade has been improved in four stages, with the improvement effects of the first, second, third, and fourth stages increasing sequentially.

[0115] In one alternative implementation, it further includes a determining module, configured to:

[0116] Based on the analysis results, the degree of optimization of the runner blades is determined.

[0117] Example 3

[0118] Based on the same inventive concept, embodiments of the present invention provide a computer device, such as... Figure 7 As shown, it includes a memory 704, a processor 702, and a computer program stored in the memory 704 and executable on the processor 702. When the processor 702 executes the program, it implements the steps of the above-described performance analysis method for turbine runner blades.

[0119] Among them, Figure 7 In this document, a bus architecture (represented by bus 700) is used. Bus 700 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 702 and memory represented by memory 704. Bus 700 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 706 provides an interface between bus 700 and receiver 701 and transmitter 703. Receiver 701 and transmitter 703 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 702 is responsible for managing bus 700 and general processing, while memory 704 can be used to store data used by processor 702 during operation.

[0120] Example 4

[0121] Based on the same inventive concept, embodiments of the present invention provide a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the above-described performance analysis method for turbine runner blades.

[0122] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings herein. The required structure for constructing such systems is apparent from the above description. Furthermore, this invention is not directed to any particular programming language. It should be understood that the contents of the invention described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the invention.

[0123] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0124] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0125] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0126] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0127] The various component embodiments of the present invention can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some or all of the components in the turbine runner blade performance analysis device or computer equipment according to embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and computer program product) for performing part or all of the methods described herein. Such programs implementing the present invention can be stored on a computer-readable medium or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0128] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims 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.

Claims

1. A method for performance analysis of turbine runner blades, characterized in that, include: Obtain the pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the runner blades; The pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the impeller blades are processed to obtain the processing results, including: The first pressure distribution map of the pressure surface and the second pressure distribution map of the suction surface are processed to determine whether the area of ​​the region on the pressure surface that is higher than the first preset pressure is smaller than the first preset area, whether the area of ​​the region on the suction surface that is lower than the second preset pressure is smaller than the second preset area, and whether the first preset pressure is greater than the second preset pressure, so as to obtain the first processing result. The first vorticity distribution map of the pressure surface and the second vorticity distribution map of the suction surface are processed to determine whether the area of ​​the region with positive vorticity on the pressure surface is greater than the third preset area and whether the area of ​​the region with negative vorticity on the suction surface is less than the fourth preset area. The third preset area and the fourth preset area are determined based on the vorticity distribution map of the impeller blade before optimization, and the second processing result is obtained. The distribution maps of the first equivalent static stress of the pressure surface and the second equivalent static stress of the suction surface are processed to determine whether the equivalent static stress of the pressure surface and the suction surface in the region near the wheel rim at the water outlet, the part of the region near the wheel hub at the inlet, and the middle region of the blade are all less than the threshold corresponding to their respective regions. The threshold corresponding to each region is determined based on the equivalent static stress map of the impeller blade before the improvement, and a third processing result is obtained. The first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface are processed to determine whether the degree of distortion of the pressure surface and the suction surface is lower than the distortion threshold, and a fourth processing result is obtained. Based on the processing results, the performance of the impeller blades is analyzed, and the analysis results are obtained.

2. The method as described in claim 1, characterized in that, The acquisition of the pressure distribution map, vorticity distribution map, equivalent static stress distribution map, blade deformation distribution map, and displacement distribution map of the turbine blade includes: Obtain the first pressure distribution map of the pressure surface and the second pressure distribution map of the suction surface of the impeller blade, the first vorticity distribution map of the pressure surface and the second vorticity distribution map of the suction surface, the first equivalent static stress distribution map of the pressure surface and the second equivalent static stress distribution map of the suction surface, as well as the first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface.

3. The method as described in claim 1, characterized in that, The first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface are processed to determine whether the degree of distortion of the pressure surface and the suction surface is lower than the distortion threshold, and a fourth processing result is obtained, including: The first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface are processed to obtain the area of ​​the region where the displacement is greater than the first displacement threshold and the area of ​​the region where the displacement is less than the second displacement threshold. Based on the area of ​​the region where the displacement is greater than the first displacement threshold and the area of ​​the region where the displacement is less than the second displacement threshold, it is determined whether the degree of distortion of the pressure surface and the suction surface is lower than the distortion threshold, and a fourth processing result is obtained.

4. The method as described in claim 1, characterized in that, Based on the processing results, the performance of the impeller blades is analyzed, and the analysis results include: When at least one of the first, second, third, and fourth processing results is true, the performance improvement of the impeller blade is determined.

5. The method as described in claim 4, characterized in that, The step of determining the performance improvement of the impeller blade when at least one of the first, second, third, and fourth processing results is yes includes: If any one of the first, second, third, and fourth processing results is true, it is determined that the performance of the impeller blade has been improved by one level. If two of the first, second, third, and fourth processing results are true, it is determined that the performance of the impeller blade has been improved in two stages. If three of the first, second, third, and fourth processing results are true, it is determined that the performance of the rotor blade has been improved by three levels. When four of the first, second, third, and fourth processing results are true, it is determined that the performance of the impeller blade has been improved in four stages, with the improvement effects of the first, second, third, and fourth stages increasing sequentially.

6. The method as described in claim 1, characterized in that, After analyzing the performance of the impeller blades based on the processing results and obtaining the analysis results, the method further includes: Based on the analysis results, the degree of optimization of the runner blades is determined.

7. A performance analysis device for turbine runner blades, characterized in that, include: The acquisition module is used to acquire the pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the runner blades. The processing module is used to process the pressure distribution diagram, vorticity distribution diagram, equivalent static stress distribution diagram, and displacement distribution diagram of the impeller blades respectively to obtain the processing results. The processing module is used to: The first pressure distribution map of the pressure surface and the second pressure distribution map of the suction surface are processed to determine whether the area of ​​the region on the pressure surface that is higher than the first preset pressure is smaller than the first preset area, whether the area of ​​the region on the suction surface that is lower than the second preset pressure is smaller than the second preset area, and whether the first preset pressure is greater than the second preset pressure, so as to obtain the first processing result. The first vorticity distribution map of the pressure surface and the second vorticity distribution map of the suction surface are processed to determine whether the area of ​​the region with positive vorticity on the pressure surface is greater than the third preset area and whether the area of ​​the region with negative vorticity on the suction surface is less than the fourth preset area. The third preset area and the fourth preset area are determined based on the vorticity distribution map of the impeller blade before optimization, and the second processing result is obtained. The distribution maps of the first equivalent static stress of the pressure surface and the second equivalent static stress of the suction surface are processed to determine whether the equivalent static stress of the pressure surface and the suction surface in the region near the wheel rim at the water outlet, the part of the region near the wheel hub at the inlet, and the middle region of the blade are all less than the threshold corresponding to their respective regions. The threshold corresponding to each region is determined based on the equivalent static stress map of the impeller blade before the improvement, and a third processing result is obtained. The first displacement distribution map of the pressure surface and the second displacement distribution map of the suction surface are processed to determine whether the degree of distortion of the pressure surface and the suction surface is lower than the distortion threshold, and a fourth processing result is obtained. The module is used to analyze the performance of the impeller blades based on the processing results and obtain the analysis results.

8. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the method as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the method as described in any one of claims 1 to 6.

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