A method, device and medium for testing aerodynamic noise of a server fan

Abstract

The present application discloses a method for testing the aerodynamic noise of a server fan, comprising: obtaining geometric data of a server machine including a rotating fan; establishing a numerical analysis model based on the geometric data; performing aerodynamic noise numerical analysis on the numerical analysis model, and obtaining a result of the aerodynamic noise numerical analysis. The present application establishes a numerical analysis model, performs numerical analysis and obtains a result to evaluate whether the server machine design will cause serious server fan aerodynamic noise problems, thereby eliminating the need for producing parts, and effectively avoiding the problem of combining the generated server machine with the fan and then conducting experimental tests, and the test results not meeting the requirements, requiring the parts to be redesigned, thereby effectively improving R&D efficiency, shortening the R&D cycle, and reducing R&D costs. In addition, the present application also discloses a test device and medium for the aerodynamic noise of a server fan corresponding to the above method, and the specific effects are as above.

Description

Technical Field

[0001] The present application relates to the field of computer-aided engineering technology, and in particular to a method, device and medium for testing aerodynamic noise of a server fan. Background Art

[0002] The server fan is currently the main device used by the server to discharge the heat generated by the internal components. With the improvement of server performance, the power and heat generation of internal components such as the central processing unit (CPU) and graphics processing unit (GPU) are getting higher and higher, and the ventilation volume demand of the server fan is also increasing. This has led to the continuous increase in the speed of the server fan, and the noise generated has continued to increase, and has even begun to seriously affect the working performance of the internal components of the server and the actual experience of the user. Among the various components of the noise of the server fan, the pneumatic noise part contributes the most, while the vibration noise and electromagnetic noise contribute less. Therefore, in the design of the whole server, evaluating the impact of the startup noise of the server fan has become an indispensable step in the research and development link.

[0003] At present, the aerodynamic noise problem of server fans is generally evaluated by prototyping the server as a whole machine, installing it in combination with the fan, and then conducting a noise test on the whole machine. Once the noise test results do not meet the requirements, the server has to be redesigned, assembled and tested again, which is not only time-consuming and labor-intensive, but also significantly increases the design cycle and R&D costs.

[0004] Therefore, how to efficiently and cost-effectively test the aerodynamic noise of a server fan in a complete server state is an issue that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The purpose of the present application is to provide a method, device and medium for testing the aerodynamic noise of a server fan, which are used to efficiently and cost-effectively test the aerodynamic noise of a server fan in a complete server state.

[0006] In order to solve the above technical problems, the present application provides a method for testing aerodynamic noise of a server fan, comprising:

[0007] Obtaining geometric data of the entire server including the rotating fan;

[0008] Establishing a numerical analysis model according to the geometric data;

[0009] The numerical analysis model is subjected to aerodynamic noise numerical analysis, and aerodynamic noise numerical analysis result is obtained.

[0010] Preferably, establishing a numerical analysis model according to geometric data comprises:

[0011] Simplifying the geometric data according to a simplification rule to obtain simplified geometric data;

[0012] A finite volume method numerical analysis model of the flow field in the fan rotation area is established according to the simplified geometric data, and an internal ventilation environment of the server is simulated in the finite volume method numerical analysis model;

[0013] Establishing a finite element method numerical analysis model of the acoustic field of the server according to the simplified geometric data;

[0014] The interactive boundary surfaces of the finite volume method numerical analysis model and the finite element method numerical analysis model overlap in space.

[0015] Preferably, simulating the internal ventilation environment of the server in the finite volume method numerical analysis model includes:

[0016] An airflow inlet and outlet channel is added to the finite volume method numerical analysis model, and geometric obstacles are set in the airflow inlet and outlet channel to simulate the internal ventilation environment of the server.

[0017] Preferably, performing aerodynamic noise numerical analysis on the numerical analysis model and obtaining aerodynamic noise numerical analysis results includes:

[0018] Performing transient flow field numerical analysis on the finite volume method numerical analysis model, and outputting sound pressure data of the interactive boundary surface of the finite volume method numerical analysis model;

[0019] Mapping the sound pressure data onto the interaction boundary surface of the finite element method numerical analysis model;

[0020] Finite element acoustic numerical analysis is performed on the finite element method numerical analysis model, and the finite element acoustic numerical analysis result is obtained as the aerodynamic noise numerical analysis result.

[0021] Preferably, the performing transient flow field numerical analysis on the finite volume method numerical analysis model and outputting the sound pressure data of the interactive boundary surface of the finite volume method numerical analysis model includes:

[0022] Set flow field analysis parameters;

[0023] Performing the transient flow field numerical analysis on the finite volume method numerical analysis model according to the flow field analysis parameters;

[0024] After the flow field state is stabilized, the sound pressure data of the interactive boundary surface of the finite volume method numerical analysis model is output.

[0025] Preferably, the performing finite element acoustic numerical analysis on the finite element method numerical analysis model comprises:

[0026] Setting other parameters of the acoustic field of the server; wherein the other parameters include material acoustic property parameters, analysis frequency range, and acoustic boundary conditions;

[0027] The finite element acoustic numerical analysis is performed on the finite element method numerical analysis model in combination with the remaining parameters and the sound pressure data.

[0028] Preferably, mapping the sound pressure data to the interactive interface of the finite element method numerical analysis model comprises:

[0029] The sound pressure data on the interactive boundary surface of the finite volume method numerical analysis model is distributed to the corresponding interactive variable interface of the finite element method numerical analysis model through interpolation calculation.

[0030] The present application also provides a server fan aerodynamic noise testing device, comprising:

[0031] An acquisition module, used to acquire geometric data of the entire server including the rotating fan;

[0032] An establishment module, used for establishing a numerical analysis model according to the geometric data;

[0033] The analysis module is used to perform aerodynamic noise numerical analysis on the numerical analysis model and obtain aerodynamic noise numerical analysis.

[0034] The present application also provides a server fan aerodynamic noise testing device, comprising a memory for storing a computer program; and a processor for implementing the steps of the server fan aerodynamic noise testing method when executing the computer program.

[0035] The present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for testing the aerodynamic noise of a server fan are implemented.

[0036] The present application provides a method for testing the aerodynamic noise of a server fan, comprising: obtaining geometric data of a server machine including a rotating fan; establishing a numerical analysis model based on the geometric data; performing aerodynamic noise numerical analysis on the numerical analysis model, and obtaining a result of the aerodynamic noise numerical analysis. The present application establishes a numerical analysis model, performs numerical analysis, and obtains a result to evaluate whether the server machine design will cause serious server fan aerodynamic noise problems, thereby eliminating the need for producing parts, and effectively avoiding the problem of combining the generated server machine with the fan and then conducting experimental tests, and the test results not meeting the requirements, requiring the parts to be redesigned, thereby effectively improving R&D efficiency, shortening the R&D cycle, and reducing R&D costs.

[0037] In addition, a server fan aerodynamic noise testing device and medium provided in the present application correspond to the above method, and the specific effects are as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A flow chart of a method for testing aerodynamic noise of a server fan provided in an embodiment of the present application;

[0040] Figure 2 A structural diagram of a server fan aerodynamic noise testing device provided in an embodiment of the present application;

[0041] Figure 3 A structural diagram of another server fan aerodynamic noise testing device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] The core of this application is to provide a method, device and medium for testing the aerodynamic noise of a server fan.

[0044] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] Figure 1 A flow chart of a method for testing aerodynamic noise of a server fan provided in an embodiment of the present application. Figure 1 As shown in the figure, the test method for server fan aerodynamic noise includes:

[0046] S10: Acquire geometric data of the entire server including the rotating fan.

[0047] S11: Establish a numerical analysis model based on geometric data.

[0048] S12: performing aerodynamic noise numerical analysis on the numerical analysis model and obtaining aerodynamic noise numerical analysis result.

[0049] It should be noted that the above method can be applied to numerical analysis modeling software, which can be Ansys SpaceClaim, a new generation of 3D high-efficiency modeling software, which has been widely used in the field of international industrial numerical analysis, and can significantly shorten the product design cycle and greatly improve the model processing quality and efficiency of Computer Aided Engineering (CAE) analysis. Of course, the above method can also be applied to other software, and the embodiments of this application are not specifically limited.

[0050] In step S10, the rotary fan is generally composed of a fan frame, fan blades, a rotating shaft, a motor and a control circuit. It is a power device that converts electrical energy into mechanical energy and then into gas by using the principle that an energized coil rotates under force in a magnetic field. At present, most servers use rotary fans to discharge the heat energy emitted by various internal electronic devices. The geometric data is a three-dimensional model in a certain proportion or consistent with the actual size, and can be drawn using any kind of mapping software, such as Creo Parametric, etc., which are not listed here one by one. The geometric model of the entire server includes the geometric models of all components required for the normal operation of the server, such as server structural parts, hard disks, rotary fans, CPU radiators, air guide covers, various boards, power supplies, etc.

[0051] In step S11, a numerical analysis model is established based on the geometric data. The geometric data may be geometric data containing all the detailed features of the entire server, or simplified geometric data, which is not specifically limited in the embodiments of the present application. In addition, the number of numerical analysis models is not specifically limited in the embodiments of the present application. In practical applications, the establishment of the numerical analysis model can be carried out using Ansys Meshing, where the target area is meshed to generate mesh units, that is, the model of the geometric data is divided into many small mesh units, and the quality of the generated mesh will determine the quality of the subsequent analysis results. Specifically, meshing can include three-dimensional body unit meshing that occupies the spatial position of the component, wherein the shell unit is preferably a regular quadrilateral, and the body unit is preferably a regular hexahedron.

[0052] In step S12, the numerical analysis of aerodynamic noise on the numerical analysis model may include transient flow field numerical analysis and finite element acoustic numerical analysis, etc. The obtained numerical analysis results of aerodynamic noise are compared with the relevant design requirements of the server whole machine noise, so as to predict whether the design scheme of the server whole machine meets the requirements.

[0053] The present application provides a method for testing the aerodynamic noise of a server fan, comprising: obtaining geometric data of a server machine including a rotating fan; establishing a numerical analysis model based on the geometric data; performing aerodynamic noise numerical analysis on the numerical analysis model, and obtaining a result of the aerodynamic noise numerical analysis. The present application establishes a numerical analysis model, performs numerical analysis, and obtains a result to evaluate whether the server machine design will cause serious server fan aerodynamic noise problems, thereby eliminating the need for producing parts, and effectively avoiding the problem of combining the generated server machine with the fan and then conducting experimental tests, and the test results not meeting the requirements, requiring the parts to be redesigned, thereby effectively improving R&D efficiency, shortening the R&D cycle, and reducing R&D costs.

[0054] During the research and development process, designers will generate or import geometric data containing all the detailed features of the server according to development requirements, and then hand it over to analysis engineers for performance evaluation and analysis, so the overall calculation process is relatively complicated. Based on the above embodiments, in order to simplify the subsequent calculation process, the embodiment of the present application simplifies the geometric data according to the simplification rules and obtains simplified geometric data; a finite volume method numerical analysis model of the flow field in the fan rotation area is established based on the simplified geometric data, and the internal ventilation environment of the server is simulated in the finite volume method numerical analysis model; a finite element method numerical analysis model of the sound field of the server is established based on the simplified geometric data; the interaction boundary surface of the finite volume method numerical analysis model and the finite element method numerical analysis model overlap in space.

[0055] In the embodiment of the present application, the geometric data can be simplified according to the pre-stored simplification rules, and the simplification rules are to simplify or discard the detail features and components that have little impact on the analysis results, but retain the important features and components that have a significant impact on the analysis results. After obtaining the preliminary simplified geometric data, the simplified geometric data can also be appropriately modified to facilitate the generation of grid cells.

[0056] It should be noted that the flow field in the fan rotation area is coaxial with the fan rotating blades and can just cover the cylindrical area of ​​the fan rotating blades; the sound field of the server as a whole is an area that includes the appropriate space inside and outside the server, but excludes the flow field in the fan rotation area. The numerical analysis model is a finite volume method numerical analysis model of the flow field in the fan rotation area and a finite element method numerical analysis model of the sound field of the server as a whole, wherein the internal ventilation environment of the server as a whole is simulated in the finite volume method numerical analysis model. The spatial overlap of the interactive boundary surface means that the interactive boundary surface of the flow field and the sound field is a cylindrical surface occupying the same spatial position, but the grids of each numerical analysis model are independent. In the mesh division of the flow field and the sound field, most of them are three-dimensional units. The final mesh unit needs to appropriately express the spatial occupancy of the original model, and the quality of the mesh unit must meet certain inspection conditions.

[0057] In the embodiment of the present application, the geometric data is simplified, and the finite volume method numerical analysis model of the flow field and the finite element method numerical analysis model of the acoustic field are established based on the simplified geometric data. While reducing the complexity of the numerical analysis, the accuracy of the data analysis results can also be guaranteed, and the test efficiency of the aerodynamic noise of the server can be improved.

[0058] Based on the above embodiment, simulating the internal ventilation environment of the server machine in the finite volume method numerical analysis model includes: adding air flow inlet and outlet channels to the finite volume method numerical analysis model, and setting geometric obstacles in the air flow inlet and outlet channels to simulate the internal ventilation environment of the server machine.

[0059] It should be noted that the airflow inlet and outlet channel refers to a numerical analysis model that can express the airflow inlet and outlet state when the rotary fan is working normally inside the server. For each rotary fan at a specific speed, different ventilation volumes will bring different inlet and outlet pressure differences, as well as aerodynamic noise of different decibels. Therefore, in order to more accurately predict and evaluate the aerodynamic noise level of the fan in the server, the established airflow inlet and outlet channel should be able to provide a ventilation volume consistent with the rotary fan inside the server. In practical applications, Ansys SpaceClaim and Ansys Meshing can be used to simulate the internal ventilation environment of the server by setting geometric obstacles in the airflow inlet and outlet channels.

[0060] The embodiment of the present application improves the accuracy of the prediction of the aerodynamic noise of the server by simulating the internal ventilation environment of the server in a finite volume method numerical analysis model.

[0061] Based on the above embodiment, aerodynamic noise numerical analysis is performed on the numerical analysis model, and the aerodynamic noise numerical analysis results are obtained, including: performing transient flow field numerical analysis on the finite volume method numerical analysis model, and outputting sound pressure data of the interactive boundary surface of the finite volume method numerical analysis model; mapping the sound pressure data to the interactive boundary surface of the finite element method numerical analysis model; performing finite element acoustic numerical analysis on the finite element method numerical analysis model, and obtaining finite element acoustic numerical analysis results as the aerodynamic noise numerical analysis results.

[0062] The embodiment of the present application performs transient flow field numerical analysis on the finite volume numerical analysis model, maps the output sound pressure data to the corresponding finite element method numerical analysis model, performs finite element acoustic numerical analysis on the finite element method numerical analysis model, and extracts the finite element acoustic numerical analysis results, which include calculating the sound pressure distribution on the target surface, calculating the sound pressure level at the target point, calculating the sound power in the target space, etc., which are not listed here one by one. In practical applications, ANSYS HarmonicAcoustics can be used to extract the sound field numerical analysis results, select Sound PressureLevel for calculating the sound pressure distribution on the target surface, select Far-field SPL Mic for the sound pressure level at the target point, and select Far-field SoundPower Level for the sound power in the target space. The above analysis results are used as the numerical analysis results of the aerodynamic noise of the entire server.

[0063] In order to facilitate understanding of the implementation of this application, each link will be described in detail below.

[0064] The method of performing transient flow field numerical analysis on the finite volume numerical analysis model and outputting the sound pressure data of the interactive boundary surface of the finite volume numerical analysis model specifically includes: setting flow field analysis parameters; performing transient flow field numerical analysis on the finite volume numerical analysis model according to the flow field analysis parameters; and outputting the sound pressure data of the interactive boundary surface of the finite volume numerical analysis model after the flow field state is stable.

[0065] It should be noted that the flow field analysis parameters include the flow field mathematical discrete constitutive equation, the flow field near-wall processing method, the fluid high-precision material parameters, the flow field dynamic grid processing parameters, the flow field boundary conditions, the flow field pressure-velocity coupling parameters, the flow field domain initialization method, the solution time step parameters, the observation point information parameters, etc., which are not listed here one by one. The mathematical discrete constitutive equation of the flow field is a mathematical equation that uses a discrete method to approximate the macroscopic properties of the flow field; the near-wall processing method of the flow field is a method for processing the large gradient of the normal velocity near the wall of the flow field; the high-precision material parameters of the fluid are a set of nonlinear performance parameters that accurately express the fluid material and are independent of size or constraints; the dynamic grid processing parameters of the flow field refer to the processing method parameters when the grid unit changes position as the fan blade rotates; the flow field boundary conditions refer to the parameters of the change law of specific variables or their derivatives on the boundary of the flow field solution area; the flow field pressure-velocity coupling parameters refer to the coupling solution parameters of pressure and velocity when solving the flow field; the flow field domain initialization method is a method of assigning initial physical quantities to the entire flow field domain before the flow field solution begins; the solution time step parameter refers to the length of time added to the next step after each step of the solver converges when solving the transient flow field; the observation point information parameter is a parameter that sets the output method of additional information at a specific position in the flow field domain. In practical applications, ANSYS Fluent can be used to set relevant flow field parameters and perform transient flow field numerical analysis. Select SST k-omega for the flow field mathematical discrete constitutive equation; select SBES-WALE for the flow field near-wall processing method; select density: ideal gas, viscosity: sutherland for the fluid high-precision material parameters; select mesh motion for the flow field dynamic mesh processing parameters and set the fan operating speed; select inlet: mass flow, outlet: pressure, wall: no slip for the flow field boundary conditions; select simplec for the flow field pressure-velocity coupling parameter; select standard for the flow field domain initialization method; select fixed: 1e-4s for the solution time step parameter; and select vertex average: static pressure for the observation point information parameter.

[0066] The stability of the flow field state means that the static pressure at the observation point of the flow field domain presents stable periodic fluctuations; the sound pressure data refers to the frequency domain sound pressure data obtained by Fourier transforming the time domain sound pressure data on the interaction boundary surface within the appropriate time length. In practical applications, ANSYS Fluent can be used to output the sound pressure data. After the flow field state is stable, select the flow field interaction boundary surface as Sources in Acoustics Model: FfowcsWilliam&Hawkings, and Export Acoustics SourceData in ASD Format as Export Option, and then continue to run the fan for two revolutions at a time step of 1e-6s. Then, in the Acoustics Sources FFT window, first Read*.asd Files, then Compute FFTFields, and finally Write CGNS Files.

[0067] Mapping the sound pressure data to the interactive interface of the finite element method numerical analysis model specifically includes: allocating the sound pressure data on the interactive boundary surface of the finite volume method numerical analysis model to the corresponding interactive interface of the finite element method numerical analysis model through interpolation calculation.

[0068] Sound pressure data mapping refers to the use of interpolation calculation to distribute the sound pressure data from the mesh of the flow field to the mesh of the acoustic field based on the mesh node positions of the finite volume method numerical analysis model of the interface flow field and the finite element method numerical analysis model of the acoustic field. In practical applications, ANSYS Harmonic Acoustics can be used for sound pressure data mapping, adding boundary conditions Structural: Imported CFD Pressure, selecting the interactive boundary surface of the server's entire acoustic field and the output frequency domain sound pressure data *.cgns file.

[0069] The finite element acoustic numerical analysis of the finite element method numerical analysis model specifically includes: setting the remaining parameters of the sound field of the server; wherein the remaining parameters include material acoustic property parameters, analysis frequency range, and acoustic boundary conditions; and combining the remaining parameters with sound pressure data to perform finite element acoustic numerical analysis on the finite element method numerical analysis model.

[0070] The remaining parameters include material acoustic property parameters, analysis frequency intervals, acoustic boundary conditions, etc., which are not listed here one by one and are not specifically limited in the embodiments of this application. Material acoustic property parameters are a set of acoustic performance parameters that accurately express the gas or noise reduction material and are independent of size or constraints; the analysis frequency interval is the sensitive frequency range of concern in actual engineering applications; the acoustic boundary conditions refer to the parameters of the law of change of specific variables or their derivatives on the boundary of the sound field solution area. In practical applications, ANSYS Harmonic Acoustics can be used to set relevant sound field domain parameters and perform finite element acoustic numerical analysis. The Johnson-Champoux-Allard model is selected for material acoustic property parameters; the analysis frequency interval is set to the sensitive frequency range in the project application; the acoustic boundary conditions select RadiationBoundary and Rigid Wall on the non-interactive boundary surface.

[0071] The embodiment of the present application performs transient flow field numerical analysis on the finite volume method numerical analysis model, outputs sound pressure data, maps it to the finite element method numerical analysis model, and then performs finite element acoustic numerical analysis on the finite element method numerical analysis model to obtain the numerical analysis results of aerodynamic noise. The method of performing numerical analysis separately on the flow field of the fan rotation area and the sound field of the server as a whole is faster, more convenient, and saves time while retaining reasonable accuracy, compared to directly performing numerical analysis on the flow field of the server as a whole. It can also introduce vibration reduction and noise reduction measures in the numerical analysis link of the sound field of the server as a whole.

[0072] In the above embodiments, the test method for the pneumatic noise of the server fan is described in detail, and the present application also provides an embodiment corresponding to the test device for the pneumatic noise of the server fan. It should be noted that the present application describes the embodiments of the device part from two perspectives, one is based on the perspective of the functional module, and the other is based on the perspective of the hardware.

[0073] On this basis, the present application also discloses a server fan aerodynamic noise testing device corresponding to the above method. Figure 2 A structural diagram of a server fan aerodynamic noise testing device provided in an embodiment of the present application, such as Figure 2 As shown, the test device includes:

[0074] An acquisition module 10 is used to acquire geometric data of a server including a rotating fan;

[0075] Establishing module 11, used for establishing a numerical analysis model according to geometric data;

[0076] The analysis module 12 is used to perform aerodynamic noise numerical analysis on the numerical analysis model and obtain aerodynamic noise numerical analysis.

[0077] Since the embodiments of the apparatus part correspond to the embodiments of the method part, please refer to the description of the embodiments of the method part for the embodiments of the apparatus part, which will not be repeated here.

[0078] The present application provides a test device for the aerodynamic noise of a server fan, which is used to obtain geometric data of a server machine including a rotating fan; establish a numerical analysis model based on the geometric data; perform aerodynamic noise numerical analysis on the numerical analysis model, and obtain a numerical analysis result of the aerodynamic noise. By establishing a numerical analysis model, performing numerical analysis and obtaining results to evaluate whether the server machine design will cause serious server fan aerodynamic noise problems, the production of parts is eliminated, and the problem of combining the generated server machine with the fan and then conducting experimental tests is effectively avoided, and the test results do not meet the requirements and the parts need to be redesigned is effectively improved. R&D efficiency is effectively improved, the R&D cycle is shortened, and R&D costs are reduced.

[0079] Figure 3 A structural diagram of another server fan aerodynamic noise testing device provided in an embodiment of the present application, such as Figure 3 As shown, the server fan aerodynamic noise testing device includes: a memory 20 for storing a computer program; a processor 21 for implementing the steps of the server fan aerodynamic noise testing method of the above embodiment when executing the computer program.

[0080] The server fan aerodynamic noise testing device provided in this embodiment may include but is not limited to a tablet computer, a laptop computer, or a desktop computer.

[0081] Among them, the processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 can be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 21 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 21 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 21 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0082] The memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used to store the following computer program 201, wherein, after the computer program is loaded and executed by the processor 21, it can implement the relevant steps of the server fan aerodynamic noise test method disclosed in any of the aforementioned embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, etc., and the storage method may be temporary storage or permanent storage. Among them, the operating system 202 may include Windows, Unix, Linux, etc. The data 203 may include but is not limited to geometric data, aerodynamic noise numerical analysis results, etc.

[0083] In some embodiments, the testing device may further include a display screen 22 , an input / output interface 23 , a communication interface 24 , a power supply 25 , and a communication bus 26 .

[0084] Those skilled in the art will understand that Figure 3 The structure shown in the figure does not constitute a limitation on the test device for the aerodynamic noise of a server fan, and may include more or less components than those shown in the figure.

[0085] The server fan aerodynamic noise testing device provided in the embodiment of the present application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the following method: obtain geometric data of the server machine including a rotating fan; establish a numerical analysis model based on the geometric data; perform aerodynamic noise numerical analysis on the numerical analysis model, and obtain the aerodynamic noise numerical analysis result.

[0086] Finally, the present application also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps recorded in the above method embodiment are implemented.

[0087] It is understandable that if the method in the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0088] The above is a detailed introduction to the test method for the aerodynamic noise of the server fan provided by the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referenced to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0089] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A method for testing aerodynamic noise of a server fan, characterized in that: include: Obtaining geometric data of the entire server including the rotating fan; Establishing a numerical analysis model according to the geometric data; Performing aerodynamic noise numerical analysis on the numerical analysis model and obtaining aerodynamic noise numerical analysis result; The step of establishing a numerical analysis model according to the geometric data comprises: Simplifying the geometric data according to a simplification rule to obtain simplified geometric data; A finite volume method numerical analysis model of the flow field in the fan rotation area is established according to the simplified geometric data, and an internal ventilation environment of the server is simulated in the finite volume method numerical analysis model; Establishing a finite element method numerical analysis model of the acoustic field of the server according to the simplified geometric data; The interactive boundary surfaces of the finite volume method numerical analysis model and the finite element method numerical analysis model overlap in space; The performing of aerodynamic noise numerical analysis on the numerical analysis model and obtaining aerodynamic noise numerical analysis results includes: Performing transient flow field numerical analysis on the finite volume method numerical analysis model, and outputting sound pressure data of the interactive boundary surface of the finite volume method numerical analysis model; Mapping the sound pressure data onto the interaction boundary surface of the finite element method numerical analysis model; Finite element acoustic numerical analysis is performed on the finite element method numerical analysis model, and the finite element acoustic numerical analysis result is obtained as the aerodynamic noise numerical analysis result.

2. The method for testing the aerodynamic noise of a server fan according to claim 1, characterized in that: Simulating the internal ventilation environment of the server in the finite volume method numerical analysis model includes: An airflow inlet and outlet channel is added to the finite volume method numerical analysis model, and geometric obstacles are set in the airflow inlet and outlet channel to simulate the internal ventilation environment of the server.

3. The method for testing the aerodynamic noise of a server fan according to claim 1, characterized in that: The method of performing transient flow field numerical analysis on the finite volume method numerical analysis model and outputting sound pressure data of the interactive boundary surface of the finite volume method numerical analysis model includes: Set flow field analysis parameters; Performing the transient flow field numerical analysis on the finite volume method numerical analysis model according to the flow field analysis parameters; After the flow field state is stabilized, the sound pressure data of the interactive boundary surface of the finite volume method numerical analysis model is output.

4. The method for testing the aerodynamic noise of a server fan according to claim 1, characterized in that: The performing finite element acoustic numerical analysis on the finite element method numerical analysis model comprises: Setting other parameters of the acoustic field of the server; wherein the other parameters include material acoustic property parameters, analysis frequency range, and acoustic boundary conditions; The finite element acoustic numerical analysis is performed on the finite element method numerical analysis model in combination with the remaining parameters and the sound pressure data.

5. The method for testing the aerodynamic noise of a server fan according to claim 1, characterized in that: Mapping the sound pressure data onto the interactive boundary surface of the finite element method numerical analysis model includes: The sound pressure data on the interactive boundary surface of the finite volume method numerical analysis model is distributed to the corresponding interactive boundary surface of the finite element method numerical analysis model through interpolation calculation.

6. A testing device for aerodynamic noise of a server fan, characterized in that: include: An acquisition module, used to acquire geometric data of the entire server including the rotating fan; An establishment module, used for establishing a numerical analysis model according to the geometric data; An analysis module, used for performing aerodynamic noise numerical analysis on the numerical analysis model and obtaining aerodynamic noise numerical analysis result; The step of establishing a numerical analysis model according to the geometric data comprises: Simplifying the geometric data according to a simplification rule to obtain simplified geometric data; A finite volume method numerical analysis model of the flow field in the fan rotation area is established according to the simplified geometric data, and an internal ventilation environment of the server is simulated in the finite volume method numerical analysis model; Establishing a finite element method numerical analysis model of the acoustic field of the server according to the simplified geometric data; The interactive boundary surfaces of the finite volume method numerical analysis model and the finite element method numerical analysis model overlap in space; The performing of aerodynamic noise numerical analysis on the numerical analysis model and obtaining aerodynamic noise numerical analysis results includes: Performing transient flow field numerical analysis on the finite volume method numerical analysis model, and outputting sound pressure data of the interactive boundary surface of the finite volume method numerical analysis model; Mapping the sound pressure data onto the interaction boundary surface of the finite element method numerical analysis model; Finite element acoustic numerical analysis is performed on the finite element method numerical analysis model, and the finite element acoustic numerical analysis result is obtained as the aerodynamic noise numerical analysis result.

7. A testing device for aerodynamic noise of a server fan, characterized in that: It comprises a memory for storing a computer program; and a processor for implementing the steps of the method for testing aerodynamic noise of a server fan as claimed in any one of claims 1 to 5 when executing the computer program.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for testing aerodynamic noise of a server fan according to any one of claims 1 to 5 are implemented.

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