Method, device and equipment for obtaining numerical value of calibration coefficient of three-dimensional pitot tube and medium

Abstract

The invention discloses a method and device for obtaining a numerical value of a three-dimensional pitot tube calibration coefficient, electronic equipment and a storage medium. The method comprises the following steps: respectively establishing a geometric model of a to-be-calibrated three-dimensional pitot tube and a geometric model of a wind tunnel; combining the geometric model of the to-be-calibrated three-dimensional pitot tube with the geometric model of the wind tunnel to obtain a combined model of the to-be-calibrated three-dimensional pitot tube and the wind tunnel; meshing and boundary condition setting are conducted on the combined model, and after meshing and boundary condition setting are conducted, the static pressure value and the dynamic pressure value of fluid are obtained in the combined model; wherein the static pressure values comprise a first static pressure value, a second static pressure value, a third static pressure value, a fourth static pressure value and a fifth static pressure value; and calculating a calibration coefficient of the to-be-calibrated three-dimensional pitot tube according to the static pressure value and the dynamic pressure value. According to the embodiment of the invention, the calibration coefficient of the three-dimensional pitot tube can be obtained, so that the accuracy and reliability of the measurement result of the three-dimensional pitot tube can be ensured.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of measurement and testing technology, and in particular to a numerical method, device, equipment and medium for obtaining a three-dimensional pitot tube calibration coefficient. Background Art

[0002] A 3D Pitot Tube is an instrument used to measure fluid velocity and is used to determine the velocity vector of a fluid in three-dimensional space. Traditional Pitot tubes are mainly used to measure the total pressure and static pressure of a fluid, thereby calculating the direction and magnitude of the flow velocity. However, in complex flow environments, such as wind tunnel testing, airflow measurements around aircraft, or turbulence research, using only a Pitot tube in one direction may not be enough to provide complete information.

[0003] A 3D pitot tube usually consists of three mutually perpendicular pitot tubes, each pointing to a different axis (X, Y, Z). In this way, by measuring the total pressure and static pressure in three directions, the velocity components of the fluid in three dimensions can be obtained simultaneously. The design and calibration of a 3D pitot tube is more complicated than a 2D or 1D pitot tube because it is necessary to ensure that the three pipes can be accurately measured in all directions without interfering with each other. In practical applications, 3D pitot tubes are often used in conjunction with data acquisition systems to record and analyze fluid dynamics data in real time.

[0004] In the process of implementing this application, the applicant found that there are at least the following problems in the prior art:

[0005] In the prior art, it is impossible to obtain the calibration coefficient of the three-dimensional Pitot tube, and thus it is impossible to ensure the accuracy and reliability of the measurement results of the three-dimensional Pitot tube. Summary of the invention

[0006] The present application provides a numerical method, device, electronic device and storage medium for obtaining the calibration coefficient of a three-dimensional pitot tube, which can obtain the calibration coefficient of the three-dimensional pitot tube, thereby ensuring the accuracy and reliability of the measurement results of the three-dimensional pitot tube.

[0007] In a first aspect, an embodiment of the present application provides a numerical method for obtaining a three-dimensional pitot tube calibration coefficient, the method comprising:

[0008] Establishing the geometric model of the three-dimensional pitot tube to be calibrated and the geometric model of the wind tunnel respectively;

[0009] Combining the geometric model of the three-dimensional Pitot tube to be calibrated with the geometric model of the wind tunnel to obtain a combined model of the three-dimensional Pitot tube to be calibrated and the wind tunnel;

[0010] The combined model is meshed and boundary conditions are set. After meshing and boundary conditions are set, static pressure values ​​and dynamic pressure values ​​of the fluid are respectively obtained in the combined model; wherein the static pressure values ​​include: a first static pressure value, a second static pressure value, a third static pressure value, a fourth static pressure value, and a fifth static pressure value;

[0011] The calibration coefficient of the three-dimensional Pitot tube to be calibrated is calculated according to the static pressure value and the dynamic pressure value.

[0012] In a second aspect, the embodiment of the present application further provides a numerical device for obtaining a three-dimensional pitot tube calibration coefficient, the device comprising: an establishment module, a combination module, an acquisition module and a calculation module; wherein,

[0013] The establishment module is used to respectively establish a geometric model of a three-dimensional pitot tube to be calibrated and a geometric model of a wind tunnel;

[0014] The combining module is used to combine the geometric model of the three-dimensional pitot tube to be calibrated with the geometric model of the wind tunnel to obtain a combined model of the three-dimensional pitot tube to be calibrated and the wind tunnel;

[0015] The acquisition module is used to perform grid division and boundary condition setting on the combined model, and after the grid division and boundary condition setting, respectively obtain the static pressure value and dynamic pressure value of the fluid in the combined model; wherein the static pressure value includes: a first static pressure value, a second static pressure value, a third static pressure value, a fourth static pressure value and a fifth static pressure value;

[0016] The calculation module is used to calculate the calibration coefficient of the three-dimensional Pitot tube to be calibrated according to the static pressure value and the dynamic pressure value.

[0017] In a third aspect, an embodiment of the present application provides an electronic device, including:

[0018] one or more processors;

[0019] a memory for storing one or more programs,

[0020] When the one or more programs are executed by the one or more processors, the one or more processors implement the numerical method for obtaining the three-dimensional Pitot tube calibration coefficient described in any embodiment of the present application.

[0021] In a fourth aspect, an embodiment of the present application provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the numerical method for obtaining the three-dimensional Pitot tube calibration coefficient as described in any embodiment of the present application.

[0022] The embodiment of the present application proposes a numerical method, device, electronic device and storage medium for obtaining the calibration coefficient of a three-dimensional pitot tube. First, the geometric model of the three-dimensional pitot tube to be calibrated and the geometric model of the wind tunnel are respectively established, and then the geometric model of the three-dimensional pitot tube to be calibrated and the geometric model of the wind tunnel are combined to obtain a combined model of the three-dimensional pitot tube and the wind tunnel to be calibrated; then the combined model is gridded and boundary conditions are set, and after gridding and boundary conditions are set, the static pressure value and dynamic pressure value of the fluid are respectively obtained in the combined model; wherein the static pressure value includes: a first static pressure value, a second static pressure value, a third static pressure value, a fourth static pressure value and a fifth static pressure value; finally, the calibration coefficient of the three-dimensional pitot tube to be calibrated is calculated according to the static pressure value and the dynamic pressure value. That is to say, in the technical solution of the present application, the calibration coefficient of the three-dimensional pitot tube to be calibrated can be calculated according to the first static pressure value, the second static pressure value, the third static pressure value, the fourth static pressure value and the fifth static pressure value and the dynamic pressure value. In the prior art, the calibration coefficient of the three-dimensional pitot tube cannot be obtained, and thus the accuracy and reliability of the measurement result of the three-dimensional pitot tube cannot be ensured. Therefore, compared with the prior art, the numerical method, device, electronic device and storage medium for obtaining the calibration coefficient of the three-dimensional Pitot tube proposed in the embodiment of the present application can obtain the calibration coefficient of the three-dimensional Pitot tube, thereby ensuring the accuracy and reliability of the measurement results of the three-dimensional Pitot tube; and the technical solution of the embodiment of the present application is simple and convenient to implement, easy to popularize, and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a flow chart of a numerical method for obtaining a three-dimensional pitot tube calibration coefficient provided in an embodiment of the present application;

[0024] FIG2( a ) is a front view of a geometric model of a spherical three-dimensional pitot tube provided in one embodiment of the present application;

[0025] FIG2( b ) is a side view of a geometric model of a spherical three-dimensional pitot tube provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of a wind-driven geometric model provided in one embodiment of the present application;

[0027] Figure 4 A schematic diagram of a flow chart of a numerical method for obtaining a three-dimensional pitot tube calibration coefficient provided in another embodiment of the present application;

[0028] Figure 5 A schematic diagram of a flow chart of a numerical method for obtaining a three-dimensional pitot tube calibration coefficient provided in yet another embodiment of the present application;

[0029] Figure 6 A curve diagram of pitch angle calibration coefficients under different pitch angle conditions provided by an embodiment of the present application;

[0030] Figure 7 A curve diagram of dynamic pressure calibration coefficient under different pitch angle conditions provided by an embodiment of the present application;

[0031] Figure 8 A schematic diagram of the structure of a numerical device for obtaining a three-dimensional pitot tube calibration coefficient provided in an embodiment of the present application;

[0032] Fig. 9 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0033] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only the parts related to the present application, rather than all structures, are shown in the accompanying drawings.

[0034] Figure 1 This is a flow chart of a method for obtaining a numerical value of a three-dimensional pitot tube calibration coefficient provided in an embodiment of the present application. The method can be performed by a numerical device or electronic device for obtaining a numerical value of a three-dimensional pitot tube calibration coefficient. The device or electronic device can be implemented in software and / or hardware, and the device or electronic device can be integrated in any intelligent device with network communication function. Figure 1 As shown, the numerical method for obtaining the three-dimensional pitot tube calibration coefficient may include the following steps:

[0035] S101 , respectively establishing a geometric model of a three-dimensional pitot tube to be calibrated and a geometric model of a wind tunnel.

[0036] FIG2(a) is a front view of a geometric model of a spherical three-dimensional pitot tube provided in one embodiment of the present application. FIG2(b) is a side view of a geometric model of a spherical three-dimensional pitot tube provided in one embodiment of the present application. Figure 2(a) and 2(b) As shown, based on the three-dimensional Pitot tube to be calibrated, its three-dimensional geometric model can be constructed; wherein P1, P2, P3, P4 and P5 represent the first static pressure value, the second static pressure value, the third static pressure value, the fourth static pressure value and the fifth static pressure value respectively.

[0037] S102, combining the geometric model of the three-dimensional pitot tube to be calibrated with the geometric model of the wind tunnel to obtain a combined model of the three-dimensional pitot tube to be calibrated and the wind tunnel.

[0038] Figure 3 Schematic diagram of a wind-driven geometric model provided by an embodiment of the present application. Figure 3As shown in the figure, with reference to the geometric parameters of the actual physical scene of the three-dimensional pitot tube application, a low-speed wind tunnel geometric model or simplified model used to calibrate the three-dimensional pitot tube is constructed. The wind tunnel model can be simplified on the principle that the flow field directly in front of the total pressure hole of the pitot tube can reach a fully developed state in the simplified wind tunnel. The above-mentioned actual physical scene can be a flue; the geometric parameters mainly refer to the equivalent hydraulic diameter.

[0039] S103, meshing the combined model and setting boundary conditions. After meshing and setting boundary conditions, respectively obtain static pressure values ​​and dynamic pressure values ​​of the fluid in the combined model; wherein the static pressure values ​​include: a first static pressure value, a second static pressure value, a third static pressure value, a fourth static pressure value, and a fifth static pressure value.

[0040] The collection points of the first static pressure value, the second static pressure value, the third static pressure value, the fourth static pressure value, and the fifth static pressure value in the embodiment of the present application can be evenly distributed on the cross section of the geometric model of the three-dimensional pitot tube. In one embodiment, the collection point of the first static pressure value can be located at the center point of the cross section of the geometric model of the three-dimensional pitot tube; the collection points of the second static pressure value, the third static pressure value, the fourth static pressure value, and the fifth static pressure value can be located in the four directions of the top, bottom, left, and right of the cross section of the geometric model of the three-dimensional pitot tube.

[0041] S104, calculating the calibration coefficient of the three-dimensional Pitot tube to be calibrated according to the static pressure value and the dynamic pressure value.

[0042] In this step, the first static pressure value, the second static pressure value, the fourth static pressure value, and the fifth static pressure value may be input into a pre-constructed calculation model of the pitch angle calibration coefficient, and the pitch angle calibration coefficient of the three-dimensional pitot tube to be calibrated may be calculated by the calculation model of the pitch angle calibration coefficient. In addition, the first static pressure value, the second static pressure value, and the dynamic pressure value may be input into a pre-constructed calculation model of the dynamic pressure calibration coefficient, and the dynamic pressure calibration coefficient of the three-dimensional pitot tube to be calibrated may be calculated by the calculation model of the dynamic pressure calibration coefficient.

[0043] The numerical method for obtaining the calibration coefficient of the three-dimensional pitot tube proposed in the embodiment of the present application is to first establish the geometric model of the three-dimensional pitot tube to be calibrated and the geometric model of the wind tunnel respectively; then combine the geometric model of the three-dimensional pitot tube to be calibrated with the geometric model of the wind tunnel to obtain the combined model of the three-dimensional pitot tube and the wind tunnel to be calibrated; then mesh the combined model and set the boundary conditions, and after meshing and setting the boundary conditions, obtain the static pressure value and dynamic pressure value of the fluid in the combined model respectively; wherein the static pressure value includes: the first static pressure value, the second static pressure value, the third static pressure value, the fourth static pressure value and the fifth static pressure value; finally, calculate the calibration coefficient of the three-dimensional pitot tube to be calibrated according to the static pressure value and the dynamic pressure value. That is to say, in the technical solution of the present application, the calibration coefficient of the three-dimensional pitot tube to be calibrated can be calculated according to the first static pressure value, the second static pressure value, the third static pressure value, the fourth static pressure value and the fifth static pressure value and the dynamic pressure value. In the prior art, the calibration coefficient of the three-dimensional pitot tube cannot be obtained, and thus the accuracy and reliability of the measurement results of the three-dimensional pitot tube cannot be ensured. Therefore, compared with the prior art, the numerical method for obtaining the three-dimensional Pitot tube calibration coefficient proposed in the embodiment of the present application can obtain the calibration coefficient of the three-dimensional Pitot tube, thereby ensuring the accuracy and reliability of the measurement results of the three-dimensional Pitot tube; and the technical solution of the embodiment of the present application is simple and convenient to implement, easy to popularize, and has a wider range of applications.

[0044] Figure 4 A flow chart of a numerical method for obtaining a three-dimensional pitot tube calibration coefficient provided in another embodiment of the present application. The above technical solution is further optimized and expanded, and can be combined with the above optional implementations. Figure 4 As shown, the numerical method for obtaining the three-dimensional pitot tube calibration coefficient may include the following steps:

[0045] S401, respectively establishing a geometric model of a three-dimensional pitot tube to be calibrated and a geometric model of a wind tunnel.

[0046] S402: Combining the geometric model of the three-dimensional pitot tube to be calibrated with the geometric model of the wind tunnel to obtain a combined model of the three-dimensional pitot tube to be calibrated and the wind tunnel.

[0047] S403, meshing the combined model of the three-dimensional pitot tube and the wind tunnel to be calibrated according to the current mesh parameters, and calculating the physical characteristic quantities corresponding to the reference points in the combined model under the current mesh parameters.

[0048] In this step, the combined model can be meshed, and the three-dimensional pitot tube to be calibrated can be appropriately encrypted; according to the actual flow conditions of the three-dimensional pitot tube to be calibrated, such as the inlet medium flow direction, the inlet medium mass flow rate, the outlet pressure, and the working medium temperature, the boundary conditions of the numerical calculation can be set for trial calculation; and then the independence verification can be performed based on the grid parameters. Specifically, the reference point is set, and the characteristic physical quantity of the reference point under investigation is set; the grid parameters are changed, the mesh is re-meshed, and the trial calculation is performed again; the maximum grid parameters that make the characteristic physical quantity of the reference point under investigation approach unchanged are found as the grid division parameters of the basic combined model.

[0049] In a specific embodiment of the present application, the physical feature quantity satisfies the predetermined condition that: the change in the physical feature quantity corresponding to the reference point in the combined model under the current grid parameters relative to the physical feature quantity corresponding to the reference point in the combined model under the previous grid parameters of the current grid parameters is within a predetermined error range.

[0050] S404: If the physical feature quantity does not meet the predetermined condition, the current grid parameter is modified, and the modified grid parameter is used as the current grid parameter, and the above operation is repeated until the physical feature quantity meets the predetermined condition.

[0051] S405 , setting boundary conditions according to the real flow conditions of the three-dimensional Pitot tube to be calibrated in the combined model.

[0052] The boundary conditions in the embodiments of the present application may include: inlet boundary conditions, outlet boundary conditions or wall boundary conditions. If the flow is inside a pipe, a velocity inlet or pressure inlet condition may be used; for a velocity inlet, the magnitude and direction of the velocity need to be specified; for a pressure inlet, a static pressure value needs to be specified.

[0053] S406. Obtain the static pressure value and the dynamic pressure value of the fluid respectively under the boundary conditions.

[0054] S407, calculating the calibration coefficient of the three-dimensional Pitot tube to be calibrated according to the static pressure value and the dynamic pressure value.

[0055] In this step, the first static pressure value, the second static pressure value, the fourth static pressure value, and the fifth static pressure value may be input into a pre-constructed calculation model of the pitch angle calibration coefficient, and the pitch angle calibration coefficient of the three-dimensional pitot tube to be calibrated may be calculated by the calculation model of the pitch angle calibration coefficient. In addition, the first static pressure value, the second static pressure value, and the dynamic pressure value may be input into a pre-constructed calculation model of the dynamic pressure calibration coefficient, and the dynamic pressure calibration coefficient of the three-dimensional pitot tube to be calibrated may be calculated by the calculation model of the dynamic pressure calibration coefficient.

[0056] The numerical method for obtaining the calibration coefficient of the three-dimensional pitot tube proposed in the embodiment of the present application is to first establish the geometric model of the three-dimensional pitot tube to be calibrated and the geometric model of the wind tunnel respectively; then combine the geometric model of the three-dimensional pitot tube to be calibrated with the geometric model of the wind tunnel to obtain the combined model of the three-dimensional pitot tube and the wind tunnel to be calibrated; then mesh the combined model and set the boundary conditions, and after meshing and setting the boundary conditions, obtain the static pressure value and dynamic pressure value of the fluid in the combined model respectively; wherein the static pressure value includes: the first static pressure value, the second static pressure value, the third static pressure value, the fourth static pressure value and the fifth static pressure value; finally, calculate the calibration coefficient of the three-dimensional pitot tube to be calibrated according to the static pressure value and the dynamic pressure value. That is to say, in the technical solution of the present application, the calibration coefficient of the three-dimensional pitot tube to be calibrated can be calculated according to the first static pressure value, the second static pressure value, the third static pressure value, the fourth static pressure value and the fifth static pressure value and the dynamic pressure value. In the prior art, the calibration coefficient of the three-dimensional pitot tube cannot be obtained, and thus the accuracy and reliability of the measurement results of the three-dimensional pitot tube cannot be ensured. Therefore, compared with the prior art, the numerical method for obtaining the three-dimensional Pitot tube calibration coefficient proposed in the embodiment of the present application can obtain the calibration coefficient of the three-dimensional Pitot tube, thereby ensuring the accuracy and reliability of the measurement results of the three-dimensional Pitot tube; and the technical solution of the embodiment of the present application is simple and convenient to implement, easy to popularize, and has a wider range of applications.

[0057] Figure 5 A flowchart of a numerical method for obtaining a three-dimensional pitot tube calibration coefficient provided in another embodiment of the present application. The above technical solution is further optimized and expanded, and can be combined with the above optional implementations. Figure 5 As shown, the numerical method for obtaining the three-dimensional pitot tube calibration coefficient may include the following steps:

[0058] S501 , respectively establishing a geometric model of a three-dimensional pitot tube to be calibrated and a geometric model of a wind tunnel.

[0059] S502: Combining the geometric model of the three-dimensional pitot tube to be calibrated with the geometric model of the wind tunnel to obtain a combined model of the three-dimensional pitot tube to be calibrated and the wind tunnel.

[0060] S503, meshing the combined model and setting boundary conditions. After meshing and setting boundary conditions, obtain static pressure values ​​and dynamic pressure values ​​of the fluid in the combined model respectively; wherein the static pressure values ​​include: a first static pressure value, a second static pressure value, a third static pressure value, a fourth static pressure value and a fifth static pressure value.

[0061] In one embodiment, the first static pressure value may be -191.12 Pa; the second static pressure value may be -316.71 Pa; the third static pressure value may be -316.40 Pa; the fourth static pressure value may be -336.17 Pa; and the fifth static pressure value may be -261.49 Pa.

[0062] S504: input the first static pressure value, the second static pressure value, the fourth static pressure value and the fifth static pressure value into a pre-constructed calculation model of the pitch angle calibration coefficient, and calculate the pitch angle calibration coefficient of the three-dimensional pitot tube to be calibrated by the calculation model of the pitch angle calibration coefficient.

[0063] In this step, the pitch angle calibration coefficient calculation model calculates the pitch angle calibration coefficient of the three-dimensional pitot tube to be calibrated according to the following formula: Among them, p1 is the first static pressure value, p2 is the second static pressure value, p4 is the fourth static pressure value, and p5 is the fifth static pressure value.

[0064] S505: Input the first static pressure value, the second static pressure value and the dynamic pressure value into a pre-constructed calculation model of a dynamic pressure calibration coefficient, and calculate the dynamic pressure calibration coefficient of the three-dimensional Pitot tube to be calibrated through the calculation model of the dynamic pressure calibration coefficient.

[0065] In one embodiment, the first static pressure value may be -191.12 Pa; the second static pressure value may be -316.71 Pa; and the dynamic pressure value may be 133.94 Pa. In this step, the calculation model of the dynamic pressure calibration coefficient calculates the dynamic pressure calibration coefficient of the three-dimensional pitot tube to be calibrated according to the following formula: Among them, F2 is the dynamic pressure calibration coefficient of the three-dimensional Pitot tube to be calibrated, P1 is the first static pressure value, P2 is the second static pressure value, and dp is the dynamic pressure value.

[0066] Figure 6 A graph of pitch angle calibration coefficients under different pitch angle conditions provided by an embodiment of the present application. Figure 7 The following is a graph of the dynamic pressure calibration coefficient under different pitch angle conditions provided by an embodiment of the present application. The position of the total pressure hole of the pitot tube is kept unchanged, and the pitch angle of the pitot tube relative to the incoming flow is changed by swinging the tail of the pitot tube. The pitch angle changes from -45° to +45° at fixed degree intervals, thereby changing and obtaining the geometric model of the pitot tube and the wind tunnel under different pitch angles. The combined geometric model of the pitot tube and the wind tunnel under different pitch angles of the obtained pitot tube relative to the incoming gas flow is meshed using the grid parameters and numerical calculation boundary conditions obtained in the above steps, and numerical calculations are performed using general fluid mechanics simulation software to obtain the pitch angle calibration coefficient F1 and the dynamic pressure calibration coefficient F2 under different pitch angle conditions. The pitch angle calibration coefficient F1 and the dynamic pressure calibration coefficient F2 under different pitch angle conditions are fitted using a 4th-order polynomial to obtain a pitch angle calibration curve and a dynamic pressure coefficient calibration curve, respectively, and then the "opposite" calibration process of the three-dimensional pitot tube is completed based on the numerical method.

[0067] The numerical method for obtaining the calibration coefficient of the three-dimensional pitot tube proposed in the embodiment of the present application is to first establish the geometric model of the three-dimensional pitot tube to be calibrated and the geometric model of the wind tunnel respectively; then combine the geometric model of the three-dimensional pitot tube to be calibrated with the geometric model of the wind tunnel to obtain the combined model of the three-dimensional pitot tube and the wind tunnel to be calibrated; then mesh the combined model and set the boundary conditions, and after meshing and setting the boundary conditions, obtain the static pressure value and dynamic pressure value of the fluid in the combined model respectively; wherein the static pressure value includes: the first static pressure value, the second static pressure value, the third static pressure value, the fourth static pressure value and the fifth static pressure value; finally, calculate the calibration coefficient of the three-dimensional pitot tube to be calibrated according to the static pressure value and the dynamic pressure value. That is to say, in the technical solution of the present application, the calibration coefficient of the three-dimensional pitot tube to be calibrated can be calculated according to the first static pressure value, the second static pressure value, the third static pressure value, the fourth static pressure value and the fifth static pressure value and the dynamic pressure value. In the prior art, the calibration coefficient of the three-dimensional pitot tube cannot be obtained, and thus the accuracy and reliability of the measurement results of the three-dimensional pitot tube cannot be ensured. Therefore, compared with the prior art, the numerical method for obtaining the three-dimensional Pitot tube calibration coefficient proposed in the embodiment of the present application can obtain the calibration coefficient of the three-dimensional Pitot tube, thereby ensuring the accuracy and reliability of the measurement results of the three-dimensional Pitot tube; and the technical solution of the embodiment of the present application is simple and convenient to implement, easy to popularize, and has a wider range of applications.

[0068] Figure 8 A schematic diagram of the structure of a numerical device for obtaining a three-dimensional pitot tube calibration coefficient provided in an embodiment of the present application. Figure 8 As shown, the numerical device for obtaining the three-dimensional pitot tube calibration coefficient includes: an establishment module 801, a combination module 802, an acquisition module 803 and a calculation module 804; wherein,

[0069] The establishment module 801 is used to establish a geometric model of a three-dimensional pitot tube to be calibrated and a geometric model of a wind tunnel respectively;

[0070] The combining module 802 is used to combine the geometric model of the three-dimensional pitot tube to be calibrated with the geometric model of the wind tunnel to obtain a combined model of the three-dimensional pitot tube to be calibrated and the wind tunnel;

[0071] The acquisition module 803 is used to perform grid division and boundary condition setting on the combined model, and after the grid division and boundary condition setting, respectively obtain the static pressure value and dynamic pressure value of the fluid in the combined model; wherein the static pressure value includes: a first static pressure value, a second static pressure value, a third static pressure value, a fourth static pressure value and a fifth static pressure value;

[0072] The calculation module 804 is used to calculate the calibration coefficient of the three-dimensional Pitot tube to be calibrated according to the static pressure value and the dynamic pressure value.

[0073] The numerical device for obtaining the calibration coefficient of the three-dimensional pitot tube can execute the method provided in any embodiment of the present application, and has the corresponding functional modules and beneficial effects of the execution method. For technical details not described in detail in this embodiment, please refer to the numerical method for obtaining the calibration coefficient of the three-dimensional pitot tube provided in any embodiment of the present application.

[0074] Fig. 9 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application. Fig. 9 A block diagram of an exemplary electronic device suitable for implementing the embodiments of the present application is shown. Fig. 9 The electronic device 12 shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0075] like Fig. 9 As shown, the electronic device 12 is in the form of a general purpose computing device. The components of the electronic device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that connects various system components (including the system memory 28 and the processing unit 16).

[0076] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor or a local bus using any of a variety of bus architectures. By way of example, these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0077] The electronic device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the electronic device 12, including volatile and non-volatile media, removable and non-removable media.

[0078] The system memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The electronic device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Fig. 9 not shown, usually called a "hard drive"). Although Fig. 9Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical medium) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present application.

[0079] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in the memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. The program modules 42 generally perform the functions and / or methods of the embodiments described herein.

[0080] The electronic device 12 may also communicate with one or more external devices 14 (e.g., keyboards, pointing devices, displays 24, etc.), may communicate with one or more devices that enable a user to interact with the electronic device 12, and / or may communicate with any device that enables the electronic device 12 to communicate with one or more other computing devices (e.g., a network card, a modem, etc.). Such communication may be performed via an input / output (I / O) interface 22. Furthermore, the electronic device 12 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 20. As shown, the network adapter 20 communicates with other modules of the electronic device 12 via the bus 18. It should be understood that although Fig. 9 Not shown, other hardware and / or software modules may be used in conjunction with the electronic device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0081] The processing unit 16 executes various functional applications and data processing by running the programs stored in the system memory 28, such as implementing the numerical method for obtaining the three-dimensional pitot tube calibration coefficient provided in the embodiment of the present application.

[0082] The embodiment of the present application also provides a computer storage medium.

[0083] The computer-readable storage medium of the embodiment of the present application can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, - but not limited to - a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive lists) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, a device or a device or used in combination with it.

[0084] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0085] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0086] Computer program code for performing the operation of the present application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (e.g., using an Internet service provider to connect through the Internet).

[0087] The embodiment of the present application also provides a computer program product.

[0088] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer program products, which can include one or more computer programs, which can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor, which can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0089] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A numerical method for obtaining a three-dimensional pitot tube calibration coefficient, characterized in that: The method comprises: Establishing the geometric model of the three-dimensional pitot tube to be calibrated and the geometric model of the wind tunnel respectively; Combining the geometric model of the three-dimensional Pitot tube to be calibrated with the geometric model of the wind tunnel to obtain a combined model of the three-dimensional Pitot tube to be calibrated and the wind tunnel; The combined model is meshed and boundary conditions are set. After meshing and boundary conditions are set, static pressure values ​​and dynamic pressure values ​​of the fluid are respectively obtained in the combined model; wherein the static pressure values ​​include: a first static pressure value, a second static pressure value, a third static pressure value, a fourth static pressure value, and a fifth static pressure value; The calibration coefficient of the three-dimensional Pitot tube to be calibrated is calculated according to the static pressure value and the dynamic pressure value.

2. The method according to claim 1, characterized in that Meshing and boundary condition setting of the combined model include: Meshing the combined model of the three-dimensional pitot tube to be calibrated and the wind tunnel according to current mesh parameters, and calculating the physical characteristic quantities corresponding to the reference points in the combined model under the current mesh parameters; If the physical feature quantity does not meet the predetermined condition, the current grid parameter is modified, the modified grid parameter is used as the current grid parameter, and the above operation is repeatedly performed until the physical feature quantity meets the predetermined condition; Boundary conditions are set according to the real flow conditions of the three-dimensional Pitot tube to be calibrated in the combined model.

3. The method according to claim 2, characterized in that The physical feature quantity satisfies the predetermined condition if a change in the physical feature quantity corresponding to the reference point in the combined model under the current grid parameter relative to the physical feature quantity corresponding to the reference point in the combined model under the previous grid parameter of the current grid parameter is within a predetermined error range.

4. The method according to claim 1, characterized in that: Calculating the calibration coefficient of the three-dimensional Pitot tube to be calibrated according to the static pressure value and the dynamic pressure value includes: The first static pressure value, the second static pressure value, the fourth static pressure value and the fifth static pressure value are input into a pre-constructed calculation model of a pitch angle calibration coefficient, and the pitch angle calibration coefficient of the three-dimensional pitot tube to be calibrated is calculated by the calculation model of the pitch angle calibration coefficient.

5. The method according to claim 4, characterized in that The calculation model of the pitch angle calibration coefficient calculates the pitch angle calibration coefficient of the three-dimensional pitot tube to be calibrated according to the following formula: Among them, p1 is the first static pressure value, p2 is the second static pressure value, p4 is the fourth static pressure value, and p5 is the fifth static pressure value.

6. The method according to claim 1, characterized in that Calculating the calibration coefficient of the three-dimensional Pitot tube to be calibrated according to the static pressure value and the dynamic pressure value includes: The first static pressure value, the second static pressure value and the dynamic pressure value are input into a calculation model of a dynamic pressure calibration coefficient that is pre-constructed, and the dynamic pressure calibration coefficient of the three-dimensional pitot tube to be calibrated is calculated by the calculation model of the dynamic pressure calibration coefficient.

7. The method according to claim 6, characterized in that The calculation model of the dynamic pressure calibration coefficient calculates the dynamic pressure calibration coefficient of the three-dimensional pitot tube to be calibrated according to the following formula: Among them, F2 is the dynamic pressure calibration coefficient of the three-dimensional Pitot tube to be calibrated, P1 is the first static pressure value, P2 is the second static pressure value, and dp is the dynamic pressure value.

8. A numerical device for obtaining a three-dimensional pitot tube calibration coefficient, characterized in that: The device comprises: a building module, a combining module, an acquiring module and a calculating module; wherein, The establishment module is used to respectively establish a geometric model of a three-dimensional pitot tube to be calibrated and a geometric model of a wind tunnel; The combining module is used to combine the geometric model of the three-dimensional pitot tube to be calibrated with the geometric model of the wind tunnel to obtain a combined model of the three-dimensional pitot tube to be calibrated and the wind tunnel; The acquisition module is used to perform grid division and boundary condition setting on the combined model, and after the grid division and boundary condition setting, respectively obtain the static pressure value and dynamic pressure value of the fluid in the combined model; wherein the static pressure value includes: a first static pressure value, a second static pressure value, a third static pressure value, a fourth static pressure value and a fifth static pressure value; The calculation module is used to calculate the calibration coefficient of the three-dimensional Pitot tube to be calibrated according to the static pressure value and the dynamic pressure value.

9. An electronic device, characterized in that: include: one or more processors; a memory for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the numerical method for obtaining the three-dimensional Pitot tube calibration coefficient according to any one of claims 1 to 7.

10. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the numerical method for obtaining the three-dimensional pitot tube calibration coefficient according to any one of claims 1 to 7 is implemented.

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