High-speed periodic oscillatory flow field measurement method, system, device and medium

Abstract

The application provides a high-speed periodic oscillation flow field measurement method, system, device and medium based on phase locking and synchronous control, wherein the method comprises the following steps: measuring flow field information through a pressure sensor, and acquiring characteristic phases and characteristic values in each cycle of the flow field; a synchronous controller generates a synchronization signal based on the acquired characteristic phases, and sends the synchronization signal to the PIV system and the PSP system; the PIV system and the PSP system collect flow field information under the control of the synchronization signal, and acquire flow field information at different phases in a cycle; and the flow field in a cycle is information-fitted and reconstructed according to the flow field information at different phases in a cycle, and an intuitive flow map of the periodic oscillation flow field is acquired. The application controls the PIV and the PSP to shoot flow images through accurate triggering of different characteristic phases, thereby periodically reconstructing the velocity field and the pressure field of the flow, providing intuitive and profound physical images, and achieving information acquisition of the high-speed oscillation quasi-periodic flow field.

Description

Technical Field

[0001] This document relates to the field of high-speed flow field measurement technology, and in particular to a high-speed periodic oscillation flow field measurement method, system equipment and medium based on phase-locked loop and synchronous control. Background Technology

[0002] In high-speed flow fields, many structures generate quasi-periodic oscillating flows, such as the flow in the compression corner separation zone of the air intake of a high-speed aircraft and the internal flow in the weapon bay of a fighter jet / bomber. These periodic oscillating flows will generate severe pressure pulsations, induce strong noise and structural vibrations, and have a very adverse effect on the airframe.

[0003] Therefore, accurately measuring and acquiring the spatial flow field or surface flow characteristics of periodic oscillating flows is crucial, as it can guide the design of high-speed aircraft. Currently, commonly used measurement methods include particle image measurement (PIV) to obtain the spatial velocity field or pressure-sensitive paint (PSP) to measure the pressure distribution on the surface. However, the oscillation frequency of high-speed periodic oscillating flow fields is usually very high, while the acquisition frequency of traditional flow display measurement methods is relatively low, making it difficult to capture the oscillating changes in the flow and obtain the periodic variation characteristics of the flow. This results in a lack of corresponding information when reconstructing the flow field dynamics. Summary of the Invention

[0004] This invention aims to solve the above-mentioned problems by providing a method, system, device, and medium for measuring high-speed periodic oscillation flow fields based on phase-locked loop and synchronous control.

[0005] This invention provides a method for measuring high-speed periodic oscillating flow fields based on phase-locked loop and synchronous control, comprising:

[0006] S1. Measure the flow field information using a pressure sensor to obtain the characteristic phase and characteristic value of the flow field in each cycle;

[0007] S2. After generating a synchronization signal based on the acquired characteristic phase, the synchronization controller sends the synchronization signal to the PIV system and the PSP system.

[0008] The S3, PIV, and PSP systems acquire flow field information at different phases within a period under the control of a synchronization signal.

[0009] S4. Based on the flow field information of different phases within the period, the periodic flow field is reconstructed by information fitting to obtain an intuitive flow pattern of periodic oscillation of the flow field.

[0010] This invention provides a high-speed periodic oscillation flow field measurement system based on phase-locked loop and synchronous control, comprising:

[0011] Pressure sensor, synchronization controller, flow field acquisition module, and analysis module;

[0012] A pressure sensor, connected to a synchronization controller, is used to measure flow field information and analyze the characteristic phase and characteristic value of the flow field in each cycle.

[0013] The synchronization controller, connected to the pressure sensor and flow field acquisition module, is used to generate a synchronization control signal when it receives the characteristic phase and characteristic value sent by the pressure sensor, and then sends the synchronization control signal to the flow field acquisition module.

[0014] The flow field acquisition module, connected to the synchronization controller, is used to acquire flow field information at different phases within a period under the control of the synchronization signal.

[0015] The analysis module, connected to the flow field acquisition module, is used to reconstruct the periodic flow field by fitting information based on flow field information at different phases within the period, and to obtain an intuitive flow map of the periodic oscillation of the flow field.

[0016] This invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor, when executing the computer program, implements the steps of the high-speed periodic oscillation flow field measurement method based on phase-locked loop and synchronization control.

[0017] This invention provides a computer-readable storage medium storing a computer program, characterized in that, when executed by a processor, the computer program implements the steps described in the high-speed periodic oscillation flow field measurement method based on phase-locked loop and synchronization control.

[0018] This invention, through precise triggering of different characteristic phases, controls PIV or PSP to capture flow images, thereby periodically reconstructing the velocity and pressure fields of the flow, providing intuitive and profound physical images, realizing the acquisition of information on high-speed oscillating quasi-periodic flow fields, and providing technical support for the development of high-speed aircraft. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in one or more embodiments of this specification or in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a flowchart of a high-speed periodic oscillation flow field measurement method based on phase-locked loop and synchronization control, according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of a high-speed periodic oscillation flow field measurement system based on phase-locked loop and synchronization control, according to an embodiment of the present invention. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this document.

[0023] Method Implementation Examples

[0024] This invention provides a method for measuring high-speed periodic oscillation flow fields based on phase-locked loop and synchronization control. Figure 1 This is a flowchart of a high-speed periodic oscillation flow field measurement method based on phase-locked loop and synchronization control according to an embodiment of the present invention. Figure 1 As shown, the high-speed periodic oscillation flow field measurement method based on phase-locked loop and synchronization control in this embodiment of the invention includes:

[0025] S1. Measure the flow field information using a pressure sensor to obtain the characteristic phase and characteristic value of the flow field in each cycle;

[0026] S2. After generating a synchronization signal based on the acquired characteristic phase, the synchronization controller sends the synchronization signal to the PIV system and the PSP system.

[0027] The S3, PIV, and PSP systems acquire flow field information at different phases within a period under the control of a synchronization signal.

[0028] S4. Based on the flow field information of different phases within the period, the periodic flow field is reconstructed by information fitting to obtain an intuitive flow pattern of periodic oscillation of the flow field.

[0029] In this embodiment of the invention, the pressure sensor in step S1 has a response of not less than 1MHz and a resolution better than 10Pa.

[0030] In this embodiment of the invention, step S3 synchronously controls the PIV and PSP operating systems to acquire the flow field, and the synchronization control time is better than 1 ns.

[0031] The embodiments of the present invention have the following beneficial effects:

[0032] This technology solves the problem of low shooting frequency in traditional flow display measurement technology, which makes it difficult to reach the oscillation frequency of high-speed oscillating flow fields. It enables the acquisition of dynamic information of periodic flow fields, providing technical support for the development of high-speed aircraft.

[0033] System Implementation Examples

[0034] This invention provides a high-speed periodic oscillation flow field measurement system based on phase-locked loop and synchronous control. Figure 2 This invention relates to a high-speed periodic oscillation flow field measurement system based on phase-locked loop and synchronous control, according to... Figure 2 As shown, the high-speed periodic oscillation flow field measurement system based on phase-locked loop and synchronization control according to an embodiment of the present invention includes:

[0035] Pressure sensor 20, synchronization controller 22, flow field acquisition module 24, and analysis module 26;

[0036] Pressure sensor 20, connected to synchronous controller 22, is used to measure flow field information and analyze the characteristic phase and characteristic value of the flow field in each cycle.

[0037] The synchronization controller 22 is connected to the pressure sensor 20 and the flow field acquisition module 24. It is used to generate a synchronization control signal when it receives the characteristic phase and characteristic value sent by the pressure sensor 20, and send the synchronization control signal to the flow field acquisition module 24.

[0038] The flow field acquisition module 24 is connected to the synchronization controller 22 and is used to acquire flow field information at different phases within a period under the control of the synchronization signal.

[0039] The analysis module 26 is connected to the flow field acquisition module 24 and is used to perform information fitting and reconstruction of the periodic flow field based on the flow field information of different phases within the period, so as to obtain an intuitive flow pattern of periodic oscillation of the flow field.

[0040] This invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the steps of the method embodiments described above.

[0041] Device Example 2

[0042] A computer-readable storage medium storing a computer program, characterized in that the computer program, when executed by a processor, implements the steps of the method embodiments described above.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-speed periodic oscillation flow field measurement method based on phase-locked and synchronous control, characterized in that, The method comprises the following steps: S1, measuring flow field information by a pressure sensor to obtain characteristic phase and characteristic value of each cycle of the flow field; S2, a synchronization controller generates a synchronization signal based on the obtained characteristic phase, and sends the synchronization signal to a PIV system and a PSP system; S3, the PIV system and the PSP system collect flow field information at different phases in a cycle under the control of the synchronization signal; S4, reconstructing the flow field in the cycle according to the flow field information at different phases in the cycle to obtain a direct flow map of the flow field cycle oscillation; In the step S3, the PIV system and the PSP system collect flow field information at the same phase each time.

2. The method of claim 1, wherein, In the step S1, the response of the pressure sensor is greater than or equal to 1 MHz, and the resolution is greater than or equal to 10 Pa.

3. The method of claim 1, wherein, In the step S2, the time interval of the synchronization signal control is less than or equal to 1 ns.

4. A high-speed periodic oscillation flow field measurement system based on phase-locked and synchronous control, characterized in that, The method comprises the following steps: a pressure sensor, a synchronization controller, a flow field collection module, and an analysis module; The pressure sensor is connected with the synchronization controller, and is used to measure flow field information and analyze characteristic phase and characteristic value of each cycle of the flow field; The synchronization controller is connected with the pressure sensor and the flow field collection module, and is used to generate a synchronization signal when receiving the characteristic phase and the characteristic value sent by the pressure sensor, and send the synchronization signal to the flow field collection module; The flow field collection module is connected with the synchronization controller, and is used to collect flow field information at different phases in a cycle under the control of the synchronization signal; The analysis module is connected with the flow field collection module, and is used to reconstruct the flow field in the cycle according to the flow field information at different phases in the cycle to obtain a direct flow map of the flow field cycle oscillation; The flow field collection module specifically comprises a PIV system and a PSP system, and the PIV system and the PSP system collect flow field information at the same phase each time.

5. The system of claim 4, wherein, The response of the pressure sensor is greater than or equal to 1 MHz, and the resolution is greater than or equal to 10 Pa.

6. The system of claim 5, wherein, The control time interval of the control signal generated by the synchronization controller is less than or equal to 1 ns.

7. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to realize the steps of the high-speed cycle oscillation flow field measurement method based on phase locking and synchronization control in any one of claims 1-3.

8. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 7. The computer program is executed by the processor to realize the steps of the high-speed cycle oscillation flow field measurement method based on phase locking and synchronization control in any one of claims 1-3.

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