Force and flow field correlation asynchronous measurement method and system

A measurement method and correlation technology, which can be applied to measurement devices, use of differential pressure to measure fluid velocity, aerodynamic tests, etc., can solve problems such as complex control operations, and achieve the effects of simple control operations, accurate judgment results, and simple operations.

Active Publication Date: 2020-08-07
CHINA AUTOMOTIVE ENG RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention intends to provide an asynchronous measurement method and system for the correlation between force and flow field, so as to solve the problem of complicated control operation due to the lack of an effective trigger sequence to control the work of each sensor in the existing multi-sensor asynchronous measurement method

Method used

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  • Force and flow field correlation asynchronous measurement method and system
  • Force and flow field correlation asynchronous measurement method and system
  • Force and flow field correlation asynchronous measurement method and system

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Embodiment 1

[0027] The fluid in this embodiment is air flow as an example, and the corresponding test area is a wind tunnel as an example. In other embodiments, the fluid may also be water flow. Basic as attached figure 1 with figure 2 Shown: the asynchronous measurement system for the correlation between force and flow field, including the test system built in the wind tunnel, and a flat plate 10 is set in the wind tunnel to create an experimental environment for the flat plate boundary layer. The test system includes a test model, a measuring device and a control terminal 2 . In this embodiment, the wind tunnel experiment of the influence of upstream disturbance on the aerodynamic load and wake characteristics of the square column model 8 in the boundary layer 101 is taken as an example. The test model is the square column model 8, and the square column model 8 is vertically arranged in the wind tunnel. Inside, the bottom end of the square column model 8 is installed in the middle of...

Embodiment 2

[0052] The difference from Embodiment 1 is that in order to obtain multiple measurement data, in this embodiment, when building the test system, the PIV camera 6 and the PIV laser 13 are also installed on the moving measurement mechanism 5, so that after completing one After the measurement data is measured, according to the test requirements, when the data of different positions need to be collected, the installation positions of the PIV camera 6, the PIV laser 13 and the hot wire probe 12 can be changed through the moving measurement mechanism 5, so as to realize the data collection of different positions .

Embodiment 3

[0054] The difference from Embodiment 1 and Embodiment 2 is that the test system in this embodiment also includes a compensation subsystem, and the compensation subsystem includes a hollow column 301, such as image 3 As shown, the upper end of the hollow column 301 is provided with an air inlet, and one side of the hollow column 301 is provided with an air outlet 303. The hollow column 301 is vertically installed in the test area and is located at the center of the leeward side of the Pitot tube 3. The air outlet 303 Vertically arranged along the hollow column 301, the top of the hollow column 301 is provided with an air inlet.

[0055] The side wall of the air outlet 303 of the hollow column 301 is provided with an adjustment mechanism, and the adjustment structure includes swing plates 305 located on both sides of the air outlet 303 , and the connecting end of the swing plate 305 is hinged to the side wall of the air outlet 303 .

[0056] Considering that the airflow will g...

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Abstract

The invention relates to the technical field of flow field measurement. In order to solve the problem that in an existing multi-sensor asynchronous measurement mode, control operation is complex due to the fact that effective triggering time sequence control over work of all sensors is lacked, the force and flow field correlation asynchronous measurement method is provided and comprises the following step: test system construction: installing a test model and measurement equipment; parameter setting: setting acquisition parameters of the measurement equipment; acquisition time sequence setting: drawing up the acquisition time sequence of the measurement equipment; and data acquisition: after the test area operates stably, controlling measurement equipment to perform measurement according to an acquisition time sequence to obtain measurement data. According to the scheme, orderly control over the measuring equipment is achieved.

Description

technical field [0001] The invention relates to the technical field of flow field measurement, in particular to an asynchronous measurement method and system for the correlation between force and flow field. Background technique [0002] As a branch of mechanics, fluid mechanics mainly studies the static state and motion state of the fluid itself under the action of various forces, as well as the interaction and flow law when there is relative motion between the fluid and solid boundary walls. In fluid mechanics, the physical quantities of the flow field often have strong time-varying and three-dimensional characteristics, and the physical quantities are not completely independent, and there are strong or weak correlations, such as the resistance of the blunt body structure in the flow field, The lift force is closely related to the pressure distribution, flow velocity and vorticity of the fluid. In addition, the time-varying process of physical quantities in the flow field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06G01P5/16
CPCG01M9/06G01M9/067G01P5/16
Inventor 周舟徐胜金王庆洋王勇鲍欢欢
Owner CHINA AUTOMOTIVE ENG RES INST
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