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Wind tunnel experiment method and device

A technology of wind tunnel experiment and experimental model, applied in the field of analysis and measurement, can solve the problem of inaccurate flow field structure, achieve the effect of accurate flow field structure and improve precision

Inactive Publication Date: 2017-11-17
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Application Information

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Problems solved by technology

[0005] This application provides a wind tunnel experiment method and device to solve the problem of inaccurate flow field structure caused by the existing speed measurement method, so as to provide a reference for analyzing the wind damage phenomenon of transmission lines

Method used

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  • Wind tunnel experiment method and device

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Experimental program
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Embodiment Construction

[0040] See figure 1 , A flowchart of a wind tunnel experiment method provided by this embodiment of the application. The method includes:

[0041] S100, turning on free wind in the direction of the experimental model area, and the experimental model is placed in the experimental section of the wind tunnel. Free wind speed selection 8ms -1 , 10ms -1 , 15ms -1 , 20ms -1 , 25ms -1 , 30ms -1 , 35ms -1 Wait for seven levels.

[0042] S200: Release the tracer particles to make the tracer particles move in the free wind; the free wind drives the tracer particles to move, so that the tracer particles can be evenly distributed in the entire experimental section.

[0043] S300, irradiate the tracer particles in the experimental model area; when the tracer particles are irradiated, the tracer particles have been fully mixed with the airflow. At this time, the movement state of the tracer particles can represent the airflow in the experimental area. Movement status.

[0044] S400: Collect an im...

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Abstract

The invention discloses a wind tunnel experiment method and device. According to the method, free wind starts in the experiment model area direction; tracer particles are released, and the tracer particles are made to move in the free wind; the tracer particles in an experiment model area are irradiated; an image of the experiment model area is acquired; the image is analyzed, and a flow velocity is calculated; flow field parameters are acquired according to the flow velocity; and lastly, according to the flow field parameters, wind damage formation conditions of a power transmission line are determined. The method is advantaged in that based on the particle image velocity measurement technology, the mountain ravine landform and heavy wind disaster-caused process is really simulated, three-dimensional flow field measurement precision is improved, the more accurate flow field structure can be acquired, the wind damage conditions under different wind speed wind direction conditions can be better determined, and reliable reference is provided for complex landform flow field measurement model making and the turbulent boundary layer value simulation technology.

Description

Technical field [0001] This application relates to the field of analysis and measurement technology, and in particular to a wind tunnel experiment method and device. Background technique [0002] my country is a country dominated by mountainous landforms, and nearly 65% ​​of the area is mountainous. The wind field of mountainous terrain is different from the wind field of flat terrain. The complex terrain of mountainous area will significantly change the vertical distribution of wind speed and turbulence structure of near-surface flow, thus forming the unique wind field structure characteristics of mountainous terrain, such as mountain wind , Canyon Wind, etc. The wind damage caused by these peculiar wind farm structures will have a great impact on power transmission lines, and in turn will cause huge economic losses. [0003] At present, in order to avoid the impact of wind damage on transmission lines, most of the wind tunnel experiments are used to measure the wind speed of mo...

Claims

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Application Information

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IPC IPC(8): G01M9/00
CPCG01M9/00
Inventor 申元黄修乾程志万邹德旭周超潘浩黑颖顿
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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