Natural wind simulation method for wind erosion wind tunnel experiment

A technology of wind tunnel experiment and simulation method, applied in the field of wind tunnel experiment, which can solve the problems of reduced credibility and lack of authenticity of experimental data

Inactive Publication Date: 2019-05-31
SHENYANG AEROSPACE UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

However, although the wind erosion tunnel is different from the traditional wind tunnel in structure, the control of the wind erosion wind tunnel for the experimental wind speed is still a stable wind spee

Method used

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  • Natural wind simulation method for wind erosion wind tunnel experiment

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] In this embodiment, the equipment used to collect wind speed data at the wind erosion site is a FC-1W-2 wireless anemometer, and it is set to collect wind speed data every 3 seconds.

[0019] A natural wind simulation method for wind erosion wind tunnel experiments, comprising the steps of:

[0020] Step 1: Collect wind speed data of natural wind at the wind erosion site. The wind speed data are divided into four groups, including spring wind speed data, summer wind speed data, autumn wind speed data and winter wind speed data. The collection time of the four groups of wind speed data is 7 days, and The wind speed data of 7 days are all collected in a continuous collection mode, and finally the natural wind wind speed database is formed by four groups of wind speed data; Continuous collection of wind speed data;

[0021] Step...

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Abstract

The invention relates to a natural wind simulation method for a wind erosion wind tunnel experiment. The method includes the following steps that: four groups of natural wind speed data are collected;any group of wind speed data is selected from a wind speed database, the maximum wind speed and minimum wind speed of the selected wind speed data are extracted, time t for wind speed to change to the maximum wind speed from the minimum wind speed is determined, and the ratio K of the cumulative time t to the total time of the data is solved; the average interval time of the presence of the maximum wind speed and minimum wind speed is set to be 0.5T, and time t' taken by each wind speed in a p 0.5T period is calculated according to 0.5KT, and each wind speed is corresponding to t' in the 0.5Tperiod from small to large, a curve about the change of the natural wind speed with time in the 0.5T period is formed, and a curve about the change of the natural wind speed with the time in a complete period T is formed; a curve about the change of the natural wind speed with the time in the complete period T under the other three groups of wind speed data is obtained; and air blow is adjusted according to wind speeds in the above curves, the wind speed control signal curve of a wind erosion wind tunnel, which is formed by the voltage signals of a speed governor and t', is measured, and airblow is adjusted according to the curve, so that natural wind can be simulated.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel experiments, in particular to a natural wind simulation method for wind erosion wind tunnel experiments. Background technique [0002] Wind erosion is the erosion effect of wind, which refers to the process in which surface materials are eroded, abraded and taken away under the action of wind. When the wind blows over the surface, turbulence is generated to make the sand leave the surface, thereby destroying the surface material, which is called blowing erosion; when the wind and sand flow moves close to the ground, the impact and friction of the sand on the ground material are eliminated. called abrasion. In the dry area with many windy days and high wind speed, wind erosion is very prevalent. On the steep rock wall, small caves and pits of different sizes and shapes are formed by wind erosion, which are called wind erosion niches; isolated and protruding rocks After long-term wind erosion,...

Claims

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Application Information

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IPC IPC(8): G01M9/04G01M9/06
Inventor 李国文朱建勇王成军张庆营
Owner SHENYANG AEROSPACE UNIVERSITY
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