Sand wind environment wind tunnel experiment model device for simulating different field wind directions

Abstract

The invention relates to a sand wind environment wind tunnel experiment model device for simulating different field wind directions. The sand wind environment wind tunnel experiment model device is characterized in that cylindrical roll balls are placed on the circumference of a circular roll ball tray arranged on a lifting support to support an experiment platform; the experiment platform is a circular disc, a sample is placed on the experiment platform, the disc is marked with a 360-degree dividing rule, a circumference rotating track is arranged below the experiment platform, a platform rotating shaft is arranged in the middle of the experiment platform, the bottom of the platform rotating shaft is provided with a variable speed big gear, a control switch controls a stepping motor, a stepping motor rotating shaft drives a small gear to rotate, the small gear drives the big gear at the bottom of the platform rotating shaft to rotate, the big gear drives the platform rotating shaft and the experiment platform to rotate, the circular roll ball tray on the lifting support on the lower portion is driven by the circumference rotating track below the experiment platform to rotate, and the experiment platform is embedded in the bottom of a sand wind environment wind tunnel experiment section to be flush with the bottom of the wind tunnel experiment section. The sand wind environment wind tunnel experiment model device can simulate the field wind directions comprehensively, solves the problem of the wind direction simulating error under changeable wind velocities and directions and provides experiment conditions for studying the sand wind movement characteristics under conditions of the different wind directions and the different wind velocities.

Description

technical field [0001] The invention relates to an experimental device for simulating different wind directions in the field by a wind tunnel experimental model in a wind-sand environment. [0002] Background technique [0003] The wind tunnel test in the wind and sand environment is a large-scale instrument and equipment designed to simulate the phenomenon of wind and sand in the field. A wind tunnel in a windy and sandy environment is generally divided into a power system, a steady flow section, a contraction section, a test section, and a diffusion section. In the simulation experiment of the wind and sand phenomenon, the wind speed is continuously changed in the range of 2 m / s to 40 m / s, and the wind speed is controlled by the manual transmission. In scientific experiment activities, the wind direction in the wind tunnel is fixed and single, and the wind direction cannot change 360° like in the wild. Therefore, it is an important physical quantity for the research and...

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Problems solved by technology

However, in the experimental research of wind and sand environment tunnel observation of wind and sand movement, there is such a problem, that is, after a wind direction exp

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