High speed dust storm saltation test observation system

Abstract

The invention relates to a high speed dust storm saltation test observation system, characterized in that a pressure regulating valve, an electromagnetic switch valve, a time control switch, a sand blasting gun and a sand supply device are commonly fixed on a work panel; a power device is successively in connection with the pressure regulating valve, the electromagnetic switch valve and the sand blasting gun through a flexible pipe; the time control switch is in connection with a power supply, and is respectively in connection with the power supply and the electromagnetic switch valve through leads; the sand port of the sand supply device is in connection with the sand supply device; a test platform is located between a saltation dust collector and the sand blasting gun. The system can simulate continuously adjustable stable wind conditions with a wind speed greater than 150 m / s, and accurately control wind speed and effect time, and has the characteristics of convenient operation, easy control, portable equipment, simple disassembly and convenient transfer; the system is suitable for test observation such as dust storm saltation observation, wind speed wind pressure, wind erosion and polishing, sediment transport, etc. under heavy wind conditions, and microscopic research such as particle speed, concentration, etc., and provides basic test equipment for dust storm motion rules and process research under special conditions.

Description

technical field [0001] The invention relates to a simulation and observation system for the jump of aeolian sand material under strong wind conditions. Specifically, it is a test and observation device for observing the jump height, jump trajectory and sand volume change with height after sand particles hit obstacles such as different surfaces or gravels under simulated strong wind conditions. Background technique [0002] Leap is the main form of material transport of wind-blown sand, and 70% of the sand in the wind-blown sand flow is transported in the form of leap. In traditional research, it is generally believed that the jump height of sand particles is less than a dozen centimeters, mainly concentrated below 10 centimeters. The observation equipment developed and the observation work carried out from this are all aimed at lower spaces, such as sand collectors used in field observations. The height is generally below 1m; in the wind tunnel simulation test, limited by...

AI Technical Summary

Problems solved by technology

For example, in the famous Bailifeng area, the wind speed can reach more than 60m / s, which can overturn the moving train and cause accidents; Substances can climb over the heavy protective facilities along the railway and the 3.3m-high windshield wall on the railway shoulder and deposit near the railway tracks, affecting the safe operation of trains and difficult to remove

This kind of special sandstorm activity under the Gobi windy conditions is beyond the scope of traditional sandstorm scientific experiments, because such a strong wind force cannot be simulated stably by various sandstorm wind tunnel tests, and the height of the sand grain jump is far beyond It is difficult to carry out observations under the condition of strong wind and turbulence in the field, and it is impossible to accurately correspond the sand particle jump to the wind speed.

[0004] At present, no research has been carried out at home and abroad on the jump height of sand particles under strong wind conditions (that is, far exceeding the traditional research range of 20-30m / s wind speed). It is of great significance to adjust the existing sandstorm protection strategies and maintain the normal operation of the line.

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