Wind tunnel system in low-temperature and low-pressure wind-sand environment

Abstract

The invention discloses a wind tunnel system in a low-temperature and low-pressure wind-sand environment, wherein the system comprises a backflow type direct blowing wind tunnel unit, a power unit, a low-temperature unit, a low-pressure unit and an environmental parameter monitoring and wind-sand movement testing unit; the backflow type direct blowing wind tunnel unit comprises a power section, a diffusion section, a rectification section, a contraction section, an experiment section, and a sand accumulation section which are arranged successively; the power unit comprises a fan arranged on the power section and is at least used for regulating and controlling the wind speed of the wind tunnel unit; the low-temperature unit is matched with the wind tunnel unit and is at least used for regulating and controlling the air temperature in the wind tunnel unit; the low-pressure unit is communicated with the wind tunnel unit and is at least used for regulating and controlling the air pressure in the wind tunnel unit; and the environmental parameter monitoring and wind-sand movement testing unit is at least used for detecting air temperature, air pressure, wind speed and the like in the wind tunnel unit. The system can be used for simulating soil wind erosion, wind sand movement and wind sand landform development processes in various extreme climate change scenes, special environments such as Qinghai-Tibet Plateau, Antarctic Pole and Arctic Pole and planetary environments such as Mars.

Description

technical field [0001] The invention relates to a wind tunnel, in particular to a low-temperature, low-pressure wind-sand environment wind tunnel system. Background technique [0002] Aeolian landforms are widely distributed on the earth, and are also found on Mars, Venus, Pluto, and satellites such as Titan, Triton, and Io. Aeolian activity is the only active surface process on planets such as Mars, which is of great significance for studying the climate history and future evolution of planets, and has many similarities with the aeolian landform on Earth, which can be used for comparative studies. The wind and sand environment is complex and diverse, and various environmental factors span a large span. For example, inland deserts are generally hot and dry, while the Qinghai-Tibet Plateau and polar regions are windy, cold, and the air is thin. There are huge differences in the size of the forming landform types. [0003] The main characteristics of environments such as pla...

AI Technical Summary

Problems solved by technology

[0005] In recent years, with the rise of space exploration activities, the United States, Europe, Japan and other developed countries and regions have tried to develop some low-temperature and low-pressure wind tunnels, but these wind tunnels have more or less deficiencies, for example, construction and The operating cost is very high, but it can only simulate room temperature conditions, or cannot simulate the movement of wind and sand, making it difficult to carry out real wind and sand experiments, etc.

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