Backflow type wind tunnel device for simulating Mars low-pressure low-density dust storm environment

Abstract

The invention provides a backflow-type wind tunnel device for simulating a Mars low-pressure low-density dust storm environment. The device comprises a backflow-type wind tunnel, an ejector, and an jetting device; the backflow-type wind tunnel comprises a stable segment, a contraction segment, a test segment, a first diffusion segment, a second diffusion segment, a mixing segment, a third diffusion segment, and a large-angle diffusion segment; a first corner is arranged between the first diffusion section and the second diffusion section in a communicated manner; a second corner is arranged between the second diffusion section and the mixing section in a communicated manner;a third corner and a fourth corner are sequentially arranged between the third diffusion section and the large-angle diffusion section in a communicated manner;a corner flow deflector is arranged in each corner; the ejector is arranged in the mixing section; and the jetting device is arranged in the contraction section. The ejector is combined with the backflow-type wind tunnel, the wind speed required by the test section can be achieved through the small inlet pressure of the ejector; the mode of combining the large contraction ratio and the large-angle diffusion section is adopted, so that the airflow quality is improved, losses are reduced, the overall size of the wind tunnel is reduced, and the vacuumizing cost is reduced.

Description

technical field

[0001] The invention belongs to the field of ground simulation of space environment for deep space exploration, and in particular relates to a backflow type wind tunnel device for simulating Martian low-pressure and low-density dust storm environment. Background technique

[0002] The Mars Wind Tunnel is a simulation device developed for the extreme environment of Mars. my country’s Tianwen-1 has been launched, but for the Tianwen-1 Mars rover, only the existing technology can be used to simulate wind and heat at low wind speeds. The Martian environment is most notably low pressure, high wind speed, and sandy dust environment. Therefore, it is necessary for us to design a wind tunnel that can simulate the low pressure, high wind speed, and sandy dust environment on Mars. Due to the large size of the Mars rover, the required test section The size is also very large. For a linear wind tunnel, a large vacuum chamber is required outside to complete the formation of...

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