Mars wind tunnel with sand and dust simulation

Abstract

The invention aims at providing a Mars wind tunnel with sand and dust simulation. The wind tunnel is horizontally arranged in a vacuum container and comprises a collector, a stable section, a contraction section, a test section, an ejector section, an outlet diffusion section, an ejector, and a first diffusion section. The test section is connected with the first diffusion section; the first diffusion section is connected with the ejector section; the ejector section is connected with the diffusion section, a transitional equal straight section is arranged between the ejector section and the diffusion section, and the ejector is arranged at the inlet of the ejector section. The diffusion angle of the first diffusion section is not more than 5 degrees, and the cross section area of the inlet of the ejector section is larger than that of the outlet of the test section. Compared with the prior art, simulation of the wind speed of 5-100 m / s in a large-span range can be achieved under the air pressure of 100 Pa only by consuming a small amount of air, the flow field of the test section is uniform and stable, and the sand and dust environment of the Mars can be simulated under the low air pressure.

Description

technical field [0001] The invention relates to a Martian wind tunnel with sand and dust simulation. Background technique [0002] Wind tunnels are generally used to study the aerodynamic performance of aircraft and its related design. Conventional wind tunnels are developed for designing aircraft flying in the surface atmosphere. The Mars Wind Tunnel is an experimental simulation device developed for the Mars atmospheric flight environment. Different from conventional wind tunnels, the Mars Wind Tunnel can simulate the gas composition, atmospheric pressure, density and flow field environment on the surface of Mars. The atmosphere of Mars is very thin. The main component of the atmosphere is carbon dioxide. The density of the atmosphere is about 1% of that of the earth (similar to the density at the height of 30-40km on the earth's surface). The average pressure on the surface of Mars is only 600Pa. Local or regional sandstorms on Mars can Occurs frequently in different sea...

AI Technical Summary

Problems solved by technology

Due to the large difference between the atmospheric environment on the surface of Mars and the surface of the earth, the conventional atmospheric environment wind tunnel cannot meet the needs of further simulating the atmospheric environment of Mars

Conventional DC wind tunnels usually use motors or ejectors as the driving source. When motors are used as drives, the wind speed required for Mars simulation tests cannot be formed in a low-pressure environment. When ordinary ejectors are used as drives , the ejected air flow is easy to form a saturated blocking phenomenon at the outlet, and it is impossible to achieve high wind speed simulation in a low pressure environment

In addition, it is difficult for conventional sand and dust simulation to maintain a high consistency with wind speed in a low-pressure environment, and it is even more difficult to ensure the uniformity of sand and dust distribution in the test section

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