Overall structure of a three-branch series hypersonic wind tunnel

Abstract

The invention discloses an overall structure of a hypersonic wind tunnel with three branches connected in series, comprising branches that divide the Mach number simulation range of the hypersonic wind tunnel from 3 to 10 into three intervals, and the three branches are respectively large flow The low-pressure cold air branch, the large-flow medium-temperature and medium-pressure branch, and the medium-small flow high-temperature and high-pressure branch, the Mach number operating range of the large-flow low-pressure cold air branch is less than or equal to Mach number 4, and the high-flow medium-temperature and medium-pressure branch The Mach number operating range is greater than 4 and less than or equal to 7, and the Mach number operating range of the small and medium flow high temperature and high pressure branch is greater than 7 and less than or equal to 10; the overall structure of a three-branch series hypersonic wind tunnel provided by the present invention can be Through the method of step-by-step implementation, the requirements of advanced hypersonic wind tunnel for wide parameter simulation are realized; the operation status of the wind tunnel is convenient to switch, and the layout of the wind tunnel is simple, which is conducive to the safe operation and standardized management of the wind tunnel.

Description

technical field [0001] The invention relates to the field of hypersonic wind tunnel test equipment, in particular to an overall structure of a three-branch series hypersonic wind tunnel. Background technique [0002] The hypersonic wind tunnel is the basic equipment for the research and development of hypersonic vehicles and aerodynamics research. It is an important ground facility platform to meet the strategic needs of the long-term development of the national defense and aerospace industry. It provides support for the optimization, verification and assessment of the aerodynamic design of major national models. . A hypersonic wind tunnel with advanced performance should have the advantages of wide simulation range, good flow field quality, and high operating efficiency. [0003] The construction of a hypersonic wind tunnel is difficult, the construction period is long, and the amount of investment is large. When applying for the establishment of a hypersonic wind tunnel p...

AI Technical Summary

Problems solved by technology

When the Mach number is greater than 7 and less than or equal to 10, the air flow of the wind tunnel is relatively small, the pressure level is high, and the heating temperature is high. During use, it is prone to failure due to the influence of high temperature and high pressure.

If a heater is used to meet both the large flow rate and high temperature and high pressure capabilities to achieve the operating range of Mach number greater than 4 and less than or equal to 10, the design of the heater is difficult, the cost is high, and the heating time during the high Mach number test is greatly reduced. Extended, prone to failure, difficult to repair, and difficult to achieve test state switching

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