High-temperature and low-pressure oxygen dissociation environment test device for heat protection material

Abstract

The invention relates to a high-temperature and low-pressure oxygen dissociation environment test device for a heat protection material. The device comprises a radio frequency power supply, a matching box, an air exhaust path, an oxygen dissociation environment generation subsystem, a laser heating subsystem and a pressure, cooling and control auxiliary subsystem, wherein the radio frequency power supply outputs power to a flat plate coil in the matching box; the flat plate coil discharges to working gas entering an environment cabin through an air feeding flange, so that an oxygen dissociation environment is formed; a test sample is arranged on a water cooling bracket, so that the high-temperature and low-pressure oxygen dissociation environment test device capable of independently adjusting pressure, temperature and dissociation degree is realized, and the oxygen dissociation environments of a high-supersonic-velocity air vehicle in different states can be simulated; therefore, the oxidization behavior of an ultra-high-temperature heat protection material in the oxygen dissociation environment can be researched. The high-temperature and low-pressure oxygen dissociation environment test device has the advantages of adjustability in parameters such as temperature, pressure and the dissociation degree, simplicity in operation, low cost and high reliability.

Description

technical field [0001] The invention relates to a thermal protection material high temperature and low pressure dissociated oxygen environment test device. Background technique [0002] Hypersonic vehicles are different from previous reentry vehicles. The new generation of vehicles represented by transatmospheric vehicles, gliding vehicles, jumping missiles, and hypersonic cruise missiles will fly for a long time within the altitude range of 40km to 80km. The service environment creates a strong shock wave on the head of the aircraft, and the air will be heated to a very high temperature by the shock wave, resulting in the vibrational excitation, dissociation, and even ionization of air molecules, making the airflow around the hypersonic aircraft in a plasma environment, and causing the body Surface materials undergo complex physical and chemical reactions. Aerodynamic physical effects such as chemical non-equilibrium flow field state and high-temperature gas effect cause c...

AI Technical Summary

Problems solved by technology

At this stage, the research methods in this field are relatively single, only flight test and ground simulation test. However, the high cost and low reliability of flight test seriously restrict the development of a large number of studies. There are problems such as high operating costs, state parameters that cannot be changed independently, small adjustable range, and many interference factors that require flow field reconstruction. It is difficult to carry out large-scale research on the material response of thermal protection materials in a dissociated oxygen environment.

Images