A thermal protection structure test fixture

Abstract

The application belongs to the field of structural performance testing, in particular to a heat protection structure testing jig. It includes: a fixture platform (1), a deflector (2) and a cover plate (3). The fixture platform (1) is provided with a first groove (11) and a second groove (12) communicating with each other, and the depth of the first groove (11) is greater than that of the second groove (12) depth, and one end of the first groove (11) is provided with a liquid inlet hole (13); the deflector (2) is installed in the second groove (12), and the deflector (2) is provided with a third groove (21), and one end of the third groove (21) communicates with the first groove (11); the cover plate (3) is installed on the fixture platform ( 1), and a liquid containing cavity is formed between the first groove (11). The heat protection structure test fixture of the present application can solve the heat-fluid coupling heat protection structure test problem existing in the prior art, and has a simple structure and high reliability.

Description

technical field [0001] The application belongs to the field of structural performance testing, in particular to a heat protection structure testing jig. Background technique [0002] Severe aerodynamic heating will pose a severe threat to the airframe structure and systems of high Mach number aircraft. The success of the development of thermal protection structures directly determines the success or failure of high Mach number aircraft. [0003] At present, the thermal protection structures used in engineering mainly include ceramic cover type, metal honeycomb type, ceramic tile type, flexible felt type, etc. These structures are derived from the service environment of aerospace vehicles. As the design goal of heat protection effect, too much attention is paid to short-term high temperature and large heat flow protection and temperature shock, and factors such as structural life, oxidation resistance, and vibration resistance are not considered in conjunction with thermal pr...

AI Technical Summary

Problems solved by technology

[0003] At present, the thermal protection structures used in engineering mainly include ceramic cover type, metal honeycomb type, ceramic tile type, flexible felt type, etc. These structures are derived from the service environment of aerospace vehicles. As the design goal of heat protection effect, too much attention is paid to short-term high temperature and large heat flow protection and temperature shock, and factors such as structural life, oxidation resistance, and vibration resistance are not considered in conjunction with thermal protection effects, resulting in relatively poor mechanical properties of these thermal protection structures. Poor, poor environmental adaptability, serious space occupation, difficult maintenance, low structural life, very limited service range

[0004] Compared with aerospace thermal protection structures, the service temperature and heat flux density of aviation thermal protection structures are lower, but the additional service conditions such as load bearing, vibration, and oxidation make the comprehensive service environment of aviation thermal protection structures more severe, and the aerospace thermal protection structures are directly used. Technology cannot solve the environmental requirements for thermal protection of aviation high Mach number aircraft

The semi-active thermal protection structure based on the metal structure is an effective technical solution, but this kind of structural configuration is complex, and the fluid is coupled with the thermal environment, which makes the test verification and assessment difficult. It is extremely difficult to design a special test assessment fixture to achieve heat-fluid coupling assessment. urgent

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