Ceramic wall composite plug heat flux sensor for high enthalpy, medium and low heat flux environments

Abstract

The invention provides a ceramic wall surface composite plug type heat flux sensor applicable to high-enthalpy, medium and low heat flux environments. The ceramic wall surface composite plug type heat flux sensor relates to the field of ceramic wall surface heat flux sensor design. The heat flux sensor comprises a graphene column, a rigid ceramic thermal insulation sleeve, a red copper column, a thermocouple and a ceramic coating, wherein one axial end of the graphene column is fixedly connected with the red copper column, and another axial end of the graphene column is coated with the ceramic coating; the outer side wall of the graphene column and the axial end surface (away from the graphene column) of the red copper column are coated with the rigid ceramic thermal insulation sleeve; and the end surface of the red copper column is provided with the thermocouple. The ceramic wall surface composite plug type heat flux sensor solves the problem that the ceramic coating cannot be prepared on the surface of the red copper column directly, alleviates the thermal diffusion in the plane direction, effectively avoids the problems of low thermal conductivity coefficients and slow thermal response of the ceramic material, and provides a more precise calorimetric sensor for hypersonic-speed aircraft ground thermal protection texts.

Description

technical field [0001] The invention relates to the design field of a ceramic wall heat flow sensor, in particular to a ceramic wall composite plug-type heat flow sensor suitable for high-enthalpy, medium-low heat flow environments. Background technique [0002] When the aircraft flies at hypersonic speed, due to the compression of the air ahead and the friction with the surrounding air, most of the kinetic energy of the aircraft will be dissipated in the atmosphere in the form of shock waves and wake vortices, and the rest of the kinetic energy will be It is converted into heat energy, causing the temperature of the air around it to rise sharply, and transfer heat to the surface of the spacecraft in two forms of convection and radiation, that is, "aerodynamic heating". In order to assess whether the anti-insulation material selected by the aircraft can meet the design requirements of the anti-insulation design under aerodynamic heating conditions, it is usually necessary to...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, provide a ceramic wall composite plug-type heat flow sensor suitable for high enthalpy, medium and low heat flow environments, solve the problem that ceramic coatings cannot be directly prepared on the surface of copper columns, and alleviate the problem of plane direction. Thermal diffusion effectively avoids the problems of small thermal conductivity and slow thermal response of ceramic materials, and provides a more accurate thermal sensor for ground heat resistance tests of hypersonic aircraft

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