Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Ceramic wall surface composite plug type heat flux sensor applicable to high-enthalpy, medium and low heat flux environment

A technology of heat flow sensor and composite plug, applied in calorimeters, instruments, measuring heat, etc., can solve the problems of slow thermal response, preparation of ceramic coatings, small thermal conductivity, etc., to achieve ease of thermal diffusion, small linear expansion coefficient, small difference effect

Active Publication Date: 2017-05-24
BEIJING LINJIN SPACE AIRCRAFT SYST ENG INST +1
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ceramic wall surface composite plug type heat flux sensor applicable to high-enthalpy, medium and low heat flux environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0021] In order to solve the problem that due to the large difference in catalytic coefficient between the plug sensor used for heat flow testing and the material wall surface of the test piece, and the discrepancy between the measured heat flow and the actual heat flow on the surface of the test piece, the most direct method is to develop a heat flow sensor that is completely consistent with the catalytic characteristics of the surface of the test piece, that is, The same sheet or coating as the test material is prepared on the surface of the copper plug, but in the actual development process, two problems will be encountered: First, the ceramic coating prepared on the surface of the ceramic matrix composite material or heat-resistant material is in the development process. It usually needs to undergo high temperature treatment or high temperatu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01K17/06
CPCG01K17/06
Inventor 徐晓亮曹占伟王振峰侯宜朋黄建栋闵昌万付斌景丽颜维旭任晶志周启超纪兵兵崔占中白光辉
Owner BEIJING LINJIN SPACE AIRCRAFT SYST ENG INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products