Simple coaxial calorimeter

Abstract

The inveiton provides a coaxial calorimeter. A shell of the coaxial calorimeter is made of an oxygen-free copper material with high thermal conductivity, a constantan wire with an insulating layer isarranged in a central lead hole of the oxygen-free copper shell, the front end of the constantan wire is riveted near the heated end face of the shell through an inclined hole to form a copper-constantan thermocouple node, and the other copper wire serves as a thermocouple lead to be connected to the oxygen-free copper shell. The coaxial calorimeter has the advantages of being simple in structure,short in response time, resistant to high-temperature gas scouring, small in outer diameter, easy to match with the surface of a model and the like, and a hot contact can be repaired again.

Description

technical field [0001] The invention relates to a coaxial calorimeter, which belongs to a high heat flux measuring device. Background technique [0002] With the development of modern aircraft, the structure and performance of the thermal protection system of the aircraft are closely related to the measurement accuracy of the heat flux density in the ground test. The current domestic research and development of heat flux sensors are far from meeting the requirements of aircraft development. For high heat flow calorimeters, such as steady-state calorimeters and scanning zero-point calorimeters, it is difficult for steady-state calorimeters to withstand this harsh thermal environment for a long time without being burned out, and rely on rapid response to achieve The long-life zero-point calorimeter has high processing requirements, and is welded by high-temperature vacuum feeding, and the solder is easy to form parasitic heat capacity. [0003] The coaxial calorimeter is a se...

AI Technical Summary

Problems solved by technology

[0002] With the development of modern aircraft, the structure and performance of the thermal protection system of the aircraft are closely related to the measurement accuracy of the heat flux density in the ground test. At present, the research and development of the domestic heat flux sensor is far from meeting the requirements of the development of the aircraft.

For high heat flow calorimeters, such as steady-state calorimeters and scanning zero-point calorimeters, it is difficult for steady-state calorimeters to withstand this harsh thermal environment for a long time without being burned out, and rely on rapid response to achieve The long-life zero-point calorimeter has high processing requirements, and is welded by high-temperature vacuum feeding, and the solder is easy to form parasitic heat capacity

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