Simple coaxial calorimeter

A calorimeter and coaxial technology, applied in the field of high heat flux measurement devices, can solve the problems that the steady-state calorimeter is difficult to withstand for a long time, the processing requirements are high, and the development of heat flux sensors cannot meet the requirements of aircraft development.

Pending Publication Date: 2020-06-12
CHINA ACAD OF AEROSPACE AERODYNAMICS
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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 a...

Method used

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  • Simple coaxial calorimeter
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Embodiment Construction

[0014] Such as figure 2 As shown, a novel coaxial calorimeter of the present invention mainly includes a coaxial calorimeter housing 1, a constantan wire 2 with an insulating layer and a copper wire 3. The heated end surface of the housing 1 has oblique holes and The straight holes at the center line are connected to each other for constantan wire 2 to pass through; the coaxial calorimeter shell 1 is made of oxygen-free copper material with high thermal conductivity, and the constantan wire 2 with an insulating layer is placed through the straight hole and The inclined hole is riveted on the heated end surface of the coaxial calorimeter shell 1; the copper wire 3 is riveted on the oxygen-free copper shell as a thermocouple lead to form a copper-constantan temperature measurement node, and the temperature data of the shell is obtained through a high-speed measurement and acquisition system. Combined with the relevant formulas of heat transfer, the heat flux value of the coaxia...

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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...

Claims

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Application Information

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IPC IPC(8): G01K17/00
CPCG01K17/00
Inventor 张骞程奂哲杨忠凯林国胜朱旭
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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