Measuring device for high surface temperature of cylindrical nonmetallic housing of high-speed aircraft

Abstract

A measuring device for high surface temperature of a cylindrical nonmetallic housing of a high-speed aircraft comprises a temperature measuring thermocouple, high-temperature resistance ceramic tubes, metal guide sleeves, pressure springs, round shell-shaped nonmetallic missile body, a ring-shaped quartz lamp heating array, a thermal shield and a computer, wherein the front end of the temperature measuring thermocouple takes the shape of a ball through spot welding; the pressure springs on the temperature measuring thermocouple are utilized to allow the front-end temperature sensitive part of the temperature measuring thermocouple to be in close contact with the surface of the round shell-shaped nonmetallic missile body during a test process; and an output signal of the temperature measuring thermocouple calculates out the temperature variation of the surface of the round shell-shaped nonmetallic missile body. According to the measuring device, the inaccurate measuring caused by degumming of a bonding layer and the loose contact is avoided, and the accurate and reliable temperature measuring result of a nonmetallic missile structure high-temperature test is ensured.

Description

technical field [0001] The invention relates to a high-temperature measuring device for the surface of a non-metallic cylindrical shell of a high-speed aircraft, especially for high-speed flight tests of high-speed aircraft such as high-speed missiles on the ground. The dynamic high-temperature change of the surface of the metal shell-shaped projectile is tested. Background technique [0002] When high-speed aircraft such as missiles fly rapidly, the dynamic change of the temperature of the surface of the missile body and the heat shield is a key parameter to study whether the material of the missile body can resist the high-temperature thermal shock during high-speed flight and to evaluate the thermal performance of the missile body. In the ground test Measuring and recording the dynamic change process of missile surface temperature in extreme thermal environment has extremely important practical significance for the thermal protection and safety design of missile body. ...

AI Technical Summary

Problems solved by technology

In addition, the thermal expansion coefficients of the temperature sensor made of metal materials and the cylindrical missile shell structure of non-metallic materials are very different. Causes the bonded thermocouple to debond and separate from the non-metallic cylindrical missile shell structure, resulting in inaccurate measurement of the surface temperature of the missile shell

The structure of high-speed missiles is very expensive, and high-temperature tests will cause serious thermal ablation, deformation, and high-temperature damage. Repeated high-temperature tests cannot be performed on the same missile structure, and the test data obtained from each test are extremely valuable

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