Surface high-temperature measurement device for nonmetallic heat resistant material plane test piece of hypersonic speed aircraft

Abstract

The invention discloses a surface high-temperature measurement device for a nonmetallic heat resistant material plane test piece of a hypersonic speed aircraft. The device comprises a high-temperature ceramic framework, a temperature measurement thermocouple, a nonmetallic heat resistant material flat test piece, a silicon molybdenum infrared radiation heating tube and a computer. The high-temperature ceramic framework is provided with a circular hole; the temperature measurement thermocouple sleeved with a ceramic insulating sleeve is inserted into the circular hole of the high-temperature ceramic framework; and the front part of the temperature measurement thermocouple is bent into an upward arch; the nonmetallic heat resistant material flat test piece is pressed on the high-temperatureceramic framework by means of self weight to press the forefront of the temperature measurement thermocouple to form a ball-shaped temperature sensing part by welding. Due to interaction between the downward pressure of the nonmetallic heat resistant material flat test piece and the front arch upward elasticity of the temperature measurement thermocouple and adoption of double technology measuresof applying pre-deformation and increasing pre-stress, tight contact of the nonmetallic heat resistant material flat test piece and the temperature sensing part of the front end of the thermocouple under the high-temperature environment of between 1,000 and 1,400 DEG C is ensured, so that the surface high-temperature test result of the nonmetallic heat resistant material plane test piece of the hypersonic speed aircraft such as a missile, a space shuttle and the like is accurate and reliable.

Description

technical field [0001] The invention relates to a high-temperature measuring device for the surface of a non-metallic heat-proof material plane test piece of a hypersonic aircraft, especially for the high-temperature test environment of non-metallic plane light-weight heat-insulating materials used in simulating missiles, space shuttles and other hypersonic aircraft. Real-time measurement and recording of high temperature dynamic changes on the surface of thermal insulation materials up to 1000°C-1400°C. Background technique [0002] With the development of aerospace technology in the world, the design speed of long-range maneuvering aircraft is greatly increasing. At present, developed countries such as the United States, Russia, and the European Union are competing to develop hypersonic aircraft. my country is also working hard to carry out research on a new generation of hypersonic long-range maneuvering aircraft. The National Natural Science Foundation of China project g...

AI Technical Summary

Problems solved by technology

[0006] In addition, due to thermal ablation and thermal damage on the surface of the test piece in a high-temperature environment greater than 1000 ° C, it is generally not possible to repeat multiple high-temperature tests on the same test piece, and heat-resistant test pieces for high-speed aircraft are very expensive, such as The heat-proof tiles of the US space shuttle Columbia cost more than 50,000 US dollars per piece, so the test data obtained from each test are extremely valuable

Images