火箭推进2018，Vol.44Issue(6)：81-85,5.
短型热电偶导热误差影响因素数值仿真分析
Numerical simulation and analysis of thermal conductivity error for short type thermocouple
摘要
Abstract
In the research of aerospace engine technology, accurate measurement of airflow temperature in high temperature and high speed environment is usually required to evaluate the performance of the engine. In addition, depth of the thermocouples insertion at high temperature airflow is very short due to the restriction of geometrical space and sensor strength, which causes large thermal conductivity error and affects the judgment of engine working characteristics. In this paper, research on thermal conductivity error of short type thermocouple is carried out. A simulation model of thermal conductivity error for short thermocouple is established. And the accuracy of the simulation model is verified further. Through numerical simulation, the influence of thermocouple insertion depth, Mach number of incoming flow, total temperature of incoming flow and substrate temperature on the correction coefficient of heat conduction error was studied. The response surface model of thermal conductivity error correction coefficient was established. The simulation results can provide an idea for the suppression of thermal conductivity error of short thermocouple and provide a support for the measured data correction in the application process of thermocouple.关键词
短型热电偶温度传感器/数值仿真/导热误差修正Key words
short type thermocouple/numerical simulation/thermal conductivity error correction分类
航空航天引用本文复制引用
莫建伟,荆卓寅,李彤,王勇,李龙飞..短型热电偶导热误差影响因素数值仿真分析[J].火箭推进,2018,44(6):81-85,5.基金项目
国防科工局技术基础科研项目(JSJC2013203A001) （JSJC2013203A001）
