1000~1900 K范围内TDLAS测高温标定方法设计及实验验证

针对航空发动机对燃烧尾焰温度测试的需求,开展基于吸收光谱原理的可调谐半导体激光器吸收光谱(TDLAS)测温系统研究。在实验室环境中采用辐射升温法创造高温气体恒温区,完成温度标定系统及标定流程设计。根据TDLAS测温系统1000~1900 K温度范围的温度标定,对比分析各个温度点标定过程中信噪比的变化过程,证实了标定方法的可行性。对标定过程中信噪比恶化提出修正措施。

Design and Experiment Verification of TDLAS High Temperature Calibration Method at 1000~1900 K Temperature Range

In order to meet the requirements of aero-engines for the temperature measurement of combustion tail flames,a tunable diode laser absorption spectroscopy (TDLAS) temperature measurement system based on the principle of absorption spectroscopy is developed.In the laboratory environment,the radiant heating method was used to create a constant gas high temperature zone,and the designs of the temperature calibration system and calibration process were completed.According to the temperature calibration of the TDLAS temperature measurement system in the temperature range of 1000~1900 K,the variation process of the signal-to-noise ratio at each temperature point during the calibration process was compared and analyzed to verify the feasibility of the calibration method.With further attempts,corrective measures were taken for the deterioration of the signal-to-noise ratio during the calibration process.