Errors in Radiation Temperature Measurement Methods for Aero-Engine Turbine Blades: A Review

In recent years, radiation temperature measurement technology has garnered significant attention for measuring the temperature of turbine blades in aero-engines, owing to its wide measurement range, high precision, and long operational lifespan. However, operating within high-temperature and high-pressure environments, aero-engines face challenges leading to temperature measurement errors, including the reflected radiation from hot-end components, inaccuracies in measuring target surface emissivity, the absorption and emission of radiation by combustion gases, and contamination of optical lenses. During radiation temperature measurement, the accuracy of temperature measurements for turbine blades is significantly compromised. Therefore, it is crucial to investigate and correct these errors encountered to improve the accuracy of turbine blade temperature measurement. This article reviews research on the errors encountered in radiation temperature measurements of turbine blades, detailing their sources and corrective measures. Additionally, it provides a prospective outlook on the future direction of technological advancements in this field.