GAO Ji-kun 1 , YAN Feng 1 , HE Xiao-mei 2 , DE Xiao-wei 1.Inspection of Turbine Blade Film Cooling Holes Based on Fiber OpticMulti-sensor Measurement Technique[J].航空发动机,2024,50(2):139-146
Inspection of Turbine Blade Film Cooling Holes Based on Fiber OpticMulti-sensor Measurement Technique
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Key Words:turbine blade  film cooling hole  geometrical feature parameter  fiber optic multi-sensor measurement technique  contact measurement  non-contact measurement  aeroengine
Author NameAffiliation
GAO Ji-kun 1 , YAN Feng 1 , HE Xiao-mei 2 , DE Xiao-wei 1 1. AECC Shenyang Engine Research InstituteShenyang 110015China 2. Changcheng Institute of Metrology and MeasurementBeijing 100095China 
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Abstract:In order to solve the problems of lacking effective inspection means and poor consistency of measurement results for aeroengine turbine blade film cooling hole geometrical feature parameters, an inspection system for turbine blade film cooling holes was designed and established based on fiber optic-based multi-sensor measurement technique. The measurement method of the film cooling holes using the system was proposed, and verified by measurement practices. The system is a multi-sensor measurement system with the ability of contact and non-contact measurement, spatial attitude positioning, and 3D projection, realizing measurement of film cooling holes over the entire turbine blade. A high-pressure turbine blade was selected for conducting the film cooling hole measurement by using the measurement system. Accurate geometrical feature parameters of the film cooling holes were calculated, including their diameters, axis angles, and position. The results show that through measurement uncertainty analysis and evaluation, uncertainties of the diameters and the positions are both less than 0.01mm, which fully meets the accuracy requirements of the measuring instrument derived from the design tolerances, and the system can be used for the inspection of the film cooling hole of the turbine blade.
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