Geometric characteristics measurement technique for film cooling holes based on spectral interferometry system

Hongyu Shen; Min Xia; Wenping Guo; Kecheng Yang

doi:10.1117/12.2688643

27 November 2023 Geometric characteristics measurement technique for film cooling holes based on spectral interferometry system

Hongyu Shen, Min Xia, Wenping Guo, Kecheng Yang

Author Affiliations +

Proceedings Volume 12769, Optical Metrology and Inspection for Industrial Applications X; 127690W (2023) https://doi.org/10.1117/12.2688643
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

The utilization of film cooling holes design can ensure rapid cooling of the aero engines turbine to achieve effective blade protection. To achieve optimal cooling, geometric features such as aperture, hole spacing and cone angle of the film cooling holes are necessary to be measured. We propose a spectral interferometry system method, which can measure aperture and depth of the holes and surface topography of the engine blade, and calculate the geometric characteristics of the holes by processing this information by 3d point cloud. Comparing the measurement result of our system with the measurement result of film cooling holes slice, it can be obtained that the error of aperture and spacing of holes is about 20μm, the repeated measurement accuracy is 0.8μm, and the cone angle error is about 2°.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Hongyu Shen, Min Xia, Wenping Guo, and Kecheng Yang "Geometric characteristics measurement technique for film cooling holes based on spectral interferometry system", Proc. SPIE 12769, Optical Metrology and Inspection for Industrial Applications X, 127690W (27 November 2023); https://doi.org/10.1117/12.2688643

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