&lt;title&gt;Aircraft engine blade cooling holes detection and classification from infrared images&lt;/title&gt;

Rosemau, Robert D.; Nawaz, Sal; Niu, Aiqun; Wee, William G.

doi:10.1117/12.339875

Cited by 2 publications

(2 citation statements)

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“…The detailed working mechanism of this method is presented in Figure 15. Rosemau [62] developed a measurement system for cooling holes based on infrared imaging. This system cyclically heats and cools the blade, capturing infrared images of the thermal airflow effusing from the cooling holes.…”

Section: Infrared Imaging Technologymentioning

confidence: 99%

Advances in Aeroengine Cooling Hole Measurement: A Comprehensive Review

Yan,

Shi,

et al. 2024

Sensors

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Film cooling technology is of great significance to enhance the performance of aero-engines and extend service life. With the increasing requirements for film cooling efficiency, researchers and engineers have carried out a lot of work on the precision and digital measurement of cooling holes. Based on the above, this paper outlines the importance and principles of film cooling technology and reviews the evolution of cooling holes. Also, this paper details the traditional measurement methods of the cooling hole used in current engineering scenarios with their limitations and categorizes digital measurement methods into five main types, including probing measurement technology, optical measurement technology, infrared imaging technology, computer tomography (CT) scanning technology, and composite measurement technology. The five types of methods and integrated automated measurement platforms are also analyzed. Finally, through a generalize and analysis of cooling hole measurement methods, this paper points out technical challenges and future trends, providing a reference and guidance for forward researches.

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Section: Infrared Imaging Technologymentioning

confidence: 99%

Advances in Aeroengine Cooling Hole Measurement: A Comprehensive Review

Yan,

Shi,

et al. 2024

Sensors

View full text Add to dashboard Cite

show abstract

“…The experimental results indicated that the resolution of the probing sensor is as small as 1 nm. Rosemau et al [13] designed an infrared ray (IR) imaging system controlled by a robot to inspect cooling holes. This IR camera obtains a sequence of images to analyze and evaluate the thermal cycle situation at the root of the blade.…”

Section: Introductionmentioning

confidence: 99%

A novel cooling hole inspection method for turbine blade using 3D reconstruction of stereo vision

Cheng¹,

Li²,

Jiang³

et al. 2021

Meas. Sci. Technol.

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Cooling holes (number 100 ∼ 200, diameter 0.3 ∼ 1.2 mm) are important heat dissipation structures of a turbine blade in aero-engine. Due to the small sizes and similar contours of cooling holes, it is difficult to extract and match their features by traditional stereo reconstruction methods. This paper proposes a novel cooling hole inspection method for turbine blades utilizing 3D reconstruction technique of stereo vision, which combines the stereo vision principle with the invariance of cross-ratio. The feature points of contours are extracted and matched by calculating two intersection points of circular contours and a line through the center points of adjacent cooling holes. Additionally, the 3D points corresponding to the feature points are reconstructed, by which, the diameters of cooling holes can be calculated successfully. Moreover, measurement experiments verify the effectiveness and accuracy of the proposed method. The experimental results show that the average errors of the standard circle ruler and tiny hole sample are within 0.05 mm, which satisfies the inspection requirement of cooling holes.

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<title>Aircraft engine blade cooling holes detection and classification from infrared images</title>

Cited by 2 publications

References 0 publications

Advances in Aeroengine Cooling Hole Measurement: A Comprehensive Review

Advances in Aeroengine Cooling Hole Measurement: A Comprehensive Review

A novel cooling hole inspection method for turbine blade using 3D reconstruction of stereo vision

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