Three‐dimensional deformation measurement of aero‐engine high‐speed rotating blade surface based on stroboscopic structure digital image correlation method

Wu, Huilin; Sun, Chuanzhi; Yu, Zhenjiang; Mei, Yingjie; Wang, Xiaoming; Ma, Hongyuan; Zou, Limin; Liu, Yongmeng; Tan, Jiubin

doi:10.1002/stc.3117

Cited by 3 publications

(3 citation statements)

References 49 publications

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“…They introduced a calibration method based on the features of the blade reference surface, eliminating pose errors in the system without the need for additional calibration objects. The area-source method typically employs digital image correlation techniques [13,14] or structured light technology. For example, Huang et al [15] and others proposed an efficient and highly accurate full-section blade measurement technique based on multi-view structured light three-dimensional measurement.…”

Section: Introductionmentioning

confidence: 99%

Measuring the profile of aircraft engine blades using spectral confocal sensors

Chen,

Xue,

Sun

et al. 2024

Meas. Sci. Technol.

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The geometric parameters of aircraft engine blades need to be precisely measured to ensure the quality of the blades for the normal operation of aircraft engines. This study aims to address the challenges of existing measurement systems in balancing efficiency, accuracy, and completeness. Additionally, it aims to enhance the accuracy and robustness of the algorithm for extracting blade profile characteristic parameters. In this paper, a spectral confocal sensor is employed to establish a blade profile measurement system. The design includes a probe sampling strategy, and a standard ball is used to calibrate the sensor probe's light emission direction and the precise rotation center of the turntable. The paper proposes the use of methods such as partition search algorithm, binary search, and curvature segmentation to process point cloud data of blade body and tenon. We have conducted experimental measurements on the blades of an aircraft engine. The acquired three-dimensional point cloud data of multiple sets of blade cross-sections and dovetail sections were processed. After calculation, the maximum measurement errors for chord length, maximum blade thickness, tenon width, bottom height, top angle, and bottom angle are -0.0036mm, -0.00721mm, -0.0102mm, -0.00928mm, 0.0086 °, and -0.0058 °, respectively. This process validates the effectiveness of the proposed method and has high measurement accuracy. Compared with the CMM method, this method is more accurate in measuring small pits and large curvature micro surfaces, with higher measurement integrity and higher measurement efficiency.

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Section: Introductionmentioning

confidence: 99%

Measuring the profile of aircraft engine blades using spectral confocal sensors

Chen,

Xue,

Sun

et al. 2024

Meas. Sci. Technol.

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“…However, the turbine blade will bear aerodynamic, centrifugal, and other loads when the engine rotates at high speed. 4 Fatigue cracks often nucleate from the FCHs, which seriously affects the service safety.…”

Section: Introductionmentioning

confidence: 99%

“…The cooling channels at the trailing edge of turbine air‐cooled blade usually adopt shaped FCHs to improve the heat transfer efficiency, as shown in Figure 1C. However, the turbine blade will bear aerodynamic, centrifugal, and other loads when the engine rotates at high speed 4 . Fatigue cracks often nucleate from the FCHs, which seriously affects the service safety.…”

Section: Introductionmentioning

confidence: 99%

Research on low‐cycle fatigue behavior of Ni‐based single crystal superalloy with shaped film cooling holes at high temperature

Li,

Wen,

Meng

et al. 2023

Fatigue Fract Eng Mat Struct

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Film cooling holes (FCHs) geometric structure significantly affects low‐cycle fatigue (LCF) of the single crystal turbine blade. This study investigates the LCF behavior of Ni‐based single crystal plate specimens with two different structure FCHs, including elliptical and fan‐shaped FCHs, by high temperature fatigue tests and crystal plasticity simulation. The results show that the LCF life of the fan‐shaped FCHs is shorter than those of the elliptical FCHs. The fracture characteristics and microstructure evolution of different structure FCHs are dissimilar. Oxidation affects the fatigue crack nucleation process at the FCH edge. The resolved shear stress (RSS) around fan‐shaped FCHs is greater than elliptical FCHs under one cyclic stress, and the area with larger RSS is consistent with fatigue crack nucleation position. The early LCF failure is mainly attributed to the high temperature oxidation of the local slip deformation induced by RSS concentration around the FCHs.

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Stress-strain analysis of steel S235JRH pipe ring tensile specimens using 3D optical methods

Travica,

Mitrović,

Petrović

et al. 2023

Measurement and Control

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Various pipe production procedures, including the construction of seamless pipes using a shaft with the conical tip in the oil industry, require data on the circumferential strain and stress state of the pipe. A method for measuring the displacement, strain and stress behavior of a pipe ring tensile specimen (PRTS) in the hoop direction is what this study’s goal was to develop, as there was a lack of a standardized testing process. For the study, five single S235JRH steel PRTS were tested. In the paper, it is presented how to test S235JRH steel PRTS using a Digital Image Correlation method, Thermal Imaging camera, and 3D scanner. A specially designed steel tool with two D blocks was developed for testing steel PRTS. The strain progression was documented using the 3D Digital Image Correlation method. Using a thermographic camera, an attempt was made to analyze the change in the temperature field of the PRTS during the test. All the specimens were subjected to 3D scanning to verify the cross-sectional geometry of the PRTS after a fracture. Fractures of all Single PRTS occurred in the break zone and almost identical places. The deviation value for the Experimental Ultimate strength value (true stress value) higher than the theoretical Ultimate strength value. Deviation value for the Experimental 0.2% Offset Yield Strength value is higher than the theoretical value. The results of the analysis of cross-sectional dimensions revealed a more significant variation in the thickness of the PRTS compared to its width. A potential area of literature review is the application of a high-resolution thermal imaging camera and the analysis of the stress state of the material using it.

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Three‐dimensional deformation measurement of aero‐engine high‐speed rotating blade surface based on stroboscopic structure digital image correlation method

Cited by 3 publications

References 49 publications

Measuring the profile of aircraft engine blades using spectral confocal sensors

Measuring the profile of aircraft engine blades using spectral confocal sensors

Research on low‐cycle fatigue behavior of Ni‐based single crystal superalloy with shaped film cooling holes at high temperature

Stress-strain analysis of steel S235JRH pipe ring tensile specimens using 3D optical methods

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