Uncertainties of an Automated Optical 3D Geometry Measurement, Modeling, and Analysis Process for Mistuned Integrally Bladed Rotor Reverse Engineering

Kaszynski, Alex A.; Beck, Jeff; Brown, Jerram L.

doi:10.1115/1.4025000

Cited by 42 publications

(4 citation statements)

References 22 publications

(21 reference statements)

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“…There is an ongoing development [5][6][7][8] of methods to derive a Finite Element Models of axial bladed structures by scanning their surfaces. Here an equivalent approach is shown.…”

Section: Geometric Optical Measurementmentioning

confidence: 99%

Modelling and analysis of a high-speed turbine impeller concerning mistuning

2018

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As-manufactured impellers behave significantly different from nominal impellers. There are no identical blades due to geometric and material deviations. In this paper three model updating procedures are discussed with the objective to achieve realistic models of as-manufactured impellers. The techniques are applied to radial inﬂow turbine wheel of an exhaust gas turbocharger. The first approach creates a model through optical measurement and mesh morphing. The second approach is based on a contactless measurement of blade individual vibration responses. An iterative update process gains the corresponding mistuning pattern and thus the associated model. Third, a model is found by an optimisation, that identified a mistuning pattern, that fits modal characteristics, which are evaluated during experimental modal analysis at vacuum. In-depth analyses of these models are realised to determine advantages and drawbacks of the procedures.

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“…There is an ongoing development [5][6][7][8] of methods to derive a Finite Element Models of axial bladed structures by scanning their surfaces. Here an equivalent approach is shown.…”

Section: Geometric Optical Measurementmentioning

confidence: 99%

Modelling and analysis of a high-speed turbine impeller concerning mistuning

2018

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“…Holtzhausen 13 obtained a single blade model by means of reverse engineering and compared the results with the real blade. When reconstructing an integrally bladed rotor, Kaszynski 14 analyzed measurement errors involved. As a further application of reverse engineering approach, Gao 15 repaired turbine blades and aeronautical components and gained favorable results.…”

Section: Reconstruction Of the Eroded Impellermentioning

confidence: 99%

Virtual reconstruction and performance assessment of an eroded centrifugal pump impeller

Kang

Zhang

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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Emphasis is placed on the performance of a two-stage pump equipped with an eroded impeller. Non-contact reverse engineering technique is utilized to acquire the point data constituting the three-dimensional geometrical model of the eroded impeller. With computational fluid dynamics, both the operation performance of the pump and flow patterns adjacent to the eroded blade surface are obtained. For comparison, the corresponding undamaged impeller is investigated as well. Preferable fidelity of the approach of constructing geometrical model of the damaged impeller is substantiated. The mechanism underlying performance degradation of the pump with the eroded impeller is evidenced. Local flow patterns near the eroded area are featured by explicit irregularity. Furthermore, between the defective and the undamaged pumps, disparity in positions where cavitation occurs is negligible.

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“…What were typically used is optical based measurement techniques such as laser scanner and structured-light 3D scanner [6][7][8]. As such systems require multiple scanning or fringe pattern projections for 3D point measurement, they normally take at least 30mins to produce relatively sparse point cloud for one blade [9]. Aside from low measurement efficiency, the small curvature of leading-and trailing-edge as well as irregular film cooling holes that are critical for blade aerodynamic performance, are currently very difficult to be accurately measured with CMM, laser scanner and structured-light 3D scanner.…”

Section: Introductionmentioning

confidence: 99%

A novel light field imaging based 3D geometry measurement technique for turbomachinery blades

Ding

Li²,

et al. 2019

Meas. Sci. Technol.

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This paper presents a novel snapshot three-dimensional (3D) imaging technique for fast turbomachinery blade geometrical measurements. The proposed measurement system employs a microlens array based light-field camera to capture 3D blade geometry into one light-field image, from which 100 new perspective images can be generated and the blade 3D point cloud can be recovered through sophisticated light-field rendering algorithms. The measurement accuracy is determined to be approximately by measuring a series of standard gauge blocks. Performance of the proposed technique is compared against a coordinate-measuring machine (CMM) and laser scanner by measuring a turbine blade. It reveals that the single light-field camera 3D measurement system can produce data point in with an average measurement accuracy of , which is considerably more efficient than the current CMM and laser scanning techniques.

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Uncertainties of an Automated Optical 3D Geometry Measurement, Modeling, and Analysis Process for Mistuned Integrally Bladed Rotor Reverse Engineering

Cited by 42 publications

References 22 publications

Modelling and analysis of a high-speed turbine impeller concerning mistuning

Modelling and analysis of a high-speed turbine impeller concerning mistuning

Virtual reconstruction and performance assessment of an eroded centrifugal pump impeller

A novel light field imaging based 3D geometry measurement technique for turbomachinery blades

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