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3D surface pressure measurement with single light-field camera and pressure-sensitive paint

  • Shengxian Shi
  • Shengming Xu
  • Zhou Zhao
  • Xiaofu Niu
  • Mark Kenneth Quinn
Research Article

Abstract

A novel technique that simultaneously measures three-dimensional model geometry, as well as surface pressure distribution, with single camera is demonstrated in this study. The technique takes the advantage of light-field photography which can capture three-dimensional information with single light-field camera, and combines it with the intensity-based pressure-sensitive paint method. The proposed single camera light-field three-dimensional pressure measurement technique (LF-3DPSP) utilises a similar hardware setup to the traditional two-dimensional pressure measurement technique, with exception that the wind-on, wind-off and model geometry images are captured via an in-house-constructed light-field camera. The proposed LF-3DPSP technique was validated with a Mach 5 flared cone model test. Results show that the technique is capable of measuring three-dimensional geometry with high accuracy for relatively large curvature models, and the pressure results compare well with the Schlieren tests, analytical calculations, and numerical simulations.

Notes

Acknowledgements

Financial support provided by National Natural Science Foundation of China (Grant no. 11472175, 11772197) and Shanghai Raising Star Program (Grant no. 15QA1402400) are gratefully acknowledged.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghaiChina
  2. 2.School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghaiChina
  3. 3.School of Mechanical, Aerospace and Civil EngineeringUniversity of ManchesterManchesterUK

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