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3-D measurement of 2-D jet by 3-D 3-C SPIV

Abstract

The stereo PIV, commonly known as the SPIV, is capable of measuring all the three velocity components in a two-dimensional measurement plane and thus classified as 2-D 3-C PIV. Even though the SPIV utilizes a set of two cameras, the positions of the measurement points are assumed to be located in the central plane of the illuminated volume, which is usually the zone of laser light sheet. This assumption makes the SPIV versatile and its calibration procedure very handy. But, if the three-dimensional orientation of the cameras can be calibrated precisely, the three-dimensional position of the particles that may be distributed in the depth of the illuminated zone can be calculated. The authors of this study have proposed a new algorithm that enables the fully three-dimensional measurement by SPIV and it can be classified as 3-D 3-C SPIV. Presently, the three-dimensional turbulent measurement of a plane jet has been carried out with the use of presently proposed 3-D 3-C SPIV and the transverse distributions of the turbulence statistics have been obtained in the depth direction of 3-D 3-C SPIV. The results are compared with those by standard PIV, i.e., 2-D 2-C PIV, and thus, the accuracy and the applicability of 3-D 3-C SPIV have been evaluated.

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Acknowledgements

A part of this work has been supported by Mr. Norio Yuzawa, Mr. Shunya Buseki and Mr. Daiki Kono. All supports are greatly acknowledged.

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Correspondence to Nao Ninomiya.

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Ninomiya, N., Tanaka, Y., Sotome, S. et al. 3-D measurement of 2-D jet by 3-D 3-C SPIV. J Vis 22, 305–312 (2019). https://doi.org/10.1007/s12650-018-0529-8

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Keywords

  • 3-D measurement
  • Stereo PIV
  • Scheimpflüg condition
  • Camera calibration
  • 2-D jet
  • Turbulence statistics