Two-dimensional particle-image velocimetry with electro-optical image shifting in an internal combustion engine

David L. Reuss

doi:10.1117/12.163726

2 December 1993 Two-dimensional particle image velocimetry with electro-optical image shifting in an internal combustion engine

David L. Reuss

Author Affiliations +

Proceedings Volume 2005, Optical Diagnostics in Fluid and Thermal Flow; (1993) https://doi.org/10.1117/12.163726
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Particle Image Velocimetry (PIV), has been used to make 2D velocity measurements over the cylinder cross section of a reciprocating internal-combustion engine. Electrooptical image shifting has been demonstrated previously as a viable means to remove the directional ambiguity inherent in PIV. A two-laser system was developed to produce two, colinear, cross- polarized laser beams, which are required for the image shifting technique. Particle scattering resulted in some depolarization of the laser light. This was shown to result in erroneous vectors and a zero bias at low velocities. Techniques to minimize the depolarization problems are discussed. It is demonstrated that the uncertainty in this method is small enough to permit resolving in-cylinder engine turbulence.

Citation Download Citation

David L. Reuss "Two-dimensional particle image velocimetry with electro-optical image shifting in an internal combustion engine", Proc. SPIE 2005, Optical Diagnostics in Fluid and Thermal Flow, (2 December 1993); https://doi.org/10.1117/12.163726

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