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Proceedings Paper

Two-dimensional particle-image velocimetry with electro-optical image shifting in an internal combustion engine
Author(s): David L. Reuss
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Paper 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.

Paper Details

Date Published: 2 December 1993
PDF: 12 pages
Proc. SPIE 2005, Optical Diagnostics in Fluid and Thermal Flow, (2 December 1993); doi: 10.1117/12.163726
Show Author Affiliations
David L. Reuss, General Motors Research Labs. (United States)

Published in SPIE Proceedings Vol. 2005:
Optical Diagnostics in Fluid and Thermal Flow
Soyoung Stephen Cha; James D. Trolinger, Editor(s)

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