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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 26 — Dec. 25, 2006
  • pp: 12994–13000

Time-resolved measurement of the local equivalence ratio in a gaseous propane injection process using laser-induced gratings

Thomas Seeger, Johannes Kiefer, Markus C. Weikl, Alfred Leipertz, and Dimitrii N. Kozlov  »View Author Affiliations

Optics Express, Vol. 14, Issue 26, pp. 12994-13000 (2006)

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For the first time laser-induced gratings (LIGs) have been used for the investigation of a non-stationary pulse-repetitive injection process of gaseous propane, C3H8, into air. By recording and evaluating single-shot LIG signals it was possible to determine, on a cycle-averaged basis, the temporal evolution of the local (within a probe volume 300 µm in diameter and 10 mm in length) equivalence ratio and by this the fuel-air ratio. Two different data treatment strategies, subject to C3H8 concentration range, were first tested at stationary conditions and then used to evaluate the LIG signals obtained during the injection process. The relative standard deviation of single-shot measurements were estimated to be 0.14 and 0.32 at 0.8% and 10% of propane concentration, respectively.

© 2006 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(190.1900) Nonlinear optics : Diagnostic applications of nonlinear optics

ToC Category:
Nonlinear Optics

Original Manuscript: September 27, 2006
Revised Manuscript: December 6, 2006
Manuscript Accepted: December 7, 2006
Published: December 22, 2006

Thomas Seeger, Johannes Kiefer, Markus C. Weikl, Alfred Leipertz, and Dimitrii N. Kozlov, "Time-resolved measurement of the local equivalence ratio in a gaseous propane injection process using laser-induced gratings," Opt. Express 14, 12994-13000 (2006)

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