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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 25 — Sep. 1, 2010
  • pp: 4728–4734

Fourier-transform absorption spectroscopy in reciprocating engines

Keith D. Rein and Scott T. Sanders  »View Author Affiliations


Applied Optics, Vol. 49, Issue 25, pp. 4728-4734 (2010)
http://dx.doi.org/10.1364/AO.49.004728


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Abstract

We have adapted our in-cylinder Fourier-transform spectroscopy technique to measure absorption spectra in a reciprocating engine. Previously, we had used the technique for emission spectroscopy; the upgrade to absorption spectroscopy mode is important because it allows for more quantitative anal ysis of gas properties than is possible with emission spectroscopy. Here, we discuss fuel, H 2 O , and CO 2 spectra measured in an engine using a spark-plug-based probe for optical access and use the water portion of the spectra to determine in-cylinder gas temperature. The temperature results show that heat transfer effects can significantly bias thermometry when fiber-coupled engine probes are used.

© 2010 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.6780) Instrumentation, measurement, and metrology : Temperature
(280.1740) Remote sensing and sensors : Combustion diagnostics
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: May 28, 2010
Revised Manuscript: July 28, 2010
Manuscript Accepted: July 29, 2010
Published: August 25, 2010

Citation
Keith D. Rein and Scott T. Sanders, "Fourier-transform absorption spectroscopy in reciprocating engines," Appl. Opt. 49, 4728-4734 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-25-4728

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