Abstract.
We report the first application of degenerate four-wave mixing (DFWM) to combustion diagnostics in a methane-fuelled internal combustion research engine. Combustion-generated NO in the spark-ignited engine was detected using scanning narrowband DFWM in a modified forward folded BOXCARS geometry. The resulting spectra of the X2Π-A2Σ+(0,0) band at 226 nm display an excellent signal-to-noise ratio. Extension of the technique to different engine operating conditions and to time-resolved multiplex DFWM is discussed.
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Received: 3 May 2001 / Revised version: 1 October 2001 / Published online: 29 November 2001
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Grant, A., Ewart, P. & Stone, C. Detection of NO in a spark-ignition research engine using degenerate four-wave mixing. Appl Phys B 74, 105–110 (2002). https://doi.org/10.1007/s003400100740
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DOI: https://doi.org/10.1007/s003400100740