Abstract
A tracer-based planar laser-induced fluorescence (TB-PLIF) imaging diagnostic using 3-pentanone has been optimized for use in IC engines. The diagnostic utilizes dual-wavelength excitation of 3-pentanone in the ultraviolet to make simultaneous measurements of exhaust gas residual mole fraction and temperature. A merit function based optimization of the diagnostic precision was performed which allowed for selection of optimal excitation wavelengths for the conditions of interest. Optimized system performance was validated in a motored optical engine over a wide range of in-cylinder temperatures and pressures. In-cylinder results verify the utility of the uncertainty estimates. Differences in magnitude between the estimated and measured precision were determined to be due to errors in parameter values used in the calculations. The observed 2.1% temperature precision at a temperature of 600 K was compared with previous TB-PLIF temperature measurements and shown to be approximately a factor of 2 better than previous results.
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Rothamer, D.A., Snyder, J.A., Hanson, R.K. et al. Optimization of a tracer-based PLIF diagnostic for simultaneous imaging of EGR and temperature in IC engines. Appl. Phys. B 99, 371–384 (2010). https://doi.org/10.1007/s00340-009-3815-2
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DOI: https://doi.org/10.1007/s00340-009-3815-2