Wavelength and energy dependent absorption of unconventional fuel mixtures

N. Khan; Z. Saleem; A. A. Mirza

doi:10.1117/12.622528

16 November 2005 Wavelength and energy dependent absorption of unconventional fuel mixtures

N. Khan, Z. Saleem, A. A. Mirza

Proceedings Volume 5999, Intelligent Systems in Design and Manufacturing VI; 59990K (2005) https://doi.org/10.1117/12.622528
Event: Optics East 2005, 2005, Boston, MA, United States

Abstract

Economic considerations of laser induced ignition over the normal electrical ignition of direct injected Compressed Natural Gas (CNG) engines has motivated automobile industry to go for extensive research on basic characteristics of leaner unconventional fuel mixtures to evaluate practical possibility of switching over to the emerging technologies. This paper briefly reviews the ongoing research activities on minimum ignition energy and power requirements of natural gas fuels and reports results of present laser air/CNG mixture absorption coefficient study. This study was arranged to determine the thermo-optical characteristics of high air/fuel ratio mixtures using laser techniques. We measured the absorption coefficient using four lasers of multiple wavelengths over a wide range of temperatures and pressures. The absorption coefficient of mixture was found to vary significantly over change of mixture temperature and probe laser wavelengths. The absorption coefficients of air/CNG mixtures were measured using 20 watts CW/pulsed CO₂ laser at 10.6μm, Pulsed Nd:Yag laser at 1.06μm, 532 nm (2^nd harmonic) and 4 mW CW HeNe laser at 645 nm and 580 nm for temperatures varying from 290 to 1000K using optical transmission loss technique.

Citation Download Citation

N. Khan, Z. Saleem, and A. A. Mirza "Wavelength and energy dependent absorption of unconventional fuel mixtures", Proc. SPIE 5999, Intelligent Systems in Design and Manufacturing VI, 59990K (16 November 2005); https://doi.org/10.1117/12.622528

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