caa a22 4500 445367911 CHVBK 20180317142936.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s00340-010-4338-6 doi (NATIONALLICENCE)springer-10.1007/s00340-010-4338-6 Laser-induced plasma in methane and dimethyl ether for flame ignition and combustion diagnostics [Elektronische Daten] [J. Kiefer, J. Tröger, Z. Li, M. Aldén] In this paper we report the investigation of the laser-induced breakdown and ignition behaviour of methane/air and dimethyl ether (DME)/air mixtures. Moreover, the optical emission from the induced plasma is utilized for determining the mixture composition quantitatively by means of laser-induced breakdown spectroscopy (LIBS). To the best of the authors' knowledge, LIBS and laser ignition of DME have not been reported in literature before. The technique under investigation is finally employed for combustion diagnostics in laminar as well as turbulent flames. In the laminar premixed and non-premixed flames the LIBS spectra allow spatially resolved measurements of the equivalence ratio and enable studying the mixing of gases provided through the burner with the surrounding room air. In addition, the breakdown threshold of the applied laser pulse energy yields an estimate for the local temperature. In the turbulent cases single-shot LIBS spectra are recorded at fixed position allowing the derivation of local statistical fluctuations of the equivalence ratio in partially premixed jet flames. The results show that laser-induced breakdowns have a strong potential for flame diagnostics and, under suitable conditions, for the ignition of combustible mixtures. Springer-Verlag, 2010 Kiefer J. Lehrstuhl für Technische Thermodynamik and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Universität Erlangen-Nürnberg, 91058, Erlangen, Germany aut Tröger J. Lehrstuhl für Technische Thermodynamik and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Universität Erlangen-Nürnberg, 91058, Erlangen, Germany aut Li Z. Division of Combustion Physics, Lund University, P.O. Box 118, 22100, Lund, Sweden aut Aldén M. Division of Combustion Physics, Lund University, P.O. Box 118, 22100, Lund, Sweden aut Applied Physics B Springer-Verlag 103/1(2011-04-01), 229-236 0946-2171 103:1<229 2011 103 340 https://doi.org/10.1007/s00340-010-4338-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-010-4338-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kiefer J. Lehrstuhl für Technische Thermodynamik and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Universität Erlangen-Nürnberg, 91058, Erlangen, Germany aut NATIONALLICENCE 700 1- Tröger J. Lehrstuhl für Technische Thermodynamik and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Universität Erlangen-Nürnberg, 91058, Erlangen, Germany aut NATIONALLICENCE 700 1- Li Z. Division of Combustion Physics, Lund University, P.O. Box 118, 22100, Lund, Sweden aut NATIONALLICENCE 700 1- Aldén M. Division of Combustion Physics, Lund University, P.O. Box 118, 22100, Lund, Sweden aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 103/1(2011-04-01), 229-236 0946-2171 103:1<229 2011 103 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer