caa a22 4500 445368209 CHVBK 20180317142937.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s00340-011-4564-6 doi (NATIONALLICENCE)springer-10.1007/s00340-011-4564-6 Imaging of the oxygen distribution in an isothermal turbulent free jet using two-color toluene LIF imaging [Elektronische Daten] [K. Mohri, M. Luong, G. Vanhove, T. Dreier, C. Schulz] The results of a novel technique for the quantification of oxygen in an isothermal turbulent free jet using toluene laser induced fluorescence (LIF) are presented. This method relies on the red-shift of the toluene LIF emission spectrum with increasing oxygen concentration. Evaluating the LIF signal ratio from two different wavelength regions simultaneously produces results that depend only on the local oxygen concentration. From calibration data, obtained from repeated tests, the oxygen sensitivity of the two-color LIF technique is best for oxygen partial pressures $p_{\mathrm{O}_{2}} \leq 120\mbox{ mbar}$ in the current setup. Quantified images of oxygen distribution are presented for 40.4, 60.5, 80.5, and 103 mbar $p_{\mathrm{O}_{2}}$ in the toluene-seeded jet flow that is shielded by a toluene-seeded nitrogen co-flow at atmospheric pressure and temperature. Based on the average oxygen concentration images (obtained from 100 instantaneous oxygen images), the error in accuracy of measuring the oxygen concentration was 0.8, 3.0, 7.7, and 7.3% with a precision of ± 8.6, 5.5, 13.3, and 11.6% for the jet $p_{\mathrm{O}_{2}} = 40.4,\, 60.5,\, 80.5,\mbox{ and }103\mbox{ mbar}$ cases, respectively. The main jet flow characteristics have been captured by the technique as determined from the measured oxygen distribution images. Centerline profiles of average oxygen concentration, normalized to the value at the nozzle exit, demonstrate self-similar behavior from 5 mm above the nozzle exit. Radial oxygen concentration profiles exhibit a Gaussian-type distribution that broadens with distance above the nozzle exit, in agreement with literature. Springer-Verlag, 2011 Mohri K. IVG, University of Duisburg-Essen, Duisburg, Germany aut Luong M. IVG, University of Duisburg-Essen, Duisburg, Germany aut Vanhove G. PC2A, UMR 8522 CNRS Universite de Lille 1, Villeneuve d'Ascq, France aut Dreier T. IVG, University of Duisburg-Essen, Duisburg, Germany aut Schulz C. IVG, University of Duisburg-Essen, Duisburg, Germany aut Applied Physics B Springer-Verlag 103/3(2011-06-01), 707-715 0946-2171 103:3<707 2011 103 340 https://doi.org/10.1007/s00340-011-4564-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4564-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mohri K. IVG, University of Duisburg-Essen, Duisburg, Germany aut NATIONALLICENCE 700 1- Luong M. IVG, University of Duisburg-Essen, Duisburg, Germany aut NATIONALLICENCE 700 1- Vanhove G. PC2A, UMR 8522 CNRS Universite de Lille 1, Villeneuve d'Ascq, France aut NATIONALLICENCE 700 1- Dreier T. IVG, University of Duisburg-Essen, Duisburg, Germany aut NATIONALLICENCE 700 1- Schulz C. IVG, University of Duisburg-Essen, Duisburg, Germany aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 103/3(2011-06-01), 707-715 0946-2171 103:3<707 2011 103 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer