Effect of Incident Laser Sheet Orientation on the OH-PLIF Imaging of Detonations

Karl P. Chatelain, R. Mevel, J. Melguizo-Gavilanes, A. Chinnayya, S. Xu, Deanna Lacoste

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    11 Scopus citations


    This study aims to investigate the effect of laser sheet orientation on the OH-PLIF imaging of a detonation wave and to identify the potential benefit of using a transverse laser orientation, compared to the conventional frontal orientation. In this study, we developed a new LIF model, based on a pre-existing one, to include a more fundamental calculation of the absorption lineshape and the effects of the laser orientation on the fluorescence signal. One- and two-dimensional simulations are used to validate this new LIF model for both laser orientations using OH-PLIF images from the literature. The effect of the two laser orientations on detonation imaging is investigated numerically on a 2D OH field. Based on these results, the frontal orientation seems more suitable to collect information near the detonation front, while the transverse laser orientation can give more quantitative information far from the front and only for short optical paths. With the present laser configuration and experimental conditions, both laser orientations present the same limitation with a strong laser energy absorption for long optical paths. While these first results show a qualitative agreement with experimental data, new experimental data are required to quantitatively validate this promising transverse laser orientation and confirm its relevance for OH- PLIF imaging of detonations.
    Original languageEnglish (US)
    JournalAccepted by Shock Waves
    StatePublished - 2020

    Bibliographical note

    KAUST Repository Item: Exported on 2020-10-01
    Acknowledgements: Research reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST). RM was supported by the 1000 Young Talent of China program, a start-up fund of the Center for Combustion Energy of Tsinghua University, and the 1000 Young Talent Matching Fund from Tsinghua University. The computations were performed using HPC resources from the cluster of Pprime, the Mesocentre de Calcul Poitevin and from GENCI-CINES (Grant 2018-A0052B07735). This work was supported by the CPER FEDER Project of Region Nouvelle Aquitaine. The authors are grateful to Joanna M. Austin for allowing the use of her experimental OH-PLIF image in Fig. 3.


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