Vol.:(0123456789) 1 3 Experiments in Fluids (2020) 61:45 https://doi.org/10.1007/s00348-020-2883-2 RESEARCH ARTICLE Filtered Rayleigh scattering measurements of temperature in cellular tubular fames Chad D. Carpenter 1  · Robert W. Pitz 1 Received: 18 August 2019 / Revised: 29 December 2019 / Accepted: 7 January 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract Steady, premixed tubular fames that produce cellular fames due to low Lewis number can assist in validating difusional properties for numerical models. The lean hydrogen-air mixture creates conditions of low Lewis number that have shown to result in cellular fames inside tubular burners due to preferential difusion. Filtered Rayleigh scattering (FRS) is used to achieve two-dimensional temperature measurements across perpendicular planes in the cellular tubular fame. Diferent FRS strategies, a pulsed Nd:YAG laser with and without Fabry–Perot etalon as well as a continuous wave laser, are contrasted for consistency and uncertainty in the tubular fame measurements. The FRS temperature profles are found to be consistent with previous spontaneous Raman scattering temperature measurements but difer from previous direct numerical simula- tion results. Graphic abstract 1 Introduction Lean premixed hydrogen-air combustion has been studied due to the recent interest in applications for power genera- tion. The hydrogen-air fames have been analyzed in terms of stretch and curvature in tubular burners (Hu et al. 2009; Pitz et al. 2014). The fames inside tubular burners or otherwise called tubular fames have shown to produce cellular fames due to low Lewis number (dimensionless number defned as the ratio of bulk thermal difusivity to mass difusivity of the defcient reactant). A beneft of these cellular fames is the potential to assist difusional property validation that can be used for numerical models. Lean premixed tubular hydrogen-air fames have been studied using chemilumines- cence, laser-induced Raman scattering, laser-induced fuo- rescence, and numerical simulations (Hall and Pitz 2013, 2016). Chemiluminescence typically only provides qualita- tive data regarding high temperature zones. Previous tubular fame temperature measurements by spontaneous Raman scattering were up to 200 K higher than the temperatures calculated by direct numerical simulation * Chad D. Carpenter chad.d.carpenter@vanderbilt.edu 1 Mechanical Engineering, Vanderbilt University, Nashville, TN 37235-1592, USA