caa a22 4500 606199039 CHVBK 20210128100936.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s00348-015-1906-x doi (NATIONALLICENCE)springer-10.1007/s00348-015-1906-x Temperature measurements in an axisymmetric methane-air flame using Talbot images [Elektronische Daten] [P. Khramtsov, O. Penyazkov, I. Shatan] The paper discusses the principles of optical testing of transparent objects using the Talbot images method and its applicability to diagnostic of flames. The experimental study was performed for premixed methane-air flame formed by an axisymmetric nozzle. The local deflection angles of the probe radiation were determined from measurements of the relative displacements of intensity maxima of the Talbot image which is caused by passing of light through the flame. The Abel integral equation was solved to reconstruct the refractive index distribution in the flame. Calculation of the temperature field from the refractive index data was based on neglecting the spatial variation of the component composition. Inaccuracy of the calculations was evaluated by comparing the results with the thermocouple measurements. The results demonstrate that the Talbot images method can be used to measure the temperature distribution in axisymmetric reacting gas flows with high spatial resolution. Springer-Verlag Berlin Heidelberg, 2015 Khramtsov P. A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 220072, Minsk, Republic of Belarus aut Penyazkov O. A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 220072, Minsk, Republic of Belarus aut Shatan I. A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 220072, Minsk, Republic of Belarus aut Experiments in Fluids Springer Berlin Heidelberg 56/2(2015-02-01), 1-9 0723-4864 56:2<1 2015 56 348 https://doi.org/10.1007/s00348-015-1906-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-015-1906-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Khramtsov P. A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 220072, Minsk, Republic of Belarus aut NATIONALLICENCE 700 1- Penyazkov O. A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 220072, Minsk, Republic of Belarus aut NATIONALLICENCE 700 1- Shatan I. A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 220072, Minsk, Republic of Belarus aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/2(2015-02-01), 1-9 0723-4864 56:2<1 2015 56 348