Shock-tube experiments have been performed to assess the performance of various optical filters in capturing time-resolved chemiluminescence emission. The purpose was to see if choice of filter bandwidth changed the observed results. Filters included narrow-band ones at ± 10 nm and ± 40 nm and a broadband UG-11 schott filter. The main species of interest was OH*; therefore most of the filters used in this study were centered near 307 nm. Experiments were performed in highly diluted, stoichiometric mixtures of H_2/O_2/Ar and CH_4/O_2/Ar at a wide range of temperatures and pressures behind reflected shock waves in a shock tube. A dual optical setup on both sides of the shock tube was optimized to allow for simultaneous measurements using two different filters. In addition, experimental results were compared with two chemical kinetics models containing OH* chemistry. Good agreement was seen at atmospheric pressures, while the agreement at higher pressures shows that improvements to the model can still be made. For the cases near 1 atm, the results are not filter specific, but some differences are seen at the highest temperatures for the higher-pressure experiments near 16 atm.
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