The gas temperature in an atmospheric pressure ethylene/air premixed Taran burner flame was measured using the multi-line NO-LIF thermometry. The results are presented in Fig.1. Photographs are shown in the 1st row. The technique yields the temperature field (2^nd row), the NO-LIF signal strength (3^rd row), and the scattering background as the baseline of the spectra (4^th row). In the sooting flame, the scattering off the soot particles gets so strong that a detection light filter has to be used to block the scattering and only detect NO-LIF.

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Figure 1: 1^st row: Photograph of the flame; 2^nd row: gas-phase temperature field; 3^rd row: NO-LIF signal strength; 4^th row: Scattering background as baseline of the spectra

The automated data interpretation is carried out with the spectra simulation program lifsim (www.lifsim.com) that has been developed in house.