Abstract
Two-dimensional gas-phase temperature fields were measured in spray flames and evaporating spray systems using laser-induced fluorescence (LIF) of nitric oxide (NO). The recently developed multi-line technique yields absolute temperature without calibration. It is successfully applied to temperature measurements in the presence of droplets. The method is based on the temperature dependence of the NO-LIF signal. Measurements have been carried out in heated nitrogen flows at room temperature to validate the accuracy (<±1%) and precision (1%) of the technique by comparing results to thermocouple readings. Temperature measurements in a dilute evaporating acetone spray at room temperature showed cooling of the entrained air of 15±6 K. Temperature imaging in an ethanol spray flame at various conditions yields the entire temperature range from the coflow temperature at 300±4 K (1%) to the flame temperature at 1900±40 K (2%).
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07.20.Dt; 32.50.+d; 42.62.Fi
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Kronemayer, H., Bessler, W. & Schulz, C. Gas-phase temperature imaging in spray systems using multi-line NO-LIF thermometry. Appl. Phys. B 81, 1071–1074 (2005). https://doi.org/10.1007/s00340-005-1986-z
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DOI: https://doi.org/10.1007/s00340-005-1986-z