22 January 1999 Modified sodium line-reversal temperature measurements in oxy-fuel flames
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Abstract
Oxy-fuel technology that uses high purity oxygen in place of air has demonstrated to be a cost-effective method for improving melting operations providing benefits in fuel savings, reduction in capital investment, and reduction of NOx and particulate matter. These benefits are evident in the glass industry where an estimated 15 percent of the US production has already been converted to oxy-fuel. However conversion from air-fuel is complicated by the drastic differences between the combustion characteristics such as flame temperature, momentum, flame chemistry, and heat transfer properties. For optimum performance using oxy-fuel combustion well-characterized burners with knowledge of the temperature in the combustion space is needed. Temperature characteristics for a given burner design are useful for both validation and parameter adjustment in 3D numerical models and optimizing the flame to the process. Because of the higher temperatures and steeper gradients in oxy-fuel flames traditional measurement techniques used on industrial flames, e.g., suction pyrometer or coherent anti-stokes Raman spectroscopy have limited use. Here we present results using a modified line reversal technique to monitor the emission and transmission of oxy-fuel flames seeded with sodium. The technique provides real-time information on the line-of-sight temperature observed from industrial scale turbulent flames.
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William A. Von Drasek, William A. Von Drasek, Olivier Charon, Olivier Charon, Romain P. Roux, Romain P. Roux, } "Modified sodium line-reversal temperature measurements in oxy-fuel flames", Proc. SPIE 3535, Advanced Sensors and Monitors for Process Industries and the Environment, (22 January 1999); doi: 10.1117/12.337480; https://doi.org/10.1117/12.337480
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