Acoustic pyrometry in flames

Srinivasan, K., Sundararajan, T., Narayanan, S., Jothi, T.J.S. and Rohit Sarma, C.S.L.V. (2013) Acoustic pyrometry in flames. Measurement, 46 (1), 315-323. (doi:10.1016/j.measurement.2012.07.003).

Abstract

This paper investigates temperature measurement using acoustic pyrometry in hot zones and flames. For experiments in flameless hot zones, a Hartmann whistle is used as the acoustic source. Time of flight of sound waves in the heated path is calculated by cross-correlating the signals received by two microphones placed at pipe ends. Acoustic pyrometry is also performed for estimation of flame temperature in kerosene wick and candle flames, using a speaker as the acoustic source. Since length scales of single flames are small, leading to short times-of-flight, appropriate temperature profiling strategies for flame temperature estimation are identified

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