Abstract
Acoustic Pyrometry enables non-intrusive, accurate, reliable gas temperature measurements which can be used for controlling operations on real-time basis, therefore, it particularly applies to hot zones and extremely harsh environments. In the application study on multiple acoustic paths intersection in temperature field measurement, two key techniques that time of flight (TOF) of acoustic waves measurement and temperature field reconstruction were involved. This paper introduces the development of Acoustic Pyrometry, and then focus on two key techniques. The cross-correlation algorithm to calculate the TOF and least-square method for temperature field reconstruction are presented. The advantages and limitations of these techniques are also discussed. Several emerging questions are proposed.
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