Time-of-flight estimation in acoustic pyrometry: sensitivity to pulse characteristics

Abstract Acoustic pyrometry is a non-intrusive measurement technique that may have several applications in turbomachinery. This methodology estimates the gas temperature by measuring time of flight an acoustic wave moving through medium. It can be accomplished placing sound source (emitter) and set microphones (receivers) on opposite sides section. The emitter generates pulse, receivers detect it. Since emitter-receiver distances are known fixed, average temperatures paths traversed pulse computed estimating time-of-flight deconvolution techniques. However, despite straightforward principle, suffers variation amplitude when propagating within medium because energy losses ambient noise. Hence, estimation becomes critical task, especially considering high-frequency waves or short between sensors. then fundamental to select proper maximise cross-correlation signals couples, thus improving accuracy measurements and, consequently, spatial distribution specific area. study preliminary investigation, based modelling approach, estimate impact different measurement. results this analysis will useful design setup application.