METHOD FOR DETERMINING THE TEMPERATURE INSIDE A COMBUSTOR

摘要

A method for determining the temperature of an aggressive and/or abrasive gas is described using an acoustic transmitter and an acoustic receiver. The transmitter emits an acoustic signal with varying frequencies and the receiver extracts from the acoustic input signal a frequency of the maximum. Based on this the frequency of this maximum the temperature of the gas between transmitter and receiver is calculated.

主权项

1. A method for determining the combustion temperature in a combustor by acoustic measurements having an active acoustic source and a receiver for receiving the output of the acoustic source, said method comprising:
emitting an acoustic signal from the acoustic source, the acoustic signal having a frequency which is within a frequency band that comprises one resonance frequency of the gas in the combustor, receiving the acoustic signal from the acoustic source by means of the receiver, and determining the actual temperature (Tgas (t)) of said gas based on the actual resonance frequency (fres (t)) of said gas, wherein said acoustic source and said receiver are installed at the walls of the combustor and the combustor itself is used as resonance cavity.