Measurement of Jet Engine Combustion Temperature by the Use of Thermocouples and Gas Analysis

The measurement of jet engine combustion temperature is accomplished principally by the use of either thermocouples or gas analysis. Although more tedious, gas analysis is required to measure the highest temperature levels such as in afterburners, while thermocouples are normally adequate to measure the exit temperatures from main combustors. The measurement techniques are presented and determination of the true temperature is described, along with the errors which are involved in each case. Advantages and limitations of the two methods are discussed, and criteria are presented to aid in the selection of the best method for a particular application.