Comparison of thermocouple temperature measurements of simple and precessing jet propane flames

Abstract

An experimental study was conducted to compare the temperature characteristics of simple and precessing jet flames of commercial propane. A fine wire R-type thermocouple is used to measure both axial and radial temperature profiles. The measurements are corrected for effects of radiation, convection and conduction. The results show that the overall maximum temperatures are similar in both the precessing and simple jet flames, but are also affected by the amount of soot. In general, the precessing jet flame has lower mean temperatures. The differences in temperature between the two flames and the influence of flame strain on temperature,through its influence on soot, are discussed.