Study on Thin Film Thermocouple Measuring Instantaneous Temperature on Surface of Combustion Chamber Wall In Internal Combustion Engine : 2nd Report, Study on Thin Film Thermocouples Embedded in Combustion Chamber Wall

Abstract

Following a study in which the area surrounding thin film thermocouples was assumed to be heat insulated as reported previously, the distribution of temperatures in thin film thermocouples embedded in combustion chamber walls of internal combustion engines which were in steady-state and unsteady-state temperature fields was studied, where the equations of different element methods, introduced in previous report, were expanded. Effects of the adiabatic layer and thermocouple body materials on the measured combustion chamber wall surface temperatures and heat fluxes were studied. As a result, it was indicated that thin film thermocouples capable of measuring instantaneous temperatures and heat fluxes on the combustion chamber wall with high accuracy, could be produced.