Development of thin-film thermocouple measuring for instantaneous heat flux flowing into the ceramic combustion chamber wall

Abstract

In order to evaluate the validity of a low heat rejection engine proposed for the reduction of heat loss, a thin film thermocouple was developed for accurate measurement of the instantaneous heat flux flowing into the ceramic combustion chamber wall. The thin film thermocouple is the pair-wire type construction without effects of the material of the thermocouple and the instantaneous heat flux, which was confirmed by finite element analysis. This paper also shows examples of measurements conducted on the instantaneous heat flux flowing into the ceramic combustion chamber, using the pairwire type thin film thermocouple made of ceramic base material.