Study on Analysis of Instantaneous Heat Flux Flowing into the Combustion Chamber Wall of an Internal Combustion Engine : Examination in the Case of Consideration of Heat Storage Term and the Temperature Dependency of the Thermocouple's Thermophysical Properties

抄録

Instantaneous heat flux flowing into wall surfaces of combustion chambers used to be analyzed by the use of waveforms of instantaneous temperatures measured by thin-film thermocouples. Such analyses, however, were in fact conducted using known fixed values of the thermophysical properties. In this study, the instantaneous heat flux has been studied by means of numerical analysis using differential equations (to which was added a heat storage term) taking into account the temperature dependency of the thermophysical properties. In addition, related measured values in the previous paper have also been studied again. As a result, it has been concluded that the temperature dependency of the thermophysical properties should be considered when analyzing instantaneous heat flux.