Cell vertex FVM for thermoelastic analysis of the piston with thermal barrier coating

Abstract:

To analyze the performance of the piston with thermal barrier coating (TBC), two dimensional cell vertex FVM (CV-FVM) has been extended to the research of the thermoelastic performance of three-dimensional composite structures. The staggered grid technique was adopted to incorporate property variation into the course of solution so as to avoid numerical discontinuity. The unknown variable was defined at the cell vertex, while the material property was defined at the cell center. The developed CV-FVM was used to simulate the thermoelastic fields of the ordinary piston and the predicted results agreed with the ANSYS results. Then, the CV-FVM was used to simulate the thermoelastic fields of the TBC piston and the performance were analyzed. The maximum temperature is in the area between the combustion chamber and the top surface, and the maximum stress is around the interface between the ceramic layer and the cohesive layer. The circumferential stress contributes the main part of the thermoelastic stress in the TBC area. The successful application demonstrates that the CV-FVM can be used as a predictive tool for the thermoelastic analysis of the TBC piston.