Finite Element Analysis of the Thermal Field of Piston in an External Combustion Cam Engine

Abstract

As the most dominative component under stress in an external combustion cam engine, the working condition of piston is very rigor. Once new design type and technical improvement is applied, it is necessary to analysis its thermal load and take secure steps. And the finite element model on each conditions of thermal is calculated, which is used to estimate the temperature field and provide a theoretical basis for further structural strength analysis and optimization design. Choosing analysis results of the piston as reference and taking five structural parameters of the piston as design variables, two objective functions including piston mass and maximal Von Mises stress are respectively considered. The optimum design of the piston is executed and the results indicate that it is feasible to improve temperature field and strength of the piston. These results enrich and develop the research on structural analysis and optimization of spatial engine, which are of guiding significance for analyzing engine strength and related problem in theoretically.

Simulation analysis and performance optimization of the combustion process of the opposed cam piston engine

“…The engine was successfully utilized in MK46 torpedo power unit. 19 At the end of the 20th century, the opposed cam piston engine designed by Russian scholars adopted a double-cam structure to achieve two pistons opposed to work. In the case of little increase in space, the number of cylinders of the engine was doubled and the power-to-weight ratio of the engine was greatly improved, while which can effectively offset the unbalanced excitation force of the engine and reduce the engine noise.…”