Computer simulation of piston-piston ring-cylinder liner coactions in combustion engines

摘要

The aim of the numerical simulations presented in this paper was the calculation of the loads of the work process between elements of the ring seal components of the diesel engine. In this engine a sealing piston ring with an antiwear ceramic cover was developed. A computer simulation, which as model loads uses program KIVA3 for combustion engine work process computations, has been developed in this paper. This makes it possible to compute the pressure and temperature distributions and the motion of the charge in the combustion chamber at a particular point in the work cycle. The computer models render the design material features of the ring seal components. The models were discretized using EDS's Unigraphix software (UG Scenario, see Appendix) and tetra-nodal, tetrahedral elements. The piston ring coating (TiN-titanium nitride; PAPVD method) was modelled using quadrilateral plane elements. For the first time a coaction has been described between a ring seal of changing properties of piston ring outside layers and other elements, which is a unique achievement of the author. The finite element method (FEM) analysis (MSC/NASTRAN was used as the solver in UG Scenario, see Appendix) allowed us to calculate the distribution of temperature range, heat flow, loads, reduced stresses, displacements, and reaction forces in a ring with coating and cylinder liner in the seal. Positive results of numerical calculation constitute the basis for further research on a real object.