Finite element simulation on transient coupled heat transfer of piston-cylinder liner

Coupled heat transfer method was put forward to resolve the difficulty of boundary conditions exerted on single part in numeric simulation of heat transfer.Based on coupled heat transfer theory and finite element method(FEM),outer boundary conditions between parts were transformed into inner boundary conditions of the component.Initial condition and boundary conditions of heat transfer were calculated through the working process program and the empirical formulas.With piston-cylinder liner in diesel engine taken as an example,the temperature distribution and its variability with cyclic time of the component were simulated,and the calculation results were compared with the test data.Simulation of heat transfer of piston-cylinder liner using the coupled method simplifies the boundary conditions and accords with the actual working mode.