3-D Simulation of Steady Heat Transfer of Fluid-Solid Coupled System in Engine Coolant System

To solve the coupled flow and heat transfer boundary problem between the solid cylinder and fluid coolant,a fluid-solid coupled system including piston-liner-coolant-body was established.Modern FEA software can solve the fluid-solid coupled heat transfer problem by transforming outer boundary condition to inner boundary condition and makes heat transfer simulation more reasonable and simple.As a verifying example,the steady heat transfer of a 3-D coupled system in a turbocharged diesel engine was simulated by FEM software named ANSYS.Comparison between simulation and measurement on the piston and liner at the rated operation mode shows that the simulated results are in good agreement with experimental data and the deviation is less than 8%.Thus,fluid-solid coupled method can simulate the engine steady heat transfer.