Temperature Field Simulation and Analysis of Cylinder-Jacket Component of Diesel Engine Based on Fluid-Solid-Heat Coupling

A four-stroke direct injection diesel engine is taken as the study object, and a cylinder-jacket-coolant-piston coupling model is built up. With the research method of fluid- solid-heat coupling, the computational regions of both fluid and solid are coupled, which are separated in traditional temperature-field computation, and the puzzle of iterating difficultly due to the differences of temperature governing equations and numerical algorithms is solved. Using the finite volume method to discretize and solve the whole computational field, more accurate and more reliable results are achieved. The numerical model and the coupling computational method employed here are significant to the optimization designs of diesel engine thermal strength as well as the cooling system.