Engine Coupled System Of Conjugate Heat Transfer Of Steady-state Solid Flow Numerical Simulation Study

Heat transfer calculation is an important part of engine thermal management, which can play a significant part in guiding the system integration and optimization design of automobile engines. Heat transfer calculation is a quite complicated system engineering, construction coupling of the engine and physics fields coupling during the working process will be involved in the calculation. The integral coupling calculation of the construction and physics fields can be achieved by adopting solid-fluid coupling algorithm. This solid-fluid coupling algorithm is a efficient method in heat transfer calculation, because it regards the whole engine as an integer, so some boundary conditions which are difficult to confirm when calculating separately can be transformed into inner boundary, and the definition of these boundary conditions can be omitted. Theoretic analysis of solid-fluid coupling algorithm is carried out in this paper, and its feasibility is validated by some example. The following works are completed in this paper:1. Solid-fluid coupling algorithm and its feasibility are discussed theoretically. Governing equation of the solid-fluid coupling system is confirmed based on the works above.2. The principle of model construction, grid mesh generation, boundary condition definition algorithm and governing equation solution are confirmed.3. Take 6130 engine as an example of simulating calculation, solve continuity equation, energy equation and turbulent flow equation by the finite volume method together after construct the model and define the boundary conditions, and get a convergent result. Validate the feasibility of the algorithm by contrast the results of calculation and experiment.4. Analyze the calculation results above such as temperature field and flow field, contrast the heat transformation with different cooling water inflow velocity, it can be shown that solid-fluid coupling algorithm can simulate the heat transformation under different situation by adjusting various parameters, in order to study heat transfer calculation and guide the optimization design of automobile engines.5. Take WD615 engine as an example of simulating calculation, validate the feasibility of the algorithm by contrast the results of calculation and experiment.