The Performance Research Of Flow And Heat Transfer On 12V265 Engine Cooling System

The water cooling system is one of the important components of the diesel engine.Its function is to cool the diesel engine so that it can work normally at the optimum temperature.The flow and heat transfer of the coolant have a significant effect on the thermal load on the components such as the cylinder block and the cylinder head,the service life of the diesel engine,the fuel combustion quality,and the exhaust emissions.The cooling effect is not only related to the power output characteristics and fuel economy of the diesel engine,but also has a great influence on the mechanical reliability and the durability of the components.Therefore,the optimization design of the water cooling system for diesel engines,especially for cooling water jackets,is a long-time concern for designers.In the optimal design of the diesel water cooling system,the three-dimensional flow and the fluid-structure coupled heat exchange between the coolant and the wall are particularly important issues.Today Computational Fluid Dynamic has become the primary means of solving these problems.It uses discrete means to process the computational area,that is,to mesh the model to be analyzed,and to simulate and study the flow field distribution of the cooling fluid by solving the grid according to the relevant constraint equations.Using CFD to simulate the internal flow field of the diesel engine cooling water jacket can clearly understand the flow conditions of the coolant and analyze the cooling performance of it.In this paper,the 12V265 diesel engine is taken as the research object.The three-dimensional modeling software UG is used to build the model.Using the computational fluid dynamics software STAR-CCM+to analyze the cooling water jacket Field speed,pressure,and temperature distribution.Through the analysis of the simulation results and the review of relevant literature,the cooling performance of the diesel water cooling system is calculated and analyzed.In particular,whether the main components have the problem of insufficient cooling,and the areas with poor heat transfer and slow flow are found,and further Put forward feasible and improved solution.