| With the development of the automotive industry, strengthen of people’s environment protection consciousness and increasingly stringent for environmental regulations, people strengthen the improvement and requirements about the emission performance of the engine when in pursuit of the power performance and economical efficiency. In order to meet the requirements of the new emission regulations, various kinds of schemes have been proposed to reduce emission pollution of the engine. Cooling system can not only improve the power of engine, but also can significantly reduce the pollutants. As an indispensable part of cooling system, it is very important to improve the performance of the engine.As the internal flow field complexity and structural complexity of intercooler, which makes the experimental study get many restrictions. In this paper, the CFD software is used for temperature field and flow field numerical simulation analysis and comparison of cooling core and fins, so it can clearly understand the distribution and changes of internal pressure, temperature, velocity and other parameters in cooling core and the fins, Optimizing its geometrical parameters can effectively reduce the experimental design costs and shorten the design cycle.In this paper, the evaluation index of intercooler performance is its flow properties, heat transfer performances and density restoration. Flow properties are evaluated by pressure drop and heat transfer performances are evaluated by its coefficient. Intercooler calculation model is established by 3D software and simplified; Grids will be divided by applying Workbench & ICEM software; Intercooler boundary conditions can be obtained by testing; Fluent numerical calculation method can be adopted to make calculation and analysis and access to traditional intercooler cooling core and fins pressure, temperature and speed contours. Through the post-processing software, it is found that performance of intercooler still have room to improve through studying structure and heat exchange performance characteristics of the flow field.The new intercooler is established to make calculation and analysis by Fluent and access to the new intercooler cooling core and fins pressure, temperature and speed contours. Comparing with the original cooling core, the pressure drop value of the new cooling core reduces and the heat dissipation capacity increases, which makes the heat transfer performance better. Comparing with the original louver fin, the pressure drop value and heat dissipation capacity of the new fin incease, which makes the flow properties reduce Slightly and the heat transfer performance increas. The comprehensive properties of the new intercooler improve.This paper makes the comprehensive numerical simulation of flow and heat transfer of the intercooler, compare the flow properties and the heat transfer performance of the new and the original intercooler, it has a certain academic significance and value, also provides a theoretical basis to optimization design and match selection the car cooling system. |
