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Modern vehicles require an optimized thermal management system to minimize fuel consumption, and customer wishes for higher powered engines as well as for more safety and comfort result in more tightly packed engine compartments. All these items may lead to rising heat load for cooling package. And heat exchangers module is one of the most important subsystems of thermal management system. The internal combustion engine radiator cooling system is one of the most important components of the internal combustion, and it has a significant impact of engine power, economy and reliability. In modern society, heavy-duty trucks and bus engines use turbo-charged and high-pressure injection techniques to strengthen the engine increased and the heat load increases; Therefore, the capacity of the cooling system been put forward higher requirements. In addition, the engine compartment space in the cooling system capacity is also affected an important factor. Radiator has experienced nearly a century of development, although the performance of the radiator is substantially improved, but progress is relative to the engine, it lags a lot. Current performance radiator has become a bottleneck restricting the development of the cooling system, so the research, development and innovation of radiator have become the focus of development. Therefore, a better design and manufacturing performance, smaller radiator, internal combustion engines to meet the needs of functioning in various operating conditions, will certainly be the future trend.This article is based on the CFD method of a model simulation of locomotive radiators. With the experimental data and the method of simulation, the first performance is testing the radiator, and getting the relevant test data in the test. Using test data analysis the factors of the performance of affecting the radiator, and getting relationship of air cooling, heat transfer coefficient, air pressure loss and air mass flow rate. FLUENT of CFD software is using a computer on the radiator to simulate the performance and simulation, and compared with the experimental data obtaining within 7.9% error control to verify the simulation method. Finally, to keep the overall length of the radiator, height, fin pitch, fin height, fin thickness and the same, by changing the fin on the open diamond the size of the hole, and each of its simulation and computer simulation then giving the reasonable evaluation of the results, and providing a theoretical basis for the calculation of the optimal design to the radiator.
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