Automobile Engine Compartment Parameters Optimization Based on CFD Simulation

This paper illustrates how to use the CFD technique to analyze the cooling system of vehicle engine compartment. For the completeness of the research, the study build a wind tunnel, making the research close to the reality, to simulate two working conditions of vehicle and use the MRF technique in the fan analysis. From the result, the flow field and the temperature field characteristic near the vehicle body and the situation in the engine compartment are confirmed. Furthermore, some valid conclusion are obtained. In order to improve the performance, some improvement schemes, basing on the analysis result, are putted forward. The schemes place guide plates to reform the flow condition in the engine compartment, preventing the vortex appearing to make the flow fluently. Meanwhile, compare the air-inlet rate of the radiator which use different guide plate projects, setting the angle of plate regularly from 0 degrees to 15 degrees in 3 degrees intervals. According to the comparison, these optimize schemes do acquired certain effect.