Today during the development of a new car, module designs are commonly used to simplify the manufacturing process and minimize problems occurring during the assembly of components. A Front End Module (FEM) is one such automotive component consisting of a cooling module (condenser, radiator, fan and shroud), a headlamp, a bumper and a carrier. A cooling module is a core part of the FEM because of the Air Conditioning system and engine cooling performance. Moreover, acoustic performance of the cooling fan is important when considering human sensitivity to noise. In this study, a CFD numerical simulation process for the aeroacoustics of an automotive FEM cooling fan is presented. It was used during the development stage of a new car for validation of aeroacoustic characteristics and performance. Using an appropriate CFD domain for simulation, a moving reference frame (MRF) and moving (or sliding) mesh scheme were used to simulate the rotational motion of the cooling fan. Using the acoustic model in FLUENT, the flow and transient sound pressures were calculated. By the post-processing of sound pressure level analysis, it was possible to analyze the acoustic characteristics of the cooling fan that was generating flow noise.
Aeroacoustic simulation of automotive front end module cooling fan
Aeroakustische Simulation des Kühlluftventilators in einem Fahrzeugfrontmodul
2005
8 Seiten, 9 Bilder, 3 Quellen
Conference paper
English
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