Noise Reduction in Automobile: Flow Analysis of Air Intake Duct



The air intake system of an automobile engine is divided into the dirty side from the passage where air intake begins through to the air cleaner and the clean side from the sir cleaner to the section just in front of the air intake manifold. In this study, the dirty side of the air intake system was selected for interpretation with the setting of the parameters such  as  the flux, pressure and temperature that corresponds to each of the numbers of the engine speed (RPM) as the terms of interpretation. Flux, pressure and noise within the air intake equipment were then obtained by using the said parameters in order to analyze and forecast the flow pattern and characteristics of the air intake system to be used as the basic data in an effort to reduce the flow noise. The air intake system was modeled by using CAITA while the analysis of the flow and noise was  executed by using the ANSYS finite element interpretation program. The majority of the noise due to intake flow occurred at the inlet of the intake system and was confirmed to be approximately 78dB at 5,000rpm.

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