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Aeroacoustic CFD Simulation for Automotive Air Conditioning Applications: Behr's Experience
Published May 20, 2007 by Institution of Mechanical Engineers in United Kingdom
Air flow phenomena in heating, ventilation and air conditioning (HVAC) units, ducts and vents are among the major noise sources limiting passenger comfort. BEHR has pioneered in applying computational fluid dynamics (CFD) simulation to identify flow-induced noise sources with several research projects. The paper will focus on the results of two typical cases: The flow around a partially closed flap in an HVAC unit and the jet behind the grille of a vent, through which air is entering the cabin. The comparisons of measured and CFD-predicted noise spectra show good agreement at various inner surface locations. Accurate noise source prediction is essential for succeeding noise propagation calculations and comfort evaluations.