2007 · 10 citations · 7 references
ComputingComputational EngineeringMechanical EngineeringAerodynamicsComputational AcousticsFinite Element MethodsAcoustic ModelingAcoustic Source ModelingAeroacousticsAeroacoustics SimulationFinite Element FormulationNoise PredictionAerodynamic LoadingCfd SimulationCfd ValidationComputer-aided EngineeringFan AerodynamicsFan NoiseFan Noise PredictionFan Performance Modeling
SUMMARY The purpose of this work is to evaluate a Computer Aided Engineering (CAE) method in which computational aero acoustics (CAA) techniques are used to predict the noise level from automotive fans. In this paper the extended version of the variational formulation of Lighthill's analogy is used. This formulation is ideally suited to the finite element method (FEM). It accounts for aerodynamic sources through two source terms. The first term accounts for volume sources; the second term accounts for sources defin ed on control surfaces, i.e., surfaces where the normal flow velocity does not vanish. In the first section of this paper, the methodology is presented for applications without a fan. The second section presents the extension for rotat ing machines. In the third section, the coupling strategy with the CFD code is presented. T he fourth section presents a validation on the problem of a production HVAC blower.
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