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Numerical Aeroacoustic Noise Prediction for Complex HVAC Systems
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 13, 2018 by SAE International in United States
Annotation ability available
Event: 10th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference
Reliable tools for the prediction of aeroacoustic noise are of major interest for the car industry and also for the vendors of heating, ventilation and air conditioning (HVAC) systems whose aim is to reduce the negative impact of HVAC noise onto passengers. In this work a hybrid approach based on the acoustic perturbation equations is tested for this purpose. In a first step, the incompressible flow field is computed by means of a commercial finite volume solver. A large eddy simulation turbulence model is used to obtain time resolved flow data, which is required to accurately predict acoustic phenomena. Subsequently, the aeroacoustic sources are computed and conservatively interpolated to a finite element grid, which is used to calculate the sound radiation. This procedure is tested for an HVAC unit, a radial blower and finally for a complete system, which combines these two components. Measurements of the aeroacoustic noise excited by these components are performed in a semi-anechoic chamber. The comparison of spectra obtained from the simulations and the experiments reveals a good agreement up to a specific frequency.
CitationTautz, M., Kaltenbacher, M., and Becker, S., "Numerical Aeroacoustic Noise Prediction for Complex HVAC Systems," SAE Technical Paper 2018-01-1515, 2018, https://doi.org/10.4271/2018-01-1515.
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