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HVAC System Noise Prediction through CFD Simulation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 09, 2019 by SAE International in United States
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Vehicles with Heating, Ventilation and Air Conditioning (HVAC) system have shown growing demand for in-cabin acoustic comfort in recent days. This is mainly due to advancement in new generation quieter powertrains and improved cabin sealing which has made HVAC system noise more dominant inside the cabin. HVAC system noise is predominantly flow induced. Further, considering future hybrid and Electric vehicles where engine powertrain noise will be insignificant, more attention will be required for HVAC system design. Contribution of noise in the cabin from HVAC system is in the frequency range 400 Hz to 5000 Hz. The noise produced by a HVAC system is mainly due to aeroacoustics mechanisms related to the flow fluctuations due to the blower rotation and complex flow path in HVAC unit flaps, duct and vents. Air borne noise is becoming important as other noise sources reduced with advancement of material, insulation and architectural strategies. This paper discusses simulation methodology developed to predict HVAC system level noise using CAA (Computational Aeroacoustics) approach. Detached Eddy Simulation (DES) with compressibility is used to predict sound generation and propagation at different receiver locations. Design feedback for HVAC unit, ducts and vents are identified and countermeasures are suggested from this method, which resulted in noise reduction at system and thereby vehicle level. This method is found useful for design ranking, design improvements during HVAC system’s design maturation stage in vehicle. This process is validated with test, and good correlation is observed between CFD prediction and test measurements.
|Technical Paper||Automotive HVAC Noise Reduction|
|Technical Paper||Aeroacoustics Predictions of Automotive HVAC Systems|
|Technical Paper||Correlating HVAC Vehicle Interior Noise to Sub-system Measurements|
CitationKandekar, A., Nagarhalli, P., Dol, Y., Thakur, S. et al., "HVAC System Noise Prediction through CFD Simulation," SAE Technical Paper 2019-26-0210, 2019, https://doi.org/10.4271/2019-26-0210.
- Mohamud , O.M. and Johnson , P. Broadband Noise Source Models as Aeroacoustics Tools in Designing Low NVH HVAC Ducts SAE Technical Paper 2006-01-1192 2006 10.4271/2006-01-1192
- Brentner , K.S. and Farassat , F. An Analytical Comparison of the Acoustic Analogy and Kirchhoff Formulations for Moving Surfaces AIAA Journal 36 8 1998
- Mukherjee , U. , Tare , K. , and Vaidya , R.J. Design Optimization of Automotive Radiator Cooling Module Fan of Passenger Vehicle for Effective Noise Management Using CFD Technique SAE Technical Paper 2017-26-0183 2017 10.4271/2017-26-0183
- Aissaoui , A. , Tupake , R. , Bijwe , V. , Meskine , M. et al. Flow-Induced Noise Optimization of SUV HVAC System using a Lattice Boltzmann Method SAE Technical Paper 2015-01-2323 2015 10.4271/2015-01-2323
- Sandhu , K. Prediction of Noise in HVAC Ducts CFD International Conference 2008
- Ayar , A. , Ambs , R. , Capellmann , C. , Schillemeit , B. et al. Prediction of Flow-Induced Noise in Automotive HVAC Systems Using a Combined CFD/CA Approach SAE Technical Paper 2005-01-0509 2005 10.4271/2005-01-0509
- Tautz , M. , Kaltenbacher , M. , and Becker , S. Numerical Aeroacoustic Noise Prediction for Complex HVAC Systems SAE Technical Paper 2018-01-1515 2018 10.4271/2018-01-1515