This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Acoustic Performance Analysis of Automotive HVAC Duct Designs Using a Lattice-Boltzmann Based Method and Correlation with Hemi-Anechoic Chamber
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
Annotation ability available
Acoustic comfort of automotive cabins has progressively become one of the key attributes of passenger comfort within vehicle design. Wind noise and the heating, ventilation, and air conditioning (HVAC) system noise are two of the key contributors to noise levels heard inside the car. The increasing prevalence of hybrid technologies and electrification has an associated reduction in powertrain noise levels. As such, the industry has seen an increasing focus on understanding and minimizing HVAC noise, as it is a main source of noise in the cabin particularly when the vehicle is stationary. The complex turbulent flow path through the ducts, combined with acoustic resonances can potentially lead to significant noise generation, both broadband and tonal. In order to avoid time-consuming and expensive late stage design changes, or avoid being hit by low consumer rating for ignoring the issues, it is important to identify potential problems early in the design process and take appropriate measures to rectify them. In this study, the noise characteristics of three HVAC duct designs are studied using a commercial Computational Fluid Dynamics (CFD) code based on the Lattice-Boltzmann method. The noise spectra for each duct is predicted using simulation tools, and the ducts are ranked in terms of their overall noise levels. The predicted spectra are shown to have good correlation with experimental results measured in a hemi-anechoic chamber in addition to the rankings being properly ordered. The noise generating flow mechanisms for each duct are identified using a proprietary patented flow noise source detection method.
CitationPasupuleti, S., Horne, K., Beedy, J., Guzman, A. et al., "Acoustic Performance Analysis of Automotive HVAC Duct Designs Using a Lattice-Boltzmann Based Method and Correlation with Hemi-Anechoic Chamber," SAE Technical Paper 2020-01-1263, 2020, https://doi.org/10.4271/2020-01-1263.
- Aissaoui, A., Tupake, R.S., Bijwe, V., Meskine, M. et al. , “Flow-Induced Noise Optimization of SUV HVAC System Using a Lattice Boltzmann Method,” SAE International Journal of Passenger Cars-Mechanical Systems 8:1053-1062, 2015, https://doi.org/10.4271/2015-01-2323.
- Perot, F., Kim, M.S., Freed, D., Lee, D., Ih, K.D., Ih, K.D., and Kim, M.S. , “Direct Aeroacoustics Prediction of Ducts and Vents Noise,” in 16th AIAA/CEAS Aeroacoustics Conference, 2010.
- Perot, F., Meskine, M., Vergne, S. and Gille, F. , “Aeroacoustics Prediction of Simplified and Production Automotive HVAC Ducts and Registers,” in 17th AIAA/CEAS Aeroacoustics Conference (32nd AIAA Aeroacoustics Conference), 2011.
- Perot, F., Meskine, M., and Ocker, J. , “Direct Flow-Induced Noise Prediction of a Simplified HVAC Duct Using a Lattice Boltzmann Method,” in 19th AIAA/CEAS Aeroacoustics Conference, 2013.
- Perot, F., Meskine, M., LeGoff, V., Vidal, V., Gille, F., Vergne, S., and Dupuy, F. , “HVAC Noise Predictions Using a Lattice Boltzmann Method,” in 19th AIAA/CEAS Aeroacoustics Conference, 2013.
- Bhatnagar, P., Gross, E., and Krook, M. , “A Model for Collision Processes in Gases. I. Small Amplitude Processes in Charged and Neutral One-Component System,” Phs. Rev. 94:511-525, 1954.
- Chen, H. , “Volumetric Formulation of the Lattice Boltzmann Method for Fluid Dynamics: Basic Concept,” Phys. Rev. E 58:3955-3963, 1998.
- Chen, H., Orszag, S., Staroselsky, I., and Succi, S. , “Expanded Analogy between Boltzmann Kinetic Theory of Fluid and Turbulence,” J. Fluid Mech. 519:301-314, 2004.
- Chen, H., Kandasamy, S., Orszag, S., Shock, R. et al. , “Extended Boltzmann Kinetic Method For Turbulent Flows,” Science 301:633-636, 2003.
- Chen, H., Teixeira, C., and Molvig, K. , “Realization of Fluid Boundary Conditions via Discrete Boltzmann Dynamics,” Intl. J. Mod. Phys. C 9(8):1281-1292, 1998.
- Shan, X. and Chen, H. , “Lattice Boltzmann Model for Simulating Flows with Multiple Phases and Components,” Phys. Rev. E 47:1815-1819, 1983.
- Senthooran, S., Crouse, B., Balasubramanian, G., Freed, D., Shin, S.R., and Ih, K.D. , “Effect of Surface Mounted Microphones on Automobile Side Glass Pressure,” in Proc. 7th MIRA Intl. Vehicle Aerodynamics Conf., Ricoh Arena, UK, 2008.
- Crouse, B., Balasubramanian, G., Freed, D., Shin, S.R., and Ih, K.D. , “Investigation of Gap Deflector Efficiency forReduction of Sunroof Buffeting,” SAE Technical Paper 2009-01-2233, 2009, https://doi.org/10.4271/2009-01-2233.
- Biermann, J., Mann, A., Neuhierl, B., and Kim, M. , “Digital Aeroacoustics Design Method of Climate Systems for Improved Cabin Comfort,” SAE Technical Paper 2017-01-1787, 2017, https://doi.org/10.4271/2017-01-1787.
- Perot, F., Kim, M., Le Goff, V., Carniel, X., Goth, Y., and Chassaignon, C. , “Numerical Optimization of the Tonal Noise of a Centrifugal Fan Using a Flow Obstruction,” in Fan2012 International Conference, Senlis, France, 2012.
- Nardari, C., Mann, A., and Schindele, T. , “Exhaust and Muffler Aeroacoustic Predictions Using Lattice Boltzmann Method,” SAE Technical Paper 2018-01-1287, 2018, https://doi.org/10.4271/2018-01-1287.
- Powell, A. , “Theory of Vortex Sound,” Journal of the Acoustical Society of America 36(1):177-195, 1964.