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In-Duct Acoustic Source Data for Roots Blowers
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 05, 2017 by SAE International in United States
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Increased demands for reduction of fuel consumption and CO2 emissions are driven by the global warming. To meet these challenges with respect to the passenger car segment the strategy of utilizing IC-engine downsizing has shown to be effective. In order to additionally meet requirements for high power and torque output supercharging is required. This can be realized using e.g. turbo-chargers, roots blowers or a combination of several such devices for the highest specific power segment. Both turbo-chargers and roots blowers can be strong sources of sound depending on the operating conditions and extensive NVH abatements such as resonators and encapsulation might be required to achieve superior vehicle NVH. For an efficient resonator tuning process in-duct acoustic source data is required. No published studies exists that describe how the gas exchange process for roots blowers can be described by acoustic sources in the frequency domain. This paper presents an experimental study that aims to investigate if a linear time invariant acoustic 1-port model can represent the in-duct sound source of a roots blower in- and outlet. Different operating conditions are investigated for a wide rotation speed range. The results show that it is possible to use a linear acoustic source model to represent a roots blower and that sound predictions can be performed with good accuracy.
CitationKnutsson, M., Kjellson, E., Glover, R., and Boden, H., "In-Duct Acoustic Source Data for Roots Blowers," SAE Technical Paper 2017-01-1792, 2017, https://doi.org/10.4271/2017-01-1792.
- Crabb, D., Fleiss, M., Larsson, J. -E., and Somhorst, J., "New Modular Engine Platform from Volvo,” MTZ worldwide Vol 74, 2013.
- Fleiss, M., Crabb, D., Larsson, J. -E., Somhorst, J., et al., ” VEA - Volvo Engine Architecture: Extreme Downsizing and Maximum Commonality while Maintaining Highly Competitive Customer Attributes, Proceedings of the 22nd Aachen Colloquium Automobile and Engine Technology, Aachen, 2013.
- Ansdale, R., "A Reconnaissance of Supercharging Technology 1902-1980," SAE Technical Paper 810003, 1981, doi:10.4271/810003.
- London Gazette, November 12, 1859, page 6052.
- Swartzlander, M. J., “Performance Improvement of the Roots Supercharger through Optimization of Rotor Helix Angle and Port Geometry”, Proceedings of the 11th Supercharging Conference, Dresden, 2006.
- Crocker, M. J., Handbook of Noise and Vibration Control, ISBN 978-0-471-39599-7, John Wiley & Sons, Inc., 2007.
- Sturesson, P. -O., Knutsson, M., Burenius, R., Stienen, R., et al., “NVH Optimisation of a Roots Type Blower for a Twin Charger DI Gasoline Engine”, Proceedings of the Aachen Acoustic Colloquium, Aachen, 2014.
- Huang, P., "Pulsation Generation and Control of Roots Supercharger: A Shock Tube Mechanism," SAE Technical Paper 2013-01-1887, 2013, doi:10.4271/2013-01-1887.
- Froehlich, M. and Stewart, N., "TVS® V-Series Supercharger Development for Single and Compound Boosted Engines," SAE Technical Paper 2013-01-0919, 2013, doi:10.4271/2013-01-0919.
- Shah, A., Lennström, D., Sturesson, P., and Easterling, W., "NVH Integration of Twin Charger Direct Injected Gasoline Engine," SAE Int. J. Passeng. Cars - Mech. Syst. 7(3):1221-1228, 2014, doi:10.4271/2014-01-2087.
- Burenius, R., “Using 1D Simulations to Optimize a Supercharger for a Twin Charged DI Gasoline Engine,” Proceedings of the IAV 2nd Conference of Engine Processes, pp. 372-383, Berlin, 2015
- Brynych, P., Macek, J., Vitek, O., and Cervenka, L., "1-D Model of Roots Type Supercharger," SAE Technical Paper 2013-01-0927, 2013, doi:10.4271/2013-01-0927.
- Munjal, M. L., “Acoustics of Ducts and Mufflers with Application to Exhaust and Ventilation System Design,” Wiley, New York, 1987.
- Bodén, H., Åbom, M., “Modelling of Fluid Machines as Sources of Sound in Duct and Pipe System”, Acta Acustica, 3:549-560, 1995.
- Bodén, H., Albertsson, F., “Linearity Tests for In-duct Acoustic One-port Sources”, Journal of Sound and Vibration, 237(1):45-65, 2000, doi:10.1006/jsvi.2000.3034.
- Chung, J. Y., Blaser, D. A., “Transfer Function Method of Measuring In-Duct Acoustic Properties I. Theory,” Journal of the Acoustical Society of America, 68:907-913, 1980, doi:10.1121/1.384779.
- Bodén, H., Åbom, M., “Influence of Errors on the Two-Microphone Method for Measuring Acoustic Properties in Ducts,” Journal of the Acoustical Society of America, 79(2):519-549, 1986, doi:10.1121/1.393542.
- Åbom, M., Bodén, H., “Error Analysis of Two-Microphone Measurements in Ducts with Flow,” Journal of the Acoustical Society of America, 83(6):2429-2438, 1988, doi:10.1121/1.396322.
- Knutsson, M. and Bodén, H., "IC-Engine Intake Acoustic Source Data from Non-Linear Simulations," SAE Technical Paper 2007-01-2209, 2007, doi:10.4271/2007-01-2209.
- Ouwenga, D., Hopkins, J., and Swartzlander, M., “TVS2 Technology: Improving Supercharger Efficiency and Capability”, Proceedings of the 20th Supercharging Conference, Dresden, 2015.