Flow characteristics and noise reduction effects of air cleaners of automobile intake systems with built-in resonators with space efficiency
Abstract
In an automobile, an intake system refers to an overall system in which air is sucked from the outside to reach the engine. However, in this intake system, noise is generated due to various reasons, which is called intake noise. The Helmholtz resonator is mainly used to suppress noise in the intake system. But there is a disadvantage that the resonator is considerably increased in order to use the resonator in accordance with the low frequency band of the main region of the intake noise. Therefore, in the engine room, which is of limited space, there is a problem such that taking up space is increased and the space efficiency is lowered. In this paper, we propose air cleaner equipped with a resonator in a specific space of air cleaner, which is one of the bulkiest parts of the intake system, and analyze the pressure drop effect and the transmission loss performance of the resonator through flow analysis. The air cleaner with a built-in resonator had almost no difference in pressure drop from the conventional air cleaner, and the noise reduction effect was also able to function as a resonator at 160Hz at 61dB
References
Tetsushi Suzuki & Fumihiko Kayaba, 1990. The analysis and mechanism of engine Intake Rumbling Noise, SAE 901755
M. C. Brands, 1979. Helmholtz Tuned Induction System for Turbocharged Diesel Engine in 1979 Automotive Engineering Congress and Exposition.
M. S. Kim, S. D. Kang and J. W. Lee, 2006. Reduction intake noise by resonator tuning, The Korean Society of Automotive Engineers, Annual autumn seminar, pp. 1767-1772.
S. K. Tang, 2005. On the Helmholtz Resonators with Tapered Necks, Journal of Sound and Vibration, Vol. 279, pp.1085-1096.
J. Lee, 2009. Effect of Leakage on the Noise Reduction Characteristics of Helmholtz Resonator, Korean Society for Noise and Vibration Engineering, Vol. 19, No. 6, pp. 634-640.
S. H. Kim, K. J. Lee and W. S. Lee, 2014. Research for Reduction Frequency characteristic of perforated resonator about Length of Extended Neck, The Korean Society of Propulsion Engineer, Annual spring seminar, pp. 342-347.
S. Kitahara, H. Takao, T. Hashimoto, S. Hatano, 2005. Improvement of Car Interior Noise by Utilizing a Porous Intake Duct: Treatment Effect on an Intake System, SAE Noise and Vibration Conference and Exhibition.
H. Y. Song and D. H. Lee, 2008. A Study in the Acoustic Absorption Performance of a Helmholtz Resonator, Korean Society for Noise and Vibration Engineering, Vol. 18, No. 1, pp. 71-79.
S. Allam, 2015. Low Noise Intake System Development for Turbocharged I.C. Engines Using Compact High Frequency Side Branch Resonators, Advances in Powertrains and Automotive, Vol.1, No.1, pp.12-23.
U. Patil and D. Rahane, 2019. Design, Simulation & Optimization of an Air Intake System to Reduce Induction Noise,” in Symposium on International Automotive Technology.
J. E. Kim, 2015. Helmholtz resonator, Korean Society for Noise and Vibration Engineering, Vol. 25, No. 6, pp. 24-28.
J. G. Ih, H. J. Kim, S. H. Lee, K. Shinoda, 2009. Prediction of intake noise of an automotive engine in run-up condition”, Applied Acoustics, Vol.70, pp.347-355.
Y. Elnemr, 2011. Acoustic Modeling and Testing of exhaust and intake system components, KTH Royal Institute of Technology, p. 94.
D. T. Hong, B. K. Son Y. H. Kim, T. B. Kim and J. M. Kang, 2010. A Study on the Development of the Perforated Resonator of Air Induction System for Small Vehicle, The Korean Society of Automotive Engineers, Annual autumn seminar, pp. 2365-2369.
A.S. Phulpagar and N.S Gohel, 2015. CFD Analysis of Air Intake System, International Journal on Theoretical and Applied Research in Mechanical Engineering, 2015, Vol. 4, No. 2, pp. 45-48.
V. Vaidya, P.P. Hujare, 2014. Effect of Resonator on Transmission Loss and Sound Pressure Level of an Air Intake System, International Journal of Engineering and Advanced Technology, Vol.3, No.3, pp.349-351
B.M. Yang, H.M. Cho, 2016. “Flow Analysis of Air Intake Duct for Noise Reduction in Automobile”, Contemporary Engineering Sciences, Vol.9, No.20, pp.989-995
