A study on flow induct noise of a muffler based on a LES/Morhing method

PDF(1923 KB)

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (24) : 162-168.

MENG Qingyu,JI Zhenlin

Author information +

History +

Abstract

The airflow generated noise inside a simple expansion chamber muffler is predicted by combining Large Eddy Simulation (LES) and Morhing acoustic analogy in the present work, and the good agreement is observed between the predictions and measurements. Research indicates that wall pressure fluctuations are dominated by hydrodynamic pressure fluctuations within the distance of three pipe diameters in the outlet pipe, and wall pressure fluctuations beyond the distance of six pipe diameters downstream are dominated by sound pressure fluctuations. The airflow generated noise is mainly attributed to the vortex generated by structural change in the muffler. The strong influences at the longitudinal resonance frequency and antiresonance frequency of the expansion chamber are observed.

Key words

muffler / flow induct noise / large eddy simulation / acoustic analogy

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

MENG Qingyu, JI Zhenlin. A study on flow induct noise of a muffler based on a LES/Morhing method[J]. Journal of Vibration and Shock, 2024, 43(24): 162-168

References

[1] 季振林. 消声器声学理论与设计[M]. 北京: 科学出版社, 2015.
[2] Luck P, Boij S, Bodén H. Experimental investigation of the aero-acoustic interaction at an area-expansion[J]. Journal of Sound and Vibration, 2019, 457: 197-211.
[3] English E J, Holland K R. Aeroacoustic sound generation in simple expansion chambers[J]. The Journal of the Acoustical Society of America, 2010, 128(5): 2589-2595.
[4] TAKASHI E. Noise source characteristics in muffler tail pipes with pulsating flow［C］∥ 5th International Conference on Independent Component Analysis and Blind Signal Separation. Granada: ICA 2004-Ⅱ, 2004.
[5] 赵海军,邓兆祥,李沛然.穿孔管式消声单元气流再生噪声总功率模型[J]. 振动与冲击, 2011, 30(08): 118-122.
Zhao Hai-jun, Deng Zhao-xiang, Li Pei-ran. Total power model of airflow regeneration noise of perforated tube silencing unit [J]. Vibration and Shock, 2011, 30 (08): 118-122.
[6] Ganta N, Mahato B, Bhumkar Y G. Prediction of the aerodynamic sound generated due to flow over a cylinder performing combined steady rotation and rotary oscillations[J]. The Journal of the Acoustical Society of America, 2020, 147(1): 325-226.
[7] Kazuya K, Kazutoyo Y, Masato F. Aeroacoustic simulation of broadband sound generated from low-Mach-number flows using a lattice Boltzmann method[J]. Journal of Sound and Vibration, 2020, 467: 115044.
[8] Han T, Wang L, Cen K, et al. Flow-induced noise analysis for natural gas manifolds using LES and FW-H hybrid method[J]. Applied Acoustics, 2020, 159: 107101.
[9] Suresh T, Szulc O, Flaszynski P. Aeroacoustic analysis based on FW-H analogy to predict low-frequency in-plane harmonic noise of a helicopter rotor in hover[J]. Archives of Mechanics, 2022, 74(2-3): 201-246.
[10] Wang ZY, Huang J, Yi MX. Acoustic scattering effect prediction of helicopter fuselage based on BEM and convective FW-H equation[J]. Acta Acustica, 2022, 6: 24.
[11] Freidhager C, Schoder S, Maurerlehner P,et al. Applicability of two hybrid sound prediction methods for assessing in-duct sound absorbers of turbocharger compressors[J]. Acta Acustica, 2022, 6: 37.
[12] Lighthill M J. On sound generated aerodynamically II. Turbulence as a source of sound. Proceedings of the Royal Society of London. Series A[J]. Mathematical and Physical Sciences, 1954, 222(1148): 1-32.
[13] 刘海涛.消声器膨胀腔气流再生噪声产生机理及抑制研究[J]. 振动与冲击, 2019, 38(16): 192-199.
Liu Hai-tao. Research on the mechanism and suppression of air flow regeneration noise in the expansion chamber of a silencer[J]. Journal of vibration and shock, 2019, 38(16): 192-199.
[14] Dong L, Lin JW, Liu HL, et al. Simplified calculation method for hydrodynamic noise of multi-tube heat exchanger based on acoustic cavity model[J]. Applied Acoustics, 2023, 207: 109335.
[15] Mohring W. A well posed acoustic analogy based on a moving acoustic medium[R]．arXiv: 1009, 3766, 1999.
[16] Shravan K, Avraham H, Vinod A, et.al. Hydrodynamic and acoustic pressure fluctuations in water pipes due to an orifice: Comparison of measurements with Large Eddy Simulations[J]. Journal of Sound and Vibration, 2022, 529: 116882.
[17] Kolmogorov A N. The Local Structure of Turbulence in Incompressible Viscous Fluid for Very Large Reynolds Numbers[J]. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 1991, 434(1890): 9-13.
[18] Zhao S, Cheng E, Qiu X, Burnett I, Liu J C. Pressure spectra in turbulent flows in the inertial and the dissipation ranges[J]. The Journal of the Acoustical Society of America, 2016, 140(6): 4178-4182.
[19] George W K, Beuther P D, Arndt R E A. Pressure spectra in turbulent free shear flows[J]. Journal of Fluid Mechanics, 1984, 148(-1): 155.
[20] Chen ZX, Ji ZL, Huang HP. Acoustic impedance of perforated plates in the presence of bias flow[J]. Journal of Sound and Vibration, 2019, 446: 159-175.
[21] 吕景伟. 变截面管道内流噪声预报与试验测量研究[D]. 哈尔滨工程大学, 2011.
[22] 张斌. 大涡模拟滤波网格分析及网格自适应控制研究与应用[D]. 上海交通大学, 2011.
[23] Shan F, Fujishiro A, Tsuneyoshi T. Particle image velocimetry measurements of flow field behind a circular square-edged orifice in a round pipe[J]. Experiments in Fluids, 2013, 54: 1553.
[24] 季梦,尤云祥,韩盼盼,等.亚临界区圆柱绕流相干结构壁面模化混合RANS/LES模型[J].物理学报,2024,73(05):196-222.
JI Meng,YOU Yunxiang,HAN Panpan,et al.A wall-modeled hybrid RANS/LES model for flow around circular cylinder with coherent structures in subcritical Reynolds number regions[J].ActaPhysica Sinica,2024,73(05):196-222.
[25] Liu H L, Dai H W，Ding J, et al. Numerical and experimental studies of hydraulic noise induced by surface dipole sources in a centrifugal pump[J]. Journal of Hydrodynamics, 2016, 28(1):43-51.