Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics

Randy Amuaku; Eric Amoah Asante; Ampaw Edward; George Bright Gyamfi

doi:doi:10.11648/j.aas.20190406.11

| Peer-Reviewed

Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics

Randy Amuaku, Eric Amoah Asante, Ampaw Edward, George Bright Gyamfi

Published in Advances in Applied Sciences (Volume 4, Issue 6)

Received: 5 October 2019 Accepted: 13 November 2019 Published: 10 December 2019

Views: Downloads:

Download PDF

Share This Article

Twitter
Linked In
Facebook

Abstract

Confronted with noise disturbance during transmission of vehicle exhaust air, several mufflers have been designed to control the noise and improve the transmission characteristics. In order to optimize the noise control and attenuation quality, the internal geometry, inlet and outlet pipe diameters of a designed muffler were varied and the performance evaluated using finite element method (FEM). Furthermore, 2mm diameter equal circular perforations were introduced in the resonator chamber to verify the effect on the transmission loss characteristics. The results show that the performance of the muffler with inlet pipe diameter variation is significantly better (68dB) than the standard muffler (55dB) in controlling and reducing acoustic wave propagation within the same frequency range of (200~580Hz). The performance improved further to 70 dB by the introduction of circular perforations in resonator chamber. However, with the variation in the outlet diameter increase the performance of the muffler was 55dB but within a higher frequency range of 220~680Hz which is not reliable for acoustic wave propagation control. The average transmission loss performance of the designed mufflers were 48.62, 47.77, 39.01 and 37.77dB for the resonator chamber perforation, inlet pipe diameter increase, outlet pipe diameter increase and standard muffler respectively. Therefore, the designed muffler with resonator chamber perforations is the best for optimal acoustic wave control.

Published in	Advances in Applied Sciences (Volume 4, Issue 6)
DOI	10.11648/j.aas.20190406.11
Page(s)	104-109
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

Finite Element Method (FEM), Transmission Loss Characteristics (TL), Resonator Chamber Perforations, Boundary Element Method (BEM)

References

[1]	Žiaran, S. and O. Chlebo, Noise control transmission methods of the combustion engine by means of reduction of the vibration. Archives of Acoustics, 2016. 41 (2): p. 277-284.
[2]	Hong, O., et al., Understanding and preventing noise-induced hearing loss. Dis Mon, 2013. 59 (4): p. 110-118.
[3]	Lee, J., et al., Behavioral hearing thresholds between 0.125 and 20 kHz using depth-compensated ear simulator calibration. Ear and hearing, 2012. 33 (3): p. 315.
[4]	Chen, Y. and D. Xu. Optimization of Noise Reduction Performance for the Muffler in a Heavy Vehicle. in IOP Conference Series: Materials Science and Engineering. 2018. IOP Publishing.
[5]	Sánchez-Orgaz, E., et al., Numerical mode matching for sound propagation in silencers with granular material. Journal of Computational and Applied Mathematics, 2019. 350: p. 233-246.
[6]	Brebbia, C. A., J. C. F. Telles, and L. C. Wrobel, Boundary element techniques: theory and applications in engineering. 2012: Springer Science & Business Media.
[7]	Parlar, Z., et al., Acoustic and flow field analysis of a perforated muffler design. World Academy of Science, Engineering and Technology, 2013. 7: p. 03-27.
[8]	Kulkarni, M. V. and R. B. Ingle, Attenuation analysis and acoustic pressure levels for double expansion chamber reactive muffler: Part 2. Noise & Vibration Worldwide, 2018. 49 (6): p. 241-245.
[9]	Potente, D. General design principles for an automotive muffler. in Proceedings of ACOUSTICS. 2005.
[10]	Berger, E., Methods of measuring the attenuation of hearing protection devices. The Journal of the Acoustical Society of America, 1986. 79 (6): p. 1655-1687.
[11]	Shu, G., et al., Configuration optimization of the segmented modules in an exhaust-based thermoelectric generator for engine waste heat recovery. Energy, 2018. 160: p. 612-624.
[12]	Goldsborough, S. S. and P. Van Blarigan, Optimizing the scavenging system for a two-stroke cycle, free piston engine for high efficiency and low emissions: A computational approach. SAE transactions, 2003: p. 1-20.
[13]	Yu, X., et al., Sub-chamber optimization for silencer design. Journal of sound and vibration, 2015. 351: p. 57-67.
[14]	Yu, X., Modeling, analysis, and optimization of complex vibroacoustic systems with micro-perforates. 2016, The Hong Kong Polytechnic University.
[15]	Jena, D. and S. Panigrahi, Numerically estimating acoustic transmission loss of a reactive muffler with and without mean flow. Measurement, 2017. 109: p. 168-186.
[16]	Dupré, M., et al., Layer potential approach for fast eigenvalue characterization of the Helmholtz equation with mixed boundary conditions. Computational and Applied Mathematics, 2018. 37 (4): p. 4675-4685.
[17]	Andersen, P. R., Modelling of acoustic viscothermal losses using the Boundary Element Method: From method to optimization. 2018.
[18]	Puthuparampil, J., Aeroacoustic Noise Prediction and Acoustic Optimization of Mufflers. 2018.
[19]	El Malki, M. and A. Khettabi. Application of the interface response theory to a periodical expansion chambers. in AIP Conference Proceedings. 2019. AIP Publishing.
[20]	Bhadke, P. and K. J. I. J. M. C. E. Mahajan, no. March, Effect of Change in Diameter on Muffler Transmission loss using COMSOL. 2017: p. 2278-1684.
[21]	Elsayed, A., et al., Investigation of baffle configuration effect on the performance of exhaust mufflers. 2017. 10: p. 86-94.

Cite This Article

Plain Text BibTeX RIS

APA Style

Randy Amuaku, Eric Amoah Asante, Ampaw Edward, George Bright Gyamfi. (2019). Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics. Advances in Applied Sciences, 4(6), 104-109. https://doi.org/10.11648/j.aas.20190406.11

Copy | Download

ACS Style

Randy Amuaku; Eric Amoah Asante; Ampaw Edward; George Bright Gyamfi. Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics. Adv. Appl. Sci. 2019, 4(6), 104-109. doi: 10.11648/j.aas.20190406.11

Copy | Download

AMA Style

Randy Amuaku, Eric Amoah Asante, Ampaw Edward, George Bright Gyamfi. Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics. Adv Appl Sci. 2019;4(6):104-109. doi: 10.11648/j.aas.20190406.11

Copy | Download

@article{10.11648/j.aas.20190406.11,
  author = {Randy Amuaku and Eric Amoah Asante and Ampaw Edward and George Bright Gyamfi},
  title = {Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics},
  journal = {Advances in Applied Sciences},
  volume = {4},
  number = {6},
  pages = {104-109},
  doi = {10.11648/j.aas.20190406.11},
  url = {https://doi.org/10.11648/j.aas.20190406.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.aas.20190406.11},
  abstract = {Confronted with noise disturbance during transmission of vehicle exhaust air, several mufflers have been designed to control the noise and improve the transmission characteristics. In order to optimize the noise control and attenuation quality, the internal geometry, inlet and outlet pipe diameters of a designed muffler were varied and the performance evaluated using finite element method (FEM). Furthermore, 2mm diameter equal circular perforations were introduced in the resonator chamber to verify the effect on the transmission loss characteristics. The results show that the performance of the muffler with inlet pipe diameter variation is significantly better (68dB) than the standard muffler (55dB) in controlling and reducing acoustic wave propagation within the same frequency range of (200~580Hz). The performance improved further to 70 dB by the introduction of circular perforations in resonator chamber. However, with the variation in the outlet diameter increase the performance of the muffler was 55dB but within a higher frequency range of 220~680Hz which is not reliable for acoustic wave propagation control. The average transmission loss performance of the designed mufflers were 48.62, 47.77, 39.01 and 37.77dB for the resonator chamber perforation, inlet pipe diameter increase, outlet pipe diameter increase and standard muffler respectively. Therefore, the designed muffler with resonator chamber perforations is the best for optimal acoustic wave control.},
 year = {2019}
}

Copy | Download

TY  - JOUR
T1  - Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics
AU  - Randy Amuaku
AU  - Eric Amoah Asante
AU  - Ampaw Edward
AU  - George Bright Gyamfi
Y1  - 2019/12/10
PY  - 2019
N1  - https://doi.org/10.11648/j.aas.20190406.11
DO  - 10.11648/j.aas.20190406.11
T2  - Advances in Applied Sciences
JF  - Advances in Applied Sciences
JO  - Advances in Applied Sciences
SP  - 104
EP  - 109
PB  - Science Publishing Group
SN  - 2575-1514
UR  - https://doi.org/10.11648/j.aas.20190406.11
AB  - Confronted with noise disturbance during transmission of vehicle exhaust air, several mufflers have been designed to control the noise and improve the transmission characteristics. In order to optimize the noise control and attenuation quality, the internal geometry, inlet and outlet pipe diameters of a designed muffler were varied and the performance evaluated using finite element method (FEM). Furthermore, 2mm diameter equal circular perforations were introduced in the resonator chamber to verify the effect on the transmission loss characteristics. The results show that the performance of the muffler with inlet pipe diameter variation is significantly better (68dB) than the standard muffler (55dB) in controlling and reducing acoustic wave propagation within the same frequency range of (200~580Hz). The performance improved further to 70 dB by the introduction of circular perforations in resonator chamber. However, with the variation in the outlet diameter increase the performance of the muffler was 55dB but within a higher frequency range of 220~680Hz which is not reliable for acoustic wave propagation control. The average transmission loss performance of the designed mufflers were 48.62, 47.77, 39.01 and 37.77dB for the resonator chamber perforation, inlet pipe diameter increase, outlet pipe diameter increase and standard muffler respectively. Therefore, the designed muffler with resonator chamber perforations is the best for optimal acoustic wave control.
VL  - 4
IS  - 6
ER  -

Copy | Download

Author Information

Randy Amuaku

Mechanical Engineering Department, Faculty of Engineering, Koforidua Technical University, Koforidua, Ghana
Eric Amoah Asante

Mechanical Engineering Department, Faculty of Engineering, Koforidua Technical University, Koforidua, Ghana
Ampaw Edward

Mechanical Engineering Department, Faculty of Engineering, Koforidua Technical University, Koforidua, Ghana
George Bright Gyamfi

Automotive Engineering Department, Faculty of Engineering, Koforidua Technical University, Koforidua, Ghana

Download PDF

Sections

Plain Text BibTeX RIS

APA Style

Randy Amuaku, Eric Amoah Asante, Ampaw Edward, George Bright Gyamfi. (2019). Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics. Advances in Applied Sciences, 4(6), 104-109. https://doi.org/10.11648/j.aas.20190406.11

Copy | Download

ACS Style

Randy Amuaku; Eric Amoah Asante; Ampaw Edward; George Bright Gyamfi. Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics. Adv. Appl. Sci. 2019, 4(6), 104-109. doi: 10.11648/j.aas.20190406.11

Copy | Download

AMA Style

Randy Amuaku, Eric Amoah Asante, Ampaw Edward, George Bright Gyamfi. Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics. Adv Appl Sci. 2019;4(6):104-109. doi: 10.11648/j.aas.20190406.11

Copy | Download

@article{10.11648/j.aas.20190406.11,
  author = {Randy Amuaku and Eric Amoah Asante and Ampaw Edward and George Bright Gyamfi},
  title = {Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics},
  journal = {Advances in Applied Sciences},
  volume = {4},
  number = {6},
  pages = {104-109},
  doi = {10.11648/j.aas.20190406.11},
  url = {https://doi.org/10.11648/j.aas.20190406.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.aas.20190406.11},
  abstract = {Confronted with noise disturbance during transmission of vehicle exhaust air, several mufflers have been designed to control the noise and improve the transmission characteristics. In order to optimize the noise control and attenuation quality, the internal geometry, inlet and outlet pipe diameters of a designed muffler were varied and the performance evaluated using finite element method (FEM). Furthermore, 2mm diameter equal circular perforations were introduced in the resonator chamber to verify the effect on the transmission loss characteristics. The results show that the performance of the muffler with inlet pipe diameter variation is significantly better (68dB) than the standard muffler (55dB) in controlling and reducing acoustic wave propagation within the same frequency range of (200~580Hz). The performance improved further to 70 dB by the introduction of circular perforations in resonator chamber. However, with the variation in the outlet diameter increase the performance of the muffler was 55dB but within a higher frequency range of 220~680Hz which is not reliable for acoustic wave propagation control. The average transmission loss performance of the designed mufflers were 48.62, 47.77, 39.01 and 37.77dB for the resonator chamber perforation, inlet pipe diameter increase, outlet pipe diameter increase and standard muffler respectively. Therefore, the designed muffler with resonator chamber perforations is the best for optimal acoustic wave control.},
 year = {2019}
}

Copy | Download

TY  - JOUR
T1  - Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics
AU  - Randy Amuaku
AU  - Eric Amoah Asante
AU  - Ampaw Edward
AU  - George Bright Gyamfi
Y1  - 2019/12/10
PY  - 2019
N1  - https://doi.org/10.11648/j.aas.20190406.11
DO  - 10.11648/j.aas.20190406.11
T2  - Advances in Applied Sciences
JF  - Advances in Applied Sciences
JO  - Advances in Applied Sciences
SP  - 104
EP  - 109
PB  - Science Publishing Group
SN  - 2575-1514
UR  - https://doi.org/10.11648/j.aas.20190406.11
AB  - Confronted with noise disturbance during transmission of vehicle exhaust air, several mufflers have been designed to control the noise and improve the transmission characteristics. In order to optimize the noise control and attenuation quality, the internal geometry, inlet and outlet pipe diameters of a designed muffler were varied and the performance evaluated using finite element method (FEM). Furthermore, 2mm diameter equal circular perforations were introduced in the resonator chamber to verify the effect on the transmission loss characteristics. The results show that the performance of the muffler with inlet pipe diameter variation is significantly better (68dB) than the standard muffler (55dB) in controlling and reducing acoustic wave propagation within the same frequency range of (200~580Hz). The performance improved further to 70 dB by the introduction of circular perforations in resonator chamber. However, with the variation in the outlet diameter increase the performance of the muffler was 55dB but within a higher frequency range of 220~680Hz which is not reliable for acoustic wave propagation control. The average transmission loss performance of the designed mufflers were 48.62, 47.77, 39.01 and 37.77dB for the resonator chamber perforation, inlet pipe diameter increase, outlet pipe diameter increase and standard muffler respectively. Therefore, the designed muffler with resonator chamber perforations is the best for optimal acoustic wave control.
VL  - 4
IS  - 6
ER  -

Copy | Download