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Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers

Received: 27 August 2016     Accepted: 2 November 2016     Published: 25 November 2016
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Abstract

The reduction of the emitted noise pollution from the exhaust system of engines is a real challenge for various industries. At this regard, mufflers have been used to reduce the transmitted noise from the engine of vehicles into the surrounding environment. Mufflers are designed to reflect the sound waves produced by the engine in such a way that they partially cancel themselves out. Noise transmission loss performance in muffler depends on its geometry. Therefore, maximization of noise transmission loss in mufflers using shape modification concept is an important research area. In this paper research, maximization of noise transmission in mufflers is studied and investigated. A model is developed to present the absorptive muffler. The muffler structure and its sound absorbing layer are modeled using shells elements. This model analyzes the muffler structure which has effects on the transmission loss (TL). The results are compared to a model without any absorbing layer. It indicates that the thickness and material type of absorbing layer have distinctive effects on the amount of noise transmission loss of muffler over a wide frequency range.

Published in Mathematical Modelling and Applications (Volume 1, Issue 2)
DOI 10.11648/j.mma.20160102.13
Page(s) 46-54
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), 2016. Published by Science Publishing Group

Keywords

Absorptive Muffler, Noise Transmission Loss, Sound Absorbing Material, Shell

References
[1] Jebasinski, R., Absorption mufflers in exhaust systems, J. Eberspaecher GmbH and Co., 2000.
[2] Rahman, M., Sharmin, T., Hassan, A., Al Nur, A., Design and Construction of a Muffler for Engine Exhaust Noise Reduction, Proceedings of the International Conference on Mechanical Engineering 2005, (ICME2005) 28- 30 December 2005, Dhaka, Bangladesh
[3] Stewart, G. W., Acoustic waves filters, Physics Review 20, 528-551, 1922.
[4] Divis, D. D., Stokes, Jr. G. M., Morse, D., Stevens, G. L. JR., Theoretical and Experimental Investigation of Muffler with Comments on Engine- Exhaust Muffler Design, NACA 11921954
[5] Igarashi, J., Toyama, M., Aeronautical Research Institute, University of Tokyo, Report no. 339, 223-241 Fundamental of acoustical silencers (I), J. Igarashi and M. Toyama 1960 Aeronautical Research Institute, University of Tokyo, Report no. 351, 17-31 Fundamental of acoustical silencers (III)
[6] Munjal, M. L., Sreenath, A. V., Narasimhan, M. V., Velocity ratio in the analysis of linear dynamical system, Journal of sound and Vibration 26, 173-191, 1973.
[7] Munjal, M. L., Velocity ratio cum transfer matrix method for the evaluation of muffler with neon flow, Journal of sound and Vibration, 39, 105-119, 1975.
[8] Young, C. I. J., Crocker, M. J., Prediction to transmission loss in mufflers by finite element method, Journal of Acoustical society of America, 57, 144-148, 1975.
[9] S. N. Panigrahi, M. L. Munjal, 2007, A generalized scheme for analysis of multifarious commercially used mufflers, Applied Acoustics, 68, 660–681
[10] Wu, T. W, Cheng, C. Y. R, Tao, Z., Boundary element analysis of packed silencers with protective cloth and embedded thin surfaces, Journal of Sound and Vibration, Volume 261, Issue 1, 13 March 2003, 1–15
[11] Liu, J., Herrin, D. W., Enhancing micro-perforated panel attenuation by partitioning the adjoining cavity, Applied Acoustics, 71, 120–127, 2010.
[12] Yasuda, T., Wu, C., Nakagawa, N., Nagamura, K., Predictions and experimental studies of the tail pipe noise of an automotive muffler using a one dimensional CFD model, Applied Acoustics, 71, 701–707, 2010.
[13] Herrin, D. W., Ramalingam, S., Cui, Z., Liu, J., Predicting insertion loss of large duct systems above the plane wave cutoff frequency, Applied Acoustics, 73, 37–42, 2012.
[14] Herrin, D. W., Hua, X., Zhang, Y., Elnady, T., The Proper Use of Plane Wave Models for Muffler Design, SAE Int. J. Passeng. Cars - Mech. Syst., 7 (3), 927-932, 2014.
[15] Potente, D., General Design Principles for an Automotive Muffler, Proceedings of Acoustics 2005, 9-11 November 2005, Busselton, Western Australia
[16] Pierce, A. D., Acoustics: An Introduction to its Physical Principles and Applications, Mc Graw – Hill Series in Mechanical Engineering, 337- 357, 1981.
[17] Munjal, M. L., Plane Wave Analysis of Side Inlet/Outlet Chamber Mufflers with Mean Flow, Applied Acoustics, 52 (2), 165–175, 1997.
[18] Munjal, M. L., Acoustics of Ducts and Mufflers. 1st Ed., John Wiley and Sons, New York, 1987.
[19] Delany, M. E., Bazley, E. N., Acoustical properties of fibrous absorbent materials, Applied Acoustics, 3 (2), 105–116, 1970.
[20] Bies, D. A., Hansen, C. H., Flow Resistance Information for Acoustical Design, Appl. Acoust., 14, 357–391, 1980.
[21] Wu, T. W., Muffler design software (MAP), University of Kentucky, USA, 2015.
[22] Wu, T. W., A Direct Boundary Element Method for Acoustic Radiation and Scattering from Mixed Regular and Thin Bodies, J. Acoust. Soc. Am., 97, 84-91, 1995.
[23] Ranjbar, M., A Comparative Study on Optimization in Structural Acoustics, Doctoral Thesis, Technische Universität Dresden, Germany, 2011.
[24] Ranjbar, M., Boldrin, L., Scarpa, F., Niels, S., Patsias, S., Vibroacoustic optimization of anti-tetrachiral and auxetic hexagonal sandwich panels with gradient geometry, Smart Materials and Structures 25, 2016.
[25] Hussain, G., Ranjbar, M., Hassanzadeh, S., Trade-off among Mechanical Properties and Energy Consumption in Multi-pass Friction Stir Processing of Al 7075-T651 Alloy Employing Hybrid Approach of Artificial Neural Network and Genetic Algorithm, Proc IMechE Part B: J Engineering Manufacture, 2015.
[26] Ranjbar, M., Marburg, St., Hardtke, H.-J. A New Hybrid Design of Experiments Approach for Optimization in Structural Acoustics Applications, Applied Mechanics and Materials 110-116, 5015. 2012.
[27] Ranjbar, M., Kermani, M., Muffler Design by Noise Transmission Loss Maximization on Narrow Band Frequency Range, the 7th Automotive Technologies Congress (OTEKON 2014), 26-27 May 2014, Bursa, Turkey.
[28] Ranjbar, M., Kermani, M., On Maximization of Noise Transmission Loss in Mufflers by Geometry Modification Concept, ASME District F - 2013 Early Career Technical Conference, UAB, Birmingham, Alabama, November 2-3, 2013.
[29] Ranjbar, M., Marburg, St., Hardtke, H.-J. Development of a Hybrid Neural Networks Algorithm for Structural-Acoustics Optimization Applications, In Proceedings of the First International Conference of Acoustics and Vibration, 21-22 December 2011, Tehran, Iran.
[30] Ranjbar, M., Marburg, St., Hardtke, H.-J. schnelle Optimierung in der Struktur Akustik, the 37 annual meeting for Acoustics, Düsseldorf, Germany, March 21-24, 2011.
[31] Ranjbar, M., Marburg, St., Hardtke, H.-J. Ein Vergleich von Optimierungsverfahren fuer Anwendungen in der Strukturakustik, Proceedings of the 33 annual meeting for Acoustics, Stuttgart, Germany, March 19-22, 2007.
[32] Ranjbar, M., Marburg, St., Hardtke, H.-J. Study of Optimization Methods for Structural-Acoustic Applications, Proceedings of 77th Annual Meeting of the Gesellschaft für Angewandte Mathematik und Mechanik e. V., Technische Universität Berlin, Germany, March 27-31, 2006.
[33] Ranjbar, M., Marburg, St., Hardtke, H.-J. Structural-Acoustic Optimization of a Rectangular Plate: A Tabu Search Approach, Journal of Finite Elements in Analysis and Design, Vol. 50, pp. 142-146, 2012.
[34] Ranjbar, M., Hardtke, H.-J. Fritze, D., Marburg, St.. Finding the Best Design within Limited Time: A Comparative Case Study on Methods for Optimization in Structural Acoustics, Journal of Computational Acoustics, Vol. 18-2, pp. 149-164, 2010.
[35] Ranjbar, M., Marburg, St., Hardtke, H.-J. A New Hybrid Design of Experiments Approach for Optimization in Structural Acoustics Applications,” Applied Mechanics and Materials, Vols. 110-116, pp. 5015-5020, 2012.
[36] Ranjbar, M., Marburg, St., Fast Vibroacoustic optimization of mechanical structures using artificial neural networks”, International Journal of Mechanical Engineering and Applications, Vol. 1-3, pp. 64-68. 2013.
[37] Ranjbar, M., Marburg, St., Hardtke, H.-J. Vibroacoustic Optimization of Mechanical Structures: A Controlled Random Search Approach,” Advanced Material Research, Vols. 622-623, pp. 158-161. 2013.
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  • APA Style

    Mostafa Ranjbar, Maryam Alinaghi. (2016). Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers. Mathematical Modelling and Applications, 1(2), 46-54. https://doi.org/10.11648/j.mma.20160102.13

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    ACS Style

    Mostafa Ranjbar; Maryam Alinaghi. Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers. Math. Model. Appl. 2016, 1(2), 46-54. doi: 10.11648/j.mma.20160102.13

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    AMA Style

    Mostafa Ranjbar, Maryam Alinaghi. Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers. Math Model Appl. 2016;1(2):46-54. doi: 10.11648/j.mma.20160102.13

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  • @article{10.11648/j.mma.20160102.13,
      author = {Mostafa Ranjbar and Maryam Alinaghi},
      title = {Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers},
      journal = {Mathematical Modelling and Applications},
      volume = {1},
      number = {2},
      pages = {46-54},
      doi = {10.11648/j.mma.20160102.13},
      url = {https://doi.org/10.11648/j.mma.20160102.13},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.mma.20160102.13},
      abstract = {The reduction of the emitted noise pollution from the exhaust system of engines is a real challenge for various industries. At this regard, mufflers have been used to reduce the transmitted noise from the engine of vehicles into the surrounding environment. Mufflers are designed to reflect the sound waves produced by the engine in such a way that they partially cancel themselves out. Noise transmission loss performance in muffler depends on its geometry. Therefore, maximization of noise transmission loss in mufflers using shape modification concept is an important research area. In this paper research, maximization of noise transmission in mufflers is studied and investigated. A model is developed to present the absorptive muffler. The muffler structure and its sound absorbing layer are modeled using shells elements. This model analyzes the muffler structure which has effects on the transmission loss (TL). The results are compared to a model without any absorbing layer. It indicates that the thickness and material type of absorbing layer have distinctive effects on the amount of noise transmission loss of muffler over a wide frequency range.},
     year = {2016}
    }
    

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  • TY  - JOUR
    T1  - Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers
    AU  - Mostafa Ranjbar
    AU  - Maryam Alinaghi
    Y1  - 2016/11/25
    PY  - 2016
    N1  - https://doi.org/10.11648/j.mma.20160102.13
    DO  - 10.11648/j.mma.20160102.13
    T2  - Mathematical Modelling and Applications
    JF  - Mathematical Modelling and Applications
    JO  - Mathematical Modelling and Applications
    SP  - 46
    EP  - 54
    PB  - Science Publishing Group
    SN  - 2575-1794
    UR  - https://doi.org/10.11648/j.mma.20160102.13
    AB  - The reduction of the emitted noise pollution from the exhaust system of engines is a real challenge for various industries. At this regard, mufflers have been used to reduce the transmitted noise from the engine of vehicles into the surrounding environment. Mufflers are designed to reflect the sound waves produced by the engine in such a way that they partially cancel themselves out. Noise transmission loss performance in muffler depends on its geometry. Therefore, maximization of noise transmission loss in mufflers using shape modification concept is an important research area. In this paper research, maximization of noise transmission in mufflers is studied and investigated. A model is developed to present the absorptive muffler. The muffler structure and its sound absorbing layer are modeled using shells elements. This model analyzes the muffler structure which has effects on the transmission loss (TL). The results are compared to a model without any absorbing layer. It indicates that the thickness and material type of absorbing layer have distinctive effects on the amount of noise transmission loss of muffler over a wide frequency range.
    VL  - 1
    IS  - 2
    ER  - 

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Author Information
  • Mechanical Engineering Department, Yildirim Beyazit University, Ankara, Turkey

  • Mechanical Engineering Department, Eastern Mediterranean University, Gazimagusa, Turkey

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