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Study On Noise Reduction of Nozzle Shock Diamond Flow Destroyed by Flexible Components

Received: 5 March 2014     Accepted: 10 April 2014     Published: 20 April 2014
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Abstract

It's well known that the high pressure flow running through the nozzle yields shock diamond flow which mainly causes the noise. This work employed flexible components on the nozzle outlet to destroy shock diamond flow and using micro color schlieren technique to visual the dispersion shock diamond. Experiments adjusted conditions of and mesh flexible components for optimal design. The results show that wire diameter 0.5mm of cross flexible component, away from nozzle 0.5cm and 1cm received the noise of 83.8dB, the reducing rate was ca.12.5%. The mesh 100 flexible component away from nozzle 0.5cm received the noise of 75.6dB, the reducing rate was ca. 21.17%.

Published in American Journal of Optics and Photonics (Volume 2, Issue 2)
DOI 10.11648/j.ajop.20140202.11
Page(s) 12-17
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), 2014. Published by Science Publishing Group

Keywords

Nozzle Noise, Nozzle Flow, Micro Color Schlieren, Shock Diamond Flow

References
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[6] Q.F. Lin, “Design and application of “industrial ventilation,” Environmental Progress, vol. 56, 2002.
[7] E. Gonzalez, F. Marzal, A. Minana and M. Doval, “Influence of exhaust hood geometry on the capture efficiency of lateral exhaust and push-pull ventilation systems in surface treatment tanks,” Environmental Progress, vol. 27, 2008, pp. 405-411.
[8] B. Lishman and A. W. Woods, “The effect of gradual changes in wind speed or heat load on natural ventilation in athermally massive building,” Building and Environment, vol. 44, 2009, pp. 762-772.
[9] N. T. Chen, C. C. Chiang, C. P. T. Chou, Y. P. Lin and Z. L. Chen, “Bedroom opening fitted vertical louvers on the impact of indoor natural ventilation,” Architectural Journal,61, 2007, pp.63-78.
[10] Q. Q. Chen, “Kitchen transom hole high rate of carbon dioxide concentration field and the effect of ventilation rate,” Master's thesis, National Cheng Kung University, Tainan, 2000.
[11] H. Y. Chen, “Theory of design exclusion pollution in plant,” Master's thesis, Department of Refrigeration, Air Conditioning and Energy Engineering, Tainan, 2007.
[12] Z. X. Ma, “Blowing suction Industrial Ventilation hood numerical simulation of turbulent diffusion,” master's thesis, Department of Mechanical Engineering, National Taiwan University of Technology, Taipei, 2005.
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Cite This Article
  • APA Style

    Chung-Hwei Su, Chien-Chih Chen, Yi-Hua Pan, Chen-Ching Ting. (2014). Study On Noise Reduction of Nozzle Shock Diamond Flow Destroyed by Flexible Components. American Journal of Optics and Photonics, 2(2), 12-17. https://doi.org/10.11648/j.ajop.20140202.11

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    ACS Style

    Chung-Hwei Su; Chien-Chih Chen; Yi-Hua Pan; Chen-Ching Ting. Study On Noise Reduction of Nozzle Shock Diamond Flow Destroyed by Flexible Components. Am. J. Opt. Photonics 2014, 2(2), 12-17. doi: 10.11648/j.ajop.20140202.11

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    AMA Style

    Chung-Hwei Su, Chien-Chih Chen, Yi-Hua Pan, Chen-Ching Ting. Study On Noise Reduction of Nozzle Shock Diamond Flow Destroyed by Flexible Components. Am J Opt Photonics. 2014;2(2):12-17. doi: 10.11648/j.ajop.20140202.11

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  • @article{10.11648/j.ajop.20140202.11,
      author = {Chung-Hwei Su and Chien-Chih Chen and Yi-Hua Pan and Chen-Ching Ting},
      title = {Study On Noise Reduction of Nozzle Shock Diamond Flow Destroyed by Flexible Components},
      journal = {American Journal of Optics and Photonics},
      volume = {2},
      number = {2},
      pages = {12-17},
      doi = {10.11648/j.ajop.20140202.11},
      url = {https://doi.org/10.11648/j.ajop.20140202.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajop.20140202.11},
      abstract = {It's well known that the high pressure flow running through the nozzle yields shock diamond flow which mainly causes the noise. This work employed flexible components on the nozzle outlet to destroy shock diamond flow and using micro color schlieren technique to visual the dispersion shock diamond. Experiments adjusted conditions of and mesh flexible components for optimal design. The results show that wire diameter 0.5mm of cross flexible component, away from nozzle 0.5cm and 1cm received the noise of 83.8dB, the reducing rate was ca.12.5%. The mesh 100 flexible component away from nozzle 0.5cm received the noise of 75.6dB, the reducing rate was ca. 21.17%.},
     year = {2014}
    }
    

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  • TY  - JOUR
    T1  - Study On Noise Reduction of Nozzle Shock Diamond Flow Destroyed by Flexible Components
    AU  - Chung-Hwei Su
    AU  - Chien-Chih Chen
    AU  - Yi-Hua Pan
    AU  - Chen-Ching Ting
    Y1  - 2014/04/20
    PY  - 2014
    N1  - https://doi.org/10.11648/j.ajop.20140202.11
    DO  - 10.11648/j.ajop.20140202.11
    T2  - American Journal of Optics and Photonics
    JF  - American Journal of Optics and Photonics
    JO  - American Journal of Optics and Photonics
    SP  - 12
    EP  - 17
    PB  - Science Publishing Group
    SN  - 2330-8494
    UR  - https://doi.org/10.11648/j.ajop.20140202.11
    AB  - It's well known that the high pressure flow running through the nozzle yields shock diamond flow which mainly causes the noise. This work employed flexible components on the nozzle outlet to destroy shock diamond flow and using micro color schlieren technique to visual the dispersion shock diamond. Experiments adjusted conditions of and mesh flexible components for optimal design. The results show that wire diameter 0.5mm of cross flexible component, away from nozzle 0.5cm and 1cm received the noise of 83.8dB, the reducing rate was ca.12.5%. The mesh 100 flexible component away from nozzle 0.5cm received the noise of 75.6dB, the reducing rate was ca. 21.17%.
    VL  - 2
    IS  - 2
    ER  - 

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Author Information
  • Department of Safety, Health and Environmental Engineering, National Kaohsiung First University of Science and Technology, Taiwan

  • GraduateInstituteof Mechanical and Electrical Engineering, National Taipei University of Technology, Taipei, 10608 Taiwan

  • Institute of Mechatronic Engineering, National Taipei University of Technology, Taipei, 10608 Taiwan

  • Department of Mechanical Engineering, National Taipei University of Technology, Taipei, 10608 Taiwan

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