설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)

  • 제26권2호
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  • Pages.91-96
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  • 2014
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
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배관계의 가스누설탐지를 위한 음향모델 연구

A Study on an Acoustical Model for Gas Leak Detection in a Pipeline

  • 양윤상 (서울과학기술대학교 에너지시스템공학과) ;
  • 이동훈 (서울과학기술대학교 기계.자동차공학과) ;
  • 고재필 (한국가스공사연구개발원)
  • Yang, Yoon-Sang (Dept. Energy System Eng., Seoul National University of Science and Technology) ;
  • Lee, Dong-Hoon (Dept. Mechanical and Automotive Eng., Seoul National University of Science and Technology) ;
  • Koh, Jae-Pil (Korea Gas Corporation R&D Division)
  • 투고 : 2013.11.21
  • 심사 : 2013.12.30
  • 발행 : 2014.02.10
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초록

An acoustical model for detecting the leak location in a buried gas pipeline has been developed. This model is divided into an experimental model for sound diagnosis, and a theoretical model for sound prediction, which is based on the transfer matrix method, representing the sound pressure and the volume velocity as state variables. The power spectrum is measured by attaching only one microphone to the closed end pipe. It has been shown that the response magnitude of acoustic pressure signals calculated by the acoustical model depends upon the thickness and diameter of a pinhole. The validity for the acoustical model has been verified through a comparison between the measured and calculated results.

키워드

참고문헌

  1. Lee, D. H, Seo, E. S., Lee, J. W., Kim, H. J., and Lee, H. S., 2010, A development of acoustical model for detecting gas leakage on a piping system, Proceedings of the KSNVE Conference, pp. 764-765.
  2. Lee, D. H, Seo, E. S., Lee, J. W., and Koh, J. P., 2010, An experiment for detecting gas leakage on a piping system using acoustic method, Proceedings of the KSNVE Annual Autumn Conference, pp. 242-243.
  3. Dooly, R. B. and Chexal, V. K., 2000, Flow-accelerated corrosion of pressure vessels in fossile plants, International Journal of Pressure Vessels and Piping, Vol. 77, pp. 85-90. https://doi.org/10.1016/S0308-0161(99)00087-3
  4. Wassef, W. A., Bassim, M. N., Houssny-Emam, M., and Tangri, K., 1985, Acoustic emission spectra due to leaks from circular holes and rectangular slits, J. Acoust. Soc. Am, pp. 916-923.
  5. Kim, M. S., Lee, S. K., Jang, S. Y., and Koh, J. P., 2008, Identification on principle of acoustic wave propagation characteristics in a gas pipe, Journal of KSNVE, Vol. 18 No. 8, pp. 797-804. https://doi.org/10.5050/KSNVN.2008.18.8.797
  6. Kim, M. S., Lee, S. K., Jang, S. Y., and Koh, J. P., 2008, Acoustic wave propagation characteristics corresponding to the cut-off frequency in gas pipeline, Journal of KSNVE, Vol. 18 No. 7, pp. 693-700. https://doi.org/10.5050/KSNVN.2008.18.7.693
  7. Watanabe, K. and Himmelblau, D. M., 1986, Detection and location of leak in a gas-transport pipeline by a new acoustic method, AIChE Journal, Vol. 32, No. 10, pp. 1690-1701. https://doi.org/10.1002/aic.690321012
  8. Munjal, M. L., 1987, Acoustics of Duct and Mufflers, John Wiley and Sons, pp. 75-85.

피인용 문헌

  1. Recent Progress in Air-Conditioning and Refrigeration Research: A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2014 vol.27, pp.7, 2015, https://doi.org/10.6110/KJACR.2015.27.7.380