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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study on an Acoustical Model for Gas Leak Detection in a Pipeline

배관계의 가스누설탐지를 위한 음향모델 연구

  • 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)
  • 양윤상 (서울과학기술대학교 에너지시스템공학과) ;
  • 이동훈 (서울과학기술대학교 기계.자동차공학과) ;
  • 고재필 (한국가스공사연구개발원)
  • Received : 2013.11.21
  • Accepted : 2013.12.30
  • Published : 2014.02.10
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Abstract

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.

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References

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  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