한국수소및신에너지학회논문집 (Journal of Hydrogen and New Energy)

  • 제28권1호
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  • Pages.106-112
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  • 2017
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  • 1738-7264(pISSN)
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  • 2288-7407(eISSN)
한국수소및신에너지학회 (The Korean Hydrogen and New Energy Society)
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음향 카메라를 이용한 가스 파이프라인 볼밸브 유동소음 특성

Characteristics of Flow Induced Noise from a Ball Valve Used for a Gas Pipeline Using an Acoustic Camera

  • KIM, CHUL-KYU (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Build Technology) ;
  • LEE, SANG-MOON (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Build Technology) ;
  • JANG, CHOON-MAN (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Build Technology)
  • 투고 : 2017.01.09
  • 심사 : 2017.02.28
  • 발행 : 2017.02.28
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초록

The present study describes flow induced noise generated from a ball valve used for a gas pipeline. Noise generation from a ball valve mainly induces by interference between unstable(or fluctuating) leakage flow and pipe wall when the ball valve is working closed or opened. To measure the positions of the noise source and the amplitude of noise with respect to measuring frequencies, a commercial acoustic camera is introduced. Noise characteristics generated by the ball valve have been performed by four valve opening rates: 30, 50, 70 and 100 percents. It is noted that 100 percent opening rate means that the valve is fully opened. Throughout the experimental measurements using the acoustic camera, the location of the noise source and the noise amplitude with respect to the frequencies for the test ball valve are clearly evaluated. It is found that the dominant frequencies come from the fluctuating flow at the downstream of the ball valve for four opening rates are observed between 3,000Hz and 3,200Hz. Maximum noise amplitude comes from the ball valve reaches 75dB at the valve opening rate of 50 percent.

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참고문헌

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