Prediction Method of Control Valve Noise

잔향실을 이용한 콘트롤 밸브 소음 예측 방법

  • Published : 2002.11.01

Abstract

This paper proposes new method for predicting sound power emitted from the control valve and piping system. The sound power level measurement method using the reverberation chamber is much easy to apply in the field compared to the method using the anechoic chamber. Measured sound power was used to determine the coefficients of the equation predicting sound power level. The noise prediction equation was developed at relative flow coefficient, 0.11. The sound power level predicted is in good agreement with the measured value. Proposed method can be used to express the noise characteristics of the control valves.

새로운 콘트롤 밸브 소음 예측 방법을 제안하고 밸브 및 배관으로 이루어진 시스템에 적용하여 그 가능성을 할인하였다. 기존의 소음 예측 방법은 무향실을 이용하는 기존의 예측방법보다 일반 산업체에서 시험 시설을 설치하기가 용이한 장점이 있다. 측정된 음향파워를 이용하여 소음예측식을 결정하고 상대유량계수 0.11인 경우 소음예측식에 따라 유량 및 차압의 변화에 따른 음향파워레벨을 평가하였고 그 결과가 측정값과 잘 일치함을 확인하였다. 제안된 밸브소음 예측기법은 콘트롤밸브의 소음특성을 나타내는 지표로서 사용할 수 있다.

Keywords

References

  1. IEC 534-8-2 Industrial process control valves- Part 8: Noise Considerations -Section 2: Laboratory measurement of noise generated by hydrodynamic flow through control valves
  2. IEC 534-8-4 Industrial process control valves- Part 8: Noise Considerations -Section Four: Prediction of noise generated by hydrodynamic flow
  3. ISO 3741 Acoustics - Determination of sound power levels of noise sources - Precision methods for broad-band sources in reverberation rooms
  4. Noise Control Eng. J. v.43 no.5 A method to predict sound levels from hydrodynamic sources associated with flow through throttling valves H.D.Baumann;G.W.Page,Jr.