• Journal of Advanced Marine Engineering and Technology
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• 제34권2호
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• pp.275-281
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• 2010

선박용 엔진 또는 플랜트 시스템에 사용되는 대형 소음기의 개발단계에서 비용절감 및 개발기간의 단축을 위하여 축소모형으로 대체 실험이 가능하도록 기하상사법을 제안하고자 한다. 대형 소음기를 구성하고 있는 공명형과 단순 확장관형 소음기의 원형과 축소 모형에 대한 이론식으로부터 기하상사 변수를 규명하였다. 그리고 음향해석을 통하여 조합형과 배플형의 축소 모형에 기하상사법을 적용하여 원형모형의 성능을 예측하고, 이를 원형모형의 실제 성능과 비교하는 방법으로 기하상사 변수를 검증하였다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2012년도 춘계학술대회 논문집
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• pp.861-866
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• 2012

Turbo-charger noise radiated from air intake part is one of the most important noise sources in diesel power plant. In this paper, intake noise control of the diesel power plant was studied using parallel baffle type silencer and concentric hole-cavity resonator simultaneously. Firstly, acoustical characteristics and attenuation performance for parallel baffle type silencer were investigated through theoretical approach and experimental method. Based on the results, optimal design of the parallel baffle silencer was suggested. Secondly, for reducing the low frequency noise contained in the intake noise, the concentric hole-type resonator was developed and the acoustic performance was verified from the test. By combining two types of silencers, it is expected that the overall insertion loss is about 50 dB. So, the combined silencer is very helpful in reducing the intake noise of diesel power plant.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2005년도 춘계 학술대회논문집
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• pp.169-172
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• 2005

A numerical analysis was made In investigate the pressure diminution of a silencer with baffles for high pressure blast flow fields. Reynolds-Averaged Navier-Stokes equations were solved for an axisymmetric computational domain constructed by multi block Chimera grids. A blast flow field was calculated for the silencers that are with one and three baffles. The evolution of high pressure blast flow fields was observed by depicting calculated contours of pressure. It was found that the tested silencer could achieve 97.7 percent pressure diminution.

• 대한기계학회논문집B
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• 제31권3호
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• pp.217-224
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• 2007

A numerical analysis for a silencer with three baffles of 120mm tank gun has been performed. The Reynolds-Averaged Wavier-Stokes equations with Baldwin-Lomax turbulence model were employed to compute unsteady, compressible flow inside the tank gun and the silencer. An axisymmetric computational domain was constructed by using 12 multi block chimera grids. The resolution of flow field is observed by depicting calculated pressure and muzzle brake force. The peak blast pressure and noise through the silencer reduced approximately 99% and 41dB in comparison to the tank gun without the silencer at near filed.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2000년도 춘계학술대회논문집
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• pp.1681-1686
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• 2000

Absorption silencer is one of the most noise reduction devices and covered a wide range of noise matters. On account of the acoustical properties of absorption silencers depend on variable factor and complex matters, the design of silencers couldn't to be exact in various fields. In this study, we predicted the acoustical properties of absorptive silencers based on measured data and assumed how the acoustical properties is changed following baffle thickness, variable baffle form and open area. Also we recorded the pressure drop at each other. So it may a great help to engineer who install and design a silencer in various fields.