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왕복압축기용 머플러의 유동-음향 성능 특성에 대한 수치적 고찰
김상현(Sanghyeon Kim),정철웅(Cheolung Cheong),김해승(Haeseung Kim),이효재(Hyojae Lee) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10
In a compressor, highly impulsive pressure fluctuations induced by a reciprocating piston and valves cause noise and vibration to be so critical issues that low noise requirement always challenges engineers developing it. A muffler is frequently used for reducing these impulsive noise components, but has adverse effects on compressor’s performance due to additional pressure drop and heat transfer of refrigerant when it pass through the muffler. In this study, compressible full 3-dimensional CFD simulations are performed to investigate both of flow and acoustic performances of a muffler in use for compressors. On a basis of the analysis results, a parametric study using design factors introduced to improve flow and acoustic performances of the existing muffler is carried out. Finally, improved designs are suggested to confirm the current results.
압축기용 머플러의 유동-음향특성에 대한 수치적/실험적 연구
김상현(Sanghyeon Kim),정철웅(Cheolung Cheong),박재성(Jaeseong Park),김해승(Haeseung Kim),이효재(Hyojae Lee) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.4
In a reciprocating compressor, highly impulsive pressure fluctuations induced by a reciprocating piston cause serious noise and vibration problems. A muffler is frequently used to reduce this impulsive noise, but also has adverse effects on compressor performance due to additional pressure drop and heat transfer of refrigerants. Therefore, the flow and acoustic performance of mufflers should be considered simultaneously. In this study, both of flow and acoustic performances of mufflers are investigated using computational fluid dynamics techniques. Acoustic and flow performances of two types of muffler are compared in terms of transmission loss and mass flow rate. The experiments using the proto-types are performed to confirm the predicted results and validity of applied numerical methods.