Earticle

초록

영어

There are many disadvantages to existing silencers used in power plants. Recently, high-performance silencers are required in society, so it is necessary to develop silencers accordingly. Therefore, in this study, to develop the flow silencer by taking advantage of the foamed aluminum, the property values such as loss coefficient and porosity were obtained through experiments, based on the Forchheimer's law. CFD analysis was performed by applying a porous modeling technique to foamed aluminum and the results were compared with experimental values. The error rate between the results of the experiment and the flow analysis is within about 2.79%, so the results of the experiment and the analysis agree relatively well. When the foamed aluminum was installed, the flow noise was reduced by about 5.14dB.

목차

ABSTRACT
1. 서론
2. 다공체 압력강하 이론식
3. 발로알루미늄 압력강하 실험
3.1 실험장치 및 방법
3.2 실험 결과 고찰
4. 발포알루미늄 CFD 해석
4.1 유동해석 모델
4.2 격자생성 및 경계조건
4.3 CFD 해석 결과 및 실험결과비교 
5. 유동해석을 통한 소음강도 계산
6. 결론
References

키워드

유동소음기 발포알루미늄 다공도 다공성 매질 손실계수 2차 저항계수 압력강하 전산유체역학 Flow silencer Foamed aluminium Porosity Porous media Loss coefficient Quadratic resistance coefficient Pressure drop CFD

저자

• 김나용 [ Na-Yong Kim | Automotive Engineering, Graduate School, Gyeongnam National University of Science and Technology ]
• 김봉환 [ Bong-Hwan Kim | Member, Gyeongnam National University of Science and Technology ] Corresponding Author

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