Journal of KSNVE (소음진동)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
권호 표지

Optimum Design for Inlet and Outlet Locations of Rectangular Expansion Chamber for Improving Acoustic Performance

사각형 단순 확장소음기의 성능향상을 위한 입$\cdot$출구 위치의 최적설계

  • 김봉준 (부산대학교 기계공학부 대학원) ;
  • 정의봉 (부산대학교 기계공학부 및 기계기술연구소) ;
  • 황상문 (부산대학교 기계공학부 및 기계기술연구소)
  • Published : 1999.08.01
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Abstract

The performance of muffler can be improved for a frequency range of interest by moving inlet and outlet locations. And optimal location of inlet and outlet can be determined to improve the acoustic performance. The optimum design using FEM, however, may take a very long time and be very hard to take inlet and outlet locations as design variables. In this paper, the acoustic performance of reactive type single expansion chamber muffler is predicted using higher order mode theory. The sensitivity analysis of transmission loss with respect to the location of inlet and outlet is suggested. And the acoustic power transmission coefficient for a frequency of interest is used as cost function. Optimum location of inlet and outlet is determined to minimize cost function by using SUMT algorithm.

Keywords

References

  1. Journal of the Acoustical Society of America v.16 The Reflection of Sound due to Change in Corss Section of a Circular J. Miles
  2. Journal of the Acoustical Society of America v.63 Effect of an Expansion Chamber on the Propagation of Sound in Circular Ducts A.I.El-Sharkawy;A.H.Nayfeh
  3. Journal of the Acoustical Society of America v.77 Analysis of Higher-Order Mode Effects in the Circular Expansion Chamber with Mean Flow Jeong-Guon Ih;Byung-Ho Lee
  4. Journal of the Acoustical Society of America v.79 Three-Dimensional Acoustic Analysis of Circular Expansion Chamber with a Side Inlet and a Side Outlet Sung-Il Yi;Byung-Ho Lee
  5. Journal of the Acoustical Society of America v.81 Three-Dimensional Acoustic Analysis of Circular Outlet Expansion Chamber with Side Inlet and End Outlet Sung-Il Yi;Byung-Ho Lee
  6. Journal of Sound and Vibration v.112 Theoretical Prediction of Transmission Loss of Circular Reversing Chamber Mufflers J.-G. Ih;B.-H.Lee
  7. Journal of Sound and Vibration v.137 Derivation of Four-Pole Parameters Including Higher Order Mode Effects for Expansion Chamber Mufflers with Extended Inlet and Outlet M. ${\AA}$bom
  8. Journal of Sound And Vibration v.157 The Reactive Attenuation of Rectangular Plenum Chambers J.-G. Ih
  9. Journal of Sound and Vibration v.116 A Simple Numerical Method for Three-Dimensional Analysis of Simple Expansion Chamber Mufflers of Rectangular as well as Circular Cross-section with a Stationary Medium M. L. Munjal
  10. 한국소음진동공학회지 v.9 no.2 고차모드를 고려한 사각형 단순 확장관의 간편음향해석법의 개선 김봉준;정의봉;황상문
  11. Journal of the Acoustical Society of America v.68 Higher Mode Effects in Circular ducts and Expansion Chambers L. J. Eriksson
  12. Journal of the Acoustical Society of America v.72 Effects of Inlet/Outlet Locations on Higher order modes in Silencers L. J. Eriksson
  13. Acoustics of Ducts and Mufflers M. L. Munjal
  14. Optimum Design Jasbir S. Arora