The Journal of the Acoustical Society of Korea

The Acoustical Society of Korea (한국음향학회)
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Development of Hybrid Method for the Prediction of Internal Flow-induced Noise and Its Application to Throttle Valve Noise in an Automotive Engine

  • Cheong, Cheol-Ung (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kim, Sung-Tae (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kim, Jae-Heon (Technical Venture T.F.T, R&D Division, Hyundai Motor Company) ;
  • Lee, Soo-Gab (School of Mechanical and Aerospace Engineering, Seoul National University)
  • Published : 2003.12.01
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Abstract

General algorithm is developed for the prediction of internal flow-induced noise. This algorithm is based on the integral formula derived by using the General Green Function, Lighthill's acoustic analogy and Curl's extension of Lighthill's. Novel approach of this algorithm is that the integral formula is so arranged as to predict frequency-domain acoustic signal at any location in a duct by using unsteady flow data in space and time, which can be provided by the Computational Fluid Dynamics Techniques. This semi-analytic model is applied to the prediction of internal aerodynamic noise from a throttle valve in an automotive engine. The predicted noise levels from the throttle valve are compared with actual measurements. This illustrative computation shows that the current method penn its generalized predictions of flow noise generated by bluff bodies and turbulence in flow ducts.

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References

  1. B. E. Mitchell, S. K. Lele, and P. Moin, 'Direct com-putation of mach wave radiation in an axisymmetric supersonic jet,' AIAA J., 35, 1574-1580, 1997 https://doi.org/10.2514/2.15
  2. J. B. Freund, 'Acoustic sources in a turbulent jet: a direct numerical simulation study,' CEAS/AIAA Paper, 98-1858, 1999
  3. C. K. W. Tam, 'Computational aeroacoustlcs: issues and methods,' AIAA J., 33, 1788-1790, 1995 https://doi.org/10.2514/3.12728
  4. S. K. Lele, 'Computational aeroacoustics a review,' AIAA 97-0018, 1997
  5. P. E. Doak, 'Excitation, transmission and radiation of sound from source distributions in hard-walled ducts of finite length (I): The effects of duct cross-section ge-ometry and source distribution space-time,' Journal of Sound and Vibration, 31, 1-72, 1973 https://doi.org/10.1016/S0022-460X(73)80249-4
  6. H. G. Davies and J. E. Ffowcs Williams, 'Aerodynamic sound generation in a pipe," Journal of Fluid Mechanics, 32, 765-778, 1968 https://doi.org/10.1017/S0022112068001011
  7. C. G. Gordon, 'Spoiler-generated flow noise (I): The experiment,' Journal of the Acoustical Society of America, 43, 1041-1048, 1968 https://doi.org/10.1121/1.1910937
  8. C. G. Gordon, 'Spoiler-generated flow noise (I): results,' Journal of the Acoustical Society of America, 45, 214-223, 1969 https://doi.org/10.1121/1.1911359
  9. P. A. Nelson and C. L. Morfey, 'Aerodynamic sound production in low speed flow ducts,' Journal of Sound and Vibration, 79, 263-289, 1981 https://doi.org/10.1016/0022-460X(81)90372-2
  10. D. J. Oldham and A. U. Ukopoho, 'A pressure-based technique for predicting regenerated noise levels in ventilation systems,' Journal of Sound and Vibration, 140 (2), 263-289, 1990
  11. M. J. Lighthill, 'On sound generated aerodynamically-I. general theory,' Proceedings of the Royal Society Series A., 211, 564-587, 1952 https://doi.org/10.1098/rspa.1952.0060
  12. N. Curle, 'The influence of solid boundaries upon aerody-namic sound,' Proceedings of the Royal Society Series A., 231, 505-514, 1955 https://doi.org/10.1098/rspa.1955.0191
  13. B. P. Leonard, 'A stable and accurate convective modeling procedure based on quadratic upstream interpolation,' Comput. Method Appl. Mech. Engng., 19, 56-98, 1979
  14. R. D. Richtmeyer, and K. W. Morton, Difference Methods for Initial-Value Problems, 2nd Edition, Wiley-Interscience, New York, 1967
  15. R. I. Issa, 'Solution of the implicitly discretised fluid flow equations by operator-splitting,' J. Compo Phys., 62, 4065, 1986
  16. I. Demirdzic, and M. Peric, 'Space conservation law in finite volume calculations of fluid flow,' Int. J. Numer. Methods in Fluids, 8, 1037-1050, 1988 https://doi.org/10.1002/fld.1650080906
  17. A. P. Dowling, and J. E. Ffowcs Williams, Sound and Sources of Sound, Ellis Horwood Limited, 1983