Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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An Empirical Acoustic Impedance Model for the Design of Acoustic Resonator with Extended Neck at a High Pressure Environment

높은 음압에서의 내부 확장관형 음향 공명기의 설계를 위한 실험적 음향 임피던스 모델

  • Received : 2012.08.24
  • Accepted : 2012.11.02
  • Published : 2012.12.20
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Abstract

An empirical acoustic impedance model of acoustic resonators with extended neck at a high sound pressure environment is proposed. The acoustic resonator with extended neck into its cavity is appropriate for the launcher fairing application because the length of neck does not increase the total height of the resonator. This enables one to design slim and light acoustic resonators for launch vehicles. The suggested acoustic impedance model considers the incident pressure and geometric variables(the neck length, the perforation ratio and the hole diameter) in terms of non-dimensional variables. Several acoustic resonators with extended neck are manufactured and their wall impedances are measured according to the pre-defined incident pressure levels. Effects of non-dimensional variables on the non-linear acoustic impedance are investigated so that a simple non-linear impedance model for the launcher fairing application can be proposed. It is demonstrated that the estimated acoustic resistance and acoustic length correction show reasonable agreement with the measured ones within the range of design parameters for launcher fairings.

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References

  1. Park, S.-H. and Seo, S.-H., 2012, Low-frequency Noise Reduction in an Enclosure by Using a Helmholtz Resonator Array, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 22, No. 8, pp. 756-762. https://doi.org/10.5050/KSNVE.2012.22.8.756
  2. Seo, S.-H., Park, S.-H., Jeong, H.-K. and Jang, Y.-S., 2011, Acoustic Analysis in the Payload Fairing of Launch Vehicle, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 21, No. 12, pp. 1146-1151. https://doi.org/10.5050/KSNVE.2011.21.12.1146
  3. Troclet, B., Chemoul, B., Roux, P., Gely, D. and Elias, G., 1999, Synthesis of Vibroacoustic Studies Performed during Ariane 5 Program, 1er Colloque Europeen sur la Technologie des Lanceurs "Vibration des Lanceurs" Toulouse, France.
  4. Ingard, U., 1953, On the Theory and Design of Acoustic Resonators, Journal of the Acoustical Society of America, Vol. 25, No. 6, pp. 1037-1061. https://doi.org/10.1121/1.1907235
  5. Hersh, A. S., Walker, B. E. and Celano, J. W., 2003, Helmholtz Resonator Impedance Model, Part 1: Nonlinear Behavior, AIAA Journal, Vol. 41, No. 5, pp, 795-808. https://doi.org/10.2514/2.2041
  6. Selamet, A. and Lee, I., 2003, Helmholtz Resonator with Extended Neck, Journal of Acoustical Society of America, Vol. 113, No. 4, pp. 1975-1985. https://doi.org/10.1121/1.1558379
  7. Kang, Z. and Ji, Z., 2008, Acoustical Length Correction of Duct Extension Into a Cylindrical Chamber, Journal of Sound and Vibration, Vol. 310, No. 4-5, pp. 782-791. https://doi.org/10.1016/j.jsv.2007.11.005
  8. Fox, R. W. and McDonald, A. T., 1985, Introduction to Fluid Mechanics, John Wiley & Sons, New York, pp. 296-303.
  9. Seybert, A. F. and Ross, D. F., 1977, Experimental Determination of Acoustic Properties Using a Two-microphone Random-excitation Technique, Journal of the Acoustical Society of America, Vol. 61, No. 5, pp. 1362-1370. https://doi.org/10.1121/1.381403
  10. Morse, P. M. and Ingard, K. U., 1968, Theoretical Acoustics, McGraw-Hill, New-York, pp. 758-760.
  11. Mechel, F. P. and Ver, I. L., 1992, Sound-absorbing Materials and Sound Absorbers, Noise and Vibration Control Engineering, edited by Beranek, L. L and Ver., I. L., John Wiley & Sons, New-York, pp. 232-234.
  12. Maa, D.-Y., 1994, Microperforated Panel at High Sound Intensity, Proceedings of Inter-Noise 94, pp. 1511-1514.