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

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

DOI QR Code

Study on Shear Layer Correction of Microphone Array Measurement in the Wind Tunnel Test

풍동 조건의 마이크로폰 어레이 측정에서 전단층 보정에 관한 연구

  • 김위준 (충남대학교 항공우주공학과) ;
  • 이욱 (충남대학교 항공우주공학과) ;
  • 최종수 (충남대학교 항공우주공학과)
  • Published : 2008.06.20
Download PDF
⟨ Previous Next ⟩

Abstract

Microphone array beamforming method has been recognized as an important aeroacoustic research field and become a standard technique in localizing sound sources. This method also used in flight acoustic measurement, and especially, it is very useful when measure sounds inside the wind tunnel. In measuring sound which is inside the wind tunnel by traditional beamforming method, there are some errors caused by airstream. The speed and the propagation path of the sound changes as it travel through the airstream. This makes the error which the position of sound is changed a little bit to the down stream direction. In this paper, validation test has made about the correction equation for this wind effects of previous researches. And beamforming including shear layer correction was performed about a sound source in the anechoic open-jet wind tunnel.

Keywords

References

  1. Mueller, T. J.(Ed..), 2002, 'Aeroacoustic Measurements, Springer-Verlag', Berlin
  2. Amiet, R. K., 1978, 'Refraction of Sound by a Shear Layer', Journal of Sound and Vibration, Vol. 58, No. 4, pp. 467-482 https://doi.org/10.1016/0022-460X(78)90353-X
  3. Oerlemans, S. and Sijtsma, P., 2004, 'Acoustic Array Measurements of a 1:10.6 Scaled Airbus A340 Model', AIAA-2004-2924, Proc. of 10th AIAA/CEAS Aero-acoustics Conference
  4. Remillieux, M., Camargo, H., Burdisso, R. and Ng, W., 2007, 'Aeroacoustic Study of a 26 %-scale, High-fidelity, Boeing 777 Main Landing Gear in a Semi-anechoic-wind-tunnel Test Section', AIAA-2007-3453, Proc. of 13th AIAA/CEAS Aeroacoustics Conference
  5. Brusniak, L., Underbrink, J. and Nesbitt, E., 2007, 'Phased Array Measurements of Full-scale Engine Exhaust Noise', AIAA-2007-3612, Proc. of 13th AIAA/CEAS Aero-acoustics Conference
  6. Rhee, W., Park, S., Choi, J.-S. and Kim, J. M., 2006, 'Elimination of Self Noise & Doppler Effects from the Microphone Array Measurement', Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 16, No. 7, pp. 677-682 https://doi.org/10.5050/KSNVN.2006.16.7.677
  7. Kim, W. J., Rhee, W. and Choi, J.-S., 2007, 'Performance Enhancement of Beamforming Method Using Moving Microphone Array', Proc. of JSASS-KSAS Joint International Symposium on Aerospace Engineering