The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
권호 표지
DOI QR코드

DOI QR Code

Three-Dimensional Noise Analysis of an Axial-Flow Fan using Computational Aero-Acoustics

공력음향학을 이용한 축류홴의 삼차원 소음 해석

  • 김주형 (인하대학교 대학원 기계공학과) ;
  • 김진혁 (인하대학교 대학원 기계공학과) ;
  • 신승열 (인하대학교 대학원 기계공학과) ;
  • 김광용 (인하대학교 대학원 기계공학과) ;
  • 이승배 (인하대학교 대학원 기계공학과)
  • Received : 2011.10.31
  • Accepted : 2012.06.29
  • Published : 2012.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

This paper presents a systematic procedure for three-dimensional noise analysis of an axial-flow fan by using computational aero-acoustics based on Ffowcs Williams-Hawkings equation. Flow-fields of a basic fan model are simulated by solving three-dimensional, unsteady, Reynolds-averaged Navier-Stokes equations using the commercial code ANSYS CFX 11.0. Starting with steady flow results, unsteady flow analysis is performed to extract the fluctuating pressures in the time domain at specified local points on the blade surface of the axial flow fan. The perturbed density wave by rotating blades reaches at the observer position, which is simulated by an in-house noise prediction software based on Ffowcs Williams-Hawkings equation. The detailed far-field noise signatures from the axial-flow fan are analyzed in terms of source types, field characteristics, and interpolation schemes.

Keywords

References

  1. Sharland, I.J., 1964, "Sources of Noise in Axial Flow Fans," Journal of Sound and Vibration, Vol. 1, No. 3, pp. 302-322. https://doi.org/10.1016/0022-460X(64)90068-9
  2. Lighthill, M.J., 1952, "On Sound Generated Aerodynamically; I. General Theory," Proc. Roy. Soc. London Ser. A., Vol. 211, pp. 564-587. https://doi.org/10.1098/rspa.1952.0060
  3. 배일성, 장성욱, 이승배, 2001, "DRL 축류홴 주위의 난류유동 및 공력소음의 계산," 소음진동학회 춘계학술대회논문집, pp. 762-767.
  4. Ffowcs Williams, J.E., and Hawkings, D.L., 1969, "Theory Relating to the Noise of Rotating Machinery," Journal of Sound and Vibration, Vol. 10, No. 1, pp. 10-21. https://doi.org/10.1016/0022-460X(69)90125-4
  5. Lee, C. and Kil, H. G., 2010, "Aero-Acoustic Performance Prediction Method of Axial Flow Fan," The 17th International Congress on Sound & Vibration, Cairo, Egypt ICSV17-633.
  6. ANSYS CFX-11.0, 2006, ANSYS CFX-Solver Theory Guide, ANSYS Inc.
  7. Kim, J. H., Kim, J. W., and Kim, K. Y., 2011, "Axial-Flow Ventilation Fan Design Through Multi-Objective Optimization to Enhance Aerodynamic Performance," ASME Journal of Fluids Engineering, Vol. 133, No. 10, Paper 101101(12pp). https://doi.org/10.1115/1.4004906