Abstract
The noise of aerodynamics nature from modern transonic fan is examined from its sources with the perspective of noise reduction through aero-acoustics design using advanced Computational Fluid Dynamics (CFD) tools. In particular the problems associated with the forward propagating noise in the front is addressed. It is identified that the shock wave spillage from the leading edge near the fan tip is the main source of the tone noise. Two different approaches have been studied to reduce the forward arc tone noise and two state-of-art transonic fans are designed using the strategies developed. The following rig tests show that while the fans exhibit other noise problems, the primary goals of noise reduction have been achieved through both fans and the novel noise reduction concept vindicated.
Similar content being viewed by others
References
NASA. Making Future Aircraft Quieter. NASA Facts, FS-1997-07-003-LeRC, 1997, (www.lerc.nasa.gov/WWW/AST/noise.htm)
Owens, R E. Energy Efficient Engine Performance System- Aircraft Integration Evaluation. NASA/CR 159488, 1979
Cumpsty, N A. A Critical Review of Turbomachinery Noise. Transaction of ASME, Journal of Fluids Engineering, 1977, 99(2): 278–293
Envia, E Fan Noise Reduction: An Overview. NASA TM-2001-210699, 2001
Huff, D L. Fan Noise Prediction: Status and Needs. NASA TM-97-206533, 1997
Tyler, J M, Sofrin, T G. Axial Flow Compressor Noise Studies. SAE Trans., 1962, 70: 309–331
Benzakein, M J, Kazin, S B. Fan Compressor Noise Reduction. ASME Paper 69-GT-9, 1969
Denton, J D, Xu, L. The Effects of Lean and Sweep on Transonic Fan Performance. ASME Paper, ASME GT-2002-30327, 2002
Dupere, I J, Dawes, W N, Tester, B J, et al. Prediction of Multiple Tone Noise and Distortion Noise in a Transonic Fan. 46th ASME International Gas Turbine and Aeroengine Congress, 2001
Bewick, C L, Adams, M J, Schwaller, P G J, et al. Noise and Aerodynamic Design of a Low Tip Speed Fan. AIAA-2001-2268, 2001
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Xu, L., Denton, J.D. Aero-acoustics of modern transonic fans — Fan noise reduction from its sources. J. of Therm. Sci. 12, 104–113 (2003). https://doi.org/10.1007/s11630-003-0050-8
Issue Date:
DOI: https://doi.org/10.1007/s11630-003-0050-8