The primary objective of this work is to study noise propagation in acoustically lined variable area ducts with mean fluid flow. The method of study is numerical in nature and involves a body-fitted grid mapping procedure in conjunction with a factored-implicit finite difference technique. The mean fluid flow model used is two-dimensional, inviscid, irrotational, incompressible, and nonheat conducting. Fully-coupled solutions of the linearized gas dynamic equations are obtained for both positive and negative Mach numbers as well as for hard and soft wall conditions. The factored-implicit finite difference technqiue used did give rise to short wavelength perturbations, but these were dampened by the introduction of higher order artificial dissipation terms into the scheme. Results compared favorably with available numerical and experimental data.
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October 1987
This article was originally published in
Journal of Vibration, Acoustics, Stress, and Reliability in Design
Research Papers
A Mapped Finite Difference Study of Noise Propagation in Nonuniform Ducts With Mean Flow
Peter E. Raad,
Peter E. Raad
Department of Civil and Mechanical Engineering, Southern Methodist University, Dallas, Texas 75275
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James W. White
James W. White
Department of Mechanical and Aerospace Engineering, The University of Tennessee, Knoxville, Knoxville, Tennessee 37996-2210
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Peter E. Raad
Department of Civil and Mechanical Engineering, Southern Methodist University, Dallas, Texas 75275
James W. White
Department of Mechanical and Aerospace Engineering, The University of Tennessee, Knoxville, Knoxville, Tennessee 37996-2210
J. Vib., Acoust., Stress, and Reliab. Oct 1987, 109(4): 372-380 (9 pages)
Published Online: October 1, 1987
Article history
Received:
April 1, 1987
Online:
November 23, 2009
Citation
Raad, P. E., and White, J. W. (October 1, 1987). "A Mapped Finite Difference Study of Noise Propagation in Nonuniform Ducts With Mean Flow." ASME. J. Vib., Acoust., Stress, and Reliab. October 1987; 109(4): 372–380. https://doi.org/10.1115/1.3269456
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