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Sound generation and upstream influence due to instability waves interacting with non-uniform mean flows

Published online by Cambridge University Press:  20 April 2006

M. E. Goldstein
M. E. Goldstein
Affiliation:
National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio 44135
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Abstract

Recent experiments reveal that mean spreading rates of artificially excited shear layers undergo abrupt changes at certain discrete positions within the flow. This paper is concerned with the interaction between externally excited instability waves and these regions of relatively sudden change in mean flow. While the main emphasis is on the acoustic field produced by these interactions, the upstream influence at the nozzle lip is also considered.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 149 , December 1984 , pp. 161 - 177
Copyright
© 1984 Cambridge University Press

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References

Abramowitz, M. & Stegun, I. A. 1964 Handbook of Mathematical Functions. National Bureau of Standards.
Champagne, F. & Wygnanski, I. 1984 Submitted to J. Fluid Mech.
Crighton, D. G. 1981 J. Fluid Mech. 106, 261.
Crighton, D. G. & Leppington, F. G. 1974 J. Fluid Mech. 64, 393.
Crow, S. C. & Champagne, F. H. 1971 J. Fluid Mech. 48, 547.
Drazin, P. G. & Howard, H. N. 1966 Adv. Appl. Mech. 9, 1.
Ffowcs Williams, J. E. & Kempton, A. J. 1978 J. Fluid Mech. 84, 673.
Gaster, M., Kite, E. & Wygnanski, I. 1984 Large-scale structures in a forced turbulent mixing layer. Submitted to J. Fluid Mech.Google Scholar
Goldstein, M. E. 1979 J. Fluid Mech. 91, 601.
Gradshteyn, I. S. & Ryzhik, I. M. 1965 Tables of Integrals, Series, and Products. Academic.
Ho, C. M. & Huang, L.-S. 1982 J. Fluid Mech. 119, 443.
Horlock, J. H. 1978 Actuator Disk Theory. McGraw-Hill.
Huerre, P. & Crighton, D. G. 1983 Sound generation by instability waves in a low Mach number flow. AIAA 8th Aeroacoustics Conf., Paper 83–0661.Google Scholar
Kibbns, V. 1980 AIAA J. 18, 434.
Kim, H. 1983 Noise from acoustically excited jets. Ph.D. thesis, University of Minnesota, St Anthony Falls Hydraulics Laboratory (to be published).
Laufer, J. & Yen, T.-C. 1983 Nature of the acoustic sources in a low Mach number jet. AIAA 8th Aeroacoustics Conf. Paper 83–0660.Google Scholar
Lighthill, M. J. 1952 Proc. R. Soc. Lond. A211, 564.
Lighthill, M. J. 1964 An Introduction to Fourier Analysis and Generalized Functions. Cambridge University Press.
Nayfeh, A. H. 1973 Perturbation Methods. Wiley.
Oster, D. & Wygnanski, I. 1982 J. Fluid Mech. 123, 91.
Rienstra, S. W. 1981 J. Fluid Mech. 108, 443.
Strange, P. J. R. & Crighton, D. G. 1983 J. Fluid Mech. 139, 231.
Tam, C. K. W. & Morris, P. J. 1980 J. Fluid Mech. 98, 349.
Van Dyke, M. 1964 Perturbation Methods in Fluid Mechanics. Academic.
Zaman, K. B. M. Q. 1983 Large scale coherent structure and far-field jet noise. Presented at 4th Turbulent Shear Flow Conf., Karlsruhe, 12–14 September.