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On a Tollmien-Schlichting wave packet produced by a turbulent spot

Published online by Cambridge University Press:  19 April 2006

I. Wygnanski ,
J. H. Haritonidis  and
R. E. Kaplan
I. Wygnanski
Affiliation:
University of Southern California, Los Angeles Present address: School of Engineering, Tel Aviv University, Ramat Aviv, Tel Aviv, Israel.
J. H. Haritonidis
Affiliation:
University of Southern California, Los Angeles
R. E. Kaplan
Affiliation:
University of Southern California, Los Angeles
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Abstract

Experimental investigations in the region following the passage of an isolated turbulent spot in a laminar boundary layer reveal the existence of a pair of oblique wave packets. These packets are swept at an angle of approximately 40°, and exhibit frequency and wave speed characteristics in agreement with predictions made for oblique Tollmien-Schlichting waves. No waves exist near the centreline of the spot.

Several observations of the breakdown of this ordered motion into a new turbulent spot are shown. This breakdown is accompanied by the appearance of an intense shear layer inclined to the wall.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 92 , Issue 3 , 12 June 1979 , pp. 505 - 528
Copyright
© 1979 Cambridge University Press

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References

Betchov, R. & Criminale, W. O. 1967 Stability of Parallel Flows. New York: Academic Press.
Blackwelder, R. F. & Kaplan, F. E. 1976 J. Fluid Mech. 76, 89.
Cantwell, B., Coles, D. & Dimotakis, P. 1977 California Inst. Tech., Dept. Aeronaut. Interim Rep. ENG-7680150.
Chen, P. C. 1972 Ph.D. Thesis, University of South California.
Coles, D. & Barker, S. J. 1975 Turbulent Mixing in Nonreactive and Reactive Flows, p. 285. Plenum Press.
Drazin, P. G. & Howard, L. N. 1966 Advances in Applied Mechanics. New York: Academic Press.
Elder, J. 1960 J. Fluid Mech. 9, 235.
Emmons, H. W. 1951 J. Aero. Sci. 18, 490.
Gaster, M. 1968 J. Fluid Mech. 32, 173.
Gaster, M. & Grant, I. 1975 Proc. Roy. Soc. A 347, 253.
Kaplan, R. E. 1964 M.I.T. Rep. ASRL TR-116-1.
Klebanoff, P. S., Tidstrom, K. D. & Sargent, L. M. 1962 J. Fluid Mech. 12, 1.
Komoda, H. 1967 Phys. Fluids Suppl. 10, S87.
Komoda, H. 1974 Private communication (I.W.)
Kovasznay, L. S. G., Kibens, V. & Blackwelder, R. F. 1970 J. Fluid Mech. 41, 283.
Kovasznay, L. S. G., Komoda, H. & Vasudeva, B. R. 1962 Proc. Heat Transfer Fluid Mech. Inst., Stanford Univ. Press.
Landahl, M. T. & Kaplan, R. E. 1965 Agardograph 97, part I, p. 363. Paris.
Mochizuki, M. 1961 J. Phys. Soc. Japan, 16, 995.
Oster, D., Wygnanski, I. & Fiedler, H. 1976 In Turbulence in Internal Flows (ed. S. N. B. Murthy), p. 67. Hemisphere Press.
Schubauer, G. B. & Klebanoff, P. S. 1956 N.A.C.A. Rep. no. 1289.
Schubauer, G. B. & Skramstad, H. K. 1947 N.A.C.A. Tech. Rep. no. 909.
Squire, H. B. 1933 Proc. Roy. Soc. A 142, 621.
Wazzan, A. R., Okamura, T. T. & Smith, A. M. O. 1968 DAC-67086, Sept. 1, 1968. McDonnell Douglas Corp.
Wygnanski, I., Sokolov, M. & Friedman, D. 1975 J. Fluid Mech. 69, 283. 1976 J. Fluid Mech. 78, 785.
Zilberman, M., Wygnanski, I. & Kaplan, R. E. 1976 Phys. Fluids Suppl. 20, S 258.