The problem of active, or driven, panel motions of marine vehicles altering the turbulent boundary layer properties is discussed. The coherent (vorticular) structures in a turbulent boundary layer can be altered by the motions of a panel causing those structures to grow more rapidly and, as a result, become prematurely unstable and burst. In addition, the motions of the panel can produce vortices that interact with those that are naturally produced, and change the character of the boundary layer. The motions of the antinodes of the panel can also increase or decrease the surface shear stress, if the panel is, respectively, above or below its mean position. The cumulative effect of the active-panel motions, then, could be to increase the boundary layer drag. An outline of the analysis of this phenomenon is presented.

1.
Adrian
R. J.
,
1979
, “
Conditional Eddies in Isotropic Turbulence
,”
Physics of Fluids
, Vol.
22
, pp.
2065
2070
.
2.
Bernard, D. C., Harlow, F. H., Raneuzahn, R. M., and Zemack, C., 1990, “Spectral Transport Model for Turbulence,” Los Alamos National Lab. Rept. LA-11821-MS, UK-910, July.
3.
Bushnell, D. M., 1991, “Turbulence Modeling in Aerodynamic Shear Flow—Status and Problems,” Proceedings, 29th Aerospace Meeting, AIAA, Paper No.91-0214, Jan.
4.
Duncan
J. H.
,
1986
, “
The Response of an Incompressible, Viscoelastic Coating to Pressure Fluctuations in a Turbulent Boundary Layer
,”
Journal of Fluid Mechanics
, Vol.
171
, pp.
339
363
.
5.
Fiedler
H. E.
,
1988
, “
Coherent Structures in Turbulent Flows
,”
Prog. Aerospace Science
, Vol.
25
, pp.
231
269
.
6.
Hama, F. M., 1957, “Some Current Problems in Turbulent Shear Flows,” Naval Hydrodynamics, ed., S. Corrsin, National Academy of Science, Nat. Research Council Publication 515, Washington, DC.
7.
Kline, S. J., and Afgan, N. H., eds., 1988, “Near-Wall Turbulence,” Proceedings, Zoran Zaric Memorial Conference, Dubrovnik, Yugoslavia, pub. by Hemisphere Pub. Co., New York, NY.
8.
Lamb, H., 1945, Hydrodynamics, Dover Pub. Co., New York, NY.
9.
Laura
P. A. A.
, and
Duran
R.
,
1975
, “
Vibrations of a Clamped Rectangular Plate
,”
Journal of Sound and Vibration
, Vol.
42
, pp.
129
135
.
10.
Schlichting, H., 1960, Boundary Layer Theory, McGraw-Hill Book Co., New York, NY.
11.
Theodorsen, T., 1953, “Mechanism of Turbulence,” Proceedings, 2nd Midwestern Conference on Fluid Mechanics, Bulletin No. 149, Ohio State University, Columbus, OH.
12.
von Ka´rma´in, T., 1921, “U¨tber laminate and turbulente Reibung,” Z. Angew. Math. Mech., p. 233.
13.
Willmarth
W. N.
,
1975
, “
Structure of Turbulence in Boundary Layers
,”
Advances in Applied Mechanics
, Vol.
15
, p.
158
158
.
This content is only available via PDF.
You do not currently have access to this content.